芯片：STM32F103GCT6
原理图：
实现：PC6——闪烁，PC7——常亮
main.c
//头文件
#include "stm32f10x.h"
#include "user.h"//全局变量
uint8_t g_1s_flag = 0;
uint8_t g_uart1_rx_done = 0;uint32_t g_ms = 0;
uint32_t g_s = 0;uint8_t g_uart1_rx_buff[256] = {0};uint16_t Compare = 0;void User_tick_timer_handler(void)
{g_ms++;if((g_ms%500) == 0){if(PCin(13) == 1){PCout(13) = 0;}else{PCout(13) = 1;}}if((g_ms%1000) == 0){g_s++;g_1s_flag = 1;}
}
/******************************************************************************
* 函数名称：main
* 功能概要：主函数
* 参数说明：无
* 函数返回：无
******************************************************************************/
int main(void)
{Delay_init(); //定时器延时初始化
// Usart1_init(9600); //Uart1初始化
// NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级GPIO_Configuration(); //IO配置
// TIM2_init(999, 71); //TIM2初始化，arr = 定时us*[72/(psc+1)]-1，这里定时1000usTIM3_init(); //TIM3初始化，arr = 定时us*[72/(psc+1)]-1，这里定时50us
// delay_ms(10); GPIO_SetBits(GPIOC, GPIO_Pin_7 ); while(1){GPIO_ResetBits(GPIOC, GPIO_Pin_7 ); }
}
user.c
/******************************************************************************* Source code file of user.c
******************************************************************************/
#include "user.h"/******************************************************************************
* 函数名称：GPIO_Configuration
* 功能概要：GPIO初始化
* 参数说明：无
* 函数返回：无
******************************************************************************/
void GPIO_Configuration(void)
{GPIO_InitTypeDef GPIO_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);
//==============
// LED01 -> PC7 LED02 -> PC6
//==============GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_6;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure);
}/******************************************************************************
* 函数名称：TIM3_init
* 功能概要：定时器3初始化
* 参数说明：arr - 自动重装值
* psc - 时钟预分频数
* 函数返回：无
* 备注： 这里时钟选择为APB1的2倍，而APB1为36M
******************************************************************************/
void TIM3_init(void )
{TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;NVIC_InitTypeDef NVIC_InitStructure;TIM_OCInitTypeDef TIM_OCInitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能//定时器TIM3初始化TIM_TimeBaseStructure.TIM_Period =1000-1; TIM_TimeBaseStructure.TIM_Prescaler =7200-1; //设置用来作为TIMx时钟频率除数的预分频值TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_timTIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式TIM_TimeBaseStructure.TIM_RepetitionCounter=0;TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位// TIM_ClearFlag(TIM3,TIM_FLAG_Update);/* Channel 1, 2,3 and 4 Configuration in PWM mode */TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//输出模式1:占空比模式TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;TIM_OCInitStructure.TIM_Pulse = 0;TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;TIM_OC1Init(TIM3, &TIM_OCInitStructure);/*中断优先级NVIC设置*/NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //先占优先级1级NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //从优先级1级NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能IRQ通道NVIC_Init(&NVIC_InitStructure); //初始化NVIC寄存器TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE ); //使能TIMx指定的中断
// TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
// TIM_ARRPreloadConfig(TIM3, ENABLE);GPIO_SetBits(GPIOC, GPIO_Pin_6); //LED初始化TIM_Cmd(TIM3, ENABLE); //使能TIMx
}void TIM3_IRQHandler(void)
{if(TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查TIM3更新中断发生与否{GPIO_WriteBit(GPIOC,GPIO_Pin_6,(BitAction)(1-(GPIO_ReadOutputDataBit(GPIOC,GPIO_Pin_6)))); //取反PB.1TIM_ClearITPendingBit(TIM3, TIM_IT_Update); //清除TIMx更新中断标志 }
}
/******************************************************************************* End of file
******************************************************************************/
