STM32通过IIC接口控制AD5662驱动程序

以下一个简单的STM32控制AD5662的示例程序：

首先，需要定义IIC接口和AD5662的寄存器地址：

#define I2C_SCL_PIN GPIO_Pin_6
#define I2C_SCL_GPIO_PORT GPIOB
#define I2C_SDA_PIN GPIO_Pin_7
#define I2C_SDA_GPIO_PORT GPIOB
#define I2C_SLAVE_ADDRESS 0x0C

#define AD5662_DEVICE_ID 0x11
#define AD5662_CMD_WRITE_INPUT_REG 0x1
#define AD5662_CMD_UPDATE_DAC_REG 0x2
#define AD5662_DAC_A_REG_ADDR 0x0
#define AD5662_DAC_B_REG_ADDR 0x1

然后，需要初始化IIC接口：

void I2C_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  I2C_InitTypeDef I2C_InitStructure;

  /* Enable I2C and GPIO clocks */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  /* Configure I2C pins */
  GPIO_InitStructure.GPIO_Pin = I2C_SCL_PIN | I2C_SDA_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(I2C_SCL_GPIO_PORT, &GPIO_InitStructure);

  /* Configure I2C */
  I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
  I2C_InitStructure.I2C_OwnAddress1 = I2C_SLAVE_ADDRESS;
  I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_InitStructure.I2C_ClockSpeed = 100000;
  I2C_Init(I2C1, &I2C_InitStructure);

  /* Enable I2C */
  I2C_Cmd(I2C1, ENABLE);
}

接下来，可以编写一个函数来向AD5662的寄存器写入数据：

void AD5662_WriteReg(uint8_t regAddr, uint16_t data)
{
  uint8_t buffer[3];
  buffer[0] = (AD5662_DEVICE_ID << 3) | (regAddr << 1) | (AD5662_CMD_WRITE_INPUT_REG >> 2);
  buffer[1] = (data >> 8) & 0xFF;
  buffer[2] = data & 0xFF;

  /* Send start condition */
  I2C_GenerateSTART(I2C1, ENABLE);

  /* Wait for start condition to be sent */
  while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

  /* Send slave address */
  I2C_Send7bitAddress(I2C1, I2C_SLAVE_ADDRESS, I2C_Direction_Transmitter);

  /* Wait for address to be sent */
  while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

  /* Send data */
  I2C_SendData(I2C1, buffer[0]);
  /* Wait for data to be sent */
  while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  I2C_SendData(I2C1, buffer[1]);
  while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  I2C_SendData(I2C1, buffer[2]);
  while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  /* Send stop condition */
  I2C_GenerateSTOP(I2C1, ENABLE);
}

最后，可以编写一个主函数来设置DAC输出：

int main(void)
{
  /* Initialize I2C */
  I2C_Configuration();

  /* Write data to DAC A register */
  AD5662_WriteReg(AD5662_DAC_A_REG_ADDR, 0x7FFF);

  /* Update DAC output */
  AD5662_WriteReg(AD5662_DAC_B_REG_ADDR, AD5662_CMD_UPDATE_DAC_REG);

  while (1);
}

这个示例程序会将DAC A的输出设置为最大值，并将设置写入DAC B寄存器，然后更新DAC输出。可以根据需要修改数据和寄存器地址。