Complete instructions here running in windows
Code from here https://github.com/RAKWireless/RAK811_BreakBoard then adapted to platformio
The earlier versions of the board only had 16K ram so stm32l15xx6.ld is default as linker script. If you want to use the full 32K ram you can change this line before copy "ldscript": "/home/olof/rak/STM32L151XBA_FLASH.ld"
Note, This step is not necessary as we have added boards_dir = . to platformio.ini
If you use, platformio ide, press
1) Home button
2) Platforms/ST STM32 reveal button
cp rak811.json ~/.platformio/platforms/ststm32/boards/rak811.json
If you do not have this directory, .platformio/platforms/ststm32 try,
pio platform install ststm32
pio run
You can use the platformio, it comes with stlinkv2 Just move the BOOT strap one step, then
pio run --target upload --upload-port /dev/ttyUSB0
Or if you want in stm32flash_src there is code to flash the device. Build with make
./stm32flash -w .pioenvs/rak811/firmware.bin /dev/ttyUSB0
To reset and start after download, try
./stm32flash -w .pioenvs/rak811/firmware.bin -v -g 0x0 /dev/ttyUSB0
In linux, you can use this command to flash and capture output. ./stm32flash -w .pioenvs/rak811/firmware.bin -v -g 0x0 /dev/ttyUSB0 && pio device monitor --port /dev/ttyUSB0 --baud 115200 ./stm32flash -w .pioenvs/rak811/firmware.bin -v -g 0x0 /dev/ttyUSB0 && screen /dev/ttyUSB0 115200
In windows, try something like this pio run --target upload --upload-port COM15 stm32flash_src/stm32flash.exe -E -w .pioenvs/rak811/firmware.bin COM15
Now it starts and outputs debug information on UART,
Move Detected INT1 src:0x48
[Debug]: tempr: 35 Bat: 3988mv
[Debug]: ACC X:FF00 Y:0000 Z:FF00
GpsGetLatestGpsPositionDouble ret = 0
https://os.mbed.com/teams/Semtech/code/LoRaWAN-NAMote72-Application-Demo/
I have made a simple qemu board emulation and its possible to start and run in qemu, Read more here running in qemu
Interface serial_posix: 57600 8E1
Version : 0x31
Option 1 : 0x00
Option 2 : 0x00
Device ID : 0x0429 (STM32L1xxx6(8/B)A)
- RAM : 32KiB (4096b reserved by bootloader)
- Flash : 128KiB (size first sector: 16x256)
- Option RAM : 32b
- System RAM : 4KiB
You can checkout the original files and use this makefile to build, https://raw.githubusercontent.com/oguiter/RAK811_BreakBoard/master/Makefile I did this and ran the generated elf files in qemu. Read more amout this experiment here, Read more here running in parallell
The startup code should have been this, https://github.com/RAKWireless/RAK811_BreakBoard/tree/master/src/boards/RAK811BreakBoard/cmsis/arm-gcc/boards/RAK811BreakBoard/cmsis/startup_stm32l151xb.s
But instead .platformio/packages/framework-cmsis/variants/stm32l1/stm32l151xba/startup_stm32l151xba.S is used,
Only difference is that platformio has removed the call to __libc_init_array /bl __libc_init_array/ /* PlatformIO note: Will work without -nostartfiles */
Here you can read more about this, http://cs107e.github.io/guides/gcc/ https://www.embedded.com/design/mcus-processors-and-socs/4026075/Building-Bare-Metal-ARM-Systems-with-GNU-Part-2
The option -nostartfiles instructs the linker to not use the standard system startup functions nor link the code containing those functions.
The library function __libc_init_array invokes all C++ static constructors (see also the linker script). As we do not have any static c++ constructors this should not be a problem, but could be something to think about. If you patch the function to call , bl __libc_init_array then you might get an undefined reference to _init. https://answers.launchpad.net/gcc-arm-embedded/+question/224709
To use these you must #include "OBME280.h"
// After MCUInit()
i2c_bme280_begin();
float temp=i2c_bme280_read_temp();
float pressure=i2c_bme280_read_pressure();
float rh=i2c_bme280_read_rh();
printf("RH %2f Temp %2f , pressure %2f\r\n",rh,temp,pressure);
To force new readings you should use, i2c_bme280_force_readings();
Note that this uses the same i2c as the MEMS sensor. The 3 bottom pins is GND, SCL, SDA
screen /dev/ttyUSB0 115200
Allows flashing over wifi and single step the code with gdb https://github.com/Ebiroll/esp32_blackmagic
arm-none-eabi-gdb .pioenvs/rak811/firmware.elf
(gdb) target extended-remote 192.168.1.117:2345
(gdb) monitor swdp_scan
Tracing was added The directory swo and the file .gdbinit contains setup possibility (gdb) monitor traceswo
This is the default board to build for, change default env in platform.ini
It is possible to run this code on the WisTrio. (RAK5205) http://docs.rakwireless.com/en/LoRa/WisTrio-LoRa-RAK5205/Hardware_Specification/RAK5205_Product_Brief_V1.1.pdf
On the 30 Pin connector for 96 boards,
| Pin out No | Pin name | Desc |
|---|---|---|
| 9-10 | GND | GND |
| 17 | SWED_TMS | SWD_DATA |
| 18 | SWD_CLK | SWD_CLK |
arm-none-eabi-gdb .pioenvs/wistrio/firmware.elf -ex 'target extended-remote 192.168.1.117:2345'
(gdb) monitor swdp_scan
(gdb) attach 1
(gdb) load
(gdb) b main
(gdb) c