簡介

MultiButton 是一個小巧簡單易用的事件驅動型按鍵驅動模塊，可無限量擴展按鍵，按鍵事件的回調異步處理方式可以簡化你的程序結構，去除冗余的按鍵處理硬編碼，讓你的按鍵業務邏輯更清晰。

開源地址：

https://github.com/0x1abin/MultiButton

1.特性

MultiButton 使用C語言實現，基于面向對象方式設計思路，每個按鍵對象單獨用一份數據結構管理：

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  (*hal_button_Level)(void);  BtnCallback  cb[number_of_event];  struct Button* next;};

這樣每個按鍵使用單向鏈表相連，依次進入 button_handler(struct Button* handle) 狀態機處理，所以每個按鍵的狀態彼此獨立。

2.按鍵事件

使用方法

struct Button button1;

button_init(&button1, read_button_pin, 0);

button_attach(&button1, SINGLE_CLICK, Callback_SINGLE_CLICK_Handler);button_attach(&button1, DOUBLE_CLICK, Callback_DOUBLE_Click_Handler);...

button_start(&button1);

while(1) {    ...    if(timer_ticks == 5) {        timer_ticks = 0;
        button_ticks();    }}

實例

#include "button.h"
struct Button btn1;
uint8_t read_button1_GPIO(){  return HAL_GPIO_ReadPin(B1_GPIO_Port, B1_Pin);}void BTN1_PRESS_DOWN_Handler(void* btn){  //do something...}
void BTN1_PRESS_UP_Handler(void* btn){  //do something...}
int main(){   button_init(&btn1, read_button1_GPIO, 0);   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(&btn2, 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)  {  }}