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简介
MultiButton 是一个小巧简单易用的事件驱动型按键驱动模块#xff0c;可无限量扩展按键#xff0c;按键事件的回调异步处理方式可以简化你的程序结构#xff0c;去除冗余的按键处理硬编码#xff0c;让你的按键业务逻辑更清晰。
使用方法
1.先申请一个…MultiButton
简介
MultiButton 是一个小巧简单易用的事件驱动型按键驱动模块可无限量扩展按键按键事件的回调异步处理方式可以简化你的程序结构去除冗余的按键处理硬编码让你的按键业务逻辑更清晰。
使用方法
1.先申请一个按键结构
struct Button button1;2.初始化按键对象绑定按键的GPIO电平读取接口read_button_pin() 后一个参数设置有效触发电平
button_init(button1, read_button_pin, 0, 0);3.注册按键事件
button_attach(button1, SINGLE_CLICK, Callback_SINGLE_CLICK_Handler);
button_attach(button1, DOUBLE_CLICK, Callback_DOUBLE_Click_Handler);
...4.启动按键
button_start(button1);5.设置一个5ms间隔的定时器循环调用后台处理函数
while(1) {...if(timer_ticks 5) {timer_ticks 0;button_ticks();}
}特性
MultiButton 使用C语言实现基于面向对象方式设计思路每个按键对象单独用一份数据结构管理
struct Button {uint16_t ticks;uint8_t repeat: 4;uint8_t event : 4;uint8_t state : 3;uint8_t debounce_cnt : 3;uint8_t active_level : 1;uint8_t button_level : 1;uint8_t button_id;uint8_t (*hal_button_Level)(uint8_t button_id_);BtnCallback cb[number_of_event];struct Button* next;
};这样每个按键使用单向链表相连依次进入 button_handler(struct Button* handle) 状态机处理所以每个按键的状态彼此独立。
按键事件
事件说明PRESS_DOWN按键按下每次按下都触发PRESS_UP按键弹起每次松开都触发PRESS_REPEAT重复按下触发变量repeat计数连击次数SINGLE_CLICK单击按键事件DOUBLE_CLICK双击按键事件LONG_PRESS_START达到长按时间阈值时触发一次LONG_PRESS_HOLD长按期间一直触发
Examples
#include button.hunit8_t btn1_id 0;struct Button btn1;uint8_t read_button_GPIO(uint8_t button_id)
{// you can share the GPIO read function with multiple Buttonsswitch(button_id){case btn1_id:return HAL_GPIO_ReadPin(B1_GPIO_Port, B1_Pin);break;default:return 0;break;}
}
void BTN1_PRESS_DOWN_Handler(void* btn)
{//do something...
}void BTN1_PRESS_UP_Handler(void* btn)
{//do something...
}...int main()
{button_init(btn1, read_button_GPIO, 0, btn1_id);button_attach(btn1, PRESS_DOWN, BTN1_PRESS_DOWN_Handler);button_attach(btn1, PRESS_UP, BTN1_PRESS_UP_Handler);button_attach(btn1, PRESS_REPEAT, BTN1_PRESS_REPEAT_Handler);button_attach(btn1, SINGLE_CLICK, BTN1_SINGLE_Click_Handler);button_attach(btn1, DOUBLE_CLICK, BTN1_DOUBLE_Click_Handler);button_attach(btn1, LONG_PRESS_START, BTN1_LONG_PRESS_START_Handler);button_attach(btn1, LONG_PRESS_HOLD, BTN1_LONG_PRESS_HOLD_Handler);button_start(btn1);//make the timer invoking the button_ticks() interval 5ms.//This function is implemented by yourself.__timer_start(button_ticks, 0, 5);while(1){}
}开源移植 STM32
源文件 main.c
#include stm32f10x.h
#include Delay.h
#include LED.h
#include KEY.h
#include multi_button.hint main()
{LED_Init(); // LED初始化KEY_Init(); // 按键初始化while (1){Delay_ms(5);button_ticks();// 按键运行}
} 源文件multi_button.c
/** Copyright (c) 2016 Zibin Zheng znbinqq.com* All rights reserved*/#include multi_button.h#define EVENT_CB(ev) if(handle-cb[ev])handle-cb[ev]((void*)handle)
#define PRESS_REPEAT_MAX_NUM 15 /*! The maximum value of the repeat counter *///button handle list head.
static struct Button* head_handle NULL;static void button_handler(struct Button* handle);/*** brief Initializes the button struct handle.* param handle: the button handle struct.* param pin_level: read the HAL GPIO of the connected button level.* param active_level: pressed GPIO level.* param button_id: the button id.* retval None*/
void button_init(struct Button* handle, u8(*pin_level)(u8), u8 active_level, u8 button_id)
{memset(handle, 0, sizeof(struct Button));handle-event (u8)NONE_PRESS;handle-hal_button_Level pin_level;handle-button_level handle-hal_button_Level(button_id);handle-active_level active_level;handle-button_id button_id;
}// /*button1 init*/
// button_init(btn1, read_button_GPIO, 0, KEY1_id); // 初始化按键结构体
// button_attach(btn1, SINGLE_CLICK, BTN1_SINGLE_CLICK_Handler); // 添加单击事件
// button_attach(btn1, DOUBLE_CLICK, BTN1_DOUBLE_CLICK_Handler); // 添加双击事件
// button_attach(btn1, LONG_PRESS_START, BTN1_LONG_PRESS_START_Handler); // 添加长按事件
// button_start(btn1); // 启动按键 /*** brief Attach the button event callback function.* param handle: the button handle struct.* param event: trigger event type.* param cb: callback function.* retval None*/
void button_attach(struct Button* handle, PressEvent event, BtnCallback7 cb)
{handle-cb[event] cb;
}/*** brief Inquire the button event happen.* param handle: the button handle struct.* retval button event.*/
PressEvent get_button_event(struct Button* handle)
{return (PressEvent)(handle-event);
}/*** brief Button driver core function, driver state machine.* param handle: the button handle struct.* retval None*/
static void button_handler(struct Button* handle)
{u8 read_gpio_level handle-hal_button_Level(handle-button_id);//ticks counter working..4if((handle-state) 0) handle-ticks;/*------------button debounce handle---------------*/if(read_gpio_level ! handle-button_level) { //not equal to prev one//continue read 3 times same new level changeif((handle-debounce_cnt) DEBOUNCE_TICKS) {handle-button_level read_gpio_level;handle-debounce_cnt 0;}} else { //level not change ,counter reset.handle-debounce_cnt 0;}/*-----------------State machine-------------------*/switch (handle-state) {case 0:if(handle-button_level handle-active_level) { //start press downhandle-event (u8)PRESS_DOWN;EVENT_CB(PRESS_DOWN);handle-ticks 0;handle-repeat 1;handle-state 1;} else {handle-event (u8)NONE_PRESS;}break;case 1:if(handle-button_level ! handle-active_level) { //released press uphandle-event (u8)PRESS_UP;EVENT_CB(PRESS_UP);handle-ticks 0;handle-state 2;} else if(handle-ticks LONG_TICKS) {handle-event (u8)LONG_PRESS_START;EVENT_CB(LONG_PRESS_START);handle-state 5;}break;case 2:if(handle-button_level handle-active_level) { //press down againhandle-event (u8)PRESS_DOWN;EVENT_CB(PRESS_DOWN);if(handle-repeat ! PRESS_REPEAT_MAX_NUM) {handle-repeat;}EVENT_CB(PRESS_REPEAT); // repeat hithandle-ticks 0;handle-state 3;} else if(handle-ticks SHORT_TICKS) { //released timeoutif(handle-repeat 1) {handle-event (u8)SINGLE_CLICK;EVENT_CB(SINGLE_CLICK);} else if(handle-repeat 2) {handle-event (u8)DOUBLE_CLICK;EVENT_CB(DOUBLE_CLICK); // repeat hit}handle-state 0;}break;case 3:if(handle-button_level ! handle-active_level) { //released press uphandle-event (u8)PRESS_UP;EVENT_CB(PRESS_UP);if(handle-ticks SHORT_TICKS) {handle-ticks 0;handle-state 2; //repeat press} else {handle-state 0;}} else if(handle-ticks SHORT_TICKS) { // SHORT_TICKS press down hold time LONG_TICKShandle-state 1;}break;case 5:if(handle-button_level handle-active_level) {//continue hold triggerhandle-event (u8)LONG_PRESS_HOLD;EVENT_CB(LONG_PRESS_HOLD);} else { //releasedhandle-event (u8)PRESS_UP;EVENT_CB(PRESS_UP);handle-state 0; //reset}break;default:handle-state 0; //resetbreak;}
}/*** brief Start the button work, add the handle into work list.* param handle: target handle struct.* retval 0: succeed. -1: already exist.*/
int button_start(struct Button* handle)
{struct Button* target head_handle;while(target) {if(target handle) return -1; //already exist.target target-next;}handle-next head_handle;head_handle handle;return 0;
}/*** brief Stop the button work, remove the handle off work list.* param handle: target handle struct.* retval None*/
void button_stop(struct Button* handle)
{struct Button** curr;for(curr head_handle; *curr; ) {struct Button* entry *curr;if(entry handle) {*curr entry-next;
// free(entry);return;//glacier add 2021-8-18} else {curr entry-next;}}
}/*** brief background ticks, timer repeat invoking interval 5ms.* param None.* retval None*/
void button_ticks(void)
{struct Button* target;for(targethead_handle; target; targettarget-next) {button_handler(target);}
}
头文件multi_button.h
/** Copyright (c) 2016 Zibin Zheng znbinqq.com* All rights reserved*/#ifndef _MULTI_BUTTON_H_
#define _MULTI_BUTTON_H_#include string.h
#include stm32f10x.h//According to your need to modify the constants.
#define TICKS_INTERVAL 5 //ms
#define DEBOUNCE_TICKS 3 //MAX 7 (0 ~ 7)
#define SHORT_TICKS (300 /TICKS_INTERVAL)
#define LONG_TICKS (1000 /TICKS_INTERVAL)typedef void (*BtnCallback)(void*);typedef enum {PRESS_DOWN 0,PRESS_UP,PRESS_REPEAT,SINGLE_CLICK,DOUBLE_CLICK,LONG_PRESS_START,LONG_PRESS_HOLD,number_of_event,NONE_PRESS
}PressEvent;typedef struct Button {u16 ticks;u8 repeat;u8 event;u8 state;u8 debounce_cnt;u8 active_level;u8 button_level;u8 button_id;u8 (*hal_button_Level)(u8 button_id_);BtnCallback cb[number_of_event];struct Button* next;
}Button;void button_init(struct Button* handle, u8(*pin_level)(u8), u8 active_level, u8 button_id);
void button_attach(struct Button* handle, PressEvent event, BtnCallback cb);
PressEvent get_button_event(struct Button* handle);
int button_start(struct Button* handle);
void button_stop(struct Button* handle);
void button_ticks(void);#endif 源文件KEY2.C
/********************************************************************************* file KEY2.c* author LQ* version* date 2024-4-29* brief multi_button******************************************************************************* attention********************************************************************************/#include stm32f10x.h
#include KEY.h
#include LED.h#ifdef USE_KEY2struct Button btn1;
struct Button btn2;// GPIO读取回调函数
u8 read_button_GPIO(u8 button_id)
{u8 read_v;switch (button_id){case KEY1_id:read_v GPIO_ReadInputDataBit(KEY1_GPIO_PORT, KEY1_GPIO_PIN);break;case KEY2_id:read_v GPIO_ReadInputDataBit(KEY2_GPIO_PORT, KEY2_GPIO_PIN);break;default:break;}return read_v;
}// 单击事件
void BTN1_SINGLE_CLICK_Handler(void *btn)
{switch (((Button *)btn)-button_id){case KEY1_id:LED_ON(LED1);break;case KEY2_id:LED_OFF(LED1);break;default:break;}
}
// 双击事件
void BTN1_DOUBLE_CLICK_Handler(void *btn)
{LED_Toggle(LED1);
}// 长按事件
void BTN1_LONG_PRESS_START_Handler(void *btn)
{LED_OFF(LED1);
}/*** brief KEY初始化* param None* retval None*/
void KEY_Init(void)
{/* GPIO_KEY Clock */RCC_APB2PeriphClockCmd(KEY1_GPIO_CLK, ENABLE);RCC_APB2PeriphClockCmd(KEY2_GPIO_CLK, ENABLE);/* GPIO_KEY Pin */GPIO_InitTypeDef GPIO_InitStructure;GPIO_InitStructure.GPIO_Mode GPIO_Mode_IPU;GPIO_InitStructure.GPIO_Speed GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Pin KEY1_GPIO_PIN;GPIO_Init(KEY1_GPIO_PORT, GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin KEY2_GPIO_PIN;GPIO_Init(KEY2_GPIO_PORT, GPIO_InitStructure);/*button1 init*/button_init(btn1, read_button_GPIO, 0, KEY1_id); // 初始化按键结构体button_attach(btn1, SINGLE_CLICK, BTN1_SINGLE_CLICK_Handler); // 添加单击事件button_attach(btn1, DOUBLE_CLICK, BTN1_DOUBLE_CLICK_Handler); // 添加双击事件button_attach(btn1, LONG_PRESS_START, BTN1_LONG_PRESS_START_Handler); // 添加长按事件button_start(btn1); // 启动按键 ///*button2 init*/button_init(btn2, read_button_GPIO, 0, KEY2_id);button_attach(btn2, SINGLE_CLICK, BTN1_SINGLE_CLICK_Handler);button_attach(btn2, DOUBLE_CLICK, BTN1_DOUBLE_CLICK_Handler);button_start(btn2);
}#endif
头文件KEY.h
/********************************************************************************* file KEY.h* author LQ* version V1.0* date 2023-4-29* brief multi_button******************************************************************************* attention********************************************************************************/#ifndef _KEY_H
#define _KEY_H#define USE_KEY2 // 定义使用KEY2.c注释则使用KEY1.c#ifndef USE_KEY2 // 如果USE_KEY2没有被定义就定义名为USE_KEY1的宏
#define USE_KEY1
#endif#include multi_button.h/*GPIO宏定义*/
#define KEY1_GPIO_PORT GPIOA
#define KEY1_GPIO_PIN GPIO_Pin_8
#define KEY1_GPIO_CLK RCC_APB2Periph_GPIOA#ifdef USE_KEY2 // 如果USE_KEY2被定定义
#define KEY2_GPIO_PORT GPIOA
#define KEY2_GPIO_PIN GPIO_Pin_9
#define KEY2_GPIO_CLK RCC_APB2Periph_GPIOAenum Button_IDs
{KEY1_id,KEY2_id,
};
#endifvoid KEY_Init(void);#endif 源文件KEY1.C
/********************************************************************************* file KEY1.c* author LQ* version* date 2024-4-29* brief multi_button******************************************************************************* attention********************************************************************************/#include stm32f10x.h
#include KEY.h
#include LED.h#ifdef USE_KEY1struct Button btn1;// GPIO读取回调函数
u8 read_button_GPIO(u8 button_id)
{u8 led_sta;led_sta GPIO_ReadInputDataBit(KEY1_GPIO_PORT, KEY1_GPIO_PIN);return led_sta;
}// 单击事件
void BTN1_SINGLE_CLICK_Handler(void *btn)
{LED_ON(LED1);
}// 双击事件
void BTN1_DOUBLE_CLICK_Handler(void *btn)
{LED_Toggle(LED1);
}// 长按事件
void BTN1_LONG_PRESS_START_Handler(void *btn)
{LED_OFF(LED1);
}/*** brief KEY初始化* param None* retval None*/
void KEY_Init(void)
{/* GPIO_KEY Clock */RCC_APB2PeriphClockCmd(KEY1_GPIO_CLK, ENABLE);/* GPIO_KEY pin */GPIO_InitTypeDef GPIO_InitStructure;GPIO_InitStructure.GPIO_Pin KEY1_GPIO_PIN;GPIO_InitStructure.GPIO_Mode GPIO_Mode_IPU;GPIO_InitStructure.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(KEY1_GPIO_PORT, GPIO_InitStructure);/*button init*/button_init(btn1, read_button_GPIO, 0, 0); // 初始化按键结构体button_attach(btn1, SINGLE_CLICK, BTN1_SINGLE_CLICK_Handler); // 添加单击事件button_attach(btn1, DOUBLE_CLICK, BTN1_DOUBLE_CLICK_Handler); // 添加双击事件button_attach(btn1, LONG_PRESS_START, BTN1_LONG_PRESS_START_Handler); // 添加长按事件button_start(btn1); // 启动按键
}#endif 参考资料
[1] 【B落子叶初LQ】MultiButton_小型按键驱动模块[2] 【GitHub】https://github.com/0x1abin/MultiButton/tree/master
