#include "stm32f10x.h"
static __IO uint32_t TimingDelay; //__IO为volatile的宏定义
int8_t LED_Flag = 1; //LED灯翻转标志位
void GPIO_Config(void);
void EXIT_Config(void);
void TIM_Config(void);
void NVIC_Config(void);
void Delay(__IO uint32_t nTime);
main ()
{
GPIO_Config();
EXIT_Config();
TIM_Config();
NVIC_Config();
if (SysTick_Config(SystemCoreClock / 1000))
{
while (1);
}
while (1)
{
if (LED_Flag != 1)
{
GPIO_SetBits(GPIOG, GPIO_Pin_6); //setbits使能IO，当前下指输出（此时为灭）
}
else
{
GPIO_ResetBits(GPIOG, GPIO_Pin_6); //Resetbits屏蔽IO，当前下指不输出（此时为亮）
}
}
}
void GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG | RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //指定第六引脚
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; //模式为输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //频率为快速
GPIO_Init(GPIOG, &GPIO_InitStructure); //调用IO初始化函数
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //指定第六引脚
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; //模式为输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //频率为快速
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //网上说要上拉，稳定，我的没有上拉也可以
GPIO_Init(GPIOA, &GPIO_InitStructure); //调用IO初始化函数
}
void EXIT_Config(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); //使能外部中断复用时钟
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, GPIO_PinSource0);//选择GPIOA的Pin0为EXTILine0
EXTI_ClearITPendingBit(EXTI_Line0); //清外部线路0中断
EXTI_InitStructure.EXTI_Line = EXTI_Line0; //线路0
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //触发模式为中断
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //开外部中断
EXTI_Init(&EXTI_InitStructure);
}
void TIM_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
TIM_DeInit(TIM2);
TIM_TimeBaseStructure.TIM_Period = 10000;
TIM_TimeBaseStructure.TIM_Prescaler = 8400;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ClearFlag(TIM2, TIM_FLAG_Update);
TIM_ITConfig(TIM2, TIM_IT_Update,ENABLE);
TIM_Cmd(TIM2, ENABLE);
}
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //嵌套分组为组0,均为响应优先级
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; //中断通道为通道0
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢断优先级为0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //开中断
NVIC_Init(&NVIC_InitStructure);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void Delay(__IO uint32_t nTime)
{
TimingDelay = nTime;
while (TimingDelay != 0);
}
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}
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