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README
======
This README discusses issues unique to NuttX configurations for the M3
Wildfire development board (STM32F103VET6). See http://firestm32.taobao.com
This configuration should support both the version 2 and version 3 of the
Wildfire board (using NuttX configuration options). However, only version 2
has been verified.
Contents
========
- Pin Configuration
- Development Environment
- GNU Toolchain Options
- IDEs
- NuttX EABI "buildroot" Toolchain
- NuttX OABI "buildroot" Toolchain
- NXFLAT Toolchain
- DFU and JTAG
- OpenOCD
- LEDs
- RTC
- M3 Wildfire-specific Configuration Options
- Configurations
Pin Configuration
=================
--- ------ -------------- -------------------------------------------------------------------
PIN NAME SIGNAL NOTES
--- ------ -------------- -------------------------------------------------------------------
1 PE2 PE2-C-RCLK Camera (P9)
2 PE3 PE3-USB-M USB2.0
3 PE4 PE4-BEEP LS1 Bell (v2)
PE4 10Mbps ENC28J60 Interrupt (v3)
4 PE5 (no name) 10Mbps ENC28J60 Interrupt (v2)
PE5 KEY1, Low when closed (pulled high if open) (v3)
5 PE6
6 VBAT BT1 Battery (BT1)
7 PC13 Header 7X2
8 PC14 PC14/OSC32-IN Y2 32.768KHz
9 PC15 PC15/OSC32-OUT Y2 32.768KHz
10 VSS_5 DGND
11 VDD_5 3V3
12 OSC_IN Y1 8MHz
13 OSC_OUT Y1 8MHz
14 NRST REST1 Reset switch
15 PC0
16 PC1 PC1/ADC123-IN11 Potentiometer (R16)
17 PC2
18 PC3 PC3-LED1 LED1, Active low (pulled high)
19 VSSA DGND
20 VREF- DGND
21 VREF+ 3V3
22 VDDA 3V3
23 PA0 PA0-C-VSYNC Camera (P9)
24 PA1 PC1/ADC123-IN1
25 PA2 PA2-US2-TX MAX3232, DB9 D7
--- ------ -------------- -------------------------------------------------------------------
PIN NAME SIGNAL NOTES
--- ------ -------------- -------------------------------------------------------------------
26 PA3 PA3-US2-RX MAX3232, DB9 D7
27 VSS_4 DGND
28 VDD_4 3V3
29 PA4 PA4-SPI1-NSS 10Mbit ENC28J60, SPI 2M FLASH
30 PA5 PA5-SPI1-SCK 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
31 PA6 PA6-SPI1-MISO 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
32 PA7 PA7-SPI1-MOSI 2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
33 PC4 PC4-LED2 LED2, Active low (pulled high)
34 PC5 PC5-LED3 LED3, Active low (pulled high)
35 PB0 PB0-KEY1 KEY1, Low when closed (pulled high if open) (v2)
PB0 Header P5 (v3)
36 PB1 PB1-KEY2 KEY2, Low when closed (pulled high if open)
37 PB2 BOOT1/DGND
38 PE7 PE7-FSMC_D4 2.4" TFT + Touchscreen
39 PE8 PE8-FSMC_D5 2.4" TFT + Touchscreen
40 PE9 PE9-FSMC_D6 2.4" TFT + Touchscreen
41 PE10 PE10-FSMC_D7 2.4" TFT + Touchscreen
42 PE11 PE11-FSMC_D8 2.4" TFT + Touchscreen
43 PE12 PE12-FSMC_D9 2.4" TFT + Touchscreen
44 PE13 PE13-FSMC_D10 2.4" TFT + Touchscreen
45 PE14 PE14-FSMC_D11 2.4" TFT + Touchscreen
46 PE15 PE15-FSMC_D12 2.4" TFT + Touchscreen
47 PB10 PB10-C-DO_2 Camera (P9)
48 PB11 PB11-MP3-RST MP3
PB11-C-DO_3 Camera (P9)
49 VSS_1 DGND
50 VDD_1 3V3
--- ------ -------------- -------------------------------------------------------------------
PIN NAME SIGNAL NOTES
--- ------ -------------- -------------------------------------------------------------------
51 PB12 PB12-SPI2-NSS MP3
PB12-C-DO_4 Camera (P9)
52 PB13 PB13-SPI2-SCK MP3
PB13-C-DO_5 Camera (P9)
53 PB14 PB14-SPI2-MISO MP3
PB14-C-DO_6 Camera (P9)
54 PB15 PB15-SPI2-MOSI MP3
PB15-C-DO_7 Camera (P9)
55 PD8 PD8-FSMC_D13 2.4" TFT + Touchscreen
56 PD9 PD9-FSMC_D14 2.4" TFT + Touchscreen
57 PD10 PD10-FSMC_D15 2.4" TFT + Touchscreen
58 PD11 PD11-FSMC_A16 2.4" TFT + Touchscreen
59 PD12 C-LED_EN Camera (P9)
60 PD13 PD13-LCD/LIGHT 2.4" TFT + Touchscreen
61 PD14 PD14-FSMC_D0 2.4" TFT + Touchscreen
62 PD15 PD15-FSMC_D1 2.4" TFT + Touchscreen
63 PC6 PC6-MP3-XDCS MP3
PC6-C-SIO_C Camera (P9)
64 PC7 PC7-MP3-DREQ MP3
PC7-C-SIO_D Camera (P9)
65 PC8 PC8-SDIO-D0 SD card, pulled high
66 PC9 PC9-SDIO-D1 SD card, pulled high
67 PA8 PA8-C-XCLK Camera (P9)
68 PA9 PA9-US1-TX MAX3232, DB9 D8
69 PA10 PA10-US1-RX MAX3232, DB9 D8
70 PA11 PA11-USBDM USB2.0
71 PA12 PA12-USBDP USB2.0
72 PA13 PA13-JTMS JTAG
73 N/C
74 VSS_2 DGND
75 VDD_2 3V3
--- ------ -------------- -------------------------------------------------------------------
PIN NAME SIGNAL NOTES
--- ------ -------------- -------------------------------------------------------------------
76 PA14 PA14-JTCK JTAG
77 PA15 PA15-JTDI JTAG
78 PC10 PC10-SDIO-D2 SD card, pulled high
79 PC11 PC10-SDIO-D3 SD card, pulled high
80 PC12 PC12-SDIO-CLK SD card
81 PD0 PD0-FSMC_D2 2.4" TFT + Touchscreen
82 PD1 PD1-FSMC_D3 2.4" TFT + Touchscreen
83 PD2 PD2-SDIO-CMD SD card, pulled high
84 PD3 PD3-C-WEN Camera (P9)
85 PD4 PD4-FSMC_NOE 2.4" TFT + Touchscreen
86 PD5 PD5-FSMC_NWE 2.4" TFT + Touchscreen
87 PD6 PD6-C-OE Camera (P9)
88 PD7 PD7-FSMC_NE1 2.4" TFT + Touchscreen
89 PB3 PB3-JTDO JTAG
90 PB4 PB4-NJTRST JTAG
91 PB5 PB5-C-WRST Camera (P9)
92 PB6 PB6-I2C1-SCL 2.4" TFT + Touchscreen, AT24C02
93 PB7 PB7-I2C1-SDA 2.4" TFT + Touchscreen, AT24C02
94 BOOT0 SW3 3V3 or DGND
95 PB8 PB8-CAN-RX CAN tranceiver, Header 2H
PB8-C-DO_0 Camera (P9)
96 PB9 PB9-CAN-TX CAN tranceiver, Header 2H
PB9-C-DO_1 Camera (P9)
97 PE0 PE0-C-RRST Camera (P9)
98 PE1 PE1-FSMC_NBL1 2.4" TFT + Touchscreen
99 VSS_3 DGND
100 VDD_3 3V3
Development Environment
=======================
Either Linux or Cygwin on Windows can be used for the development environment.
The source has been built only using the GNU toolchain (see below). Other
toolchains will likely cause problems. Testing was performed using the Cygwin
environment because the CodeSourcery Toolchain.
GNU Toolchain Options
=====================
Toolchain Configurations
------------------------
The NuttX make system has been modified to support the following different
toolchain options.
1. The CodeSourcery GNU toolchain,
2. The Atollic Toolchain,
3. The devkitARM GNU toolchain,
4. Raisonance GNU toolchain, or
5. The NuttX buildroot Toolchain (see below).
Most testing has been conducted using the CodeSourcery toolchain for Windows and
that is the default toolchain in most configurations. To use the Atollic,
devkitARM, Raisonance GNU, or NuttX buildroot toolchain, you simply need to
add one of the following configuration options to your .config (or defconfig)
file:
CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery under Windows
CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYL=y : CodeSourcery under Linux
CONFIG_ARMV7M_TOOLCHAIN_ATOLLIC=y : The Atollic toolchain under Windows
CONFIG_ARMV7M_TOOLCHAIN_DEVKITARM=y : devkitARM under Windows
CONFIG_ARMV7M_TOOLCHAIN_RAISONANCE=y : Raisonance RIDE7 under Windows
CONFIG_ARMV7M_TOOLCHAIN_BUILDROOT=y : NuttX buildroot under Linux or Cygwin (default)
If you change the default toolchain, then you may also have to modify the PATH in
the setenv.h file if your make cannot find the tools.
NOTE: the CodeSourcery (for Windows), Atollic, devkitARM, and Raisonance toolchains are
Windows native toolchains. The CodeSourcery (for Linux) and NuttX buildroot
toolchains are Cygwin and/or Linux native toolchains. There are several limitations
to using a Windows based toolchain in a Cygwin environment. The three biggest are:
1. The Windows toolchain cannot follow Cygwin paths. Path conversions are
performed automatically in the Cygwin makefiles using the 'cygpath' utility
but you might easily find some new path problems. If so, check out 'cygpath -w'
2. Windows toolchains cannot follow Cygwin symbolic links. Many symbolic links
are used in Nuttx (e.g., include/arch). The make system works around these
problems for the Windows tools by copying directories instead of linking them.
But this can also cause some confusion for you: For example, you may edit
a file in a "linked" directory and find that your changes had no effect.
That is because you are building the copy of the file in the "fake" symbolic
directory. If you use a Windows toolchain, you should get in the habit of
making like this:
make clean_context all
An alias in your .bashrc file might make that less painful.
The CodeSourcery Toolchain (2009q1)
-----------------------------------
The CodeSourcery toolchain (2009q1) does not work with default optimization
level of -Os (See Make.defs). It will work with -O0, -O1, or -O2, but not with
-Os.
The Atollic "Pro" and "Lite" Toolchain
--------------------------------------
One problem that I had with the Atollic toolchains is that the provide a gcc.exe
and g++.exe in the same bin/ file as their ARM binaries. If the Atollic bin/ path
appears in your PATH variable before /usr/bin, then you will get the wrong gcc
when you try to build host executables. This will cause to strange, uninterpretable
errors build some host binaries in tools/ when you first make.
The Atollic "Lite" Toolchain
----------------------------
The free, "Lite" version of the Atollic toolchain does not support C++ nor
does it support ar, nm, objdump, or objdcopy. If you use the Atollic "Lite"
toolchain, you will have to set:
CONFIG_HAVE_CXX=n
In order to compile successfully. Otherwise, you will get errors like:
"C++ Compiler only available in TrueSTUDIO Professional"
The make may then fail in some of the post link processing because of some of
the other missing tools. The Make.defs file replaces the ar and nm with
the default system x86 tool versions and these seem to work okay. Disable all
of the following to avoid using objcopy:
CONFIG_RRLOAD_BINARY=n
CONFIG_INTELHEX_BINARY=n
CONFIG_MOTOROLA_SREC=n
CONFIG_RAW_BINARY=n
devkitARM
---------
The devkitARM toolchain includes a version of MSYS make. Make sure that the
the paths to Cygwin's /bin and /usr/bin directories appear BEFORE the devkitARM
path or will get the wrong version of make.
IDEs
====
NuttX is built using command-line make. It can be used with an IDE, but some
effort will be required to create the project.
Makefile Build
--------------
Under Eclipse, it is pretty easy to set up an "empty makefile project" and
simply use the NuttX makefile to build the system. That is almost for free
under Linux. Under Windows, you will need to set up the "Cygwin GCC" empty
makefile project in order to work with Windows (Google for "Eclipse Cygwin" -
there is a lot of help on the internet).
Native Build
------------
Here are a few tips before you start that effort:
1) Select the toolchain that you will be using in your .config file
2) Start the NuttX build at least one time from the Cygwin command line
before trying to create your project. This is necessary to create
certain auto-generated files and directories that will be needed.
3) Set up include pathes: You will need include/, arch/arm/src/stm32,
arch/arm/src/common, arch/arm/src/armv7-m, and sched/.
4) All assembly files need to have the definition option -D __ASSEMBLY__
on the command line.
Startup files will probably cause you some headaches. The NuttX startup file
is arch/arm/src/stm32/stm32_vectors.S. You many have to build NuttX
one time from the Cygwin command line in order to obtain the pre-built
startup object needed by an IDE.
NuttX EABI "buildroot" Toolchain
================================
A GNU GCC-based toolchain is assumed. The files */setenv.sh should
be modified to point to the correct path to the Cortex-M3 GCC toolchain (if
different from the default in your PATH variable).
If you have no Cortex-M3 toolchain, one can be downloaded from the NuttX
Bitbucket download site (https://bitbucket.org/nuttx/buildroot/downloads/).
This GNU toolchain builds and executes in the Linux or Cygwin environment.
1. You must have already configured Nuttx in <some-dir>/nuttx.
cd tools
./configure.sh fire-stm32v2/<sub-dir>
2. Download the latest buildroot package into <some-dir>
3. unpack the buildroot tarball. The resulting directory may
have versioning information on it like buildroot-x.y.z. If so,
rename <some-dir>/buildroot-x.y.z to <some-dir>/buildroot.
4. cd <some-dir>/buildroot
5. cp configs/cortexm3-eabi-defconfig-4.6.3 .config
6. make oldconfig
7. make
8. Edit setenv.h, if necessary, so that the PATH variable includes
the path to the newly built binaries.
See the file configs/README.txt in the buildroot source tree. That has more
details PLUS some special instructions that you will need to follow if you are
building a Cortex-M3 toolchain for Cygwin under Windows.
NOTE: Unfortunately, the 4.6.3 EABI toolchain is not compatible with the
the NXFLAT tools. See the top-level TODO file (under "Binary loaders") for
more information about this problem. If you plan to use NXFLAT, please do not
use the GCC 4.6.3 EABI toochain; instead use the GCC 4.3.3 OABI toolchain.
See instructions below.
NuttX OABI "buildroot" Toolchain
================================
The older, OABI buildroot toolchain is also available. To use the OABI
toolchain:
1. When building the buildroot toolchain, either (1) modify the cortexm3-eabi-defconfig-4.6.3
configuration to use EABI (using 'make menuconfig'), or (2) use an exising OABI
configuration such as cortexm3-defconfig-4.3.3
2. Modify the Make.defs file to use the OABI conventions:
+CROSSDEV = arm-nuttx-elf-
+ARCHCPUFLAGS = -mtune=cortex-m3 -march=armv7-m -mfloat-abi=soft
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
-CROSSDEV = arm-nuttx-eabi-
-ARCHCPUFLAGS = -mcpu=cortex-m3 -mthumb -mfloat-abi=soft
-NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
NXFLAT Toolchain
================
If you are *not* using the NuttX buildroot toolchain and you want to use
the NXFLAT tools, then you will still have to build a portion of the buildroot
tools -- just the NXFLAT tools. The buildroot with the NXFLAT tools can
be downloaded from the NuttX Bitbucket download site
(https://bitbucket.org/nuttx/nuttx/downloads/).
This GNU toolchain builds and executes in the Linux or Cygwin environment.
1. You must have already configured Nuttx in <some-dir>/nuttx.
cd tools
./configure.sh lpcxpresso-lpc1768/<sub-dir>
2. Download the latest buildroot package into <some-dir>
3. unpack the buildroot tarball. The resulting directory may
have versioning information on it like buildroot-x.y.z. If so,
rename <some-dir>/buildroot-x.y.z to <some-dir>/buildroot.
4. cd <some-dir>/buildroot
5. cp configs/cortexm3-defconfig-nxflat .config
6. make oldconfig
7. make
8. Edit setenv.h, if necessary, so that the PATH variable includes
the path to the newly builtNXFLAT binaries.
DFU and JTAG
============
Enbling Support for the DFU Bootloader
--------------------------------------
The linker files in these projects can be configured to indicate that you
will be loading code using STMicro built-in USB Device Firmware Upgrade (DFU)
loader or via some JTAG emulator. You can specify the DFU bootloader by
adding the following line:
CONFIG_STM32_DFU=y
to your .config file. Most of the configurations in this directory are set
up to use the DFU loader.
If CONFIG_STM32_DFU is defined, the code will not be positioned at the beginning
of FLASH (0x08000000) but will be offset to 0x08003000. This offset is needed
to make space for the DFU loader and 0x08003000 is where the DFU loader expects
to find new applications at boot time. If you need to change that origin for some
other bootloader, you will need to edit the file(s) ld.script.dfu for the
configuration.
The DFU SE PC-based software is available from the STMicro website,
http://www.st.com. General usage instructions:
1. Convert the NuttX Intel Hex file (nuttx.hex) into a special DFU
file (nuttx.dfu)... see below for details.
2. Connect the M3 Wildfire board to your computer using a USB
cable.
3. Start the DFU loader on the M3 Wildfire board. You do this by
resetting the board while holding the "Key" button. Windows should
recognize that the DFU loader has been installed.
3. Run the DFU SE program to load nuttx.dfu into FLASH.
What if the DFU loader is not in FLASH? The loader code is available
inside of the Demo dirctory of the USBLib ZIP file that can be downloaded
from the STMicro Website. You can build it using RIDE (or other toolchains);
you will need a JTAG emulator to burn it into FLASH the first time.
In order to use STMicro's built-in DFU loader, you will have to get
the NuttX binary into a special format with a .dfu extension. The
DFU SE PC_based software installation includes a file "DFU File Manager"
conversion program that a file in Intel Hex format to the special DFU
format. When you successfully build NuttX, you will find a file called
nutt.hex in the top-level directory. That is the file that you should
provide to the DFU File Manager. You will end up with a file called
nuttx.dfu that you can use with the STMicro DFU SE program.
Enabling JTAG
-------------
If you are not using the DFU, then you will probably also need to enable
JTAG support. By default, all JTAG support is disabled but there NuttX
configuration options to enable JTAG in various different ways.
These configurations effect the setting of the SWJ_CFG[2:0] bits in the AFIO
MAPR register. These bits are used to configure the SWJ and trace alternate function I/Os. The SWJ (SerialWire JTAG) supports JTAG or SWD access to the
Cortex debug port. The default state in this port is for all JTAG support
to be disable.
CONFIG_STM32_JTAG_FULL_ENABLE - sets SWJ_CFG[2:0] to 000 which enables full
SWJ (JTAG-DP + SW-DP)
CONFIG_STM32_JTAG_NOJNTRST_ENABLE - sets SWJ_CFG[2:0] to 001 which enable
full SWJ (JTAG-DP + SW-DP) but without JNTRST.
CONFIG_STM32_JTAG_SW_ENABLE - sets SWJ_CFG[2:0] to 010 which would set JTAG-DP
disabled and SW-DP enabled
The default setting (none of the above defined) is SWJ_CFG[2:0] set to 100
which disable JTAG-DP and SW-DP.
OpenOCD
=======
I have also used OpenOCD with the M3 Wildfire. In this case, I used
the Olimex USB ARM OCD. See the script in configs/fire-stm32v2/tools/oocd.sh
for more information. Using the script:
1) Start the OpenOCD GDB server
cd <nuttx-build-directory>
configs/fire-stm32v2/tools/oocd.sh $PWD
2) Load Nuttx
cd <nuttx-built-directory>
arm-none-eabi-gdb nuttx
gdb> target remote localhost:3333
gdb> mon reset
gdb> mon halt
gdb> load nuttx
3) Running NuttX
gdb> mon reset
gdb> c
LEDs
====
The M3 Wildfire has 3 LEDs labeled LED1, LED2 and LED3. These LEDs are not
used by the NuttX 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_autoleds.c.
The LEDs are used to encode OS-related events as follows:
/* LED1 LED2 LED3 */
#define LED_STARTED 0 /* OFF OFF OFF */
#define LED_HEAPALLOCATE 1 /* ON OFF OFF */
#define LED_IRQSENABLED 2 /* OFF ON OFF */
#define LED_STACKCREATED 3 /* OFF OFF OFF */
#define LED_INIRQ 4 /* NC NC ON (momentary) */
#define LED_SIGNAL 5 /* NC NC ON (momentary) */
#define LED_ASSERTION 6 /* NC NC ON (momentary) */
#define LED_PANIC 7 /* NC NC ON (2Hz flashing) */
#undef LED_IDLE /* Sleep mode indication not supported */
RTC
===
The STM32 RTC may configured using the following settings.
CONFIG_RTC - Enables general support for a hardware RTC. Specific
architectures may require other specific settings.
CONFIG_RTC_HIRES - The typical RTC keeps time to resolution of 1
second, usually supporting a 32-bit time_t value. In this case,
the RTC is used to &quot;seed&quot; the normal NuttX timer and the
NuttX timer provides for higher resoution time. If CONFIG_RTC_HIRES
is enabled in the NuttX configuration, then the RTC provides higher
resolution time and completely replaces the system timer for purpose of
date and time.
CONFIG_RTC_FREQUENCY - If CONFIG_RTC_HIRES is defined, then the
frequency of the high resolution RTC must be provided. If CONFIG_RTC_HIRES
is not defined, CONFIG_RTC_FREQUENCY is assumed to be one.
CONFIG_RTC_ALARM - Enable if the RTC hardware supports setting of an alarm.
A callback function will be executed when the alarm goes off
In hi-res mode, the STM32 RTC operates only at 16384Hz. Overflow interrupts
are handled when the 32-bit RTC counter overflows every 3 days and 43 minutes.
A BKP register is incremented on each overflow interrupt creating, effectively,
a 48-bit RTC counter.
In the lo-res mode, the RTC operates at 1Hz. Overflow interrupts are not handled
(because the next overflow is not expected until the year 2106.
WARNING: Overflow interrupts are lost whenever the STM32 is powered down. The
overflow interrupt may be lost even if the STM32 is powered down only momentarily.
Therefore hi-res solution is only useful in systems where the power is always on.
M3 Wildfire-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_STM32
CONFIG_ARCH_CHIP_STM32F103VE
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=fire-stm32v2 (for the M3 Wildfire development board)
CONFIG_ARCH_BOARD_name - For use in C code
CONFIG_ARCH_BOARD_FIRE_STM32V2=y (Version 2)
CONFIG_ARCH_BOARD_FIRE_STM32V3=y (Version 3)
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=0x00010000 (64Kb)
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_LEDS - Use LEDs to show state. Unique to board architecture.
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_DMA1
CONFIG_STM32_DMA2
CONFIG_STM32_CRC
CONFIG_STM32_FSMC
CONFIG_STM32_SDIO
APB1
----
CONFIG_STM32_TIM2
CONFIG_STM32_TIM3
CONFIG_STM32_TIM4
CONFIG_STM32_TIM5
CONFIG_STM32_TIM6
CONFIG_STM32_TIM7
CONFIG_STM32_WWDG
CONFIG_STM32_IWDG
CONFIG_STM32_SPI2
CONFIG_STM32_SPI4
CONFIG_STM32_USART2
CONFIG_STM32_USART3
CONFIG_STM32_UART4
CONFIG_STM32_UART5
CONFIG_STM32_I2C1
CONFIG_STM32_I2C2
CONFIG_STM32_USB
CONFIG_STM32_CAN1
CONFIG_STM32_BKP
CONFIG_STM32_PWR
CONFIG_STM32_DAC1
CONFIG_STM32_DAC2
CONFIG_STM32_USB
APB2
----
CONFIG_STM32_ADC1
CONFIG_STM32_ADC2
CONFIG_STM32_TIM1
CONFIG_STM32_SPI1
CONFIG_STM32_TIM8
CONFIG_STM32_USART1
CONFIG_STM32_ADC3
Timer and I2C devices may need to the following to force power to be applied
unconditionally at power up. (Otherwise, the device is powered when it is
initialized).
CONFIG_STM32_FORCEPOWER
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,..,8
CONFIG_STM32_TIMn_ADC Reserve timer n for use by ADC, n=1,..,8
CONFIG_STM32_TIMn_ADCm Reserve timer n to trigger ADCm, n=1,..,8, m=1,..,3
CONFIG_STM32_TIMn_DAC Reserve timer n for use by DAC, n=1,..,8
CONFIG_STM32_TIMn_DACm Reserve timer n to trigger DACm, n=1,..,8, 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.
Alternate pin mappings. The M3 Wildfire board requires only CAN1 remapping
On the M3 Wildfire board pin PB9 is wired as TX and pin PB8 is wired as RX.
Which then makes the proper connection through the CAN transiver SN65HVD230
out to the CAN D-type 9-pn male connector where pin 2 is CANL and pin 7 is CANH.
CONFIG_STM32_TIM1_FULL_REMAP
CONFIG_STM32_TIM1_PARTIAL_REMAP
CONFIG_STM32_TIM2_FULL_REMAP
CONFIG_STM32_TIM2_PARTIAL_REMAP_1
CONFIG_STM32_TIM2_PARTIAL_REMAP_2
CONFIG_STM32_TIM3_FULL_REMAP
CONFIG_STM32_TIM3_PARTIAL_REMAP
CONFIG_STM32_TIM4_REMAP
CONFIG_STM32_USART1_REMAP
CONFIG_STM32_USART2_REMAP
CONFIG_STM32_USART3_FULL_REMAP
CONFIG_STM32_USART3_PARTIAL_REMAP
CONFIG_STM32_SPI1_REMAP
CONFIG_STM32_SPI3_REMAP
CONFIG_STM32_I2C1_REMAP
CONFIG_STM32_CAN1_REMAP1
CONFIG_STM32_CAN1_REMAP2
CONFIG_STM32_CAN2_REMAP
JTAG Enable settings (by default JTAG-DP and SW-DP are disabled):
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
STM32F103Z 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
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.
CONFIG_STM32_SDIO_DMA - Support DMA data transfers. Requires
CONFIG_STM32_SDIO and CONFIG_STM32_DMA2.
CONFIG_STM32_SDIO_PRI - Select SDIO interrupt prority. 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.
M3 Wildfire 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_CAN1_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN1 is defined.
CONFIG_CAN2_BAUD - CAN1 BAUD rate. Required if CONFIG_STM32_CAN2 is defined.
CONFIG_CAN_TSEG1 - The number of CAN time quanta in segment 1. Default: 6
CONFIG_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.
M3 Wildfire LCD Hardware Configuration
CONFIG_LCD_LANDSCAPE - Define for 320x240 display "landscape"
support. Default is this 320x240 "landscape" orientation
(this setting is informative only... not used).
CONFIG_LCD_PORTRAIT - Define for 240x320 display "portrait"
orientation support. In this orientation, the M3 Wildfire's
LCD ribbon cable is at the bottom of the display. Default is
320x240 "landscape" orientation.
CONFIG_LCD_RPORTRAIT - Define for 240x320 display "reverse
portrait" orientation support. In this orientation, the
M3 Wildfire's LCD ribbon cable is at the top of the display.
Default is 320x240 "landscape" orientation.
CONFIG_LCD_BACKLIGHT - Define to support a backlight.
CONFIG_LCD_PWM - If CONFIG_STM32_TIM1 is also defined, then an
adjustable backlight will be provided using timer 1 to generate
various pulse widthes. The granularity of the settings is
determined by CONFIG_LCD_MAXPOWER. If CONFIG_LCD_PWM (or
CONFIG_STM32_TIM1) is not defined, then a simple on/off backlight
is provided.
CONFIG_LCD_RDSHIFT - When reading 16-bit gram data, there appears
to be a shift in the returned data. This value fixes the offset.
Default 5.
The LCD driver dynamically selects the LCD based on the reported LCD
ID value. However, code size can be reduced by suppressing support for
individual LCDs using:
CONFIG_STM32_AM240320_DISABLE
CONFIG_STM32_SPFD5408B_DISABLE
Configurations
==============
Each M3 Wildfire configuration is maintained in a sub-directory and
can be selected as follow:
cd tools
./configure.sh fire-stm32v2/<subdir>
cd -
. ./setenv.sh
Where <subdir> is one of the following:
nsh
---
Configure the NuttShell (nsh) located at examples/nsh. The nsh configuration
contains support for some built-in applications that can be enabled by making
some additional minor change to the configuration file.
Reconfiguring: This configuration uses to the kconfig-mconf configuration tool
to control the configuration. See the section entitled "NuttX Configuration
Tool" in the top-level README.txt file.
Start Delays: If no SD card is present in the slot, or if the network is not
connected, then there will be long start-up delays before you get the NSH
prompt. If I am focused on ENC28J60 debug, I usually disable MMC/SD so that
I don't have to bother with the SD card:
CONFIG_STM32_SDIO=n
CONFIG_MMCSD=n
STATUS: The board port is basically functional. Not all features have been
verified. The ENC28J60 network is not yet functional. Networking is
enabled by default in this configuration for testing purposes. To use this
configuration, the network must currently be disabled. To do this using
the kconfig-mconf configuration tool:
> make menuconfig
Then de-select "Networking Support" -> "Networking Support"
UPDATE: The primary problem with the ENC29J60 is a v2 board issue: The
SPI FLASH and the ENC28J60 shared the same SPI chip select signal (PA4-SPI1-NSS).
In order to finish the debug of the ENC28J60, it may be necessary to lift
the SPI FLASH chip select pin from the board.
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