Temperature acquisition of STM32C031

lugl4313820

Temperature acquisition of STM32C031 [Copy link]

stm32C031 is used for temperature acquisition, this time sht20 is used. First, the sht20 driver code is:

#include "sht20.h"
#include "main.h"
#include <stdio.h>

unsigned char SHT20_SoftReset(void)
{
	uint8_t buffer =SHT20_SOFT_RESET;
	if(HAL_OK==HAL_I2C_Master_Transmit(&hi2c1, SHT20_Write_Add, &buffer, 1, 1000))
	{
		printf("成功\r\n");
		return 0;
	}
	else
	{		
		printf("失败\r\n");
		return 1;
	}
}

unsigned char SHT20_Read_Reg(void)
{
	uint8_t buffer =SHT20_READ_REG;
	if(HAL_OK==HAL_I2C_Master_Transmit(&hi2c1, SHT20_Write_Add, &buffer, 1, 1000))
	{
		if(HAL_OK==HAL_I2C_Master_Receive(&hi2c1, SHT20_Write_Add, &buffer, 1, 1000))
			{
				return buffer;
			}
			else
				{		
					return 1;
				}
	}
	else
	{		
		return 1;
	}

}
unsigned char SHT20_Config(void)//采集温度为14位，采集湿度为12位
{
	uint8_t val;
	val =	(SHT20_Read_Reg()&0x7E)|0x00;
	if(HAL_OK==HAL_I2C_Mem_Write(&hi2c1, (uint16_t)SHT20_Write_Add, (uint16_t)SHT20_WRITE_REG, (uint16_t)I2C_MEMADD_SIZE_8BIT, &val, 1, 1000))
	{
		return 0;
	}
	else
	{
		return 1;
	}
}


void SHT20_Init()
{
	if(SHT20_SoftReset())
	{
		printf("SHT20 复位失败\r\n");
	}
	else
	{
		printf("SHT20 复位成功\r\n");
	}
	HAL_Delay(100);
	if(SHT20_Config())
	{
		printf("初始化失败\r\n");
	}
	else
	{
		printf("初始化成功\r\n");
	}
}

float SHT20_GetTemperature(void)
{
	uint8_t val[3];
	if(HAL_OK==HAL_I2C_Mem_Read(&hi2c1, (uint16_t)SHT20_Write_Add, (uint16_t)SHT20_Measurement_T_HM, (uint16_t)I2C_MEMADD_SIZE_8BIT, val, 3, 1000))
	{
		return (-46.85 + (175.72 * (((val[0]<<8)|(val[1]&0xFC))) / 65536.0));
	}
	else
	{
		printf("error\r\n");
	}
	return -1;
}

float SHT20_GetHumidity(void)
{
	uint8_t val[3];
	if(HAL_OK==HAL_I2C_Mem_Read(&hi2c1, (uint16_t)SHT20_Write_Add, (uint16_t)SHT20_Measurement_RH_HM, (uint16_t)I2C_MEMADD_SIZE_8BIT, val, 3, 1000))
	{
		return -6+125*(((val[0]<<8)|(val[1]&0xF0))/65536.0);
	}
	else
	{
		printf("error\r\n");
	}
	return -1;
}

lugl4313820

sht20 header file:

#ifndef __SHT20_H
#define __SHT20_H

#include "main.h"

/*SHT20 */
#define SHT20_ADDRESS  0X40
#define SHT20_Write_Add 0x80   
#define SHT20_Read_Add 0x81
#define SHT20_Measurement_RH_HM  0XE5
#define SHT20_Measurement_T_HM  0XE3
#define SHT20_Measurement_RH_NHM  0XF5  
#define SHT20_Measurement_T_NHM  0XF3   
#define SHT20_READ_REG  0XE7
#define SHT20_WRITE_REG  0XE6
#define SHT20_SOFT_RESET  0XFE

extern I2C_HandleTypeDef hi2c1;
void SHT20_Init(void);
unsigned char SHT20_SoftReset(void);
unsigned char SHT20_Read_Reg(void);
float SHT20_GetTemperature(void);
float SHT20_GetHumidity(void);




#endif

秦天qintian0303

Is there a temperature sensor inside the chip?

lugl4313820

Qintianqintian0303 posted on 2023-4-10 08:24 Is there a temperature collection function in the film?

I haven't paid attention to this. The temperature inside the chip can only reflect the condition of the chip, which is quite different from the environment.

jobszheng5

Qintianqintian0303 posted on 2023-4-10 08:24 Is there a temperature collection function in the film?

This temperature sampling is different from the temperature sampling we usually talk about.

It is indeed easy to be confused just looking at the datasheet

damiaa

SHT2X 3X 4X is still good if you have a high temperature requirement and want to use a digital temperature chip.

可以去你家玩嘛

I am learning 32 now, and I am confused when I see these. I will come back and try it after I learn it. Thanks for sharing, the word count should be enough.

lugl4313820

Can I come to your house to play? Posted on 2023-4-10 17:00 I am learning 32, and I am confused when I see these. I will come back and try it after I learn it. Thanks for sharing, the word count should be enough

Yes, you can get points if you reply with more than 20 words.

今天下午

Can the temperature acquisition of STM32C031 be called in other languages?

lugl4313820

Published this afternoon at 2023-4-11 16:21 Can the temperature acquisition of STM32C031 be called in other languages?

Yes, you can use C++ or Python. You need a corresponding compiler.