【STM32F411Nucleo测评】移植多功能按键驱动库

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【STM32F411Nucleo测评】移植多功能按键驱动库 [复制链接]

> 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 > 本文将介绍该按键库在STM32F411上面移植的过程 ## 硬件连接 原理图中的两个按键管脚对应如下表所示 | 按键 | 管脚| | ---- | --- | | KEY0 | B3| | KEY1 | A10 | <ignore_js_op> <img src="data/attachment/forum/202403/04/215946phxyeyml3xzld5ii.png" alt="ioboard.png" title="ioboard.png" /> </ignore_js_op> ## 初始化配置 然后在 CubeMX 中初始化这两个管脚和一个定时器，定时器用于检测按键的任务提供时钟，设置为 5ms 一次 tick <ignore_js_op> <img src="data/attachment/forum/202403/04/215955ia98e9vsjslv1aty.png" alt="Pasted image 20240229230817.png" title="Pasted image 20240229230817.png" /> </ignore_js_op> ## 移植按键库 初始化按键对象和回调函数，当按键按下时会printf打印信息 ```c void btn1_cb(struct Button* btn) { switch (btn->event) { case SINGLE_CLICK: printf("btn 1 single click\r\n"); break; case DOUBLE_CLICK: printf("btn 1 double click\r\n"); break; default: break; } } void btn2_cb(struct Button* btn) { switch (btn->event) { case SINGLE_CLICK: printf("btn 2 single click\r\n"); break; case DOUBLE_CLICK: printf("btn 2 double click\r\n"); break; case LONG_PRESS_HOLD: break; default: break; } } uint8_t read_btn(uint8_t button_id) { uint8_t ret; // you can share the GPIO read function with multiple Buttons switch (button_id) { case 0: ret = HAL_GPIO_ReadPin(KEY0_GPIO_Port, KEY0_Pin); return ret; break; case 1: ret = HAL_GPIO_ReadPin(KEY1_GPIO_Port, KEY1_Pin); return ret; break; default: return 0; break; } } struct Button btn1; struct Button btn2; void button_setup(void) { /* init */ button_init(&btn1, read_btn, 0, 1); button_init(&btn2, read_btn, 0, 0); /* attach */ button_attach(&btn1, SINGLE_CLICK, (BtnCallback) btn1_cb); button_attach(&btn1, DOUBLE_CLICK, (BtnCallback) btn1_cb); button_attach(&btn2, SINGLE_CLICK, (BtnCallback) btn2_cb); button_attach(&btn2, DOUBLE_CLICK, (BtnCallback) btn2_cb); button_attach(&btn2, LONG_PRESS_HOLD, (BtnCallback) btn2_cb); /* start */ button_start(&btn1); button_start(&btn2); } ``` 添加printf的支持 ```c int fputc(int ch, FILE *f) { HAL_UART_Transmit(&huart2,(uint8_t *)&ch,1,0xFFFF); return ch; } ``` 在中断函数内添加按键任务的时钟 ```c void TIM1_BRK_TIM9_IRQHandler(void) { /* USER CODE BEGIN TIM1_BRK_TIM9_IRQn 0 */ /* USER CODE END TIM1_BRK_TIM9_IRQn 0 */ HAL_TIM_IRQHandler(&htim9); /* USER CODE BEGIN TIM1_BRK_TIM9_IRQn 1 */ button_ticks(); /* USER CODE END TIM1_BRK_TIM9_IRQn 1 */ } ``` multi_button.h 中修改tick为5ms ```c #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) ``` ## 验证 编译烧录到开发板，当按键按下会打印信息，后面也可以将这个单击、双击添加上别的事件。 <ignore_js_op> <img src="data/attachment/forum/202403/04/220009zchl1ebw1lcewb51.png" alt="Pasted image 20240229225439.png" title="Pasted image 20240229225439.png" /> </ignore_js_op>