پروژه ماشین حساب با ATmega32

An ATMega32-based Data Acquisition System

AD7927: 8Channel 200kSPS 12Bit SPI ADC

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u08 ad7927Init(void)

{

  // initialize spi interface

  spiInit(); 

  // switch to f/4 bitrate

  cbi(SPCR, SPR0);

  cbi(SPCR, SPR1);

  // setup chip select

  sbi(AD7927_CS_PORT, AD7927_CS_PIN);

  sbi(AD7927_CS_DDR, AD7927_CS_PIN); 

  // Set write bit, power mode normal, range 0-5V, coding straight binary

  ad7927ctrlreg = (1<<AD7927_WRITE)|(1<<AD7927_PM1)|(1<<AD7927_PM0)|(1<<AD7927_CODING);

  ad7927WriteCtrlReg(ad7927ctrlreg);

  // return success

  return 1;

}

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AD5664: Quad 2.7-5.5V 16bit SPI DAC

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u08 ad5664Init(void)

{

  // initialize spi interface

  spiInit(); 

  // switch to f/4 bitrate

  cbi(SPCR, SPR0);

  cbi(SPCR, SPR1); 

  // setup chip select

  sbi(AD5664_CS_PORT, AD5664_CS_PIN);

  sbi(AD5664_CS_DDR, AD5664_CS_PIN); 

  ad5664cmd = AD5664_CMD_IREF;

  ad5664data = AD5664_IREF_ON; 

  ad5664WriteShftReg();

  // return success

  return 1;

}

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