#include<stdio.h>
#include<stdint.h>
#include<stm32c031xx.h>
#define GPIOA_BASE  0x50000000
#define GPIOB_BASE  0x50000400 
#define RCC_BASE    0x40021000 
#define GPIOA_MODER (*(volatile uint32_t*)(GPIOA_BASE+0x00))
#define GPIOA_ODR   (*(volatile uint32_t*)(GPIOA_BASE+0x14))
#define GPIOB_MODER (*(volatile uint32_t*)(GPIOB_BASE+0x00))
#define GPIOB_ODR   (*(volatile uint32_t*)(GPIOB_BASE+0x14))
#define RCC_IOPENR (*(volatile uint32_t *)(RCC_BASE+0x34))
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, STM32!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}