stm32f103一个按键控制多个模式切换
时间: 2023-08-12 10:06:41 浏览: 1894
对于STM32F103控制器,你可以使用一个按键来实现多个模式的切换。以下是一个简单的示例代码,演示了如何使用一个按键切换不同的模式:
```c
#include "stm32f10x.h"
#define BUTTON_PIN GPIO_Pin_0
#define BUTTON_PORT GPIOA
#define MODE1 0
#define MODE2 1
#define MODE3 2
uint8_t currentMode = MODE1;
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = BUTTON_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(BUTTON_PORT, &GPIO_InitStructure);
}
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void EXTI0_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line0) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line0);
// 切换模式
switch (currentMode)
{
case MODE1:
// 执行模式1的操作
break;
case MODE2:
// 执行模式2的操作
break;
case MODE3:
// 执行模式3的操作
break;
}
// 更新当前模式
currentMode++;
if (currentMode > MODE3)
{
currentMode = MODE1;
}
}
}
int main(void)
{
GPIO_Configuration();
EXTI_Configuration();
while (1)
{
// 主循环中执行其他任务
}
}
```
在上面的示例代码中,我们使用了一个按键连接到PA0引脚。首先,我们需要进行GPIO和EXTI的配置。然后,在`EXTI0_IRQHandler`中,我们检测到按键的按下事件,根据当前模式执行相应的操作,并更新当前模式。
你可以根据自己的需求修改代码,添加不同模式下的操作。另外,记得根据你的硬件连接修改引脚和端口的定义。
阅读全文
相关推荐















