用esp8266模块,写一个I2C总线采集SHT20温湿度传感器的程序,写出来C程序
时间: 2023-03-14 14:12:04 浏览: 59
你可以尝试使用以下程序:#include <Wire.h>
#include <SHT20.h>SHT20 sht20;void setup(){
Wire.begin();
Serial.begin(9600);
}void loop(){
float temperature, humidity;
sht20.read(&temperature, &humidity);
Serial.print("温度:");
Serial.print(temperature);
Serial.print("℃,湿度:");
Serial.print(humidity);
Serial.println("%");
delay(1000);
}
相关问题
写一段HC32L170利用I2C接口进行通讯,采集SHT30温湿度传感器数据的程序,用小华半导体提供的i2n样例改写
好的,以下是一个简单的HC32L170利用I2C接口进行通讯,采集SHT30温湿度传感器数据的程序,基于小华半导体提供的i2c样例进行改写:
```c
#include "hc32_gpio.h"
#include "hc32_i2c.h"
#define SHT30_ADDR 0x44 // SHT30的I2C从机地址
#define CMD_MEASURE 0x2C06 // 采集温湿度命令
#define CMD_RESET 0x30A2 // 复位命令
static stc_i2c_config_t stcI2cCfg;
void I2C_Configuration(void)
{
/* 使能I2C模块的时钟 */
Sysctrl_SetPeripheralGate(SysctrlPeripheralI2c1, TRUE);
/* 配置I2C的时钟分频系数 */
stcI2cCfg.u32Baudrate = 100000UL;
stcI2cCfg.enI2cMode = I2cMaster;
stcI2cCfg.u8SlaveAddr = 0;
stcI2cCfg.bWaitSelection = FALSE;
stcI2cCfg.bDmaEnable = FALSE;
stcI2cCfg.bIrqEnable = FALSE;
I2C_Init(I2C1, &stcI2cCfg);
}
void SHT30_Reset(void)
{
uint8_t u8Data[2];
u8Data[0] = CMD_RESET >> 8;
u8Data[1] = CMD_RESET & 0xFF;
/* 发送复位命令 */
I2C_Start(I2C1);
I2C_SendData(I2C1, SHT30_ADDR << 1);
I2C_CheckAck(I2C1);
I2C_SendData(I2C1, u8Data[0]);
I2C_CheckAck(I2C1);
I2C_SendData(I2C1, u8Data[1]);
I2C_CheckAck(I2C1);
I2C_Stop(I2C1);
}
void SHT30_Measure(float *pfTemp, float *pfHumi)
{
uint8_t u8Data[6];
uint16_t u16RawTemp, u16RawHumi;
/* 发送采集命令 */
u8Data[0] = CMD_MEASURE >> 8;
u8Data[1] = CMD_MEASURE & 0xFF;
I2C_Start(I2C1);
I2C_SendData(I2C1, SHT30_ADDR << 1);
I2C_CheckAck(I2C1);
I2C_SendData(I2C1, u8Data[0]);
I2C_CheckAck(I2C1);
I2C_SendData(I2C1, u8Data[1]);
I2C_CheckAck(I2C1);
I2C_Stop(I2C1);
/* 等待采集完成 */
Ddl_Delay1ms(20); // SHT30最大采集时间为15ms
/* 读取采集数据 */
I2C_Start(I2C1);
I2C_SendData(I2C1, (SHT30_ADDR << 1) | 1);
I2C_CheckAck(I2C1);
u8Data[0] = I2C_ReceiveData(I2C1);
I2C_Ack(I2C1);
u8Data[1] = I2C_ReceiveData(I2C1);
I2C_Ack(I2C1);
u8Data[2] = I2C_ReceiveData(I2C1);
I2C_Ack(I2C1);
u8Data[3] = I2C_ReceiveData(I2C1);
I2C_Ack(I2C1);
u8Data[4] = I2C_ReceiveData(I2C1);
I2C_Ack(I2C1);
u8Data[5] = I2C_ReceiveData(I2C1);
I2C_Nack(I2C1);
I2C_Stop(I2C1);
/* 计算温度和湿度 */
u16RawTemp = (u8Data[0] << 8) | u8Data[1];
u16RawHumi = (u8Data[3] << 8) | u8Data[4];
*pfTemp = -45.0 + 175.0 * ((float)u16RawTemp / 65535.0);
*pfHumi = 100.0 * ((float)u16RawHumi / 65535.0);
}
int main(void)
{
float fTemp, fHumi;
/* 初始化I2C模块 */
I2C_Configuration();
/* 复位SHT30传感器 */
SHT30_Reset();
while (1)
{
/* 采集温湿度数据 */
SHT30_Measure(&fTemp, &fHumi);
/* 在这里可以对采集到的温湿度数据进行处理和输出 */
}
}
```
以上代码实现了HC32L170通过I2C接口与SHT30温湿度传感器进行通信,发送复位命令和采集命令,读取采集数据并计算温度和湿度数据。在实际应用中,可以根据需要对采集到的数据进行输出或处理。
模拟I2C实现温湿度传感器SHT20的的no hold master的读取温度的程序
以下是模拟I2C实现SHT20温湿度传感器的no hold master的读取温度的程序示例:
```c
#include <stdio.h>
#include <stdlib.h>
#include <wiringPi.h>
#define I2C_SDA_PIN 2
#define I2C_SCL_PIN 3
#define SHT20_I2C_ADDR 0x40
// 定义SHT20芯片命令
#define SHT20_MEASURE_TEMP_NO_HOLD 0xF3
// I2C总线初始化
void i2c_init() {
wiringPiSetup();
pinMode(I2C_SDA_PIN, OUTPUT);
pinMode(I2C_SCL_PIN, OUTPUT);
}
// I2C总线开始信号
void i2c_start() {
digitalWrite(I2C_SDA_PIN, HIGH);
digitalWrite(I2C_SCL_PIN, HIGH);
delayMicroseconds(5);
digitalWrite(I2C_SDA_PIN, LOW);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
}
// I2C总线停止信号
void i2c_stop() {
digitalWrite(I2C_SCL_PIN, LOW);
digitalWrite(I2C_SDA_PIN, LOW);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, HIGH);
delayMicroseconds(5);
digitalWrite(I2C_SDA_PIN, HIGH);
delayMicroseconds(5);
}
// I2C总线发送一个字节数据
void i2c_write_byte(unsigned char data) {
int i;
for (i = 0; i < 8; i++) {
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
if (data & 0x80) {
digitalWrite(I2C_SDA_PIN, HIGH);
} else {
digitalWrite(I2C_SDA_PIN, LOW);
}
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, HIGH);
delayMicroseconds(5);
data <<= 1;
}
digitalWrite(I2C_SCL_PIN, LOW);
digitalWrite(I2C_SDA_PIN, HIGH);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, HIGH);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
}
// I2C总线读取一个字节数据
unsigned char i2c_read_byte() {
unsigned char data = 0;
int i;
digitalWrite(I2C_SDA_PIN, HIGH);
for (i = 0; i < 8; i++) {
data <<= 1;
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, HIGH);
delayMicroseconds(5);
if (digitalRead(I2C_SDA_PIN)) {
data |= 0x01;
}
delayMicroseconds(5);
}
digitalWrite(I2C_SCL_PIN, LOW);
digitalWrite(I2C_SDA_PIN, HIGH);
delayMicroseconds(5);
return data;
}
// 从SHT20芯片读取温度
float sht20_read_temperature() {
float temperature = 0;
// 发送开始信号
i2c_start();
// 发送设备地址和写命令
i2c_write_byte(SHT20_I2C_ADDR << 1);
// 发送读取温度命令
i2c_write_byte(SHT20_MEASURE_TEMP_NO_HOLD);
// 等待转换完成
delay(100);
// 发送开始信号
i2c_start();
// 发送设备地址和读命令
i2c_write_byte((SHT20_I2C_ADDR << 1) | 0x01);
// 读取温度数据的高字节
unsigned char temp_h = i2c_read_byte();
// 发送ACK信号
digitalWrite(I2C_SDA_PIN, LOW);
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, HIGH);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
// 读取温度数据的低字节
unsigned char temp_l = i2c_read_byte();
// 发送NACK信号
digitalWrite(I2C_SDA_PIN, HIGH);
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, HIGH);
delayMicroseconds(5);
digitalWrite(I2C_SCL_PIN, LOW);
delayMicroseconds(5);
// 计算温度值
int raw_temp = ((unsigned int)temp_h << 8) | temp_l;
temperature = -46.85 + 175.72 * ((float)raw_temp / 65536.0);
// 发送停止信号
i2c_stop();
return temperature;
}
int main() {
// 初始化I2C总线
i2c_init();
// 读取温度并打印
float temperature = sht20_read_temperature();
printf("Temperature: %.2f\n", temperature);
return 0;
}
```
这个程序使用了树莓派的wiringPi库来控制GPIO口模拟I2C总线,通过发送SHT20芯片的控制命令来读取温度数据。请根据具体硬件及引脚连接进行修改。