stm32f103 i2c_read

// Read all registers from Si4703

void Si4703_Read(void) {

  uint8_t i;

  uint8_t buffer[32]; // 16 of 16-bit registers

  I2C_AcknowledgeConfig(I2C_PORT,ENABLE); // Enable I2C acknowledge

  I2C_GenerateSTART(I2C_PORT,ENABLE); // Send START condition

  while (!I2C_CheckEvent(I2C_PORT,I2C_EVENT_MASTER_MODE_SELECT)); // Wait for EV5

  I2C_Send7bitAddress(I2C_PORT,Si4703_ADDR,I2C_Direction_Receiver); // Send slave address for READ

  while (!I2C_CheckEvent(I2C_PORT,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)); // Wait for EV6

  // Si4703 read start from r0Ah register

  for (i = 0x14; ; i++) {

    if (i == 0x20) i = 0x00;

    while (!I2C_CheckEvent(I2C_PORT,I2C_EVENT_MASTER_BYTE_RECEIVED)); // Wait for EV7 (Byte received from slave)

    buffer[i] = I2C_ReceiveData(I2C_PORT); // Receive byte

    if (i == 0x12) break;

  }

  I2C_AcknowledgeConfig(I2C_PORT,DISABLE); // Disable I2C acknowledgment

  I2C_GenerateSTOP(I2C_PORT,ENABLE); // Send STOP condition

  while (!I2C_CheckEvent(I2C_PORT,I2C_EVENT_MASTER_BYTE_RECEIVED)); // Wait for EV7 (Byte received from slave)

  buffer[i++] = I2C_ReceiveData(I2C_PORT); // Receive last byte

  for (i = 0; i < 16; i++) {

    Si4703_REGs[i] = (buffer[i<<1] << 8) | buffer[(i<<1)+1];

  }

}