stm32cubemx配置sem32f030k6实现按键输入的单击双击和长按功能及程序
时间: 2024-05-16 11:14:55 浏览: 103
首先,您需要在STM32CubeMX中配置GPIO口作为输入模式,以便检测按键状态。然后,您需要编写代码来检测按键状态并实现单击、双击和长按功能。
以下是一个简单的示例程序,其中PA0和PA1被配置为输入模式,PA0用于单击和双击功能,PA1用于长按功能。
```c
#include "stm32f0xx.h"
#define DEBOUNCE_TIME 50 // debounce time in milliseconds
#define LONG_PRESS_TIME 1000 // long press time in milliseconds
#define DOUBLE_PRESS_TIME 300 // double press time in milliseconds
volatile uint32_t button_state = 0;
volatile uint32_t button_ticks = 0;
volatile uint32_t button_press_ticks = 0;
volatile uint32_t button_release_ticks = 0;
void EXTI0_1_IRQHandler(void)
{
if (EXTI->PR & EXTI_PR_PR0)
{
EXTI->PR |= EXTI_PR_PR0; // clear interrupt flag
if (GPIOA->IDR & GPIO_IDR_0)
{
// button released
button_ticks = HAL_GetTick() - button_press_ticks;
if (button_ticks >= LONG_PRESS_TIME)
{
// long press detected
button_state = 2;
}
else if (button_ticks >= DOUBLE_PRESS_TIME)
{
// double press detected
button_state = 1;
}
else
{
// single press detected
button_state = 3;
}
button_release_ticks = HAL_GetTick();
}
else
{
// button pressed
button_press_ticks = HAL_GetTick();
}
}
}
int main(void)
{
// configure PA0 and PA1 as inputs with pull-up resistors
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
// enable EXTI0 and EXTI1 interrupts
EXTI->IMR |= EXTI_IMR_MR0 | EXTI_IMR_MR1;
EXTI->RTSR |= EXTI_RTSR_TR0 | EXTI_RTSR_TR1;
NVIC_EnableIRQ(EXTI0_1_IRQn);
while (1)
{
// check for long press
if (button_state == 2)
{
// long press action here
button_state = 0; // reset button state
}
// check for double press
if (button_state == 1 && (HAL_GetTick() - button_release_ticks) >= DOUBLE_PRESS_TIME)
{
// single press action here
button_state = 0; // reset button state
}
// check for single press
if (button_state == 3 && (HAL_GetTick() - button_release_ticks) >= DEBOUNCE_TIME)
{
// double press action here
button_state = 0; // reset button state
}
}
}
```
在此示例程序中,按键被认为是单击、双击或长按的状态。中断处理程序检测按键状态并将其保存在`button_state`变量中。主循环检测`button_state`变量以执行相应的操作。请注意,此示例程序仅演示了如何检测按键状态,您可能需要根据自己的要求进行修改。
阅读全文