一、應用簡介
用戶可以通過ESP32提供的API來使用GPIO，本文介紹ESP32中的GPIO輸出以及中斷，
二、GPIO輸出
/*******************************************
* INCLUDES
*/
#include "driver/gpio.h"
#include "esp_log.h"
/*******************************************
* LOCAL VARIABLES
*/
static const char *s_relayTag = "root_relay_service"; // 列印標識
/*******************************************
* DEFINITIONS
*/
// 一個設備由2個繼電器控制,這里將繼電器分組,每組2個繼電器
#define GROUP0_RELAY1_IO 18
#define GROUP0_RELAY1_PIN_SEL (1<<GROUP0_RELAY1_IO)//配置gpioout位暫存器
#define GROUP0_RELAY2_IO 19
#define GROUP0_RELAY2_PIN_SEL (1<<GROUP0_RELAY2_IO)//配置gpioout位暫存器
#define GROUP1_RELAY1_IO 4
#define GROUP1_RELAY1_PIN_SEL (1<<GROUP1_RELAY1_IO)//配置gpioout位暫存器
#define GROUP1_RELAY2_IO 27
#define GROUP1_RELAY2_PIN_SEL (1<<GROUP1_RELAY2_IO)//配置gpioout位暫存器
/*******************************************
* PUBLIC FUNCTIONS
*/
/**
@brief 繼電器初始化
@param 無
@return 無
*/
void RelayGpioInit(void)
{
gpio_config_t io_conf;
// 定義一個gpio_config型別的結構體，下面的都算對其進行的配置
// disable interrupt
io_conf.intr_type = GPIO_PIN_INTR_DISABLE;
// set as output mode
io_conf.mode = GPIO_MODE_OUTPUT;
//bit mask of the pins that you want to set,e.g.GPIO18/19
io_conf.pin_bit_mask = GROUP0_RELAY1_PIN_SEL;
// disable pull-down mode
io_conf.pull_down_en = 0;
// disable pull-up mode
io_conf.pull_up_en = 0;
// configure GPIO with the given settings
gpio_config(&io_conf);
// 默認輸出高，繼電器關
gpio_set_level(GROUP0_RELAY1_IO, 0);
gpio_config_t io_conf1;
// 定義一個gpio_config型別的結構體，下面的都算對其進行的配置
// disable interrupt
io_conf1.intr_type = GPIO_PIN_INTR_DISABLE;
// set as output mode
io_conf1.mode = GPIO_MODE_OUTPUT;
//bit mask of the pins that you want to set,e.g.GPIO18/19
io_conf1.pin_bit_mask = GROUP0_RELAY2_PIN_SEL;
// disable pull-down mode
io_conf1.pull_down_en = 0;
// disable pull-up mode
io_conf1.pull_up_en = 0;
// configure GPIO with the given settings
gpio_config(&io_conf1);
// 默認輸出高，繼電器關
gpio_set_level(GROUP0_RELAY2_IO, 0);
gpio_config_t io_conf2;
// 定義一個gpio_config型別的結構體，下面的都算對其進行的配置
// disable interrupt
io_conf2.intr_type = GPIO_PIN_INTR_DISABLE;
// set as output mode
io_conf2.mode = GPIO_MODE_OUTPUT;
//bit mask of the pins that you want to set,e.g.GPIO18/19
io_conf2.pin_bit_mask = GROUP1_RELAY1_PIN_SEL;
// disable pull-down mode
io_conf2.pull_down_en = 0;
// disable pull-up mode
io_conf2.pull_up_en = 0;
// configure GPIO with the given settings
gpio_config(&io_conf2);
// 默認輸出高，繼電器關
gpio_set_level(GROUP1_RELAY1_IO, 0);
gpio_config_t io_conf3;
// 定義一個gpio_config型別的結構體，下面的都算對其進行的配置
// disable interrupt
io_conf3.intr_type = GPIO_PIN_INTR_DISABLE;
// set as output mode
io_conf3.mode = GPIO_MODE_OUTPUT;
//bit mask of the pins that you want to set,e.g.GPIO18/19
io_conf3.pin_bit_mask = GROUP1_RELAY2_PIN_SEL;
// disable pull-down mode
io_conf3.pull_down_en = 0;
// disable pull-up mode
io_conf3.pull_up_en = 0;
// configure GPIO with the given settings
gpio_config(&io_conf3);
// 默認輸出高，繼電器關
gpio_set_level(GROUP1_RELAY2_IO, 0);
}
/**
@brief 繼電器狀態設定
@param relayStatus -[in] 狀態值(每一位代表一個繼電器,低四位有效)
@return 無
*/
void SetRelayStatus(uint8_t relayStatus)
{
if((relayStatus & 0x01) == 0)
{
gpio_set_level(GROUP0_RELAY1_IO, 0);
}
else
{
gpio_set_level(GROUP0_RELAY1_IO, 1);
}
ESP_LOGI(s_relayTag, "GROUP0_RELAY1_IO:%x", (relayStatus & 0x01));
if((relayStatus & 0x02) == 0)
{
gpio_set_level(GROUP0_RELAY2_IO, 0);
}
else
{
gpio_set_level(GROUP0_RELAY2_IO, 1);
}
ESP_LOGI(s_relayTag, "GROUP0_RELAY2_IO:%x", (relayStatus & 0x02));
if((relayStatus & 0x04) == 0)
{
gpio_set_level(GROUP1_RELAY1_IO, 0);
}
else
{
gpio_set_level(GROUP1_RELAY1_IO, 1);
}
ESP_LOGI(s_relayTag, "GROUP1_RELAY1_IO:%x", (relayStatus & 0x04));
if((relayStatus & 0x08) == 0)
{
gpio_set_level(GROUP1_RELAY2_IO, 0);
}
else
{
gpio_set_level(GROUP1_RELAY2_IO, 1);
}
ESP_LOGI(s_relayTag, "GROUP1_RELAY2_IO:%x", (relayStatus & 0x08));
}
三、GPIO輸入
/*********************************************************************
* INCLUDES
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "driver/gpio.h"
#include "esp_log.h"
/*********************************************************************
* DEFINITIONS
*/
#define ESP_INTR_FLAG_DEFAULT 0
#define ROOT_KEY1_IO 34
#define ROOT_KEY2_IO 35
#define ROOT_KEY3_IO 5
#define ROOT_KEY4_IO 21
#define ROOT_KEY5_IO 25
#define ROOT_KEY6_IO 26
static void IRAM_ATTR keyIsrHandler(void* arg);
static void eliminateDitheringTimerCB(void *arg);
static void queueTask(void* arg);
/*********************************************************************
* LOCAL VARIABLES
*/
static const char *s_keyTag = "key_service";
// 定義一個佇列回傳變數
static xQueueHandle s_gpioEvtQueue = NULL;
static uint32_t s_gpioNum = 0;
// 消抖定時器配置
static esp_timer_handle_t s_eliminateDitheringHandle = 0;
static esp_timer_create_args_t s_eliminateDitheringArg =
{
.callback = &eliminateDitheringTimerCB, // 設定回呼函式
.arg = NULL, // 不攜帶引數
.name = "EliminateDitheringTimer" // 定時器名字
};
/*********************************************************************
* PUBLIC FUNCTIONS
*/
/**
@brief 按鍵中斷初始化
@param 無
@return 無
*/
void KeyInit(void)
{
gpio_config_t io_conf;
//interrupt of rising edge
io_conf.intr_type = GPIO_INTR_NEGEDGE;
//bit mask of the pins, use GPIO4/5 here
io_conf.pin_bit_mask = ( (1ULL<<ROOT_KEY1_IO) | (1ULL<<ROOT_KEY2_IO) | (1ULL<<ROOT_KEY3_IO) | (1ULL<<ROOT_KEY4_IO) | (1ULL<<ROOT_KEY5_IO) | (1ULL<<ROOT_KEY6_IO));
//set as input mode
io_conf.mode = GPIO_MODE_INPUT;
//enable pull-down mode
io_conf.pull_down_en = 0;
io_conf.pull_up_en = 1;
gpio_config(&io_conf);
//change gpio intrrupt type for one pin
gpio_set_intr_type(ROOT_KEY1_IO, GPIO_INTR_NEGEDGE);
gpio_set_intr_type(ROOT_KEY2_IO, GPIO_INTR_NEGEDGE);
gpio_set_intr_type(ROOT_KEY3_IO, GPIO_INTR_NEGEDGE);
gpio_set_intr_type(ROOT_KEY4_IO, GPIO_INTR_NEGEDGE);
gpio_set_intr_type(ROOT_KEY5_IO, GPIO_INTR_NEGEDGE);
gpio_set_intr_type(ROOT_KEY6_IO, GPIO_INTR_NEGEDGE);
//create a queue to handle gpio event from isr
s_gpioEvtQueue = xQueueCreate(20, sizeof(uint32_t));
//start gpio task
xTaskCreate(queueTask, "queueTask", 4096, NULL, 3, NULL);
//install gpio isr service
gpio_install_isr_service(ESP_INTR_FLAG_DEFAULT);
//hook isr handler for specific gpio pin
gpio_isr_handler_add(ROOT_KEY1_IO, keyIsrHandler, (void*) ROOT_KEY1_IO);
gpio_isr_handler_add(ROOT_KEY2_IO, keyIsrHandler, (void*) ROOT_KEY2_IO);
gpio_isr_handler_add(ROOT_KEY3_IO, keyIsrHandler, (void*) ROOT_KEY3_IO);
gpio_isr_handler_add(ROOT_KEY4_IO, keyIsrHandler, (void*) ROOT_KEY4_IO);
gpio_isr_handler_add(ROOT_KEY5_IO, keyIsrHandler, (void*) ROOT_KEY5_IO);
gpio_isr_handler_add(ROOT_KEY6_IO, keyIsrHandler, (void*) ROOT_KEY6_IO);
// 創建消抖定時器
esp_timer_create(&s_eliminateDitheringArg, &s_eliminateDitheringHandle);
}
/*********************************************************************
* LOCAL FUNCTIONS
*/
/**
@brief 按鍵中斷服務
@param arg -[in] 任意引數
@return 無
*/
static void IRAM_ATTR keyIsrHandler(void* arg)
{
s_gpioNum = (uint32_t) arg;
// 開消抖,單位:us
esp_timer_start_once(s_eliminateDitheringHandle, 40 * 1000);
}
/**
@brief 消抖回呼
@param arg -[in] 任意引數
@return 無
*/
static void eliminateDitheringTimerCB(void *arg)
{
if(gpio_get_level(s_gpioNum) == 0)
{
//把中斷訊息插入到佇列的后面，將gpio的io引數傳遞到佇列中
xQueueSendFromISR(s_gpioEvtQueue, &s_gpioNum, NULL);
}
}
/**
@brief 任務函式
@param arg -[in] 任意引數
@return 無
*/
static void queueTask(void* arg)
{
uint32_t io_num;
for(;;)
{
if(xQueueReceive(s_gpioEvtQueue, &io_num, portMAX_DELAY))
{
// 一個設備占用2個繼電器(例如:KEY1~KEY3對應第0組的那個設備,此設備由繼電器1、2控制)
if(io_num == ROOT_KEY1_IO)
{
ESP_LOGI(s_keyTag,"GPIO[%d] intr, key[%d], val: %d\n", io_num, 1, gpio_get_level(io_num));
}
if(io_num == ROOT_KEY2_IO)
{
ESP_LOGI(s_keyTag,"GPIO[%d] intr, key[%d], val: %d\n", io_num, 2, gpio_get_level(io_num));
}
if(io_num == ROOT_KEY3_IO)
{
ESP_LOGI(s_keyTag,"GPIO[%d] intr, key[%d], val: %d\n", io_num, 3, gpio_get_level(io_num));
}
if(io_num == ROOT_KEY4_IO)
{
ESP_LOGI(s_keyTag,"GPIO[%d] intr, key[%d], val: %d\n", io_num, 4, gpio_get_level(io_num));
}
if(io_num == ROOT_KEY5_IO)
{
ESP_LOGI(s_keyTag,"GPIO[%d] intr, key[%d], val: %d\n", io_num, 5, gpio_get_level(io_num));
}
if(io_num == ROOT_KEY6_IO)
{
ESP_LOGI(s_keyTag,"GPIO[%d] intr, key[%d], val: %d\n", io_num, 6, gpio_get_level(io_num));
}
}
}
}
? 由 青梅煮久 寫于 2021 年 01 月 08 日
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標籤：其他