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ben-wpan/atusb/fw/spi.h
Werner Almesberger 7fd9044d94 atusb/fw/: add SPI block reception
This decreases the retrieval time for a frame of 102 bytes from
660 us to 384 us, corresponding to a speed change from about
1.26 Mbps to 2.17 Mbps (102 bytes plus 2 bytes overhead).
2013-07-30 19:52:54 -03:00

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C

/*
* fw/spi.h - ATmega8 family SPI I/O
*
* Written 2011, 2013 by Werner Almesberger
* Copyright 2011, 2013 Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef SPI_H
#define SPI_H
#include <stdint.h>
void spi_begin(void);
uint8_t spi_io(uint8_t v);
void spi_end(void);
void spi_off(void);
void spi_init(void);
#define spi_send(v) (void) spi_io(v)
#define spi_recv(v) spi_io(0)
void spi_recv_block(uint8_t *buf, uint8_t n);
#endif /* !SPI_H */