main.c for stm32/example/04-tim6

/**
 * Main code of firmware
 */
#include "stm32f10x.h"
#include "core_cm3.h"
#include "main.h"
/* user status flag */
volatile unsigned char status_flag;
void main();
/* Main function */
void main(void) {
        //status_flag = 0;
        /* setup i/o port c */
        RCC->APB2ENR |= RCC_APB2ENR_IOPCEN;
        LED_PORT->CRH |= GPIO_CRH_MODE8_0 | GPIO_CRH_MODE9_0;
        LED_PORT->CRH &= ~(GPIO_CRH_CNF8 | GPIO_CRH_CNF9);
        /* setup i/o port a */
        RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_AFIOEN;
        /* setup AFIO andEXTI */
        AFIO->EXTICR[0] |= AFIO_EXTICR1_EXTI0_PA;
        EXTI->IMR |= (1 << 0);
        EXTI->FTSR |= (1 << 0);
        /* setup TIM6 */
        RCC->APB1ENR |= RCC_APB1ENR_TIM6EN;
        TIM6->PSC = 8000 - 1;
        TIM6->ARR = 1000;
        TIM6->DIER |= TIM_DIER_UIE;
        /* enable TIM6 */
        TIM6->CR1 |= TIM_CR1_CEN;
        /* enable TIM6_DAC interrupt */
        NVIC_EnableIRQ(TIM6_DAC_IRQn);
        /* enable EXTI0 interrupt */
        NVIC_EnableIRQ(EXTI0_IRQn);
        /* enable leds */
        LED_PORT->ODR = LED_BLUE | LED_GREEN;
        /* infinity loop */
        while (1);
}