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Dobrica Pavlinušić's random unstructured stuff
Blue Pill
serial-speed.diff

stm32f103 board

arduino boot loader

triple usb serial

Function Pin and Port
USART3 TX PB10
USART3 RX PB11
USART2 TX PA2
USART2 RX PA3
USART1 TX PA9
USART1 RX PA10

USART TX pin RX pin special speed sensor linux
3 PB10 PB11   9600 MH-Z19B /dev/ttyACM1
2 PA2 PA3   9600    
1 PA9 PA10 BOOT=0 9600    

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

 

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