#include "stm32f0xx.h"
void Delay_mS(int mTime);
void TIM3_IRQHandler(void);
/* Private macro */
/* Private variables */
int myTick=0;
/* Private function prototypes */
/* Private functions */
/***/
/**===========================================================================
**
** Abstract: main program
**
**===========================================================================
*/
int main(void)
{
RCC->AHBENR |= RCC_AHBENR_GPIOCEN;
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
GPIOC->MODER |= (GPIO_MODER_MODER8_0);
GPIOC->MODER |= (GPIO_MODER_MODER7_0);
TIM3->PSC =500 ; //
TIM3->ARR = 592; // Auto reload value 1000
TIM3->CR1 |= (0U << 4U); //up counting
TIM3->CR1 |= TIM_CR1_URS;
TIM3->DIER = TIM_DIER_UIE; // Enable update interrupt (timer level)
TIM3-> EGR |= TIM_EGR_UG; /* update counter */
//TIM3->CR1 = TIM_CR1_CEN; // Enable timer
NVIC_EnableIRQ(TIM3_IRQn); // Enable interrupt from TIM3 (NVIC level)
while (1) {
//
GPIOC->ODR |= (1U << 8U);
Delay_mS(1000);
GPIOC->ODR |= (0U << 8U);
Delay_mS(1000);
}
}
//=============================================================================
// mSec Delay function
//=============================================================================
void Delay_mS(int mTime)
{
TIM3->CR1 |= TIM_CR1_CEN;
myTick=0;
while(myTick < mTime);
TIM3->CR1 &= (0x0U << (0U));
}
//=============================================================================
// TIM3 Interrupt Handler
//=============================================================================
void TIM3_IRQHandler(void)
{
if(TIM3->SR & TIM_SR_UIF) // if UIF flag is set
{
TIM3->SR &= ~TIM_SR_UIF; // clear UIF flag
myTick++;
}
}
