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968721c335
Move board specific code form spi, usb and board_app into the new board specific files to avoid to many ifdefs.
52 lines
885 B
C
52 lines
885 B
C
/*
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* fw/spi.c - ATmega8 family SPI I/O
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*
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* Written 2011, 2013 by Werner Almesberger
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* Copyright 2011, 2013 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <avr/io.h>
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#include "board.h"
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#include "spi.h"
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uint8_t spi_io(uint8_t v)
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{
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// while (!(UCSR1A & 1 << UDRE1));
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SPI_DATA = v;
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SPI_WAIT_DONE();
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return SPI_DATA;
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}
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void spi_end(void)
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{
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// while (!(UCSR1A & 1 << TXC1));
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SET(nSS);
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}
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void spi_recv_block(uint8_t *buf, uint8_t n)
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{
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if (!n)
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return;
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SPI_DATA = 0;
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while (--n) {
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SPI_WAIT_DONE();
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*buf++ = SPI_DATA;
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SPI_DATA = 0;
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}
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SPI_WAIT_DONE();
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*buf++ = SPI_DATA;
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}
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