fast-SPI.h

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/******************************************************************/
#ifndef __FAST_SPI_H__
#define __FAST_SPI_H__
 
#define NOP             __asm__ volatile \
                        ("nop            'delay 50ns" \
                        : /* no outputs */ \
                        : /* no inputs */ )   
 
#define t_NONE                                
#define t_FAST          ; NOP                 
#define t_SLOW          ; NOP; NOP; NOP       
 
#define tSCLK           t_NONE                
#define tCLQV           t_NONE                
#define tDSU            t_NONE                
#define tCSL            t_NONE                
 
#define tCSH            ; NOP; NOP            
#define tSHWL           ; NOP; NOP            
#define tWHSL           ; NOP; NOP            
#define tHHQX           ; NOP                 
#define tHLQZ           ; NOP                 
 
#define CHIP_ON         __asm__ volatile \
                        ("or dira, %0    'activate output, CE# goes low" \
                        : /* no outputs */ \
                        : "i" (CEn_AVAIL)) \
                        tCSL
 
#define CHIP_OFF        __asm__ volatile \
                        ("andn dira, %0  'tristate, CE# goes high via pull-up" \
                        : /* no outputs */ \
                        : "i" (CEn_AVAIL)) \
                        tCSH
 
#define WPn_HIGH        __asm__ volatile \
                        ("or outa, %0    'WP# high" \
                        : /* no outputs */ \
                        : "i" (BIT_WPn)) \
                        tWHSL
 
#define WPn_LOW         __asm__ volatile \
                        ("andn outa, %0  'WP# low" \
                        : /* no outputs */ \
                        : "i" (BIT_WPn)) \
                        tSHWL
 
#define CLOCK_HIGH      __asm__ volatile \
                        ("or outa, %0    'clock high" \
                        : /* no outputs */ \
                        : "i" (SCLK_AVAIL)) \
                        tSCLK
 
#define CLOCK_LOW       __asm__ volatile \
                        ("andn outa, %0  'clock low" \
                        : /* no outputs */ \
                        : "i" (SCLK_AVAIL)) \
                        tSCLK
 
#define SO_HIGH         __asm__ volatile \
                        ("or outa, %0    'SO high" \
                        : /* no outputs */ \
                        : "i" (BIT_MOSI)) \
                        tDSU
 
#define SO_LOW          __asm__ volatile \
                        ("andn outa, %0  'SO low" \
                        : /* no outputs */ \
                        : "i" (BIT_MOSI)) \
                        tDSU
 
/*
#define HOLDn_HIGH      __asm__ volatile \
                        ("or outa, %0    'HOLD# high" \
                        : \
                        : "i" (BIT_HOLDn)) \
                        tHLQZ
 
#define HOLDn_LOW       __asm__ volatile \
                        ("andn outa, %0  'HOLD# low" \
                        : \
                        : "i" (BIT_HOLDn)) \
                        tHHQX
*/
#define HOLDn_HIGH      OUTA |= BIT_HOLDn \
                        tHLQZ
 
#define HOLDn_LOW       OUTA &= ~BIT_HOLDn \
                        tHHQX
 
 
#endif
/* __FAST_SPI_H__ */