README
======
This README discusses issues unique to NuttX configurations for the
STMicro STM32F4Discovery development board featuring the STM32F407VGT6
MCU. The STM32F407VGT6 is a 168MHz Cortex-M4 operation with 1Mbit Flash
memory and 128kbytes. The board features:
- On-board ST-LINK/V2 for programming and debugging,
- LIS302DL, ST MEMS motion sensor, 3-axis digital output accelerometer,
- MP45DT02, ST MEMS audio sensor, omni-directional digital microphone,
- CS43L22, audio DAC with integrated class D speaker driver,
- Four user LEDs and two push-buttons,
- USB OTG FS with micro-AB connector, and
- Easy access to most MCU pins.
Refer to http://www.st.com/internet/evalboard/product/252419.jsp for
further information about this board.
NOTE: This port was developed on the original board, order code
STM32F4DISCOVERY. That board has been replaced with the new order code
STM32F407VG-DISC1. The new version of the board differs in at least these
ways:
- The ST-LINK/V2 has been updated to ST-LINK/V2-A on STM32F407G-DISC1
with a Virtual Com port and Mass storage.
- LIS3DSH ST MEMS 3-axis accelerometer
Contents
========
- LEDs
- RGB LED Driver
- PWM
- UARTs
- Timer Inputs/Outputs
- Nintendo Wii Nunchuck
- Quadrature Encoder
- FPU
- STM32F4DIS-BB
- RTC DS1307
- SSD1289
- UG-2864AMBAG01 / UG-2864HSWEG01
- NiceRF LoRa (2AD66-LoRa V2)
- Ethernet SPI Module ENC28J60
- HCI UART
- STM32F4Discovery-specific Configuration Options
- BASIC
- Testing LLVM LIBC++ with NuttX
- Configurations
LEDs
====
The STM32F4Discovery board has four LEDs; green, orange, red and blue on the
board. These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
defined. In that case, the usage by the board port is defined in
include/board.h and src/up_leds.c. The LEDs are used to encode OS-related
events as follows:
SYMBOL Meaning LED1* LED2 LED3 LED4
green orange red blue
------------------- ----------------------- ------- ------- ------- ------
LED_STARTED NuttX has been started ON OFF OFF OFF
LED_HEAPALLOCATE Heap has been allocated OFF ON OFF OFF
LED_IRQSENABLED Interrupts enabled ON ON OFF OFF
LED_STACKCREATED Idle stack created OFF OFF ON OFF
LED_INIRQ In an interrupt** ON N/C N/C OFF
LED_SIGNAL In a signal handler*** N/C ON N/C OFF
LED_ASSERTION An assertion failed ON ON N/C OFF
LED_PANIC The system has crashed N/C N/C N/C ON
LED_IDLE STM32 is is sleep mode (Optional, not used)
* If LED1, LED2, LED3 are statically on, then NuttX probably failed to boot
and these LEDs will give you some indication of where the failure was
** The normal state is LED3 ON and LED1 faintly glowing. This faint glow
is because of timer interrupts that result in the LED being illuminated
on a small proportion of the time.
*** LED2 may also flicker normally if signals are processed.
RGB LED Driver
==============
Alan Carvalho de Assis has used the STM32F4-Discovery to drive an RGB LED
using PWM output. The external RGB connected this way:
R = TIM1 CH1 on PE9
G = TIM2 CH2 on PA1
B = TIM3 CH3 on PB0
The RGB LED driver that uses PWM to control the red, green, and blue color
components can be enabled with the following configuration settings:
+CONFIG_RGBLED=y
+CONFIG_PWM
+CONFIG_STM32_TIM1
+CONFIG_STM32_TIM2
+CONFIG_STM32_TIM3
+CONFIG_STM32_TIM1_PWM=y
+CONFIG_STM32_TIM1_MODE=0
+CONFIG_STM32_TIM1_CHANNEL=1
+CONFIG_STM32_TIM1_CHMODE=0
+CONFIG_STM32_TIM2_PWM=y
+CONFIG_STM32_TIM2_MODE=0
+CONFIG_STM32_TIM2_CHANNEL=2
+CONFIG_STM32_TIM2_CHMODE=0
+CONFIG_STM32_TIM3_PWM=y
+CONFIG_STM32_TIM3_MODE=0
+CONFIG_STM32_TIM3_CHANNEL=3
+CONFIG_STM32_TIM3_CHMODE=0
PWM
===
The STM32F4Discovery has no real on-board PWM devices, but the board can be
configured to output a pulse train using TIM4 CH2 on PD3. This pin is
available next to the audio jack.
UARTs
=====
UART/USART PINS
---------------
USART1
CK PA8
CTS PA11*
RTS PA12*
RX PA10*, PB7
TX PA9*, PB6*
USART2
CK PA4*, PD7
CTS PA0*, PD3
RTS PA1, PD4*
RX PA3, PD6
TX PA2, PD5*
USART3
CK PB12, PC12*, PD10
CTS PB13, PD11
RTS PB14, PD12*
RX PB11, PC11, PD9
TX PB10*, PC10*, PD8
UART4
RX PA1, PC11
TX PA0*, PC10*
UART5
RX PD2
TX PC12*
USART6
CK PC8, PG7**
CTS PG13**, PG15**
RTS PG12**, PG8**
RX PC7*, PG9**
TX PC6, PG14**
* Indicates pins that have other on-board functions and should be used only
with care (See table 5 in the STM32F4Discovery User Guide). The rest are
free I/O pins.
** Port G pins are not supported by the MCU
Default USART/UART Configuration
--------------------------------
USART2 is enabled in most configurations (see */defconfig). RX and TX are
configured on pins PA3 and PA2, respectively (see include/board.h).
These pins selections, however, conflict with Ethernet pin usage on the
STM32F4DIS-BB base board. The STM32F4DIS-BB base board provides RS-232
drivers and a DB9 connector for USART6. USART6 is the preferred serial
console for use with the STM32F4DIS-BB.
Timer Inputs/Outputs
====================
TIM1
CH1 PA8, PE9
CH2 PA9*, PE11
CH3 PA10*, PE13
CH4 PA11*, PE14
TIM2
CH1 PA0*, PA15, PA5*
CH2 PA1, PB3*
CH3 PA2, PB10*
CH4 PA3, PB11
TIM3
CH1 PA6*, PB4, PC6
CH2 PA7*, PB5, PC7*
CH3 PB0, PC8
CH4 PB1, PC9
TIM4
CH1 PB6*, PD12*
CH2 PB7, PD13*
CH3 PB8, PD14*
CH4 PB9*, PD15*
TIM5
CH1 PA0*, PH10**
CH2 PA1, PH11**
CH3 PA2, PH12**
CH4 PA3, PI0
TIM8
CH1 PC6, PI5
CH2 PC7*, PI6
CH3 PC8, PI7
CH4 PC9, PI2
TIM9
CH1 PA2, PE5
CH2 PA3, PE6
TIM10
CH1 PB8, PF6
TIM11
CH1 PB9*, PF7
TIM12
CH1 PH6**, PB14
CH2 PC15, PH9**
TIM13
CH1 PA6*, PF8
TIM14
CH1 PA7*, PF9
* Indicates pins that have other on-board functions and should be used only
with care (See table 5 in the STM32F4Discovery User Guide). The rest are
free I/O pins.
** Port H pins are not supported by the MCU
Nintendo Wii Nunchuck:
======================
There is a driver on NuttX to support Nintendo Wii Nunchuck Joystick. If you
want to use it please select these options:
- Enable the I2C1 at System Type -> STM32 Peripheral Support, it will enable:
CONFIG_STM32_I2C1=y
- Enable to Custom board/driver initialization at RTOS Features -> RTOS hooks
CONFIG_BOARD_LATE_INITIALIZE=y
- Enable the I2C Driver Support at Device Drivers, it will enable this symbol:
CONFIG_I2C=y
- Nintendo Wii Nunchuck Joystick at Device Drivers -> [*] Input Device Support
CONFIG_INPUT=y
CONFIG_INPUT_NUNCHUCK=y
- Enable the Nunchuck joystick example at Application Configuration -> Examples
CONFIG_EXAMPLES_NUNCHUCK=y
CONFIG_EXAMPLES_NUNCHUCK_DEVNAME="/dev/nunchuck0"
You need to connect GND and +3.3V pins from Nunchuck connector to GND and 3V
of stm32f4discovery respectively (Nunchuck also can work connected to 5V, but
I don't recommend it). Connect I2C Clock from Nunchuck to SCK (PB6) and the
I2C Data to SDA (PB9).
Quadrature Encoder:
===================
The nsh configuration has been used to test the Quadrture Encoder
(QEncoder, QE) with the following modifications to the configuration
file:
- These setting enable support for the common QEncode upper half driver:
CONFIG_BOARD_LATE_INITIALIZE=y
CONFIG_SENSORS=y
CONFIG_SENSORS_QENCODER=y
- The timer 2 needs to be enabled:
CONFIG_STM32_TIM2=y
- This is a board setting that selected timer 2 for use with the
quadrature encode:
CONFIG_STM32F4DISCO_QETIMER=2
- These settings enable the STM32 Quadrature encoder on timer 2:
CONFIG_STM32_TIM2_QE=y
CONFIG_STM32_TIM4_QECLKOUT=2800000
CONFIG_STM32_QENCODER_FILTER=y
CONFIG_STM32_QENCODER_SAMPLE_EVENT_6=y
CONFIG_STM32_QENCODER_SAMPLE_FDTS_4=y
- These settings enable the test case at apps/examples/qencoder:
CONFIG_EXAMPLES_QENCODER=y
CONFIG_EXAMPLES_QENCODER_DELAY=100
CONFIG_EXAMPLES_QENCODER_DEVPATH="/dev/qe0"
In this configuration, the QEncoder inputs will be on the TIM2 inputs of
PA15 and PA1 (CH1 and CH2 respectively).
You can also use QEncoder with other timers, but keep in mind that only TIM2
and TIM5 are 32bits timers, all other timers are 16-bit then the QE counter
will overflow after 65535.
If TIM4 is selected, then PB6 and PB7 will be used for CH1 and CH2.
If TIM8 is selected, then PC6 and PI5 will be used for CH1 and CH2.
FPU
===
FPU Configuration Options
-------------------------
There are two version of the FPU support built into the STM32 port.
1. Non-Lazy Floating Point Register Save
In this configuration floating point register save and restore is
implemented on interrupt entry and return, respectively. In this
case, you may use floating point operations for interrupt handling
logic if necessary. This FPU behavior logic is enabled by default
with:
CONFIG_ARCH_FPU=y
2. Lazy Floating Point Register Save.
An alternative implementation only saves and restores FPU registers only
on context switches. This means: (1) floating point registers are not
stored on each context switch and, hence, possibly better interrupt
performance. But, (2) since floating point registers are not saved,
you cannot use floating point operations within interrupt handlers.
This logic can be enabled by simply adding the following to your .config
file:
CONFIG_ARCH_FPU=y
CONFIG_ARMV7M_LAZYFPU=y
CFLAGS
------
Only recent GCC toolchains have built-in support for the Cortex-M4 FPU. You will see
the following lines in each Make.defs file:
ifeq ($(CONFIG_ARCH_FPU),y)
ARCHCPUFLAGS = -mcpu=cortex-m4 -mthumb -march=armv7e-m -mfpu=fpv4-sp-d16 -mfloat-abi=hard
else
ARCHCPUFLAGS = -mcpu=cortex-m3 -mthumb -mfloat-abi=soft
endif
STM32F4DIS-BB
=============
On-board PIO usage:
---------- ------------- ------------------------------
PIO SIGNAL FUNCTION
---------- ------------- ------------------------------
PB11 TXEN LAN8720
PB12 TXD0
PB13 TXD1
PC4 RXD0/MODE0
PC5 RXD1/MODE1
PA7 RXDR/PHYAD0
PA2 MDIO
PC1 MDC
PA1 NINT/REFCLK0
PE2 NRST
---------- ------------- ------------------------------
PC6 D2 DCMI
PC7 D3
PE0 D4
PE1 D5
PE4 D6
PB6 D7
PE5 D8
PE6 D9
PA6 PCLK
PA4 HS
PB7 VS
PD6 PWR_EN
PD12 RST
PB9 SDA
PB8 SCL
---------- ------------- ------------------------------
USART6_TX T1IN SP3232EEY-L
USART6_RX T2OUT
---------- ------------- ------------------------------
PB15 NCD MicroSD
PC9 DAT1
PC8 DAT0
PC12 CLK
PD2 CMD
PC11 CD/DAT3
PC10 DAT2
---------- ------------- ------------------------------
RTC DS1307
==========
It is possible to use a low cost extern DS1307 RTC to keep date and time
always updated. These DS1307 RTC modules come with a 3V button battery, then
even when the board is turned OFF the Date/Time registers keep running.
You can connect the module this way (STM32F4Discovery to DS1307 board): GND
to GND; 5V to VCC; PB9 to SDA; PB6 to SCL. In the NuttX menuconfig you need
to enable these options:
System Type --->
STM32 Peripheral Support --->
[*] I2C1
Device Drivers --->
Timer Driver Support --->
[*] RTC Driver Support --->
-*- Date/Time RTC Support
[*] External RTC Support
[*] DS130x/DS323x RTC Driver
Maxim Integrated RTC (DS1307) --->
(100000) DS1307/DS323x I2C frequency
Application Configuration --->
NSH Library --->
Disable Individual commands --->
[ ] Disable date ( <-- Deselect )
It is also a good idea to enable the DEBUG to RTC initially, you will see:
ABCDF
stm32_ds1307_init: Initialize I2C1
stm32_ds1307_init: Bind the DS1307 RTC driver to I2C1
rtc_dumptime: Returning:
rtc_dumptime: tm_sec: 00000039
rtc_dumptime: tm_min: 00000001
rtc_dumptime: tm_hour: 00000009
rtc_dumptime: tm_mday: 00000016
rtc_dumptime: tm_mon: 00000008
rtc_dumptime: tm_year: 00000077
NuttShell (NSH)
nsh> date
Sep 22 09:01:58 2019
SSD1289
=======
I purchased an LCD display on eBay from China. The LCD is 320x240 RGB565 and
is based on an SSD1289 LCD controller and an XPT2046 touch IC. The pin out
from the 2x16 connect on the LCD is labelled as follows:
LCD CONNECTOR: SSD1289 MPU INTERFACE PINS:
+------+------+ DEN I Display enable pin
1 | GND | 3V3 | 2 VSYNC I Frame synchronization signal
+------+------+ HSYNC I Line synchronization signal
3 | D1 | D0 | 4 DOTCLK I Dot clock and OSC source
+------+------+ DC I Data or command
5 | D3 | D2 | 6 E (~RD) I Enable/Read strobe
+------+------+ R (~WR) I Read/Write strobe
7 | D5 | D4 | 8 D0-D17 IO For parallel mode, 8/9/16/18 bit interface
+------+------+ WSYNC O RAM write synchronizatin output
9 | D7 | D6 | 10 ~RES I System reset
+------+------+ ~CS I Chip select of serial interface
11 | D9 | D8 | 12 SCK I Clock of serial interface
+------+------+ SDI I Data input in serial mode
13 | D11 | D10 | 14 SDO O Data output in serial moce
+------+------+
15 | D13 | D12 | 16
+------+------+
17 | D15 | D14 | 18
+------+------+
19 | RS | CS | 20
+------+------+
21 | RD | WR | 22 NOTES:
+------+------+
23 |BL_CNT|RESET | 24 BL_CNT is the PWM backlight level control.
+------+------+
25 |TP_RQ |TP_S0 | 26 These pins are for the touch panel: TP_REQ
+------+------+ TP_S0, TP_SI, TP_SCX, and TP_CS
27 | NC |TP_SI | 28
+------+------+
29 | NC |TP_SCX| 30
+------+------+
31 | NC |TP_CS | 32
+------+------+
MAPPING TO STM32 F4:
---------------- -------------- ----------------------------------
STM32 FUNCTION LCD PIN STM32F4Discovery PIN
---------------- -------------- ----------------------------------
FSMC_D0 D0 pin 4 PD14 P1 pin 46 Conflict (Note 1)
FSMC_D1 D1 pin 3 PD15 P1 pin 47 Conflict (Note 2)
FSMC_D2 D2 pin 6 PD0 P2 pin 36 Free I/O
FSMC_D3 D3 pin 5 PD1 P2 pin 33 Free I/O
FSMC_D4 D4 pin 8 PE7 P1 pin 25 Free I/O
FSMC_D5 D5 pin 7 PE8 P1 pin 26 Free I/O
FSMC_D6 D6 pin 10 PE9 P1 pin 27 Free I/O
FSMC_D7 D7 pin 9 PE10 P1 pin 28 Free I/O
FSMC_D8 D8 pin 12 PE11 P1 pin 29 Free I/O
FSMC_D9 D9 pin 11 PE12 P1 pin 30 Free I/O
FSMC_D10 D10 pin 14 PE13 P1 pin 31 Free I/O
FSMC_D11 D11 pin 13 PE14 P1 pin 32 Free I/O
FSMC_D12 D12 pin 16 PE15 P1 pin 33 Free I/O
FSMC_D13 D13 pin 15 PD8 P1 pin 40 Free I/O
FSMC_D14 D14 pin 18 PD9 P1 pin 41 Free I/O
FSMC_D15 D15 pin 17 PD10 P1 pin 42 Free I/O
FSMC_A16 RS pin 19 PD11 P1 pin 27 Free I/O
FSMC_NE1 ~CS pin 10 PD7 P2 pin 27 Free I/O
FSMC_NWE ~WR pin 22 PD5 P2 pin 29 Conflict (Note 3)
FSMC_NOE ~RD pin 21 PD4 P2 pin 32 Conflict (Note 4)
PC6 RESET pin 24 PC6 P2 pin 47 Free I/O
Timer output BL_CNT pin 23 (to be determined)
---------------- -------------- ----------------------------------
1 Used for the RED LED
2 Used for the BLUE LED
3 Used for the RED LED and for OTG FS Overcurrent. It may be okay to use
for the parallel interface if PC0 is held high (or floating). PC0 enables
the STMPS2141STR IC power switch that drives the OTG FS host VBUS.
4 Also the reset pin for the CS43L22 audio Codec.
NOTE: The configuration to test this LCD configuration is available at
boards/arm/stm32/stm32f4discovery/nxlines. As of this writing, I have not seen the
LCD working so I probably have some things wrong.
I might need to use a bit-banging interface. Below is the pin configuration
of a similar LCD to support a (write-only), bit banging interface:
LCD PIN BOARD CONNECTION
LEDA 5V
VCC 5V
RD 3.3V
GND GND
DB0-7 Port C pins configured as outputs
DB8-15 Port A pins configured as outputs
RS Pin configured as output
WR Pin configured as output
CS Pin configured as output
RSET Pin configured as output
The following summarize the bit banging operations:
/* Rese the LCD */
void Reset(void)
{
Set RSET output
delay
Clear RSET output
delay
Set RSET output
}
/* Write 16-bits of whatever */
void Write16(uint8_t ms, uint8_t ls)
{
Set port A to ms
Set port B to ls
Clear WR pin
Set WR pin
}
/* Set the index register to an LCD register address */
void Index(uint8_t address)
{
Clear RS
Write16(0, address);
}
/* Write data to the LCD register or GRAM memory */
void WriteData(uin16_t data)
{
Set RS
Write16(data >> 8, data & 0xff);
}
/* Write to a register */
void WriteRegister(uint8_t address, uint16_t data)
{
Index(address);
WriteData(data);
}
UG-2864AMBAG01 / UG-2864HSWEG01
===============================
I purchased an OLED display on eBay. The OLED is 128x64 monochrome and
is based on an UG-2864AMBAG01 OLED controller. The OLED can run in either
parallel or SPI mode. I am using SPI mode. In SPI mode, the OLED is
write only so the driver keeps a 128*64/8 = 1KB framebuffer to remember
the display contents:
Here is how I have the OLED connected. But you can change this with the
settings in include/board.h and src/stm324fdiscovery.h. Connector
pinout for the UG-2864AMBAG01 is specific to the theO.net display board
that I am using:
--------------------------+----------------------------------------------
Connector CON10 J1: | STM32F4Discovery
--------------+-----------+----------------------------------------------
CON10 J1: | CON20 J2: | P1/P2:
--------------+-----------+----------------------------------------------
1 3v3 | 3,4 3v3 | P2 3V
3 /RESET | 8 /RESET | P2 PB6 (Arbitrary selection)
5 /CS | 7 /CS | P2 PB7 (Arbitrary selection)
7 A0 | 9 A0 | P2 PB8 (Arbitrary selection)
9 LED+ (N/C) | ----- | -----
2 5V Vcc | 1,2 Vcc | P2 5V
4 DI | 18 D1/SI | P1 PA7 (GPIO_SPI1_MOSI == GPIO_SPI1_MOSI_1 (1))
6 SCLK | 19 D0/SCL | P1 PA5 (GPIO_SPI1_SCK == GPIO_SPI1_SCK_1 (1))
8 LED- (N/C) | ----- | ------
10 GND | 20 GND | P2 GND
--------------+-----------+----------------------------------------------
(1) Required because of on-board MEMS
-------------------------------------------------------------------------
Darcy Gong recently added support for the UG-2864HSWEG01 OLED which is also
an option with this configuration. I have little technical information about
the UG-2864HSWEG01 interface (see boards/arm/stm32/stm32f4discovery/src/up_ug2864hsweg01.c).
NiceRF LoRa (2AD66-LoRa V2)
===========================
It is possible to wire an external LoRa module to STM32F4Discovery board.
First connect the GND and VCC (to 3.3V) and then connect the SCK label to PA5,
connect the MISO to PA6, connect the MOSI to PA7, connect the NSS to PD8,
connect DIO0 to PD0 and finally connect NRESET to PD4.
Ethernet SPI Module ENC28J60
============================
You can use an external Ethernet SPI Module ENC28J60 with STM32F4Discovery board.
First connect the GND and VCC (to 3.3V). Note: according with ENC28J60 datasheet
the Operating Voltage should be between 3.1V to 3.6V, but STM32F4Discover only
supply 3.0V. You can modify your board to supply 3.3V: just remove the D3 diode
and short-circuit the board pads where it was soldered).
Connect the SCK label to PA5, connect the SO to PA6, connect the SI to PA7,
connect the CS to PA4, connect RST to PE1 and finally connect INT to PE4.
The next step is to enable the ENC28J60 in the menuconfig ("make menuconfig")
and the necessary Network configuration, you can use the
boards/arm/stm32/fire-stm32v2/configs/nsh/defconfig as reference.
HCI UART
========
BT860
-----
I have been testing with the DVK_BT960_SA board via J10 as follows:
DVK_BT860-SA J10 STM32F4 Discovery P1
pin 1 GND P1 pin 49
pin 2 Module_RTS_O USART3_CTS PB13, P1 pin 37
pin 3 N/C
pin 4 Module_RX_I USART3_TXD PB10, P1 pin 34
pin 5 Module_TX_O USART3_RX PB11, P1 pin 35
pin 6 Module_CTS_I USART3_RTS PB14, P1 pin 38
Due to conflicts, USART3 many not be used if Ethernet is enabled with
the STM32F4DIS-BB base board:
PB-11 conflicts with Ethernet TXEN
PB-13 conflicts with Ethernet TXD1
If you need to use the HCI uart with Ethernet, then you will need to
configure a new U[S]ART and/or modify the pin selections in
include/board.h.
CC2564
------
[To be provided]
One confusing thing compared with the BT860 is in the naming of the pins
at the 4-pin RS232 TTL interface: The BT860 uses BT860-centric naming,
the Rx pin is for BT860 receive and needs to connect with the STM32 Tx
pin, the Tx pin is for BT860 transmit an needs to be connected with the
STM32 Rx pin, etc. The CC2564, on the hand, uses host-centric naming so
that the CC2564 Rx pin connects to the STM32 Rx pin, Tx to Tx pin, etc.
Troubleshooting
---------------
First you should enable CONFIG_DEBUG_WIRELESS_ERR, WARN, and INFO options
so that you can see what the driver is doing.
The bring-up problems that I encountered mostly involved setting up the
4-wire UART interface: Remember to cross Rx/Tx and RTS/CTS. The active
state for RTS and CTS is low. For bringup of the BT860, I used a Seleae
logic analyzer connected to the Tx, Rx, RTS, and CTS pins. When the
BT860 is working correctly you would see this:
1. All signals high initially,
2. When NuttX starts, RTS goes low
3. The BT860 sees RTS go low and responds by setting CTS low after a
delay. This is when it selects between USB and UART.
4. After another delay, the STM32 sends the 4 Tx bytes.
5. The BT860 responds with 3 bytes.
6. If successful, additional commands and responses follow.
Some of these steps may be different for other HCI UARTs. Steps 4-5 are
the reset sequence. the 4 Tx bytes comes from the code in the function
hci_initialize() in the file wireless/bluetooth/bt_hcicore.c:
/* Send HCI_RESET */
bt_hci_cmd_send(BT_HCI_OP_RESET, NULL);
The code is actually working one command ahead. It has already queued up
the reset command and is requesting the HCI UART device features while the
reset command is being sent:
ret = bt_hci_cmd_send_sync(BT_HCI_OP_READ_LOCAL_FEATURES, NULL, &rsp);
if (ret < 0)
{
wlerr("ERROR: bt_hci_cmd_send_sync failed: %d\n", ret);
return ret;
}
A common failure is to see a timeout error (-116) due to a Tx flow control
failure (CTS is high). There is no timeout on the first command, the
timeout actually occurs on the second command in bt_hci_cmd_send_sync():
do
{
/* The timed wait could also be awakened by a signal */
ret = nxsem_timedwait(&sync_sem, &abstime);
}
while (ret == -EINTR);
The above times out and generates the 116 error.
In the case of the timeout, the second command is stuck in the message queue
is never processed because the Tx thread is waiting for the BT_HCI_OP_RESET
command to complete. It is blocked in hci_tx_thread() kernel thread.
The Tx occurs on a kernel thread. The Tx send of the first command causes
the hci_tx_kthread() to block. It waits here until what the HCI UART
receives the command and responses with the command complete event:
/* Wait until ncmd > 0 */
do
{
ret = nxsem_wait(&g_btdev.ncmd_sem);
}
while (ret == -EINTR);
bt_hci_cmd_send() will block on the first BT_HCI_OP_RESET until until it
gets the 3-byte event (BT_EVT) that indicates that the command was
completed and provides the command status. See the function
hci_command_complete() where it posts g_btdev.ncmd_sem.
g_btdev.ncmd = 1;
nxsem_post(&g_btdev.ncmd_sem);
You can see such a hange in the wireless debug output
bt_hci_cmd_send: opcode 0c03 len 3 <<< BT_HCI_OP_RESET command is queue
hci_tx_kthread: Sending command 0c03 buf 20002a40 to driver <<< Sent to driver from the Tx thread
hciuart_write: config 801d924 buffer 20002760 buflen 4 <<< Goes to STM32 HCI UART driver
bt_hci_cmd_send_sync: opcode 1003 len 3 <<< next command is queued.
hciuart_copytotxfifo: txhead 1 txtail 4 nbytes 1 <<< One byte of first command written to Tx HR
hciuart_enableints: CR1 000020ac CR2 00000301 <<< Tx interrupts enabled
!!!! No Tx interrupts, probably because of Tx flow control (CTS is high) !!!
hci_initialize: ERROR: bt_hci_cmd_send_sync failed: -116 <<< Times out on second message
STM32F4Discovery-specific Configuration Options
===============================================
CONFIG_ARCH - Identifies the arch/ subdirectory. This should
be set to:
CONFIG_ARCH=arm
CONFIG_ARCH_family - For use in C code:
CONFIG_ARCH_ARM=y
CONFIG_ARCH_architecture - For use in C code:
CONFIG_ARCH_CORTEXM4=y
CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
CONFIG_ARCH_CHIP=stm32
CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
chip:
CONFIG_ARCH_CHIP_STM32F407VG=y
CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG - Enables special STM32 clock
configuration features.
CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG=n
CONFIG_ARCH_BOARD - Identifies the boards/ subdirectory and
hence, the board that supports the particular chip or SoC.
CONFIG_ARCH_BOARD=STM32F4Discovery (for the STM32F4Discovery development board)
CONFIG_ARCH_BOARD_name - For use in C code
CONFIG_ARCH_BOARD_STM32F4_DISCOVERY=y
CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
of delay loops
CONFIG_ENDIAN_BIG - define if big endian (default is little
endian)
CONFIG_RAM_SIZE - Describes the installed RAM
CONFIG_RAM_SIZE=0x00010000 (64Kb)
CONFIG_RAM_START - The start address of installed RAM
CONFIG_RAM_START=0x20000000
CONFIG_STM32_CCMEXCLUDE - Exclude CCM SRAM from the HEAP
CONFIG_ARCH_FPU - The STM32F4Discovery supports a floating point unit (FPU)
CONFIG_ARCH_FPU=y
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
have LEDs
CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
stack. If defined, this symbol is the size of the interrupt
stack in bytes. If not defined, the user task stacks will be
used during interrupt handling.
CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture.
Individual subsystems can be enabled:
AHB1
----
CONFIG_STM32_CRC
CONFIG_STM32_BKPSRAM
CONFIG_STM32_CCMDATARAM
CONFIG_STM32_DMA1
CONFIG_STM32_DMA2
CONFIG_STM32_ETHMAC
CONFIG_STM32_OTGHS
AHB2
----
CONFIG_STM32_DCMI
CONFIG_STM32_CRYP
CONFIG_STM32_HASH
CONFIG_STM32_RNG
CONFIG_STM32_OTGFS
AHB3
----
CONFIG_STM32_FSMC
APB1
----
CONFIG_STM32_TIM2
CONFIG_STM32_TIM3
CONFIG_STM32_TIM4
CONFIG_STM32_TIM5
CONFIG_STM32_TIM6
CONFIG_STM32_TIM7
CONFIG_STM32_TIM12
CONFIG_STM32_TIM13
CONFIG_STM32_TIM14
CONFIG_STM32_WWDG
CONFIG_STM32_IWDG
CONFIG_STM32_SPI2
CONFIG_STM32_SPI3
CONFIG_STM32_USART2
CONFIG_STM32_USART3
CONFIG_STM32_UART4
CONFIG_STM32_UART5
CONFIG_STM32_I2C1
CONFIG_STM32_I2C2
CONFIG_STM32_I2C3
CONFIG_STM32_CAN1
CONFIG_STM32_CAN2
CONFIG_STM32_DAC1
CONFIG_STM32_DAC2
CONFIG_STM32_PWR -- Required for RTC
APB2
----
CONFIG_STM32_TIM1
CONFIG_STM32_TIM8
CONFIG_STM32_USART1
CONFIG_STM32_USART6
CONFIG_STM32_ADC1
CONFIG_STM32_ADC2
CONFIG_STM32_ADC3
CONFIG_STM32_SDIO
CONFIG_STM32_SPI1
CONFIG_STM32_SYSCFG
CONFIG_STM32_TIM9
CONFIG_STM32_TIM10
CONFIG_STM32_TIM11
Timer devices may be used for different purposes. One special purpose is
to generate modulated outputs for such things as motor control. If CONFIG_STM32_TIMn
is defined (as above) then the following may also be defined to indicate that
the timer is intended to be used for pulsed output modulation, ADC conversion,
or DAC conversion. Note that ADC/DAC require two definition: Not only do you have
to assign the timer (n) for used by the ADC or DAC, but then you also have to
configure which ADC or DAC (m) it is assigned to.
CONFIG_STM32_TIMn_PWM Reserve timer n for use by PWM, n=1,..,14
CONFIG_STM32_TIMn_ADC Reserve timer n for use by ADC, n=1,..,14
CONFIG_STM32_TIMn_ADCm Reserve timer n to trigger ADCm, n=1,..,14, m=1,..,3
CONFIG_STM32_TIMn_DAC Reserve timer n for use by DAC, n=1,..,14
CONFIG_STM32_TIMn_DACm Reserve timer n to trigger DACm, n=1,..,14, m=1,..,2
For each timer that is enabled for PWM usage, we need the following additional
configuration settings:
CONFIG_STM32_TIMx_CHANNEL - Specifies the timer output channel {1,..,4}
NOTE: The STM32 timers are each capable of generating different signals on
each of the four channels with different duty cycles. That capability is
not supported by this driver: Only one output channel per timer.
JTAG Enable settings (by default only SW-DP is enabled):
CONFIG_STM32_JTAG_FULL_ENABLE - Enables full SWJ (JTAG-DP + SW-DP)
CONFIG_STM32_JTAG_NOJNTRST_ENABLE - Enables full SWJ (JTAG-DP + SW-DP)
but without JNTRST.
CONFIG_STM32_JTAG_SW_ENABLE - Set JTAG-DP disabled and SW-DP enabled
STM32F4Discovery specific device driver settings
CONFIG_U[S]ARTn_SERIAL_CONSOLE - selects the USARTn (n=1,2,3) or UART
m (m=4,5) for the console and ttys0 (default is the USART1).
CONFIG_U[S]ARTn_RXBUFSIZE - Characters are buffered as received.
This specific the size of the receive buffer
CONFIG_U[S]ARTn_TXBUFSIZE - Characters are buffered before
being sent. This specific the size of the transmit buffer
CONFIG_U[S]ARTn_BAUD - The configure BAUD of the UART. Must be
CONFIG_U[S]ARTn_BITS - The number of bits. Must be either 7 or 8.
CONFIG_U[S]ARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
CONFIG_U[S]ARTn_2STOP - Two stop bits
STM32F4Discovery CAN Configuration
CONFIG_CAN - Enables CAN support (one or both of CONFIG_STM32_CAN1 or
CONFIG_STM32_CAN2 must also be defined)
CONFIG_CAN_EXTID - Enables support for the 29-bit extended ID. Default
Standard 11-bit IDs.
CONFIG_CAN_FIFOSIZE - The size of the circular buffer of CAN messages.
Default: 8
CONFIG_CAN_NPENDINGRTR - The size of the list of pending RTR requests.
Default: 4
CONFIG_CAN_LOOPBACK - A CAN driver may or may not support a loopback
mode for testing. The STM32 CAN driver does support loopback mode.
CONFIG_STM32_CAN1_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN1
is defined.
CONFIG_STM32_CAN2_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN2
is defined.
CONFIG_STM32_CAN_TSEG1 - The number of CAN time quanta in segment 1.
Default: 6
CONFIG_STM32_CAN_TSEG2 - the number of CAN time quanta in segment 2.
Default: 7
CONFIG_STM32_CAN_REGDEBUG - If CONFIG_DEBUG_FEATURES is set, this will generate an
dump of all CAN registers.
STM32F4Discovery SPI Configuration
CONFIG_STM32_SPI_INTERRUPTS - Select to enable interrupt driven SPI
support. Non-interrupt-driven, poll-waiting is recommended if the
interrupt rate would be to high in the interrupt driven case.
CONFIG_STM32_SPI_DMA - Use DMA to improve SPI transfer performance.
Cannot be used with CONFIG_STM32_SPI_INTERRUPT.
STM32F4Discovery DMA Configuration
CONFIG_SDIO_DMA - Support DMA data transfers. Requires CONFIG_STM32_SDIO
and CONFIG_STM32_DMA2.
CONFIG_STM32_SDIO_PRI - Select SDIO interrupt priority. Default: 128
CONFIG_STM32_SDIO_DMAPRIO - Select SDIO DMA interrupt priority.
Default: Medium
CONFIG_STM32_SDIO_WIDTH_D1_ONLY - Select 1-bit transfer mode. Default:
4-bit transfer mode.
STM32 USB OTG FS Host Driver Support
Pre-requisites
CONFIG_USBDEV - Enable USB device support
CONFIG_USBHOST - Enable USB host support
CONFIG_STM32_OTGFS - Enable the STM32 USB OTG FS block
CONFIG_STM32_SYSCFG - Needed
CONFIG_SCHED_WORKQUEUE - Worker thread support is required
Options:
CONFIG_STM32_OTGFS_RXFIFO_SIZE - Size of the RX FIFO in 32-bit words.
Default 128 (512 bytes)
CONFIG_STM32_OTGFS_NPTXFIFO_SIZE - Size of the non-periodic Tx FIFO
in 32-bit words. Default 96 (384 bytes)
CONFIG_STM32_OTGFS_PTXFIFO_SIZE - Size of the periodic Tx FIFO in 32-bit
words. Default 96 (384 bytes)
CONFIG_STM32_OTGFS_DESCSIZE - Maximum size of a descriptor. Default: 128
CONFIG_STM32_OTGFS_SOFINTR - Enable SOF interrupts. Why would you ever
want to do that?
CONFIG_STM32_USBHOST_REGDEBUG - Enable very low-level register access
debug. Depends on CONFIG_DEBUG_FEATURES.
CONFIG_STM32_USBHOST_PKTDUMP - Dump all incoming and outgoing USB
packets. Depends on CONFIG_DEBUG_FEATURES.
BASIC
=====
I have used the stm32f4discovery/nsh configuration to test Michael Haardt's
BASIC interpreter that you can find at apps/interpreters/bas.
Bas is an interpreter for the classic dialect of the programming language
BASIC. It is pretty compatible to typical BASIC interpreters of the 1980s,
unlike some other UNIX BASIC interpreters, that implement a different
syntax, breaking compatibility to existing programs. Bas offers many ANSI
BASIC statements for structured programming, such as procedures, local
variables and various loop types. Further there are matrix operations,
automatic LIST indentation and many statements and functions found in
specific classic dialects. Line numbers are not required.
There is also a test suite for the interpreter that can be found at
apps/examples/bastest.
Configuration
-------------
Below are the recommended configuration changes to use BAS with the
stm32f4discovery/nsh configuration:
Dependencies:
CONFIG_LIBC_EXECFUNCS=y : exec*() functions are required
CONFIG_LIBM=y : Some floating point library is required
CONFIG_LIBC_FLOATINGPOINT=y : Floating point printing support is required
CONFIG_LIBC_TMPDIR="/tmp" : Writable temporary files needed for some commands
CONFIG_FS_FAT=y : With FAT you create a RAMDISK at /tmp
CONFIG_FAT_LFN=y : FAT is difficult to use with long file names
Enable the BASIC interpreter. Other default options should be okay:
CONFIG_INTERPRETERS_BAS=y : Enables the interpreter
CONFIG_INTERPRETER_BAS_VT100=y
The BASIC test suite can be included:
CONFIG_FS_ROMFS=y : ROMFS support is needed
CONFIG_EXAMPLES_BASTEST=y : Enables the BASIC test setup
CONFIG_EXAMPLES_BASTEST_DEVMINOR=0
CONFIG_EXAMPLES_BASTEST_DEVPATH="/dev/ram0"
Usage
-----
This setup will initialize the BASIC test (optional): This will mount
a ROMFS file system at /mnt/romfs that contains the BASIC test files:
nsh> bastest
Registering romdisk at /dev/ram0
Mounting ROMFS filesystem at target=/mnt/romfs with source=/dev/ram0
nsh>
These steps will create and mount a RAMDISK at /tmp (required only for a
few BASIC commands). This will create a RAMDISK device at /dev/ram1 with
size = 512 * 64 = 32KiB and mount it at /tmp:
nsh> mkrd -m 1 -s 512 64
nsh> mkfatfs /dev/ram1
nsh> mount -t vfat /dev/ram1 /tmp
nsh>
The interactive interpreter is started like:
nsh> bas
bas 2.4
Copyright 1999-2014 Michael Haardt.
This is free software with ABSOLUTELY NO WARRANTY.
>
Ctrl-D exits the interpreter.
The test programs can be ran like this:
nsh> bastest
Registering romdisk at /dev/ram0
Mounting ROMFS filesystem at target=/mnt/romfs with source=/dev/ram0
nsh> bas /mnt/romfs/test01.bas
1
hello
0.0002
0.0000020
0.0000002
nsh>
Or you can load a test into memory and execute it interactively:
nsh> bas
bas 2.4
Copyright 1999-2014 Michael Haardt.
This is free software with ABSOLUTELY NO WARRANTY.
> load "/mnt/romfs/test01.bas"
> run
1
hello
0.0002
0.0000020
0.0000002
>
Testing LLVM LIBC++ with NuttX
==============================
You can use LLVM LIBC++ on NuttX to get a C++ compiler with C++11 features.
Follow these steps to get it working:
Clone the needed repositories:
$ git clone https://www.bitbucket.org/acassis/libcxx
$ git clone https://www.bitbucket.org/nuttx/apps
$ git clone https://www.bitbucket.org/nuttx/nuttx
Install the libcxx files on NuttX:
$ cd libcxx
$ ./install.sh ../nuttx
Installing LLVM/libcxx in the NuttX source tree
Installation succeeded
Enter inside NuttX and compile it:
$ cd ../nuttx
$ tools/configure.sh stm32f4discovery:testlibcxx
Copy files
Refreshing...
$ ls -l nuttx.bin
-rwxrwxr-x 1 alan alan 58112 Ago 8 11:08 nuttx.bin
Plug the MiniUSB cable in the STM32F4Discovery board and flash the firmware:
$ sudo openocd -f interface/stlink-v2.cfg -f target/stm32f4x.cfg -c init \
-c "reset halt" -c "flash write_image erase nuttx.bin 0x08000000"
...
Info : device id = 0x10036413
Info : flash size = 1024kbytes
target halted due to breakpoint, current mode: Thread
xPSR: 0x61000000 pc: 0x20000046 msp: 0x20001d60
wrote 65536 bytes from file nuttx.bin in 2.959432s (21.626 KiB/s)
Connect the USB/Serial 3.3V dongle to PA2(board TX) and PA3(board RX) use
minicom or other serial console configured to 115200 8n1.
Press Reset pin of the board and you will see:
NuttShell (NSH)
nsh> ?
help usage: help [-v] [<cmd>]
[ cmp free mh source usleep
? dirname help mv sleep xd
basename dd hexdump mw test
break echo kill pwd time
cat exec ls rm true
cd exit mb rmdir uname
cp false mkdir set unset
Builtin Apps:
helloxx
nsh>
Just type helloxx:
nsh> helloxx
helloxx_main: Saying hello from the dynamically constructed instance
CHelloWorld::HelloWorld: Hello, World!!
helloxx_main: Saying hello from the instance constructed on the stack
CHelloWorld::HelloWorld: Hello, World!!
helloxx_main: Saying hello from the statically constructed instance
CHelloWorld::HelloWorld: Hello, World!!
nsh>
Configurations
==============
Common Information
------------------
Each STM32F4Discovery configuration is maintained in a sub-directory and
can be selected as follow:
tools/configure.sh STM32F4Discovery:<subdir>
Where <subdir> is one of the sub-directories listed in the next paragraph
NOTES (common for all configurations):
1. This configuration uses the mconf-based configuration tool. To
change this configuration using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
Configuration Sub-directories
-------------------------
audio:
-----
This configuration is a variant of the NSH configuration used for
demonstrating PCM audio using the CS43L22 stereo DAC/amplifier on board
the STM32F4 Discovery and the STM32 I2S DMA interface. It uses the
file player at apps/system/nxplayer. The serial console is on USART2.
The original CS43L22 and STM32 I2S drivers were contribued by Taras
Drozdovsky in May of 2017. The audio configuration was contributed by
Alan Carvalho de Assis and derives, in part, from the work of Taras at
https://github.com/tdrozdovskiy/CS43L22-Audio-driver.
Usage instructions from the README file at the location:
1. Prepare USB flash storage. This configuration depends on .WAV files
provided to the system via a USB flash stick. There are some sample
audio files at https://github.com/tdrozdovskiy/CS43L22-Audio-driver
and these steps will put those sample .WAV files onto the USB flash:
a. Format the USB flash storage into FAT. For example by next command
$ mkfs.vfat /dev/sdb1
b. Create folder /music
$ mkdir music
c. Copy files from /audio_samples/ to /music folder of USB flash storage
$ cp <repo>/audio_samples/* /mnt/media/music/
You should be able to use either Taras' .wav files like that or, if
you like, your own compatible .wav files.
2. Example usage CS43L22 Audio driver
a. Power On or reset the STM32F4 Discovery board. We can see the NuttX
command line prompt:
NuttShell (NSH)
nsh>
b. Mount the usb flash device into our file system
nsh> mount -t vfat /dev/sda/ /mnt/sda
c. Start the NxPlayer program and Enter the help command to view the list
of commands
nsh> nxplayer
NxPlayer version 1.04
h for commands, q to exit
nxplayer> h
NxPlayer commands
================
balance d% : Set balance percentage (< 50% means more left)
device devfile : Specify a preferred audio device
h : Display help for commands
help : Display help for commands
mediadir path : Change the media directory
play filename : Play a media file
pause : Pause playback
resume : Resume playback
stop : Stop playback
tone freq secs : Produce a pure tone
q : Exit NxPlayer
quit : Exit NxPlayer
volume d% : Set volume to level specified
d. Play the test sample track (cu44k.wav - 44100Hz, 16bit, stereo).
nxplayer> play cu44k.wav
e. Set the volume value to 50%.
nxplayer> volume 50
f. Stop the current track and play another one
nxplayer> stop
nxplayer> play hn.wav
cxxtest:
-------
The C++ standard library test at apps/testing/cxxtest configuration. This
test is used to verify the uClibc++ port to NuttX. This configuration may
be selected as follows:
tools/configure.sh sim:cxxtest
NOTES:
1. Before you can use this example, you must first install the uClibc++
C++ library. This is located outside of the NuttX source tree in the
NuttX uClibc++ GIT repository. See the README.txt file there for
instructions on how to install uClibc++
2. Ideally, you should build with a toolchain based on GLIBC or
uClibc++. It you use a toolchain based on newlib, you may see
an error like the following:
.../lib/libsupc++.a(vterminate.o): In function `__gnu_cxx::__verbose_terminate_handler()':
vterminate.cc:(....): undefined reference to `_impure_ptr'
Here is a quick'n'dirty fix:
1. Get the directory where you can find libsupc++:
arm-none-eabi-gcc -mcpu=cortex-m4 -mthumb -print-file-name=libsupc++.a
2. Go to that directory and save a copy of vterminate.o (in case you
want to restore it later:
cd <the-directory-containing-libsupc++.a>
arm-none-eabi-ar.exe -x libsupc++.a vterminate.o
3. Then remove vterminate.o from the library. At build time, the
uClibc++ package will provide a usable replacement vterminate.o.
Steps 2 and 3 will require root privileges on most systems (not Cygwin).
Now NuttX should link with no problem. If you want to restore the
vterminate.o that you removed from libsupc++, you can do that with:
arm-none-eabi-ar.exe rcs libsupc++.a vterminate.o
3. Exceptions are enabled and workking (CONFIG_CXX_EXCEPTION=y)
elf:
---
This configuration uses apps/examples/elf in order to test the ELF
loader.
NOTES:
1. Default platform/toolchain:
CONFIG_HOST_WINDOWS=y : Windows
CONFIG_WINDOWS_CYGWIN=y : Cygwin environment on Windows
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for Windows
2. By default, this project assumes that you are *NOT* using the DFU
bootloader.
3. It appears that you cannot execute from CCM RAM. This is why the
following definition appears in the defconfig file:
CONFIG_STM32_CCMEXCLUDE=y
4. This configuration requires that you have the genromfs tool installed
on your system and that you have the full path to the installed genromfs
executable in PATH variable (see apps/examples/README.txt)
5. This configuration can be extended to use the hello++4 example and to
build uClibc with the following additions to the configuration file
(from Leo aloe3132):
CONFIG_C99_BOOL8=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_UCLIBCXX=y
CONFIG_CXX_EXCEPTION=y
CONFIG_CXX_LIBSUPCXX=y
CONFIG_UCLIBCXX_BUFSIZE=32
CONFIG_EXAMPLES_ELF_CXX=y
6. By default, this configuration uses the ROMFS file system. It can also
be modified to use the compressed CROMFS:
-CONFIG_PATH_INITIAL="/mnt/romfs"
+CONFIG_PATH_INITIAL="/mnt/cromfs"
-CONFIG_FS_ROMFS=y
+CONFIG_FS_CROMFS=y
-CONFIG_EXAMPLES_ELF_ROMFS=y
+CONFIG_EXAMPLES_ELF_CROMFS=y
7. The network initialization thread is enabled in this configuration.
As a result, networking initialization is performed asynchronously with
NSH bring-up.
The network monitor is not enabled in this configuration, however, so
the firmware will not know when the network is disconnected or
reconnected. The NSH Network Monitor cannot be used with the
STM32F4DIS-BB base board because the LAN8720 is configured in REF_CLK
OUT mode. In that mode, the PHY interrupt is not supported. The NINT
pin serves as REFLCK0 in that case.
hciuart:
-------
This configuration was used for test the HCI UART driver. The HCI UART
is enabled on USART3 as well as the test application at
apps/wireless/bluetoot/btsak.
NOTES:
1. This configuration assumes that that you are using the STM32F4DIS-BB
base board with serial console on USART6. If you are not using the
STM32F4DIS-BB, then you will want to disable support for the base
board.
-CONFIG_STM32F4DISBB=y
+# CONFIG_STM32F4DISBB is not set
You may also want to reconfigure the serial console to USART1.
2. The HCI UART is assumed to connect to the UART3 on the following pins:
USART3 TX : PB10
USART3 RX : PB11
USART3 CTS: PB13
USART3 RTS: PB14
The HCI UART selection can be changed by re-configuring and assigning
the different U[S]ART to the HCI. The U[S]ART pin selections can be
changed by modifying the disambiguation definitions in
boards/arm/stm32/stm32f4discovery/include/board.h
I have been testing with the DVK_BT960_SA board via J10 as follows:
DVK_BT860-SA J10 STM32F4 Discovery P1
pin 1 GND P1 pin 49
pin 2 Module_RTS_O USART3_CTS PB13, P1 pin 37
pin 3 N/C
pin 4 Module_RX_I USART3_TXD PB10, P1 pin 34
pin 5 Module_TX_O USART3_RX PB11, P1 pin 35
pin 6 Module_CTS_I USART3_RTS PB14, P1 pin 38
NOTICE that the BT860 uses BT860-centric naming, the Rx pin is for
BT860 receive and needs to connect with the STM32 Tx pin, the Tx pin
is for BT860 transmit an needs to be connected with the STM32 Rx pin,
etc. Other parts may use host-centric naming so that the HCI UART Rx
pin connects to the STM32 Rx pin, Tx to Tx pin, etc.
3. Due to conflicts, USART3 many not be used if Ethernet is enabled with
the STM32F4DIS-BB base board:
PB-11 conflicts with Ethernet TXEN
PB-13 conflicts with Ethernet TXD1
If you need to use the HCI uart with Ethernet, then you will need to
configure a new U[S]ART and/or modify the pin selections in
include/board.h.
4. Stack sizes are large and non-optimal. Don't judge memory usage
without tuning.
5. I tested using the Laird DVK_BT860. The BT860 defaults to 115200
BAUD but is capable of transfers up to 4M. The documentation says
that the part supports auto baudrate detection, but I have found no
documentation on how to use that.
Currently the "generic" HCI UART upper half is used with the BT860
and that upper half driver supports only a fixed (but configurable
BAUD) is used and this must be set to the BT860 default (115200).
A custom BT860 upper half driver is needed that can use vendor
specific command: Baud rate can be set with such a vendor-specific
command. Ideally, the sequence would be: (1) start at default baud
rate, (2) get local version info, (3) send the vendor-specific baud
rate change command, (4) wait for response, and (5) set the local
UART to the matching, higher baud rate.
The custom, vendor-specific BT860 command is:
{0x18, 0xfc, 0x06, 0x00, 0x00, NN, NN, NN, NN}
where {NN, NN, NN, NN} is the requested baud in little endian byte order.
If an initialization script is used then (5) then send initialization
scripts script. After sending the last command from the
initialization script, (6) reset the local UART. Finally, (7) send
vendor-specific baud rate change command, (8) wait for response, and
(9) set local UART to high baud rate.
The command to write the initialization script into NVRAM is another
story for another time and another place.
If you use a different HCI UART, you will need to modify this setting:
CONFIG_BLUETOOTH_UART_GENERIC=y
and you may have to add some support in drivers/wireless/bluetooth.
ipv6:
----
This is another version of the NuttShell configuration for the
STM32F4-Discovery with the STM32F4DIS-BB base board. It is very similar
to the netnsh configuration except that it has IPv6 enabled and IPv4
disabled. Several network utilities that are not yet available when
IPv6 is disabled.
NOTES:
1. As of 2015-02-05, this configuration was identical to the netnsh
configuration other than using IPv6. So all of the notes above
regarding the netnsh configuration apply.
a. Telnet does work with IPv6 but is not enabled in this
configuration (but could be).
b. The network initialization thread was enabled in the netnsh
configuration on 2015-09-28, but not in the ipv6 configuration.
2. This configuration can be modified to that both IPv4 and IPv6
are support. Here is a summary of the additional configuration
settings required to support both IPv4 and IPv6:
CONFIG_NET_IPv4=y
CONFIG_NET_ARP=y
CONFIG_NET_ARP_SEND=y (optional)
CONFIG_NET_ICMP=y
CONFIG_NET_ICMP_SOCKET=y
CONFIG_NETDB_DNSCLIENT=y
CONFIG_NETUTILS_TELNETD=y
CONFIG_NSH_IPADDR=0x0a000002
CONFIG_NSH_DRIPADDR=0x0a000001
CONFIG_NSH_NETMASK=0xffffff00
CONFIG_NSH_TELNET=y
Then from NSH, you have both ping and ping6 commands:
nsh> ping 10.0.0.1
nsh> ping6 fc00::1
And from the host you can do similar:
ping 10.0.0.2
ping6 fc00::2 (Linux)
ping -6 fc00::2 (Windows cmd)
and Telnet is now enabled and works from the host... but only using
IPv6 addressing:
telnet fc00::2
That is because the Telnet daemon will default to IPv6 and there is
no Telnet option to let you select which if both IPv4 and IPv6 are
enabled.
3. I have used this configuration to serve up IP address prefixes
in a local network with these modifications to the configuration:
+CONFIG_NET_ICMPv6_ROUTER=y
+CONFIG_NET_ICMPv6_PREFLEN=64
+CONFIG_NET_ICMPv6_PREFIX_1=0xfc00
+CONFIG_NET_ICMPv6_PREFIX_2=0x0000
+CONFIG_NET_ICMPv6_PREFIX_3=0x0000
+CONFIG_NET_ICMPv6_PREFIX_4=0x0000
+CONFIG_NET_ICMPv6_PREFIX_5=0x0000
+CONFIG_NET_ICMPv6_PREFIX_6=0x0000
+CONFIG_NET_ICMPv6_PREFIX_7=0x0000
+CONFIG_NET_ICMPv6_PREFIX_8=0x0000
+CONFIG_NSH_IPv6NETMASK_5=0x0000
-CONFIG_NSH_IPv6NETMASK_5=0xffff
+CONFIG_NSH_IPv6NETMASK_6=0x0000
-CONFIG_NSH_IPv6NETMASK_6=0xffff
+CONFIG_NSH_IPv6NETMASK_7=0x0000
-CONFIG_NSH_IPv6NETMASK_7=0xffff
+CONFIG_NSH_IPv6NETMASK_8=0x0000
-CONFIG_NSH_IPv6NETMASK_8=0xff80
kostest:
-------
This is identical to the ostest configuration below except that NuttX
is built as a kernel-mode, monolithic module and the user applications
are built separately. Is is recommended to use a special make command;
not just 'make' but make with the following two arguments:
make pass1 pass2
In the normal case (just 'make'), make will attempt to build both user-
and kernel-mode blobs more or less interleaved. This actual works!
However, for me it is very confusing so I prefer the above make command:
Make the user-space binaries first (pass1), then make the kernel-space
binaries (pass2)
NOTES:
1. This is the default platform/toolchain in the configuration:
CONFIG_HOST_WINDOWS=y : Windows
CONFIG_WINDOWS_CYGWIN=y : Cygwin environment on Windows
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for Windows
This is easily changed by modifying the configuration.
2. At the end of the build, there will be several files in the top-level
NuttX build directory:
PASS1:
nuttx_user.elf - The pass1 user-space ELF file
nuttx_user.hex - The pass1 Intel HEX format file (selected in defconfig)
User.map - Symbols in the user-space ELF file
PASS2:
nuttx - The pass2 kernel-space ELF file
nuttx.hex - The pass2 Intel HEX file (selected in defconfig)
System.map - Symbols in the kernel-space ELF file
3. Combining .hex files. If you plan to use the STM32 ST-Link Utility to
load the .hex files into FLASH, then you need to combine the two hex
files into a single .hex file. Here is how you can do that.
a. The 'tail' of the nuttx.hex file should look something like this
(with my comments added):
$ tail nuttx.hex
# 00, data records
...
:10 9DC0 00 01000000000800006400020100001F0004
:10 9DD0 00 3B005A0078009700B500D400F300110151
:08 9DE0 00 30014E016D0100008D
# 05, Start Linear Address Record
:04 0000 05 0800 0419 D2
# 01, End Of File record
:00 0000 01 FF
Use an editor such as vi to remove the 05 and 01 records.
b. The 'head' of the nuttx_user.hex file should look something like
this (again with my comments added):
$ head nuttx_user.hex
# 04, Extended Linear Address Record
:02 0000 04 0801 F1
# 00, data records
:10 8000 00 BD89 01084C800108C8110208D01102087E
:10 8010 00 0010 00201C1000201C1000203C16002026
:10 8020 00 4D80 01085D80010869800108ED83010829
...
Nothing needs to be done here. The nuttx_user.hex file should
be fine.
c. Combine the edited nuttx.hex and un-edited nuttx_user.hex
file to produce a single combined hex file:
$ cat nuttx.hex nuttx_user.hex >combined.hex
Then use the combined.hex file with the STM32 ST-Link tool. If
you do this a lot, you will probably want to invest a little time
to develop a tool to automate these steps.
module:
------
A simple stripped down NSH configuration that was used for testing NuttX
OS modules using the test at apps/examples/module. Key difference from
other NSH configurations include these additions to the configuration file:
CONFIG_BOARDCTL_OS_SYMTAB=y
CONFIG_EXAMPLES_MODULE=y
CONFIG_EXAMPLES_MODULE_BUILTINFS=y
CONFIG_EXAMPLES_MODULE_DEVMINOR=0
CONFIG_EXAMPLES_MODULE_DEVPATH="/dev/ram0"
CONFIG_FS_ROMFS=y
CONFIG_LIBC_ARCH_ELF=y
CONFIG_MODULE=y
CONFIG_LIBC_MODLIB=y
CONFIG_MODLIB_MAXDEPEND=2
CONFIG_MODLIB_ALIGN_LOG2=2
CONFIG_MODLIB_BUFFERSIZE=128
CONFIG_MODLIB_BUFFERINCR=32
The could be followed may be added for testing shared libraries in the
FLAT build using apps/examples/sotest (assuming that you also have SD
card support enabled and that the SD card is mount at /mnt/sdcard):
CONFIG_LIBC_DLFCN=y
CONFIG_EXAMPLES_SOTEST=y
CONFIG_EXAMPLES_SOTEST_BINDIR="/mnt/sdcard"
NOTE: You must always have:
CONFIG_STM32_CCMEXCLUDE=y
because code cannot be executed from CCM memory.
STATUS:
2018-06-02: Configuration added by Alan Carvalho de Assis.
netnsh:
------
This is a special version of the NuttShell (nsh) configuration that is
tailored to work with the STM32F4DIS-BB base board. This version
derives from nsh configuration so all of the notes apply there except as
noted below.
NOTES:
1. This example uses USART6 for the serial console. The STM32F4DIS-BB
provides RS-232 drivers for USART6 and allows access via the DB9
connector on the base board. USART6 is, therefore, the more
convenient UART to use for the serial console.
2. Networking is enabled. The STM32F4DIS-BB has an SMC LAN2870 PHY
and RJ5 network connector. Support is enabled for ICMP, TCP/IP,
UDP, and ARP.
3. SD card support is enabled. The STM32F4DIS-BB has an on-board
microSD slot that should be automatically registered as the block
device /dev/mmcsd0 when an SD card is present. The SD card can
then be mounted by the NSH command:
nsh> mount -t /dev/mmcsd0 /mnt/sdcard
4. CCM memory is not included in the heap in this configuration. That
is because the SD card uses DMA and if DMA memory is allocated from
the CCM memory, the DMA will failure. This is an STM32 hardware
limitation.
If you want to get the CCM memory back in the heap, then you can
a) Disable microSD support (and DMAC2 which is then no longer
needed). If you reduce the clocking by a huge amount, it might
be possible to use microSD without DMA. This, however, may
not be possible.
b) Develop a strategy to manage CCM memory and DMA memory. Look
at this discussion on the NuttX Wiki:
https://cwiki.apache.org/confluence/display/NUTTX/STM32+CCM+Allocator
To put the CCM memory back into the heap you would need to change
the following in the NuttX configuration:
CONFIG_STM32_CCMEXCLUDE=n : Don't exclude CCM memory from the heap
CONFIG_MM_REGIONS=2 : With CCM, there will be two memory regions
nsh:
---
Configures the NuttShell (nsh) located at apps/examples/nsh. The
Configuration enables the serial interfaces on USART2. Support for
builtin applications is enabled, but in the base configuration no
builtin applications are selected (see NOTES below).
NOTES:
1. By default, this configuration uses the ARM EABI toolchain
for Windows and builds under Cygwin (or probably MSYS). That
can easily be reconfigured, of course.
CONFIG_HOST_WINDOWS=y : Builds under Windows
CONFIG_WINDOWS_CYGWIN=y : Using Cygwin
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for Windows
2. To use this configuration with the STM32F4DIS-BB baseboard you
should:
- Select the STM32F4DIS-BB baseboard in the board configuration
menu
- Disable USART2 and select USART6 in the STM32 peripheral selection
menu
- Select USART6 as the serial console at 115200 8N1 in the
Drivers menus
3. This example supports the PWM test (apps/examples/pwm) but this must
be manually enabled by selecting:
CONFIG_PWM=y : Enable the generic PWM infrastructure
CONFIG_STM32_TIM4=y : Enable TIM4
CONFIG_STM32_TIM4_PWM=y : Use TIM4 to generate PWM output
See also apps/examples/README.txt
Special PWM-only debug options:
CONFIG_DEBUG_PWM_INFO
4. This example supports the Quadrature Encode test (apps/examples/qencoder)
but this must be manually enabled by selecting:
CONFIG_EXAMPLES_QENCODER=y : Enable the apps/examples/qencoder
CONFIG_SENSORS=y : Enable support for sensors
CONFIG_SENSORS_QENCODER=y : Enable the generic Quadrature Encoder infrastructure
CONFIG_STM32_TIM8=y : Enable TIM8
CONFIG_STM32_TIM2=n : (Or optionally TIM2)
CONFIG_STM32_TIM8_QE=y : Use TIM8 as the quadrature encoder
CONFIG_STM32_TIM2_QE=y : (Or optionally TIM2)
See also apps/examples/README.tx. Special debug options:
CONFIG_DEBUG_SENSORS
5. This example supports the watchdog timer test (apps/examples/watchdog)
but this must be manually enabled by selecting:
CONFIG_EXAMPLES_WATCHDOG=y : Enable the apps/examples/watchdog
CONFIG_WATCHDOG=y : Enables watchdog timer driver support
CONFIG_STM32_WWDG=y : Enables the WWDG timer facility, OR
CONFIG_STM32_IWDG=y : Enables the IWDG timer facility (but not both)
The WWDG watchdog is driven off the (fast) 42MHz PCLK1 and, as result,
has a maximum timeout value of 49 milliseconds. For WWDG watchdog, you
should also add the following to the configuration file:
CONFIG_EXAMPLES_WATCHDOG_PINGDELAY=20
CONFIG_EXAMPLES_WATCHDOG_TIMEOUT=49
The IWDG timer has a range of about 35 seconds and should not be an issue.
6. USB Support (CDC/ACM device)
CONFIG_STM32_OTGFS=y : STM32 OTG FS support
CONFIG_USBDEV=y : USB device support must be enabled
CONFIG_CDCACM=y : The CDC/ACM driver must be built
CONFIG_NSH_BUILTIN_APPS=y : NSH built-in application support must be enabled
CONFIG_NSH_ARCHINIT=y : To perform USB initialization
7. Using the USB console.
The STM32F4Discovery NSH configuration can be set up to use a USB CDC/ACM
(or PL2303) USB console. The normal way that you would configure the
the USB console would be to change the .config file like this:
CONFIG_STM32_OTGFS=y : STM32 OTG FS support
CONFIG_USART2_SERIAL_CONSOLE=n : Disable the USART2 console
CONFIG_DEV_CONSOLE=n : Inhibit use of /dev/console by other logic
CONFIG_USBDEV=y : USB device support must be enabled
CONFIG_CDCACM=y : The CDC/ACM driver must be built
CONFIG_CDCACM_CONSOLE=y : Enable the CDC/ACM USB console.
NOTE: When you first start the USB console, you have hit ENTER a few
times before NSH starts. The logic does this to prevent sending USB data
before there is anything on the host side listening for USB serial input.
8. Here is an alternative USB console configuration. The following
configuration will also create a NSH USB console but this version
will use /dev/console. Instead, it will use the normal /dev/ttyACM0
USB serial device for the console:
CONFIG_STM32_OTGFS=y : STM32 OTG FS support
CONFIG_USART2_SERIAL_CONSOLE=y : Keep the USART2 console
CONFIG_DEV_CONSOLE=y : /dev/console exists (but NSH won't use it)
CONFIG_USBDEV=y : USB device support must be enabled
CONFIG_CDCACM=y : The CDC/ACM driver must be built
CONFIG_CDCACM_CONSOLE=n : Don't use the CDC/ACM USB console.
CONFIG_NSH_USBCONSOLE=y : Instead use some other USB device for the console
The particular USB device that is used is:
CONFIG_NSH_USBCONDEV="/dev/ttyACM0"
The advantage of this configuration is only that it is easier to
bet working. This alternative does has some side effects:
- When any other device other than /dev/console is used for a user
interface, linefeeds (\n) will not be expanded to carriage return /
linefeeds (\r\n). You will need to set your terminal program to account
for this.
- /dev/console still exists and still refers to the serial port. So
you can still use certain kinds of debug output (see include/debug.h, all
of the debug output from interrupt handlers will be lost.
- But don't enable USB debug output! Since USB is console is used for
USB debug output and you are using a USB console, there will be
infinite loops and deadlocks: Debug output generates USB debug
output which generatates USB debug output, etc. If you want USB
debug output, you should consider enabling USB trace
(CONFIG_USBDEV_TRACE) and perhaps the USB monitor (CONFIG_USBMONITOR).
See the usbnsh configuration below for more information on configuring
USB trace output and the USB monitor.
9. USB OTG FS Host Support. The following changes will enable support for
a USB host on the STM32F4Discovery, including support for a mass storage
class driver:
Device Drivers ->
CONFIG_USBDEV=n : Make sure the USB device support is disabled
CONFIG_USBHOST=y : Enable USB host support
CONFIG_USBHOST_ISOC_DISABLE=y
Device Drivers -> USB Host Driver Support
CONFIG_USBHOST_MSC=y : Enable the mass storage class
System Type -> STM32 Peripheral Support
CONFIG_STM32_OTGFS=y : Enable the STM32 USB OTG FS block
CONFIG_STM32_SYSCFG=y : Needed for all USB OTF FS support
RTOS Features -> Work Queue Support
CONFIG_SCHED_WORKQUEUE=y : High priority worker thread support is required
CONFIG_SCHED_HPWORK=y : for the mass storage class driver.
File Systems ->
CONFIG_FS_FAT=y : Needed by the USB host mass storage class.
Board Selection ->
CONFIG_LIB_BOARDCTL=y : Needed for CONFIG_NSH_ARCHINIT
Application Configuration -> NSH Library
CONFIG_NSH_ARCHINIT=y : Architecture specific USB initialization
: is needed for NSH
With those changes, you can use NSH with a FLASH pen driver as shown
belong. Here NSH is started with nothing in the USB host slot:
NuttShell (NSH) NuttX-x.yy
nsh> ls /dev
/dev:
console
null
ttyS0
After inserting the FLASH drive, the /dev/sda appears and can be
mounted like this:
nsh> ls /dev
/dev:
console
null
sda
ttyS0
nsh> mount -t vfat /dev/sda /mnt/stuff
nsh> ls /mnt/stuff
/mnt/stuff:
-rw-rw-rw- 16236 filea.c
And files on the FLASH can be manipulated to standard interfaces:
nsh> echo "This is a test" >/mnt/stuff/atest.txt
nsh> ls /mnt/stuff
/mnt/stuff:
-rw-rw-rw- 16236 filea.c
-rw-rw-rw- 16 atest.txt
nsh> cat /mnt/stuff/atest.txt
This is a test
nsh> cp /mnt/stuff/filea.c fileb.c
nsh> ls /mnt/stuff
/mnt/stuff:
-rw-rw-rw- 16236 filea.c
-rw-rw-rw- 16 atest.txt
-rw-rw-rw- 16236 fileb.c
To prevent data loss, don't forget to un-mount the FLASH drive
before removing it:
nsh> umount /mnt/stuff
10. I used this configuration to test the USB hub class. I did this
testing with the following changes to the configuration (in addition
to those listed above for base USB host/mass storage class support):
Drivers -> USB Host Driver Support
CONFIG_USBHOST_HUB=y : Enable the hub class
CONFIG_USBHOST_ASYNCH=y : Asynchronous I/O supported needed for hubs
System Type -> USB host configuration
To be determined
Board Selection ->
CONFIG_STM32F4DISCO_USBHOST_STACKSIZE=2048 (bigger than it needs to be)
RTOS Features -> Work Queue Support
CONFIG_SCHED_LPWORK=y : Low priority queue support is needed
CONFIG_SCHED_LPNTHREADS=1
CONFIG_SCHED_LPWORKSTACKSIZE=1024
NOTES:
1. It is necessary to perform work on the low-priority work queue
(vs. the high priority work queue) because deferred hub-related
work requires some delays and waiting that is not appropriate on
the high priority work queue.
2. Stack usage make increase when USB hub support is enabled because
the nesting depth of certain USB host class logic can increase.
STATUS:
2015-04-30
Appears to be fully functional.
11. Using USB Device as a Mass Storage for the host computer:
System Type --->
STM32 Peripheral Support --->
[*] OTG FS
Device Drivers --->
[*] USB Device Driver Support --->
[*] USB Mass storage class device --->
[*] Mass storage removable
[*] RAM Disk Support
Board Selection --->
[*] Enable boardctl() interface
[*] Enable USB device controls
File Systems --->
[*] FAT file system
[*] FAT upper/lower names
[*] FAT long file names
[*] PROCFS File System
Application Configuration --->
System Libraries and NSH Add-Ons --->
[*] USB Mass Storage Device Commands --->
(/dev/ram0) LUN1 Device Path
Compile and flash the firmware in the board as usual, then in the nsh:
nsh> mkrd -m 0 -s 512 64
nsh> ls /dev
/dev:
console
null
ram0
ttyS0
nsh> mkfatfs /dev/ram0
Connect a USB cable to STM32F4Discovery board (connector CN5) and run:
nsh> msconn
mcsonn_main: Creating block drivers
mcsonn_main: Configuring with NLUNS=1
mcsonn_main: handle=1000a550
mcsonn_main: Bind LUN=0 to /dev/ram0
mcsonn_main: Connected
In this moment a 33KB disk should appear in your host computer. If you
saved some file on this small disk you can now run disconnect command:
nsh> msdis
msdis: Disconnected
Remove the USB cable from microUSB connector and run:
nsh> mount -t vfat /dev/ram0 /mnt
nsh> ls /mnt
/mnt:
TEST.TXT
nsh> cat /mnt/TEST.TXT
Testing
nxlines:
------
An example using the NuttX graphics system (NX). This example focuses on
placing lines on the background in various orientations.
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for Windows
CONFIG_LCD_LANDSCAPE=y : 320x240 landscape orientation
The STM32F4Discovery board does not have any graphics capability. This
configuration assumes that you have connected an SD1289-based LCD as
described above under "SSD1289". NOTE: At present, it has not been
proven that the STM32F4Discovery can actually drive an LCD. There are
some issues with how some of the dedicated FSMC pins are used on the
boards. This configuration may not be useful and may only serve as
an illustration of how to build for th SSD1289 LCD.
NOTES:
1. As of this writing, I have not seen the LCD work!
2. This configured can be re-configured to use either the
UG-2864AMBAG01 or UG-2864HSWEG01 0.96 inch OLEDs by adding
or changing the following items in the configuration (using
'make menuconfig'):
+CONFIG_SPI_CMDDATA=y
-CONFIG_LCD_MAXCONTRAST=1
-CONFIG_LCD_MAXPOWER=255
+CONFIG_LCD_MAXCONTRAST=255
+CONFIG_LCD_MAXPOWER=1
-CONFIG_LCD_SSD1289=y
-CONFIG_SSD1289_PROFILE1=y
+CONFIG_LCD_UG2864AMBAG01=y : For the UG-2964AMBAG01
+CONFIG_UG2864AMBAG01_SPIMODE=3
+CONFIG_UG2864AMBAG01_FREQUENCY=3500000
+CONFIG_UG2864AMBAG01_NINTERFACES=1
-CONFIG_NX_DISABLE_1BPP=y
+CONFIG_NX_DISABLE_16BPP=y
+CONFIG_NXSTART_EXTERNINIT=y
-CONFIG_EXAMPLES_NXLINES_BGCOLOR=0x0320
-CONFIG_EXAMPLES_NXLINES_LINEWIDTH=16
-CONFIG_EXAMPLES_NXLINES_LINECOLOR=0xffe0
-CONFIG_EXAMPLES_NXLINES_BORDERWIDTH=4
-CONFIG_EXAMPLES_NXLINES_BORDERCOLOR=0xffe0
-CONFIG_EXAMPLES_NXLINES_CIRCLECOLOR=0xf7bb
-CONFIG_EXAMPLES_NXLINES_BPP=16
+CONFIG_EXAMPLES_NXLINES_BGCOLOR=0x00
+CONFIG_EXAMPLES_NXLINES_LINEWIDTH=4
+CONFIG_EXAMPLES_NXLINES_LINECOLOR=0x01
+CONFIG_EXAMPLES_NXLINES_BORDERWIDTH=2
+CONFIG_EXAMPLES_NXLINES_BORDERCOLOR=0x01
+CONFIG_EXAMPLES_NXLINES_CIRCLECOLOR=0x00
+CONFIG_EXAMPLES_NXLINES_BPP=1
+CONFIG_EXAMPLES_NXLINES_EXTERNINIT=y
There are some issues with the presentation... some tuning of the
configuration could fix that. Lower resolution displays are also more
subject to the "fat, flat line bug" that I need to fix someday. See
https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629474
for a description of the fat, flat line bug.
pm:
--
This is a configuration that is used to test STM32 power management, i.e.,
to test that the board can go into lower and lower states of power usage
as a result of inactivity. This configuration is based on the nsh2
configuration with modifications for testing power management. This
configuration should provide some guidelines for power management in your
STM32 application.
NOTES:
1. Default configuration is Cygwin under windows using the AM EABI GCC
toolchain:
CONFIG_HOST_WINDOWS=y : Windows
CONFIG_WINDOWS_CYGWIN=y : Cygwin
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for Windows
2. CONFIG_ARCH_CUSTOM_PMINIT and CONFIG_ARCH_IDLE_CUSTOM are necessary
parts of the PM configuration:
CONFIG_ARCH_CUSTOM_PMINIT=y
CONFIG_ARCH_CUSTOM_PMINIT moves the PM initialization from
arch/arm/src/stm32/stm32_pminitialiaze.c to boards/arm/stm32/stm3210-eval/src/stm32_pm.c.
This allows us to support board-specific PM initialization.
CONFIG_ARCH_IDLE_CUSTOM=y
The bulk of the PM activities occur in the IDLE loop. The IDLE loop
is special because it is what runs when there is no other task running.
Therefore when the IDLE executes, we can be assure that nothing else
is going on; this is the ideal condition for doing reduced power
management.
The configuration CONFIG_ARCH_IDLE_CUSTOM allows us to "steal" the
normal STM32 IDLE loop (of arch/arm/src/stm32/stm32_idle.c) and replace
this with our own custom IDLE loop (at boards/arm/stm32/stm3210-eval/src/up_idle.c).
3. Here are some additional things to note in the configuration:
CONFIG_PM_BUTTONS=y
CONFIG_PM_BUTTONS enables button support for PM testing. Buttons can
drive EXTI interrupts and EXTI interrupts can be used to wakeup for
certain reduced power modes (STOP mode). The use of the buttons here
is for PM testing purposes only; buttons would normally be part the
application code and CONFIG_PM_BUTTONS would not be defined.
CONFIG_RTC_ALARM=y
The RTC alarm is used to wake up from STOP mode and to transition to
STANDBY mode. This used of the RTC alarm could conflict with other
uses of the RTC alarm in your application.
posix_spawn:
------------
This configuration directory, performs a simple test os the posix_spawn
interface using apps/examples/posix_spawn.
NOTES:
1. Default toolchain:
CONFIG_HOST_WINDOWS=y : Builds under windows
CONFIG_WINDOWS_CYGWIN=y : Using Cygwin and
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : Generic ARM EABI toolchain for Windows
2. By default, this project assumes that you are *NOT* using the DFU
bootloader.
pseudoterm:
-----------
This is a configuration to test the Pseudo Terminal support for NuttX.
To test it you will need two USB/Serial dongles. The first dongle as
usual will be used to main NSH console port in USART2 (PA2 and PA3) and
the second dongle you will connect to UART3 (PB10 and PB11).
In the main NSH console (in USART2) type: "pts_test &". It will create a
new console in UART3. Just press ENTER and start typing commands on it.
sporadic
--------
This is an NSH configuration that includes apps/testing/ostest as a builtin.
The sporadic scheduler is enabled and the purpose of this configuration is
to investigate an error in that scheduler. See Issue 2035. The serial
console is on USART6.
testlibcxx
----------
This is a configuration for testing lib++. See the section above entitled
"Testing LLVM LIBC++ with NuttX" for detailed information about this
configuration.
rgbled:
-------
Alan Carvalho de Assis has used the STM32F4-Discovery to drive an RGB LED
using PWM output. The external RGB connected this way:
R = TIM1 CH1 on PE9
G = TIM2 CH2 on PA1
B = TIM3 CH3 on PB0
as described about in the section "RGB LED Driver".
This configuration uses the example at apps/examples/rgbled to drive the
external RGB LED>
rndis:
------
This is a board configuration to demonstrate how to use Ethernet-over-USB,
in this case using the RNDIS protocol. Using it you can get access to your
board using Telnet or you can use transfer file to it. Both steps will be
explained below.
Your board will be get IP address from a DHCP server. If you want to use a
fixed IP instead using DHCP, you need to disable the DHCP Client and set
up its IP. For more info watch: www.youtube.com/watch?v=8noH8v7xNgs
You can access the board's NuttShell just typing in the Linux terminal:
$ telnet 10.0.0.2
You should see something like this:
Trying 10.0.0.2...
Connected to 10.0.0.2.
Escape character is '^]'.
NuttShell (NSH)
nsh>
This board configuration has support to RAMDISK because we need a writable
filesystem to get files from the computer. Then you need to create first a
RAMDISK and mount it using these steps:
nsh> mkrd 64
nsh> mkfatfs /dev/ram0
nsh> mount -t vfat /dev/ram0 /mnt
Open a new Linux terminal and start a webserver, Python one embedded:
$ python -m SimpleHTTPServer
It will create a webserver serving in the port 8000 and will share files
in the current directory where it was executed.
Then in the NuttShell you can run these commands to download a small file:
nsh> cd /mnt
nsh> wget http://10.0.0.1:8000/test.txt
nsh> ls -l
/mnt:
-rw-rw-rw- 23 test.txt
This configuration also supports:
1. An NFS file system client. Relevant configuration options:
CONFIG_NFS=y
CONFIG_NFS_STATISTICS=y
2. Loadable ELF modules
CONFIG_SYMTAB_ORDEREDBYNAME=y
CONFIG_ELF=y
CONFIG_EXAMPLES_HELLO=m
CONFIG_LIBC_EXECFUNCS=y
CONFIG_NSH_FILE_APPS=y
CONFIG_SYSTEM_NSH_SYMTAB=y
CONFIG_SYSTEM_NSH_SYMTAB_ARRAYNAME="g_symtab"
CONFIG_SYSTEM_NSH_SYMTAB_COUNTNAME="g_nsymbols"
Further, the configuration assumes that executable files reside on the
remotely mounted file system:
CONFIG_LIB_ENVPATH=y
CONFIG_PATH_INITIAL="/mnt/nfs/bin"
3 'ping' support
CONFIG_NET_ICMP_SOCKET=y
CONFIG_SYSTEM_PING=y
usbnsh:
-------
This is another NSH example. If differs from other 'nsh' configurations
in that this configurations uses a USB serial device for console I/O.
Such a configuration is useful on the stm32f4discovery which has no
builtin RS-232 drivers.
NOTES:
1. By default, this configuration uses the ARM EABI toolchain
for Windows and builds under Cygwin (or probably MSYS). That
can easily be reconfigured, of course.
CONFIG_HOST_WINDOWS=y : Builds under Windows
CONFIG_WINDOWS_CYGWIN=y : Using Cygwin
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for Windows
2. This configuration does have USART2 output enabled and set up as
the system logging device:
CONFIG_SYSLOG_CHAR=y : Use a character device for system logging
CONFIG_SYSLOG_DEVPATH="/dev/ttyS0" : USART2 will be /dev/ttyS0
However, there is nothing to generate SYSLOG output in the default
configuration so nothing should appear on USART2 unless you enable
some debug output or enable the USB monitor.
NOTE: Using the SYSLOG to get debug output has limitations. Among
those are that you cannot get debug output from interrupt handlers.
So, in particularly, debug output is not a useful way to debug the
USB device controller driver. Instead, use the USB monitor with
USB debug off and USB trace on (see below).
3. Enabling USB monitor SYSLOG output. If tracing is enabled, the USB
device will save encoded trace output in in-memory buffer; if the
USB monitor is enabled, that trace buffer will be periodically
emptied and dumped to the system logging device (USART2 in this
configuration):
CONFIG_USBDEV_TRACE=y : Enable USB trace feature
CONFIG_USBDEV_TRACE_NRECORDS=128 : Buffer 128 records in memory
CONFIG_NSH_USBDEV_TRACE=n : No builtin tracing from NSH
CONFIG_NSH_ARCHINIT=y : Automatically start the USB monitor
CONFIG_USBMONITOR=y : Enable the USB monitor daemon
CONFIG_USBMONITOR_STACKSIZE=2048 : USB monitor daemon stack size
CONFIG_USBMONITOR_PRIORITY=50 : USB monitor daemon priority
CONFIG_USBMONITOR_INTERVAL=2 : Dump trace data every 2 seconds
CONFIG_USBMONITOR_TRACEINIT=y : Enable TRACE output
CONFIG_USBMONITOR_TRACECLASS=y
CONFIG_USBMONITOR_TRACETRANSFERS=y
CONFIG_USBMONITOR_TRACECONTROLLER=y
CONFIG_USBMONITOR_TRACEINTERRUPTS=y
4. By default, this project assumes that you are *NOT* using the DFU
bootloader.
Using the Prolifics PL2303 Emulation
------------------------------------
You could also use the non-standard PL2303 serial device instead of
the standard CDC/ACM serial device by changing:
CONFIG_CDCACM=n : Disable the CDC/ACM serial device class
CONFIG_CDCACM_CONSOLE=n : The CDC/ACM serial device is NOT the console
CONFIG_PL2303=y : The Prolifics PL2303 emulation is enabled
CONFIG_PL2303_CONSOLE=y : The PL2303 serial device is the console
winbuild:
--------
This is a version of the apps/example/ostest, but configure to build natively
in the Windows CMD shell.
NOTES:
1. The beginnings of a Windows native build are in place but still not full
usable as of this writing. The windows native build logic is currently
separate and must be started by:
make -f Makefile.win
This build:
- Uses all Windows style paths
- Uses primarily Windows batch commands from cmd.exe, with
- A few extensions from GNUWin32 (or MSYS is you prefer)
In this build, you cannot use a Cygwin or MSYS shell. Rather the build must
be performed in a Windows console. Here is a better shell than than the
standard issue, CMD.exe shell: ConEmu which can be downloaded from:
http://code.google.com/p/conemu-maximus5/
CONFIG_HOST_WINDOWS=y : Windows
CONFIG_WINDOWS_NATIVE=y : Native Windows environment
CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for Windows
Build Tools. The build still relies on some Unix-like commands. I use
the GNUWin32 tools that can be downloaded from http://gnuwin32.sourceforge.net/.
The MSYS tools are probably also a option but are likely lower performance
since they are based on Cygwin 1.3.
Host Compiler: I use the MingGW compiler which can be downloaded from
http://www.mingw.org/. If you are using GNUWin32, then it is recommended
the you not install the optional MSYS components as there may be conflicts.
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