mos/dev/include/avr-spi.h

//  This file is part of MOS, the MANTIS Operating System
//  See http://mantis.cs.colorado.edu/
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//  Copyright (c) 2002 - 2007 University of Colorado, Boulder
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/* File: avr-spi.h
 * Author: john ledbetter (john.ledbetter@colorado.edu)
 * Desc: Seperating out AVR specific code from spi.h 
 * Date: 5/24/2007
 */

#ifndef __AVR_SPI_H__
#define __AVR_SPI_H__



#define CC2420_CHIP_SELECT_PORT B
#define CC2420_CHIP_SELECT_PIN 0
#define CC2420_CHIP_SELECT CC2420_CHIP_SELECT_PORT, CC2420_CHIP_SELECT_PIN

#define SPI_CLOCK_PORT B
#define SPI_CLOCK_PIN 1
#define SPI_CLOCK SPI_CLOCK_PORT,       SPI_CLOCK_PIN

#define SPI_MOSI_PORT B
#define SPI_MOSI_PIN 2
#define SPI_MOSI SPI_MOSI_PORT, SPI_MOSI_PIN

#define SPI_MISO_PORT B
#define SPI_MISO_PIN 3
#define SPI_MISO SPI_MISO_PORT, SPI_MISO_PIN

/* extern int spi_int_state; */


#define SPI_DISABLE_RX_INT() SPCR &= ~(1 << SPIE)
#define SPI_ENABLE_RX_INT()  spi_int_state = SPI_INT_RECV; SPCR |= (1 << SPIE)
#define SPI_DISABLE_TX_INT() SPCR &= ~(1 << SPIE)
#define SPI_ENABLE_TX_INT()  spi_int_state = SPI_INT_SEND; SPCR |= (1 << SPIE)

#define SPI_DISABLE_INT() SPI_DISABLE_RX_INT()

#define SPI_INT_SEND 0
#define SPI_INT_RECV 1

// other
#define SPI_WAIT() { while (!(SPSR & (1 << SPIF))); }
#define SPI_WAIT_EOTX() SPI_WAIT()
#define SPI_WAIT_EORX() SPI_WAIT()

#define SPI_TX_BUF SPDR
#define SPI_RX_BUF SPDR


#define PLAT_SPI_INIT() do {                    \
      init_spi_mutex_stuff();                   \
      MASK_2(SPCR, SPE, MSTR);                  \
      MASK_1(SPSR, SPI2X);                      \
   } while(0)


#endif

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