#include "stm32c031xx.h"

void my_delay(long count)
{
  while(count--){__asm("nop");}
}

int main(void)
{
  RCC->IOPENR |= (1<<0); //GPIOA LED
  RCC->IOPENR |= ()

  GPIOA -> MODER &= ~(3<<2); //PA1 clear
  GPIOA -> MODER |= (1<<2); //PA1 SET AS OUTPUT

  GPIOA -> OTYPER &= ~(1<<1); //push pull

  GPIOA -> OSPEEDR &= ~(3<<2); //very low speed

  while(1)
  {
    GPIOA->ODR ^= (1<<1);
    my_delay(1500000);
  }
}