mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-23 05:25:20 +02:00
4f0af39d4d
- io.h: renamed to board.h - Makefile (OBJS): added board.o - atusb.c (reset_rf): moved to board.c - board.h (reset_rf): give reset_rf a proper declaration - atusb.c, ep.c, spi.c: include board.h instead of io.h
45 lines
664 B
C
45 lines
664 B
C
#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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void spi_begin(void)
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{
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CLR(nSS);
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}
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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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UDR1 = v;
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while (!(UCSR1A & 1 << RXC1));
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return UDR1;
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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_init(void)
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{
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OUT(SCLK);
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OUT(MOSI);
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OUT(nSS);
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IN(MISO);
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UBRR1 = 0; /* set bit rate to zero to begin */
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UCSR1C = 1 << UMSEL11 | 1 << UMSEL10;
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/* set MSPI, MSB first, SPI data mode 0 */
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UCSR1B = 1 << RXEN1 | 1 << TXEN1;
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/* enable receiver and transmitter */
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UBRR1 = 0; /* reconfirm the bit rate */
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}
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