spi_lib.c

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//_____ I N C L U D E S ____________________________________________________

#include "config.h"
#include "spi_lib.h"


//_____ D E F I N I T I O N ________________________________________________


bit spi_init_master( U8 mode, U8 rate, Bool b_msb_first )
{
   Spi_select_master();
   Spi_set_mode(mode);
   Spi_set_rate(rate);
   if( b_msb_first )
   {
      Spi_set_msbfirst();
   }else{
      Spi_set_lsbfirst();
   }
   Spi_init_bus();   
   Spi_enable();
   return TRUE;
}


bit spi_init_slave( U8 mode, U8 rate, Bool b_msb_first )
{
   Spi_select_slave();
   Spi_set_mode(mode);
   Spi_set_rate(rate);
   if( b_msb_first )
   {
      Spi_set_msbfirst();
   }else{
      Spi_set_lsbfirst();
   }
   Spi_init_bus();   
   Spi_enable();
   return TRUE;
}


char spi_putchar (char ch)
{
   Spi_write_data(ch);
   while(!Spi_tx_ready());
   return ch;
}


bit spi_test_hit (void)
{
   return Spi_rx_ready();
}


char spi_getchar (void)
{
   register char c;
   while(!Spi_rx_ready());
   c = Spi_read_data();
   return c;
}


void  spi_transmit_master(char cData)
{
   // Wait for transmission complete 
   Spi_wait_eot();
   // Start new transmission 
   Spi_write_data(cData);
}


char spi_rw(char tx)
{
   Spi_write_data(tx);
   return Spi_read_data();
}