Subversion Repositories openrisc

/*

  SPI controller simple test

  Do some reads from the SPI slaves. Select a different slave each loop

  and does a read and reports the value.

  Nothing much actually gets tested here.

  Ensure the slave selects for the spi are enabled in orpsoc-defines.v

*/

#include "cpu-utils.h"

#include "simple-spi.h"

#include "orpsoc-defines.h"

// Detect which of the SPI cores are enabled, tailor the test for that

#ifndef SPI1

# ifndef SPI2

#  error

#  error No SPI cores to test with! Please enable SPI1 and/or SPI2

#  error

# else

#  define NUM_SPI_CORES 1

#  define FIRST_SPI_CORE 2

# endif

#else

# ifdef SPI2

#  define NUM_SPI_CORES 2

#  define FIRST_SPI_CORE 1

# else

#  define NUM_SPI_CORES 1

#  define FIRST_SPI_CORE 1

# endif

#endif

int main()

{

  int spi_master = FIRST_SPI_CORE;

  int spi_slave = 2;

  int i;

  // Init the masters

  for (spi_master = FIRST_SPI_CORE;

       spi_master < FIRST_SPI_CORE+ NUM_SPI_CORES;

       spi_master++)

    {

      spi_core_clock_setup(spi_master, 0, 0, 2, 0);

      spi_core_enable(spi_master);

    }

  // Play with the slaves

  for(i=0;i<64;i++)

    {

      for (spi_master = FIRST_SPI_CORE;

           spi_master < FIRST_SPI_CORE+ NUM_SPI_CORES;

           spi_master++)

        {

          spi_slave = i % 3;

          spi_slave = (1 << spi_slave);

          // Select slave on SPI bus

          spi_core_slave_select(spi_master, spi_slave);

          // Do a SPI bus transaction - we're only interested in the read data

          // coming back

          while (!spi_core_write_avail(spi_master));

          spi_core_write_data(spi_master, (i&0xff));

          while (!spi_core_data_avail(spi_master));

          report(spi_core_read_data(spi_master));

          // Deselect slaves

          spi_core_slave_select(spi_master, 0);

        }

    }

  exit(0x8000000d);

}