spi.h

我制作过的usbisp资料, 仅供参考

/**
	Autor: Matthias Wei遝r<br>
	Copyright 2004: Matthias Wei遝r<br>
	License: QPL (see license.txt)
*/

#ifndef __SPI_H
#define __SPI_H

#define SPI_SPEED_4MHZ		0
#define SPI_SPEED_2MHZ		1
#define SPI_SPEED_1MHZ		2	
#define SPI_SPEED_500KHZ	3
#define SPI_SPEED_250KHZ	4
#define SPI_SPEED_125KHZ	5
#define SPI_SPEED_62KHZ		6

#define SPI_SPEED_HIGH		0
#define SPI_SPEED_LOW		6

void spi_enable(void);
void spi_disable(void);
void spi_reset(void);
void spi_set_speed(unsigned char s);
void spi_clock_pulse(void);
unsigned char spi_transfer_8(unsigned char d);
unsigned char spi_transfer_16(unsigned int d);
unsigned char spi_transfer_32(unsigned long d);


#endif