stm32用iic协议获取MS5837-30BA 水深传感器数据，写一下完整的c代码

好的，以下是使用STM32通过I2C协议获取MS5837-30BA水深传感器数据的C代码示例：

首先，需要包含STM32 HAL库和I2C驱动库的头文件：

#include "stm32f1xx_hal.h"
#include "stm32f1xx_hal_i2c.h"

然后，定义I2C接口的相关参数，包括通道号、地址、时钟速度等：

#define I2C_CHANNEL             I2C1
#define I2C_ADDRESS             0xEC
#define I2C_SPEED               100000

接下来，初始化I2C接口，需要使用HAL库提供的函数来完成：

void I2C_Init(void)
{
  I2C_HandleTypeDef hi2c;

  hi2c.Instance = I2C_CHANNEL;
  hi2c.Init.ClockSpeed = I2C_SPEED;
  hi2c.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c.Init.OwnAddress1 = 0;
  hi2c.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c.Init.DualAddressMode = I2C_DUALADDRESS_DISABLED;
  hi2c.Init.OwnAddress2 = 0;
  hi2c.Init.GeneralCallMode = I2C_GENERALCALL_DISABLED;
  hi2c.Init.NoStretchMode = I2C_NOSTRETCH_DISABLED;

  if (HAL_I2C_Init(&hi2c) != HAL_OK)
  {
    //初始化失败
  }
}

接着，定义获取MS5837-30BA数据的函数，该函数的实现需要按照I2C协议的规范进行操作，具体细节可以参考MS5837-30BA数据手册：

uint8_t MS5837_Read_Reg(uint8_t reg)
{
  uint8_t data;

  HAL_I2C_Master_Transmit(&hi2c1, I2C_ADDRESS, &reg, 1, 1000);
  HAL_I2C_Master_Receive(&hi2c1, I2C_ADDRESS, &data, 1, 1000);

  return data;
}

void MS5837_Write_Reg(uint8_t reg, uint8_t value)
{
  uint8_t data[2];

  data[0] = reg;
  data[1] = value;

  HAL_I2C_Master_Transmit(&hi2c1, I2C_ADDRESS, data, 2, 1000);
}

void MS5837_Read_Prom(void)
{
  uint8_t rx_buf[2];

  for (uint8_t i = 0; i < 8; i++)
  {
    uint8_t cmd = 0b10100000 | (i << 1);
    HAL_I2C_Master_Transmit(&hi2c1, I2C_ADDRESS, &cmd, 1, 1000);
    HAL_I2C_Master_Receive(&hi2c1, I2C_ADDRESS, rx_buf, 2, 1000);

    //解析PROM数据
  }
}

void MS5837_Read_Data(void)
{
  uint8_t cmd;

  //读取温度
  cmd = 0b11100000;
  HAL_I2C_Master_Transmit(&hi2c1, I2C_ADDRESS, &cmd, 1, 1000);
  HAL_Delay(20);   //等待转换完成
  uint32_t D2 = MS5837_Read_Reg(0x00) << 16;
  D2 |= MS5837_Read_Reg(0x01) << 8;
  D2 |= MS5837_Read_Reg(0x02);

  //读取压力
  cmd = 0b11110000;
  HAL_I2C_Master_Transmit(&hi2c1, I2C_ADDRESS, &cmd, 1, 1000);
  HAL_Delay(20);   //等待转换完成
  uint32_t D1 = MS5837_Read_Reg(0x00) << 16;
  D1 |= MS5837_Read_Reg(0x01) << 8;
  D1 |= MS5837_Read_Reg(0x02);

  //计算深度
  // ...
}

最后，在主函数中调用上述函数即可获取MS5837-30BA水深传感器的数据：

int main(void)
{
  HAL_Init();

  I2C_Init();
  MS5837_Read_Prom();
  while (1)
  {
    MS5837_Read_Data();
    // ...
  }
}