使用stm32f103c8t6标准库写一个多个INA3221模块使用IIC

好的，下面是使用STM32F103C8T6标准库控制多个INA3221模块的IIC通信的示例代码：

首先，需要定义IIC通信所需的引脚和地址：

#define INA3221_I2C          I2C1
#define INA3221_I2C_RCC      RCC_APB1Periph_I2C1
#define INA3221_I2C_GPIO     GPIOB
#define INA3221_I2C_SCL_PIN  GPIO_Pin_6
#define INA3221_I2C_SDA_PIN  GPIO_Pin_7
#define INA3221_I2C_SPEED    100000
#define INA3221_ADDRESS      0x40

然后，需要定义用于INA3221通信的函数：

void INA3221_I2C_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  I2C_InitTypeDef   I2C_InitStructure;

  /* Enable I2C and GPIO clocks */
  RCC_APB1PeriphClockCmd(INA3221_I2C_RCC, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  /* Configure I2C pins: SCL and SDA */
  GPIO_InitStructure.GPIO_Pin = INA3221_I2C_SCL_PIN | INA3221_I2C_SDA_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
  GPIO_Init(INA3221_I2C_GPIO, &GPIO_InitStructure);

  /* Configure I2C */
  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
  I2C_InitStructure.I2C_OwnAddress1 = 0x00;
  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_InitStructure.I2C_ClockSpeed = INA3221_I2C_SPEED;
  I2C_Init(INA3221_I2C, &I2C_InitStructure);

  /* Enable I2C */
  I2C_Cmd(INA3221_I2C, ENABLE);
}

uint8_t INA3221_I2C_ReadReg(uint8_t reg)
{
  uint8_t data = 0;

  /* Send start condition */
  I2C_GenerateSTART(INA3221_I2C, ENABLE);

  /* Wait until start condition is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send INA3221 address for writing */
  I2C_Send7bitAddress(INA3221_I2C, INA3221_ADDRESS, I2C_Direction_Transmitter);

  /* Wait until address is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

  /* Send register address */
  I2C_SendData(INA3221_I2C, reg);

  /* Wait until data is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send repeated start condition */
  I2C_GenerateSTART(INA3221_I2C, ENABLE);

  /* Wait until start condition is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send INA3221 address for reading */
  I2C_Send7bitAddress(INA3221_I2C, INA3221_ADDRESS, I2C_Direction_Receiver);

  /* Wait until address is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

  /* Wait until data is received */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_BYTE_RECEIVED));

  /* Read data */
  data = I2C_ReceiveData(INA3221_I2C);

  /* Send stop condition */
  I2C_GenerateSTOP(INA3221_I2C, ENABLE);

  return data;
}

void INA3221_I2C_WriteReg(uint8_t reg, uint8_t data)
{
  /* Send start condition */
  I2C_GenerateSTART(INA3221_I2C, ENABLE);

  /* Wait until start condition is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send INA3221 address for writing */
  I2C_Send7bitAddress(INA3221_I2C, INA3221_ADDRESS, I2C_Direction_Transmitter);

  /* Wait until address is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

  /* Send register address */
  I2C_SendData(INA3221_I2C, reg);

  /* Wait until data is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send data */
  I2C_SendData(INA3221_I2C, data);

  /* Wait until data is sent */
  while (!I2C_CheckEvent(INA3221_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send stop condition */
  I2C_GenerateSTOP(INA3221_I2C, ENABLE);
}

最后，可以使用上述函数来读取或写入多个INA3221模块的寄存器。

例如，如果有两个INA3221模块，地址分别为0x40和0x41，则可以使用以下代码来读取第一个模块的电流寄存器：

uint16_t current = (INA3221_I2C_ReadReg(0x40) << 8) | INA3221_I2C_ReadReg(0x41);

或者使用以下代码来写入第二个模块的电压警报上限寄存器：

INA3221_I2C_WriteReg(0x45, 0x12);

希望这可以帮助你控制多个INA3221模块的IIC通信。