spi_drv.h

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/*H**************************************************************************
* NAME:         spi_drv.h         
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      snd1c-refd-nf-4_0_3      
* REVISION:     1.7     
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the SPI driver definition
*****************************************************************************/

#ifndef _SPI_DRV_H_
#define _SPI_DRV_H_

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


/*_____ M A C R O S ________________________________________________________*/

/*----- Modes -----*/
#define SPI_MASTER_MODE_0 (Byte)(MSK_MSTR)
#define SPI_MASTER_MODE_1 (Byte)(MSK_MSTR|0x04)
#define SPI_MASTER_MODE_2 (Byte)(MSK_MSTR|0x08)
#define SPI_MASTER_MODE_3 (Byte)(MSK_MSTR|0x0C)

#define SPI_SLAVE_MODE_0  (Byte)0x00
#define SPI_SLAVE_MODE_1  (Byte)0x04
#define SPI_SLAVE_MODE_2  (Byte)0x08
#define SPI_SLAVE_MODE_3  (Byte)0x0C

/*----- Bit rates -----*/
#define SPI_RATE_0        (Byte)0x00    /* Fper / 2 */
#define SPI_RATE_1        (Byte)0x01    /* Fper / 4 */
#define SPI_RATE_2        (Byte)0x02    /* Fper / 8 */
#define SPI_RATE_3        (Byte)0x03    /* Fper / 16 */
#define SPI_RATE_4        (Byte)0x80    /* Fper / 32 */
#define SPI_RATE_5        (Byte)0x81    /* Fper / 64 */
#define SPI_RATE_6        (Byte)0x82    /* Fper / 128 */


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


/*_____ D E C L A R A T I O N ______________________________________________*/

void    spi_set_prio (Byte);

#define Spi_enable()            (SPCON |= MSK_SPEN)
#define Spi_disable()           (SPCON &= ~MSK_SPEN)
#define Spi_enable_int()        (IEN1 |= MSK_ESPI)
#define Spi_disable_int()       (IEN1 &= ~MSK_ESPI)
#define Spi_enable_ss()         (SPCON &= ~MSK_SSDIS)
#define Spi_disable_ss()        (SPCON |= MSK_SSDIS)
#define Spi_set_mode(mode)      (SPCON &= ~(MSK_MSTR|MSK_MODE)); (SPCON |= mode)
#define Spi_set_rate(rate)      (SPCON &= ~MSK_SPR); (SPCON |= rate)
#define Spi_read_data()         (SPDAT)
#define Spi_write_data(b)       (SPDAT = b)
#define Spi_write_dummy()       (SPDAT = ACC)
#define Spi_read_dummy()        (ACC = SPDAT)
#define Spi_wait_spif()         while ((SPSTA & MSK_SPIF) == 0) /* for any SPI_RATE_x */
#define Spi_wait_eor()          while ((SPSTA & MSK_SPIF) == 0) /* wait end of reception */
#define Spi_wait_eot()          while ((SPSTA & MSK_SPIF) == 0) /* wait end of transmission */
#define Spi_eor()               ((SPSTA & MSK_SPIF) == MSK_SPIF)/* check end of reception */
#define Spi_eot()               ((SPSTA & MSK_SPIF) == MSK_SPIF)/* check end of transmission */
#define Spi_ack_read()          (ACC = SPSTA); (SPSTA = SPSTA)  /* for SPI_RATE_0 only */
#define Spi_ack_cmd()           (ACC = SPSTA); (SPSTA = SPSTA)  /* for SPI_RATE_0 only */
#define Spi_ack_write()         (SPSTA = SPSTA)                 /* for SPI_RATE_0 only */


#endif  /* _SPI_DRV_H_ */