标签： esp8266 key
KEY 相关API
有关按键的程序在SDK根目录下的driver_lib文件夹中的key.c和key.h。
相关结构体
/** 按键处理函数 数据类型 */
typedef void (* key_function)(void);
struct single_key_param
{
/*按键处理流程标号*/
uint8 key_level;
/*GPIO引脚号（0-15）*/
uint8 gpio_id;
/*GPIO 功能(详见ESP8266 管脚清单.xlsx)*/
uint8 gpio_func;
/*GPIO MUX寄存器（参见gpio.h）*/
uint32 gpio_name;
/*定时器相关数据结构(详见SDK开发文档)*/
os_timer_t key_5s;
/*定时器相关数据结构(详见SDK开发文档)*/
os_timer_t key_50ms;
/*按键短按处理程序*/
key_function short_press;
/*按键长按处理程序*/
key_function long_press;
};
struct keys_param
{
/*按键的数量*/
uint8 key_num;
/*按键的相关信息*/
struct single_key_param **single_key;
};
API
struct single_key_param *key_init_single(uint8 gpio_id, uint32 gpio_name, uint8 gpio_func, key_function long_press, key_function short_press);
说明:返回一个由程序分配的存储着按键数据的指针
按键检查流程图：
按键检查流程图
源码剖析
- 按键初始化函数
void ICACHE_FLASH_ATTR key_init(struct keys_param *keys)
{
uint8 i;
/* 配置GPIO中断的中断服务函数 */
ETS_GPIO_INTR_ATTACH(key_intr_handler, keys);
/* 关闭GPIO中断 */
ETS_GPIO_INTR_DISABLE();
for (i = 0; i < keys->key_num; i++)
{
keys->single_key[i]->key_level = 1;
/* 配置引脚模式为GPIO模式 */
PIN_FUNC_SELECT(keys->single_key[i]->gpio_name, keys->single_key[i]->gpio_func);
/*配置GPIO模式为输入模式 */
gpio_output_set(0, 0, 0, GPIO_ID_PIN(keys->single_key[i]->gpio_id));
/* 初始化GPIO中断配置 */
gpio_register_set(GPIO_PIN_ADDR(keys->single_key[i]->gpio_id), GPIO_PIN_INT_TYPE_SET(GPIO_PIN_INTR_DISABLE)
| GPIO_PIN_PAD_DRIVER_SET(GPIO_PAD_DRIVER_DISABLE)
| GPIO_PIN_SOURCE_SET(GPIO_AS_PIN_SOURCE));
/* 清除GPIO中断标志 */
GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, BIT(keys->single_key[i]->gpio_id));
/* 配置GPIO中断触发类型为下降沿触发 */
gpio_pin_intr_state_set(GPIO_ID_PIN(keys->single_key[i]->gpio_id), GPIO_PIN_INTR_NEGEDGE);
}
/* 开启GPIO中断 */
ETS_GPIO_INTR_ENABLE();
}
- 按键长按检测函数
static void ICACHE_FLASH_ATTR key_5s_cb(struct single_key_param *single_key)
{
/* 关闭按键长按检测定时器 */
os_timer_disarm(&single_key->key_5s);
/* 按键处于按下状态 */
if (0 == GPIO_INPUT_GET(GPIO_ID_PIN(single_key->gpio_id)))
{
/* 执行按键长按处理函数 */
if (single_key->long_press)
{
single_key->long_press();
}
}
}
- 按键短按检测函数
static void ICACHE_FLASH_ATTR key_50ms_cb(struct single_key_param *single_key)
{
/* 关闭按键短按检测定时器 */
os_timer_disarm(&single_key->key_50ms);
/* 按键处于松开状态 */
if (1 == GPIO_INPUT_GET(GPIO_ID_PIN(single_key->gpio_id)))
{
/* 停止按键长按状态检测 */
os_timer_disarm(&single_key->key_5s);
single_key->key_level = 1;
/* 设置该按键中断触发方式为下降沿触发(等待按键再次按下) */
gpio_pin_intr_state_set(GPIO_ID_PIN(single_key->gpio_id), GPIO_PIN_INTR_NEGEDGE);
/* 运行按键短按处理程序 */
if (single_key->short_press)
{
single_key->short_press();
}
}
else
{
/* 设置该按键中断触发方式为上升沿触发(等待按键松开) */
gpio_pin_intr_state_set(GPIO_ID_PIN(single_key->gpio_id), GPIO_PIN_INTR_POSEDGE);
}
}
- GPIO中断处理函数
static void key_intr_handler(struct keys_param *keys)
{
uint8 i;
//读取GPIO状态寄存器，获取中断信息
uint32 gpio_status = GPIO_REG_READ(GPIO_STATUS_ADDRESS);
for (i = 0; i < keys->key_num; i++)
{
if (gpio_status & BIT(keys->single_key[i]->gpio_id))
{
/** 关闭该按键的中断 */
gpio_pin_intr_state_set(GPIO_ID_PIN(keys->single_key[i]->gpio_id), GPIO_PIN_INTR_DISABLE);
/** 清除该按键的中断标志 */
GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, gpio_status & BIT(keys->single_key[i]->gpio_id));
/** 按键处理流程一 */
if (keys->single_key[i]->key_level == 1)
{
/** 启动按键长按检测定时器 */
os_timer_disarm(&keys->single_key[i]->key_5s);
os_timer_setfn(&keys->single_key[i]->key_5s, (os_timer_func_t *)key_5s_cb, keys->single_key[i]);
os_timer_arm(&keys->single_key[i]->key_5s, 5000, 0);
keys->single_key[i]->key_level = 0;
/** 设置该按键中断触发方式为上升沿触发(等待按键松开) */
gpio_pin_intr_state_set(GPIO_ID_PIN(keys->single_key[i]->gpio_id), GPIO_PIN_INTR_POSEDGE);
}
/** 按键处理流程二 */
else
{
/** 启动按键短按检测定时器 */
os_timer_disarm(&keys->single_key[i]->key_50ms);
os_timer_setfn(&keys->single_key[i]->key_50ms, (os_timer_func_t *)key_50ms_cb, keys->single_key[i]);
os_timer_arm(&keys->single_key[i]->key_50ms, 50, 0);
}
}
}
}
KEY Demo
#include "ets_sys.h"
#include "osapi.h"
#include "os_type.h"
#include "user_interface.h"
#include "eagle_soc.h"
#include "gpio.h"
#include "key.h"
/*********************************************************************************
* @brief 开关输入引脚配置
********************************************************************************/
#define SWITCH_Pin_NUM 5
#define SWITCH_Pin_FUNC FUNC_GPIO5
#define SWITCH_Pin_MUX PERIPHS_IO_MUX_GPIO5_U
#define SWITCH_Pin_Rd_Init() GPIO_DIS_OUTPUT(SWITCH_Pin_NUM)
#define SWITCH_Pin_Wr_Init() GPIO_OUTPUT_SET(SWITCH_Pin_NUM,0)
#define SWITCH_Pin_Set_High() GPIO_OUTPUT_SET(SWITCH_Pin_NUM,1)
#define SWITCH_Pin_Set_Low() GPIO_OUTPUT_SET(SWITCH_Pin_NUM,0)
#define SWITCH_Pin_State ( GPIO_INPUT_GET(SWITCH_Pin_NUM) != 0 )
/*********************************************************************************
* @brief 按键相关变量
********************************************************************************/
static struct keys_param switch_param;
static struct single_key_param *switch_signle;
static bool status = true;
/*********************************************************************************
* @brief 开关短按状态处理函数
* @param [in/out] void
* @return void
* @note None
********************************************************************************/
static void Switch_ShortPress_Handler( void )
{
if( status == true )
{
status = false;
}
else
{
status = true;
}
}
/********************************************************************************
* @brief 输入初始化函数
* @param [in/out] void
* @return void
* @note None
********************************************************************************/
void drv_Switch_Init( void )
{
switch_signle = key_init_single( SWITCH_Pin_NUM, SWITCH_Pin_MUX,
SWITCH_Pin_FUNC,
NULL,
&Switch_ShortPress_Handler );
switch_param.key_num = 1;
switch_param.single_key = &switch_signle;
key_init( &switch_param );
}
http://blog.csdn.net/qq_15647227/article/details/52403998
http://www.cnblogs.com/mmmmar/p/6545202.html
http://blog.csdn.net/qq_15647227/article/details/52218376
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