458 lines
16 KiB
Plaintext
458 lines
16 KiB
Plaintext
README
|
|
======
|
|
|
|
This README discusses issues unique to NuttX configurations for the
|
|
STM32 Tiny development board.
|
|
|
|
This board is available from several vendors on the net, and may
|
|
be sold under different names. It is based on a STM32 F103C8T6 MCU, and
|
|
is (always ?) bundled with a nRF24L01 wireless communication module.
|
|
|
|
Contents
|
|
========
|
|
|
|
- LEDs
|
|
- PWM
|
|
- UARTs
|
|
- Timer Inputs/Outputs
|
|
- STM32 Tiny -specific Configuration Options
|
|
- Configurations
|
|
|
|
LEDs
|
|
====
|
|
|
|
The STM32Tiny board has only one software controllable LED.
|
|
This LED can be used by the board port when CONFIG_ARCH_LEDS option is
|
|
enabled.
|
|
|
|
If enabled the LED is simply turned on when the board boots
|
|
succesfully, and is blinking on panic / assertion failed.
|
|
|
|
PWM
|
|
===
|
|
|
|
The STM32 Tiny has no real on-board PWM devices, but the board can be
|
|
configured to output a pulse train using TIM3 CH2 on the GPIO line B.5
|
|
(connected to the LED).
|
|
Please note that the CONFIG_STM32_TIM3_PARTIAL_REMAP option must be enabled
|
|
in this case.
|
|
|
|
UARTs
|
|
=====
|
|
|
|
UART/USART PINS
|
|
---------------
|
|
|
|
USART1
|
|
RX PA10
|
|
TX PA9
|
|
USART2
|
|
CK PA4
|
|
CTS PA0*
|
|
RTS PA1
|
|
RX PA3
|
|
TX PA2
|
|
USART3
|
|
CK PB12*
|
|
CTS PB13*
|
|
RTS PB14*
|
|
RX PB11
|
|
TX PB10
|
|
|
|
* theses IO lines are intended to be used by the wireless module on the board.
|
|
|
|
|
|
Default USART/UART Configuration
|
|
--------------------------------
|
|
|
|
USART1 (RX & TX only) is available through the RS-232 port on the board. A MAX232 chip converts
|
|
voltage to RS-232 level. This serial port can be used to flash a firmware using the boot loader
|
|
integrated in the MCU.
|
|
|
|
|
|
Timer Inputs/Outputs
|
|
====================
|
|
|
|
TIM1
|
|
CH1 PA8
|
|
CH2 PA9*
|
|
CH3 PA10*
|
|
CH4 PA11*
|
|
TIM2
|
|
CH1 PA0*, PA15, PA5
|
|
CH2 PA1, PB3
|
|
CH3 PA2, PB10*
|
|
CH4 PA3, PB11
|
|
TIM3
|
|
CH1 PA6, PB4
|
|
CH2 PA7, PB5*
|
|
CH3 PB0
|
|
CH4 PB1*
|
|
TIM4
|
|
CH1 PB6*
|
|
CH2 PB7
|
|
CH3 PB8
|
|
CH4 PB9*
|
|
|
|
* Indicates pins that have other on-board functions and should be used only
|
|
with care (See board datasheet).
|
|
|
|
|
|
STM32 Tiny - 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_CORTEXM3=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_STM32F103C8=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 configs subdirectory and
|
|
hence, the board that supports the particular chip or SoC.
|
|
|
|
CONFIG_ARCH_BOARD=stm32_tiny
|
|
|
|
CONFIG_ARCH_BOARD_name - For use in C code
|
|
|
|
CONFIG_ARCH_BOARD_STM32_TINY=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 DRAM (SRAM in this case):
|
|
|
|
CONFIG_RAM_SIZE=20480 (20Kb)
|
|
|
|
CONFIG_RAM_START - The start address of installed DRAM
|
|
|
|
CONFIG_RAM_START=0x20000000
|
|
|
|
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_CALIBRATION - Enables some build in instrumentation that
|
|
cause a 100 second delay during boot-up. This 100 second delay
|
|
serves no purpose other than it allows you to calibratre
|
|
CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
|
|
the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
|
|
the delay actually is 100 seconds.
|
|
|
|
Individual subsystems can be enabled:
|
|
|
|
AHB
|
|
---
|
|
CONFIG_STM32_CRC
|
|
CONFIG_STM32_BKPSRAM
|
|
|
|
APB1
|
|
----
|
|
CONFIG_STM32_TIM2
|
|
CONFIG_STM32_TIM3
|
|
CONFIG_STM32_TIM4
|
|
CONFIG_STM32_WWDG
|
|
CONFIG_STM32_IWDG
|
|
CONFIG_STM32_SPI2
|
|
CONFIG_STM32_USART2
|
|
CONFIG_STM32_USART3
|
|
CONFIG_STM32_I2C1
|
|
CONFIG_STM32_I2C2
|
|
CONFIG_STM32_CAN1
|
|
CONFIG_STM32_PWR -- Required for RTC
|
|
|
|
APB2
|
|
----
|
|
CONFIG_STM32_TIM1
|
|
CONFIG_STM32_USART1
|
|
CONFIG_STM32_ADC1
|
|
CONFIG_STM32_ADC2
|
|
CONFIG_STM32_SPI1
|
|
|
|
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 or ADC conversion.
|
|
Note that ADC require two definitions: Not only do you have
|
|
to assign the timer (n) for used by the ADC, but then you also have to
|
|
configure which ADC (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
|
|
|
|
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
|
|
|
|
STM32Tiny specific device driver settings
|
|
|
|
CONFIG_U[S]ARTn_SERIAL_CONSOLE - selects the USARTn (n=1,2,3)
|
|
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
|
|
|
|
STM32Tiny 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.
|
|
|
|
STM32Tiny 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.
|
|
|
|
Configurations
|
|
==============
|
|
|
|
Each STM32Tiny configuration is maintained in a sub-directory and
|
|
can be selected as follow:
|
|
|
|
tools/configure.sh STM32Tiny/<subdir>
|
|
|
|
Where <subdir> is one of the following:
|
|
|
|
nsh:
|
|
---
|
|
Configures the NuttShell (nsh) located at apps/examples/nsh. This
|
|
configuration enables a console on UART1. Support for
|
|
builtin applications is enabled, but in the base configuration no
|
|
builtin applications are selected (see NOTES below).
|
|
|
|
NOTES:
|
|
|
|
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.
|
|
|
|
2. By default, this configuration uses the CodeSourcery 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_CODESOURCERYW=y : CodeSourcery for Windows
|
|
|
|
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_TIM3=y : Enable TIM3
|
|
CONFIG_STM32_TIM3_PWM=y : Use TIM3 to generate PWM output
|
|
CONFIG_STM32_TIM3_PARTIAL_REMAP=y : Required to have the port B5 as timer PWM output (channel 2)
|
|
CONFIG_STM32_TIM3_CHANNEL=2
|
|
|
|
See also apps/examples/README.txt
|
|
|
|
Note that the only supported board configuration uses the board LED as PWM output.
|
|
|
|
Special PWM-only debug options:
|
|
|
|
CONFIG_DEBUG_PWM_INFO
|
|
|
|
7. 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
|
|
|
|
8. Using the USB console.
|
|
|
|
The STM32Tiny 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.
|
|
|
|
9. 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.
|
|
|
|
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.
|
|
|
|
NOTES:
|
|
|
|
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.
|
|
|
|
2. By default, this configuration uses the CodeSourcery 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_CODESOURCERYW=y : CodeSourcery for Windows
|
|
|
|
3. This configuration does have UART2 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" : UART2 will be /dev/ttyS0
|
|
|
|
However, there is nothing to generate SYLOG output in the default
|
|
configuration so nothing should appear on UART2 unless you enable
|
|
some debug output or enable the USB monitor.
|
|
|
|
4. 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 loggin device (UART2 in this
|
|
configuraion):
|
|
|
|
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
|
|
|
|
5. 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=y : Disable the CDC/ACM serial device class
|
|
CONFIG_CDCACM_CONSOLE=y : 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
|