MSP430 Daten über SPI senden

unsigned char SetExtDAC(unsigned char num, unsigned int data)

{

  //AD5663 Command Byte zusammen bauen:

  if(num == 0)Byte2 = AD5663_Command3 + AD5663_Address0;

  if(num == 1)Byte2 = AD5663_Command3 + AD5663_Address1;

  if(num > 1)return STATUS_ERROR;

  Byte1 = ((data >> 8) & 0xFF);      //High-Byte

  Byte0 = (data & 0xFF);          //LOw-Byte

  SPI1WaitForComplete();          //Senden bereit?

  ResetDevCSA;              //Chip-Select

  TXBUF1 = Byte2;              //Command-Byte absetzen

  SPI1WaitForComplete();

  asm("nop");

  asm("nop");

  TXBUF1 = Byte1;              //Highbyte senden

  SPI1WaitForComplete();

  asm("nop");

  asm("nop");

  TXBUF1 = Byte0;

  SPI1WaitForComplete();

  asm("nop");

  asm("nop");

  SetDevCSA;

  return STATUS_SUCCESS;

}

void SPI1WaitForComplete(void)

{

  while (!(IFG2 & UTXIFG1));                // USART1 TX buffer ready?

  do

  {

    IFG2 &= ~URXIFG1;

  }

  while (URXIFG1 & IFG2); 

}