minimal blink exmaple for the otterpill with platformio and the stm32cube-hal

Otterpill-Blink.md

About

I looked into PlatformIO usage with the STM32 series after going thorugh Jan Hendrik's Otterpill workshop. This is the absolutely minimal blink exmaple.

It remains unclear to me how or if I could use a configuration that was generated with CubeMX in a PlatformIO project.
See Using STM32CubeMX with PlatformIO (archive) on how to import CubeMX configuration into your project or use stm32pio.

Usage

• Create the files platformio.ini and src/main.c from the sources above.
• Hold down the DFU button on your Otterpill when you plug it in to enter DFU download mode.
• Run pio run -t upload.

Docs

• STM32Cube Framework Documentation
• STM32F072x8 Datasheet

platformio.ini

; not exactly the correct board but *close enough*
; the ..RBTx only has more io
[env:otterpill]
platform = ststm32
board = disco_f072rb
framework = stm32cube
upload_protocol = dfu

src--main.c

// blink example from platformio/platform-ststm32:
// https://github.com/platformio/platform-ststm32/tree/master/examples/stm32cube-hal-blink

#include "stm32f0xx_hal.h"

// led on otterpill is on pin 13 of port B
#define LED_PIN                                GPIO_PIN_13
#define LED_GPIO_PORT                          GPIOB
#define LED_GPIO_CLK_ENABLE()                  __HAL_RCC_GPIOB_CLK_ENABLE()

int main(void)
{
  HAL_Init();
  
  LED_GPIO_CLK_ENABLE();
  
  GPIO_InitTypeDef GPIO_InitStruct;
  
  GPIO_InitStruct.Pin = LED_PIN;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(LED_GPIO_PORT, &GPIO_InitStruct); 

  while (1)
  {
    HAL_GPIO_TogglePin(LED_GPIO_PORT, LED_PIN);
    
    HAL_Delay(1000);
  }
}

void SysTick_Handler(void)
{
  HAL_IncTick();
}

void NMI_Handler(void)
{
}

void HardFault_Handler(void)
{
  while (1) {}
}


void MemManage_Handler(void)
{
  while (1) {}
}

void BusFault_Handler(void)
{
  while (1) {}
}

void UsageFault_Handler(void)
{
  while (1) {}
}

void SVC_Handler(void)
{
}


void DebugMon_Handler(void)
{
}

void PendSV_Handler(void)
{
}