在STM32WLE5CCU6官网发出的I2C官方例程中怎么修改成用I2C2控制CHTA30IW来读取温湿度

首先，需要在STM32WLE5CCU6上初始化I2C2，并将其连接到CHTA30IW。然后，可以使用以下代码来读取温湿度数据：

#include "stm32_w1xx_hal.h"

#define CHTA30_I2C_ADDRESS 0x80
#define CHTA30_TEMPERATURE_REG 0x00
#define CHTA30_HUMIDITY_REG 0x01

I2C_HandleTypeDef hi2c2;

void CHTA30_ReadTempHumidity(float *temperature, float *humidity)
{
  uint8_t data[4];
  uint16_t raw_temp, raw_humidity;

  // Send temperature measurement command
  data[0] = CHTA30_TEMPERATURE_REG;
  HAL_I2C_Master_Transmit(&hi2c2, CHTA30_I2C_ADDRESS, data, 1, HAL_MAX_DELAY);

  // Wait for measurement to complete
  HAL_Delay(50);

  // Read temperature data
  HAL_I2C_Master_Receive(&hi2c2, CHTA30_I2C_ADDRESS, data, 2, HAL_MAX_DELAY);
  raw_temp = (data[0] << 8) | data[1];
  *temperature = ((float)raw_temp / 65536.0) * 165.0 - 40.0;

  // Send humidity measurement command
  data[0] = CHTA30_HUMIDITY_REG;
  HAL_I2C_Master_Transmit(&hi2c2, CHTA30_I2C_ADDRESS, data, 1, HAL_MAX_DELAY);

  // Wait for measurement to complete
  HAL_Delay(50);

  // Read humidity data
  HAL_I2C_Master_Receive(&hi2c2, CHTA30_I2C_ADDRESS, data, 2, HAL_MAX_DELAY);
  raw_humidity = (data[0] << 8) | data[1];
  *humidity = ((float)raw_humidity / 65536.0) * 100.0;
}

该函数将读取温度和湿度数据，并将其存储在传递给函数的指针中。请注意，此代码假定I2C2已正确初始化，并且其速率已设置为100kHz。如果您需要更改这些设置，请在代码中进行相应更改。