Testing SPI communication

Here is a simple code written in c to test the SPI communication using atmega16 the avr code vision compiler is used here.

>> In SPI communication : one uc is programmed as a master (initiates communication) and the other uc is programmed as a slave.

Here is the master C code

// SPI initialization

// SPI Type: Master

// SPI Clock Rate: 1000.000 kHz

// SPI Clock Phase: Cycle Half

// SPI Clock Polarity: Low

// SPI Data Order: MSB First

SPCR=0x50;

SPSR=0x00;

while (1)

      {

      // Place your code here

      PORTB.4=0;

      SPDR=PINA;

      while(SPSR.7==0)

      {}

      status=SPSR;

      PORTC=SPDR;

      };

Here is the slave C code

// SPI initialization
// SPI Type: Slave
// SPI Clock Rate: 1000.000 kHz
// SPI Clock Phase: Cycle Half
// SPI Clock Polarity: Low
// SPI Data Order: MSB First
SPCR=0x40;
SPSR=0x00;

while (1)
      {
      // Place your code here
      SPDR=PINA;
      while(SPSR.7==0)
      {}
      status=SPSR;
      PORTC=SPDR;
      };

Proteus simulation

Here is the link of the master and slave codevision projects and proteus simulation :

download here 

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