写一段SHT3X的单片机例程
时间: 2023-07-10 11:03:31 浏览: 60
以下是一个基于STM32的SHT3X温湿度传感器的例程:
```c
#include "stm32f1xx_hal.h"
#include "sht3x.h"
I2C_HandleTypeDef hi2c1;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_I2C1_Init();
SHT3X_Init(&hi2c1);
while (1)
{
float temp, humid;
SHT3X_GetTempHumid(&temp, &humid);
// Do something with temp and humid values
HAL_Delay(1000);
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
}
static void MX_I2C1_Init(void)
{
hi2c1.Instance = I2C1;
hi2c1.Init.ClockSpeed = 400000;
hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
static void MX_GPIO_Init(void)
{
__HAL_RCC_GPIOD_CLK_ENABLE();
}
void SHT3X_Init(I2C_HandleTypeDef *hi2c)
{
// Reset sensor
uint8_t data[] = {0x80, 0x5D};
HAL_I2C_Master_Transmit(hi2c, SHT3X_I2C_ADDR, data, sizeof(data), HAL_MAX_DELAY);
// Configure sensor
data[0] = 0x24;
data[1] = 0x00;
HAL_I2C_Master_Transmit(hi2c, SHT3X_I2C_ADDR, data, sizeof(data), HAL_MAX_DELAY);
}
void SHT3X_GetTempHumid(float *temp, float *humid)
{
uint8_t data[] = {0x24, 0x00};
HAL_I2C_Master_Transmit(&hi2c1, SHT3X_I2C_ADDR, data, sizeof(data), HAL_MAX_DELAY);
HAL_Delay(10);
uint8_t buff[6];
HAL_I2C_Master_Receive(&hi2c1, SHT3X_I2C_ADDR, buff, sizeof(buff), HAL_MAX_DELAY);
// Calculate temperature
*temp = (175.0f * ((buff[0] << 8) | buff[1]) / 65535.0f) - 45.0f;
// Calculate humidity
*humid = (100.0f * ((buff[3] << 8) | buff[4]) / 65535.0f);
}
```
这个例程包括了初始化I2C、初始化传感器、读取温湿度值等功能。您需要根据自己的单片机平台和I2C库进行适当的修改。