#include "stm32c0xx.h"   


void SystemClock_Config(void);
void myDelay(int ms);
int main(void)
	
{
	RCC -> IOPENR |= (1UL << 1);
	GPIOB -> MODER &=~(3UL<<14);
	GPIOB ->MODER |= (1UL<<14);
	GPIOB ->OTYPER &=~(1UL<<7);
	
  SystemClock_Config();
  SystemCoreClockUpdate();

  
	while(1)
	{
	 
		GPIOB ->ODR ^= (1UL<<7);
    myDelay(500);
		
	}
	

}

void SystemClock_Config(void)
{
  // Initialize the RCC Oscillators
  RCC->CR |= (1 << 8);  // Enable HSI
  while (!(RCC->CR & (1 << 10)));  // Wait for HSI to stabilize

  RCC->CR &= ~(7<<11);
  RCC->CR &= ~(7<<5);


  RCC->CFGR &= ~(0x7 << 0);  // Clear SW bits
 // RCC->CFGR |= (0x1 << 0);

  // Configure the Flash latency
  FLASH->ACR |= (0x1 << 0);  // Set the appropriate latency value

  // Configure the AHB and APB clocks
  RCC->CFGR &= ~(0xF << 8);   // Clear HPRE and PPRE bits
  RCC->CFGR &= ~(0x7 << 12);
 // RCC->CFGR |= (0x0 << 4) | (0x4 << 8); 

  // Update the SystemCoreClock variable (optional but recommended)

}

void myDelay(int ms)
{
	  SysTick->CTRL=0;
		SysTick->LOAD = 48000-1;
    SysTick->VAL =0;
    SysTick->CTRL = 5;
    for(int i=0;i<ms;i++){ 
   while((SysTick->CTRL & (1<<16))==0) {}
     }
}