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84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
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/*
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* Copyright (c) 2012-2013, Robert Olsson <robert@radio-sensors.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <avr/pgmspace.h>
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#include <avr/pgmspace.h>
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#include <avr/sleep.h>
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#include "dev/watchdog.h"
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#include "contiki.h"
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#include "i2c.h"
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#include <compat/twi.h>
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#include <stdio.h>
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#include <string.h>
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#include "enc28j60_avr.h"
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#include <util/delay_basic.h>
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#define delay_us(us) (_delay_loop_2(1 + (us * F_CPU) / 4000000UL))
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void
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enc28j60_arch_spi_init(void)
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{
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CS_SPI_DDR |= (1 << SPI_CS);
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CS_SPI_PORT |= (1 << SPI_CS);
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SPI_DDR |= (1 << SPI_MOSI) | (1 << SPI_SCK);
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SPI_DDR &= ~(1 << SPI_MISO);
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SPI_PORT &= ~(1 << SPI_MOSI);
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SPI_PORT &= ~(1 << SPI_SCK);
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SPCR = (1 << SPE) | (1 << MSTR);
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/* SPSR |= (1<<SPI2X); */
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}
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uint8_t
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enc28j60_arch_spi_write(uint8_t data)
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{
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SPDR = data;
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while(!(SPSR & (1 << SPIF))) ;
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return SPDR;
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}
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uint8_t
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enc28j60_arch_spi_read(void)
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{
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SPDR = 0xAA; /* dummy */
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while(!(SPSR & (1 << SPIF))) ;
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return SPDR;
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}
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void
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enc28j60_arch_spi_select(void)
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{
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CS_SPI_PORT &= ~(1 << SPI_CS);
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delay_us(1000);
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}
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void
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enc28j60_arch_spi_deselect(void)
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{
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CS_SPI_PORT |= (1 << SPI_CS);
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}
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