STIM32F10x单片机按键button控制流水灯代码

ID:1036885 · 发表于 2022-6-25 10:46

通过TIM2定时器中断控制LED流水灯的闪烁时间，并且增加两个按键PA1、PA2，其中PA1控制LED流水灯的启动，8个灯先依次闪烁，时间间隔1s,然后8个灯同时闪烁且时间间隔1s,PA2控制停止，使定时器不工作，将灯保持现在状态，过程非常简单，只需几分钟搞懂。
电路原理图如下：

单片机源程序如下:

#include "stm32f10x.h"
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
void TIM2_Config(void);//定时器TIM2配置函数
void EXTI1_EXTI2_Config(void);//按键PA1、PA2中断配置函数
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1|GPIO_Pin_2| GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
TIM2_Config();
EXTI1_EXTI2_Config();
GPIOC->ODR=0x00ff;
while (1)
{
}
}
void TIM2_Config(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);//proteus中的bug，用其他定时器，必须先使能TIM1。
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 1000;//基准为0.1ms，所以设置10000，刚好0.1ms乘以10000为1s。
TIM_TimeBaseStructure.TIM_Prescaler = 799;//我们设置的proteus中系统时钟为8M，所以这里设置799，我们时间间隔为1s。
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
// TIM_Cmd(TIM2, ENABLE);不是使能TIM2，因为用中断，所以在PA1、PA2中断函数中分别使能和不使能。
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);//定时器中断使能。
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void EXTI1_EXTI2_Config(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource1);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource2);
EXTI_InitStructure.EXTI_Line = EXTI_Line1|EXTI_Line2;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

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