ESP32 温湿度和气体传感器驱动
驱动原理iic
iic.h文件
#ifndef __APP_IIC_H__
#define __APP_IIC_H__
#include "esp_types.h"
#include "driver/uart.h"
#include "driver/gpio.h"
esp_err_t i2c_master_init(void);
uint8_t AHT20_Read_Status(void);
uint8_t AHT20_Read_Cal_Enable(void);
void AC_CMD(void);
uint8_t Calc_CRC8(uint8_t *message,uint8_t Num);
void AHT20_Read_CTdata(uint32_t *ct);
void AHT20_Read_CTdata_crc(uint16_t *ct);
void AHT20_Init(void);
void JH_Reset_REG(uint8_t addr);
void AHT20_Start_Init(void);
//#define SENSOR_PORT_TYPE unsigned char
typedef struct
{
// SENSOR_PORT_TYPE *pPORT;
// unsigned int Speed;
unsigned char Adrr; //通讯设备地址
unsigned char Status; //AGS02MA模块状态字节
unsigned short int timcnt; //时间计数器
unsigned char ErrFlag; //通讯错误次数
unsigned short int SetRTim; //设置读取间隔时间
unsigned char RegAddr; //寄存器地址
unsigned char ReadByte[10]; //存放读取的数据
unsigned int RSVal; //传感器阻值
unsigned int PPBVal; //TVOC ppb数值
unsigned char year; //年
unsigned char month;//月
unsigned char day; //日
unsigned char SoftVer; //版本号
}MYI2C_Struct;
extern MYI2C_Struct SENx;
void MYI2C_Init(MYI2C_Struct *pSENSOR,unsigned int ReadTim,unsigned char xAddr);
void MYI2C_Handle(MYI2C_Struct *pSENSOR);
#endif
dht20温湿度传感器
#include "app_iic.h"
#include "app_fan_light.h"
#include
#include "string.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_log.h"
#include "sdkconfig.h"
#include "driver/i2c.h"
#include "driver/uart.h"
#include "driver/gpio.h"
#include "app_param.h"
#include
#include
#include "app_wifi.h"
#include
#include
#include "esp_log.h"
#include "esp_wifi.h"
#include "nvs_flash.h"
#include "esp_flash.h"
#include "app_public.h"
#include "app_miio.h"
#include "app_sntp.h"
#include "app_time_task.h"
#include "app_miio.h"
#include "app_client.h"
#include "app_pwm_light.h"
#include
#include "app_function.h"
#include "app_mqtt.h"
#include "app_raw.h"
#include "blu_gattc.h"
#include "app_com.h"
static const char *TAG = "app_iic";
#define _I2C_NUMBER(num) I2C_NUM_##num
#define I2C_NUMBER(num) _I2C_NUMBER(num)
#define I2C_MASTER_SCL_IO 6 /*!< gpio number for I2C master clock */
#define I2C_MASTER_SDA_IO 7 /*!< gpio number for I2C master data */
#define I2C_MASTER_NUM I2C_NUM_0 /*!< I2C port number for master dev */
#define I2C_MASTER_FREQ_HZ 20000 /*!< I2C master clock frequency */
#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
#define WRITE_BIT I2C_MASTER_WRITE /*!< I2C master write */
#define READ_BIT I2C_MASTER_READ /*!< I2C master read */
#define ACK_CHECK_EN ACK_VAL /*!< I2C master will check ack from slave*/
#define ACK_CHECK_DIS NACK_VAL /*!< I2C master will not check ack from slave */
#define ACK_VAL 0x0 /*!< I2C ack value */
#define NACK_VAL 0x1 /*!< I2C nack value */
/**
* @brief IIC初始化
*
* @return esp_err_t
*/
esp_err_t i2c_master_init(void)
{
int i2c_master_port = I2C_MASTER_NUM;
i2c_config_t conf = {
.mode = I2C_MODE_MASTER,
.sda_io_num = I2C_MASTER_SDA_IO,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_io_num = I2C_MASTER_SCL_IO,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = I2C_MASTER_FREQ_HZ,
// .clk_flags = 0, /*!< Optional, you can use I2C_SCLK_SRC_FLAG_* flags to choose i2c source clock here. */
};
esp_err_t err = i2c_param_config(i2c_master_port, &conf);
if (err != ESP_OK) {
return err;
}
return i2c_driver_install(i2c_master_port, conf.mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
}
uint8_t AHT20_Read_Status(void)//读取AHT20的状态寄存器
{
uint8_t Byte_first[1]={0};
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
vTaskDelay(2 / 1000);
i2c_master_write_byte(cmd, 0x71, ACK_CHECK_EN);
vTaskDelay(2 / 1000);
i2c_master_read_byte(cmd,&Byte_first[0],ACK_CHECK_DIS);
vTaskDelay(2 / 1000);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
ESP_LOGE(TAG, "AHT20_Read_Status:%d ",Byte_first[0]);
return Byte_first[0];
}
uint8_t AHT20_Read_Cal_Enable(void) //查询cal enable位有没有使能
{
uint8_t val = 0;//ret = 0,
val = AHT20_Read_Status();
ESP_LOGW(TAG, "AHT20_Read_Cal_Enable():%d",val);
if((val & 0x68)==0x08)
return 1;
else
return 0;
}
void abc(void)
{
int i=0;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, 0x70, ACK_CHECK_EN);
vTaskDelay(2 / 1000);
i2c_master_write_byte(cmd, 0xAC, ACK_CHECK_EN);
vTaskDelay(2 / 1000);
i2c_master_write_byte(cmd, 0x33, ACK_CHECK_EN);
vTaskDelay(2 / 1000);
i2c_master_write_byte(cmd, 0x00, ACK_CHECK_EN);
vTaskDelay(2 / 1000);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
}
//CRC校验类型：CRC8/MAXIM
//多项式：X8+X5+X4+1
//Poly：0011 0001 0x31
//高位放到后面就变成 1000 1100 0x8c
//C现实代码：
uint8_t Calc_CRC8(uint8_t *message,uint8_t Num)
{
uint8_t i;
uint8_t byte;
uint8_t crc=0xFF;
for(byte=0; byte { crc^=(message[byte]); for(i=8;i>0;--i) { if(crc&0x80) crc=(crc<<1)^0x31; else crc=(crc<<1); } } return crc; } void AHT20_Read_CTdata(uint32_t *ct) //没有CRC校验，直接读取AHT20的温度和湿度数据 { uint8_t Byte_1th[1]={0}; uint8_t Byte_2th[1]={0}; uint8_t Byte_3th[1]={0}; uint8_t Byte_4th[1]={0}; uint8_t Byte_5th[1]={0}; uint8_t Byte_6th[1]={0}; uint32_t RetuData = 0 ,c1=0,c2=0; uint8_t CTDATA[7]={0};//用于CRC传递数组 uint16_t cnt = 0; abc();//向AHT10发送AC命令 vTaskDelay(80 / portTICK_RATE_MS);//延时80ms左右 cnt = 0; while(((AHT20_Read_Status()&0x80)==0x80))//直到状态bit[7]为0，表示为空闲状态，若为1，表示忙状态 { vTaskDelay(2 / portTICK_RATE_MS); if(cnt++>=100) { break; } } i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x71, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_1th[0],ACK_CHECK_EN);//状态字，查询到状态为0x98,表示为忙状态，bit[7]为1；状态为0x1C，或者0x0C，或者0x08表示为空闲状态，bit[7]为0 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_2th[0],ACK_CHECK_EN);//湿度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_3th[0],ACK_CHECK_EN);//湿度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_4th[0],ACK_CHECK_EN);//湿度/温度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_5th[0],ACK_CHECK_EN);//温度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_6th[0],ACK_CHECK_DIS);//温度 vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); RetuData = (RetuData|Byte_2th[0])<<8; RetuData = (RetuData|Byte_3th[0])<<8; RetuData = (RetuData|Byte_4th[0]); RetuData =RetuData >>4; c1 = RetuData;//湿度 RetuData = 0; RetuData = (RetuData|Byte_4th[0])<<8; RetuData = (RetuData|Byte_5th[0])<<8; RetuData = (RetuData|Byte_6th[0]); RetuData = RetuData&0xfffff; c2 =RetuData; //温度 printf("%d-----%d\r\n",c1*100*10/1024/1024,c2*200*10/1024/1024-500); } void AHT20_Read_CTdata_crc(uint16_t *ct) //CRC校验后，读取AHT20的温度和湿度数据 { uint8_t Byte_1th[1]={0}; uint8_t Byte_2th[1]={0}; uint8_t Byte_3th[1]={0}; uint8_t Byte_4th[1]={0}; uint8_t Byte_5th[1]={0}; uint8_t Byte_6th[1]={0}; uint8_t Byte_7th[1]={0}; uint16_t RetuData = 0; uint16_t cnt = 0; // uint8_t CRCDATA=0; uint8_t CTDATA[7]={0};//用于CRC传递数组 abc(); vTaskDelay(80 / portTICK_RATE_MS);//延时80ms左右 cnt = 0; while(((AHT20_Read_Status()&0x80)==0x80))//直到状态bit[7]为0，表示为空闲状态，若为1，表示忙状态 { vTaskDelay(1 / portTICK_RATE_MS); if(cnt++>=100) { break; } } i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x71, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_1th[0],ACK_CHECK_EN);//状态字，查询到状态为0x98,表示为忙状态，bit[7]为1；状态为0x1C，或者0x0C，或者0x08表示为空闲状态，bit[7]为0 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_2th[0],ACK_CHECK_EN);//湿度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_3th[0],ACK_CHECK_EN);//湿度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_4th[0],ACK_CHECK_EN);//湿度/温度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_5th[0],ACK_CHECK_EN);//温度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_6th[0],ACK_CHECK_EN);//温度 vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&Byte_7th[0],ACK_CHECK_DIS);//CRC数据 vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); CTDATA[0]=Byte_1th[0]; CTDATA[1]=Byte_2th[0]; CTDATA[2]=Byte_3th[0]; CTDATA[3]=Byte_4th[0]; CTDATA[4]=Byte_5th[0]; CTDATA[5]=Byte_6th[0]; if(Calc_CRC8(CTDATA,6)==Byte_7th[6]) { RetuData = (RetuData|Byte_2th[0])<<8; RetuData = (RetuData|Byte_3th[0])<<8; RetuData = (RetuData|Byte_4th[0]); RetuData =RetuData >>4; ct[0] = RetuData;//湿度 RetuData = 0; RetuData = (RetuData|Byte_4th[0])<<8; RetuData = (RetuData|Byte_5th[0])<<8; RetuData = (RetuData|Byte_6th[0]); RetuData = RetuData&0xfffff; ct[1] =RetuData; //温度 } else { ct[0]=0x00; ct[1]=0x00;//校验错误返回值，客户可以根据自己需要更改 }//CRC数据 } void AHT20_Init(void) //初始化AHT20 { i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x70, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0xa8, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x00, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x00, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); vTaskDelay(10 / portTICK_RATE_MS);//延时10ms左右 cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x70, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0xbe, ACK_CHECK_EN);//0xBE初始化命令，AHT20的初始化命令是0xBE, AHT10的初始化命令是0xE1 vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x08, ACK_CHECK_EN);//相关寄存器bit[3]置1，为校准输出 vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x00, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); vTaskDelay(10 / portTICK_RATE_MS);//延时10ms左右 } void JH_Reset_REG(uint8_t addr) { uint8_t CTDATA1[1]={0}; uint8_t CTDATA2[1]={0}; uint8_t CTDATA3[1]={0}; i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x70, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, addr, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x00, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x00, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); vTaskDelay(10 / portTICK_RATE_MS); //延时5ms左右 cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x71, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&CTDATA1[0],ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&CTDATA2[0],ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_read_byte(cmd,&CTDATA3[0],ACK_CHECK_DIS); vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); vTaskDelay(10 / portTICK_RATE_MS);//延时10ms左右 cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0x70, ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, 0xB0|addr, ACK_CHECK_EN); vTaskDelay(2 / 1000);//寄存器命令 i2c_master_write_byte(cmd, CTDATA2[0], ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_write_byte(cmd, CTDATA3[0], ACK_CHECK_EN); vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); } void AHT20_Start_Init(void) { JH_Reset_REG(0x1b); JH_Reset_REG(0x1c); JH_Reset_REG(0x1e); } ags02ma气体传感器 MYI2C_Struct SENx; /******************************************************************************* * Function Name : MYI2C_Init * Description : 初始化I2C引脚与ASG02MA结构体变量 * Input : ReadTim 每隔ms时间读取AGS02MA模块 xAddr AGS02MA模块通讯地址 * Output : None * Return : None *******************************************************************************/ //MYI2C_Init(&SENx,100,0x1A); void MYI2C_Init(MYI2C_Struct *pSENSOR,unsigned int ReadTim,unsigned char xAddr) { pSENSOR->Adrr=xAddr; pSENSOR->RegAddr=0x11;上电读版本 if(ReadTim<100)ReadTim=200; pSENSOR->SetRTim=ReadTim; } /******************************************************************************* * Function Name : MYI2C_READ_FUNC * Description : IIC主机读取从机数据 * Input : pSENSOR存放读出数据 device_addr从机地址 register_addr寄存器地址 len读出数据的长度 单位：byte * Output : None * Return : 0：读取数据成功 1：读取数据失败 *******************************************************************************/ unsigned char MYI2C_READ_FUNC(MYI2C_Struct *pSENSOR,unsigned char device_addr,signed char register_addr, unsigned char len) { unsigned int TimeOut=9999; unsigned char i=0; if(register_addr>=0) { /* Send STRAT condition a second time */ i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); /* Send slave address for Write Regsiter */ //MYI2C_Write_IIC_Byte( (device_addr<<1) + 0); i2c_master_write_byte(cmd, (device_addr<<1) + 0, ACK_CHECK_EN); /* ack */ //if(MYI2C_IIC_Wait_Ack(255)==0)TimeOut=0; vTaskDelay(2 / 1000); /* Send register_addr */ //MYI2C_Write_IIC_Byte( (register_addr)); i2c_master_write_byte(cmd, register_addr, ACK_CHECK_EN); /* Test on EV6 and clear it */ //if(MYI2C_IIC_Wait_Ack(255)==0)TimeOut=0; vTaskDelay(2 / 1000); i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); vTaskDelay(10 / portTICK_RATE_MS); } /* Send STRAT condition a second time */ i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); /* Send slave address for Read */ //MYI2C_Write_IIC_Byte( (device_addr<<1)+1 ); i2c_master_write_byte(cmd, (device_addr<<1)+1, ACK_CHECK_EN); /* ack */ //if(MYI2C_IIC_Wait_Ack(255)==0)TimeOut=0; vTaskDelay(2 / 1000); /* While there is data to be read */ while(i { //TimeOut--; //pSENSOR->ReadByte[i]=MYI2C_Read_IIC_Byte(); if(i!=(len-1))i2c_master_read_byte(cmd,&pSENSOR->ReadByte[i],ACK_CHECK_EN); else i2c_master_read_byte(cmd,&pSENSOR->ReadByte[i],ACK_CHECK_DIS); /* Acknowledgement */ //MYI2C_IIC_Ack(len-1-i);//len = 1 NoAck vTaskDelay(1 / 1000); i++; } /* Send STOP Condition */ i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); // I2C_ClearFlag(pSENSOR->pPORT,I2C_FLAG_TIMEOUT); //if(TimeOut){pSENSOR->ErrFlag=0;return 0;} //else {pSENSOR->ErrFlag++;return 1;} return 1; } /******************************************************************************* * Function Name : MYI2C_WRITE_FUNC * Description : IIC主机向从机写入数据 * Input : pSENSOR主机需要发送给从机的数据 device_addr从机地址 register_addr寄存器地址 len读出数据的长度 单位：byte * Return : 0：读取数据成功 1：读取数据失败 *******************************************************************************/ unsigned char MYI2C_WRITE_FUNC(MYI2C_Struct *pSENSOR,unsigned char device_addr,unsigned char register_addr, unsigned char *pDATA, unsigned char len) { unsigned int TimeOut=9999; /* Send STRAT condition */ i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_master_start(cmd); vTaskDelay(2 / 1000); /* Send EEPROM address for write */ //MYI2C_Write_IIC_Byte( (device_addr<<1) + 0); i2c_master_write_byte(cmd, (device_addr<<1) + 0, ACK_CHECK_EN); /* Test on EV6 and clear it */ vTaskDelay(2 / 1000); /* Send register_addr for read */ //MYI2C_Write_IIC_Byte( (register_addr)); i2c_master_write_byte(cmd, register_addr, ACK_CHECK_EN); /* Test on EV6 and clear it */ vTaskDelay(2 / 1000); while(/*TimeOut &&*/len)// { /* Send the byte to be written */ //MYI2C_Write_IIC_Byte( *pDATA); i2c_master_write_byte(cmd, *pDATA, ACK_CHECK_EN); /* Acknowledgement */ //MYI2C_IIC_Wait_Ack(9); vTaskDelay(2 / 1000); pDATA++; len--; //TimeOut--; } /* Send STOP condition */ i2c_master_stop(cmd); i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_RATE_MS); i2c_cmd_link_delete(cmd); //if(TimeOut){pSENSOR->ErrFlag=0;return 0;} //else {pSENSOR->ErrFlag++;return 1;} return 1; } /******************************************************************************* * Function Name : CheckCrc * Description : CRC校验 * Input : *pDAT需要进行CRC校验的数据 Lenth进行CRC校验的数据长度 单位：byte * Output : None * Return : CRC校验码 *******************************************************************************/ unsigned char CheckCrc8(unsigned char *pDAT,unsigned char Lenth) { unsigned char crc = 0xff, i, j; for (i = 0; i < Lenth ; i++) { crc = crc ^ *pDAT; for (j = 0; j < 8; j++) { if (crc & 0x80) crc = (crc << 1) ^ 0x31; else crc <<= 1; } pDAT++; } return crc; } /******************************************************************************* * Function Name : MYI2C_Handle * Description : 读取AGS02MA的版本号与输出的TVOC数据 * Input : *pSENSOR存放与AGS02MA通讯的相关数据 * Output : None * Return : None *******************************************************************************/ void MYI2C_Handle(MYI2C_Struct *pSENSOR) { pSENSOR->timcnt+=1; if(pSENSOR->timcnt > pSENSOR->SetRTim) { pSENSOR->timcnt=0; MYI2C_READ_FUNC(pSENSOR,pSENSOR->Adrr,pSENSOR->RegAddr,5); pSENSOR->ReadByte[5]=CheckCrc8(&pSENSOR->ReadByte[0],4); ESP_LOGW(TAG, "check:%0.2X--%0.2X--%0.2X--%0.2X--%0.2X--%0.2X", pSENSOR->ReadByte[0],pSENSOR->ReadByte[1], pSENSOR->ReadByte[2],pSENSOR->ReadByte[3], pSENSOR->ReadByte[4],pSENSOR->ReadByte[5]); if(pSENSOR->ReadByte[5]==pSENSOR->ReadByte[4]) { //ESP_LOGW(TAG, "pSENSOR->RegAddr:%d", pSENSOR->RegAddr); if(pSENSOR->RegAddr==0x00) { pSENSOR->RegAddr=0x00; pSENSOR->Status=pSENSOR->ReadByte[0]; pSENSOR->PPBVal=pSENSOR->ReadByte[1];//TVOC ppb数值 pSENSOR->PPBVal=pSENSOR->PPBVal<<8; pSENSOR->PPBVal+=pSENSOR->ReadByte[2]; pSENSOR->PPBVal=pSENSOR->PPBVal<<8; pSENSOR->PPBVal+=pSENSOR->ReadByte[3]; ESP_LOGW(TAG, "TVOC:%d--%d", pSENSOR->PPBVal, pSENSOR->Status); } else if(pSENSOR->RegAddr==0x11) { pSENSOR->RegAddr=0x00; pSENSOR->year=pSENSOR->ReadByte[0]; pSENSOR->month=pSENSOR->ReadByte[1]; pSENSOR->day=pSENSOR->ReadByte[2]; pSENSOR->SoftVer=pSENSOR->ReadByte[3]; //版本号 pSENSOR->ReadByte[3]=0; } } } }