I added this to the platformio.ini file:
[env:genericSTM32F103C8]
platform = ststm32
framework = cmsis
upload_protocol = cmsis-dap
board = genericSTM32F103C8
And then I hooked up my CMSIS-DAP probe to the Blue Pill, and gave it a try:
ppelleti@patrick64:~/src/platform-ststm32/examples/cmsis-blink$ pio run -e genericSTM32F103C8 --target upload
Processing genericSTM32F103C8 (platform: ststm32; framework: cmsis; board: genericSTM32F103C8)
--------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/ststm32/genericSTM32F103C8.html
PLATFORM: ST STM32 (12.1.1) > STM32F103C8 (20k RAM. 64k Flash)
HARDWARE: STM32F103C8T6 72MHz, 20KB RAM, 64KB Flash
DEBUG: Current (blackmagic) External (blackmagic, cmsis-dap, jlink, stlink)
PACKAGES:
- framework-cmsis 2.50501.200527 (5.5.1)
- framework-cmsis-stm32f1 4.3.1
- tool-dfuutil 1.9.200310
- tool-ldscripts-ststm32 0.1.0
- tool-openocd 2.1000.200630 (10.0)
- tool-stm32duino 1.0.1
- toolchain-gccarmnoneeabi 1.70201.0 (7.2.1)
Warning! Cannot find a linker script for the required board! An auto-generated script will be used to link firmware!
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 0 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Compiling .pio/build/genericSTM32F103C8/FrameworkCMSIS/gcc/startup_stm32f103xb.o
Compiling .pio/build/genericSTM32F103C8/FrameworkCMSIS/system_stm32f1xx.o
Compiling .pio/build/genericSTM32F103C8/src/main.o
Linking .pio/build/genericSTM32F103C8/firmware.elf
Checking size .pio/build/genericSTM32F103C8/firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [ ] 0.1% (used 28 bytes from 20480 bytes)
Flash: [ ] 0.6% (used 396 bytes from 65536 bytes)
Configuring upload protocol...
AVAILABLE: blackmagic, cmsis-dap, dfu, jlink, serial, stlink
CURRENT: upload_protocol = cmsis-dap
Uploading .pio/build/genericSTM32F103C8/firmware.elf
xPack OpenOCD, x86_64 Open On-Chip Debugger 0.10.0+dev-00378-ge5be992df (2020-06-26-09:27)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
debug_level: 1
swd
in procedure 'program'
** OpenOCD init failed **
shutdown command invoked
*** [upload] Error 1
========================== [FAILED] Took 1.31 seconds ==========================
Environment Status Duration
------------------ -------- ------------
genericSTM32F103C8 FAILED 00:00:01.311
==================== 1 failed, 0 succeeded in 00:00:01.311 ====================
So it still fails, although the error message is a little bit different than when using the ST-Link probe.
I know the CMSIS-DAP probe works, because I’ve used it many times with ATSAMD MCUs. (Though I haven’t used it with PlatformIO before.)
So either there’s something in my setup that’s preventing both the ST-Link and the CMSIS-DAP from working, or else my Blue Pill is remarkably resistant to being programmed with SWD.
I have more Blue Pills I could try. (Although they were all purchased at the same time from the same vendor on AliExpress.)
Besides trying another Blue Pill, is there anything else I should try?