stm32f103 board

arduino boot loader

• https://github.com/rogerclarkmelbourne/Arduino_STM32/wiki/Flashing-Bootloader-for-BluePill-Boards

triple usb serial

• https://satoshinm.github.io/blog/171223_stm32serial_triple_usb-to-serial_adapter_using_stm32_blue_pill.html
• https://github.com/satoshinm/pill_serial

dpavlin@nuc:/nuc/stm32/pill_serial$ cat flash.sh
sudo ../stlink/build/Release/st-flash write src/pill_serial.bin 0x08000000

lower serial speed to 9600 so we can use slow sensors on it: serial-speed.diff

openocd with raspberry pi

http://git.rot13.org/?p=openocd-rpi2-stm32;a=blob;f=openocd-rpi.txt

clones

https://github.com/thanks4opensource/buck50/issues/2

https://github.com/keirf/Greaseweazle/wiki/STM32-Fakes

dpavlin@nuc:/nuc/stm32/Greaseweazle$ wget https://github.com/keirf/Greaseweazle/releases/download/v0.22/Greaseweazle-v0.22.zip

dpavlin@nuc:/nuc/stm32/Greaseweazle$ unzip Greaseweazle-v0.22.zip Greaseweazle-v0.22/alt/Blinky_Test-v0.22.hex
Archive:  Greaseweazle-v0.22.zip
  inflating: Greaseweazle-v0.22/alt/Blinky_Test-v0.22.hex

write it to flash using openocd

> flash write_image erase /nuc/stm32/Greaseweazle/Greaseweazle-v0.22/alt/Blinky_Test-v0.22.hex 0 ihex
auto erase enabled
wrote 5120 bytes from file /nuc/stm32/Greaseweazle/Greaseweazle-v0.22/alt/Blinky_Test-v0.22.hex in 0.299529s (16.693 KiB/s)

serial output is on the programming interface at pins A9/TX and A10/RX: Not via the USB port!

pi@pihdmi:/nuc/stm32/buck50 $ microcom -p /dev/ttyUSB1
connected to /dev/ttyUSB1
Escape character: Ctrl-\
Type the escape character to get to the prompt.

** Blinky
** Blinky Test **
** Keir Fraser <keir.xen@gmail.com>
** https://github.com/keirf/Greaseweazle
Serial = ff48:0670:8967:5655:4740:6706
Flash Size  = 128kB
Device ID = 0x0000
Revision  = 0x0000
Testing I2C1... OK
Testing I2C2... OK
Testing SPI1... OK
Testing SPI2... OK
Testing TIM1... OK
Testing TIM2... OK
Testing TIM3... OK
Testing TIM4... OK
DMA Test #1... OK
DMA Test #2... OK
DMA Test #3... OK
DMA Test #4... OK
Testing 64kB Flash... OK
Enable TIM4 IRQ... .OK
Testing 20kB SRAM (endless loop)................................................................

After flashing this test, you will not be able to address blue pill using openocd.

To work-around this problem, I switched boot0 jumper, used stm32loader (after pressing reset button) to load alternative binary.