// Insert compiler directives to set the optimization to zero
// We do not want the compiler to optimize out any code
#pragma GCC push_options
#pragma GCC optimize ("O0")

// Include the header file.
//  In STM32 microcontroller programming, the header files provided by the
//  manufacturer (STMicroelectronics) contain the necessary definitions,
//  constants, and function prototypes specific to the microcontroller's peripherals
//  and features.
#include "stm32c0xx.h"


// Include function declarations
void myDelay(unsigned int val);

uint32_t turnOn[]={0x0,0x1,0x2,0x3,0x20,0x21,0x22,0x23};
uint32_t counter = 0;

int main(void)
{
  RCC->IOPENR |= 1;
  GPIOA->MODER=0b10000010101;
  GPIOA->OTYPER=0x0;
  GPIOA->PUPDR=0x140;
  
  setup();

  while (1)
  {
   if(((GPIOA->IDR)&0x8) == 0){
      counter++;
      if(counter>7){
        counter=0;
      }
   }
   if(((GPIOA->IDR)&0x10) == 0){
      counter--;
      if(counter>9){
        counter = 7;
      }
   }
      
   GPIOA->BSRR = 0xFFFF0000;
   myDelay(2000);
   GPIOA->BSRR =turnOn[counter];
   myDelay(200000);
   
  }


}

// Add function definitions here
void myDelay(unsigned int val)
{
  int i;
  for (i = 0; i < val; i++);

}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, STM32 BERR CLASS!");
}