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Adding the avr-rss2 platform based on AtMega256RFR2

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Robert Olsson 2016-02-22 20:46:07 +01:00
parent d3980668ee
commit ce8e87d60e
91 changed files with 9349 additions and 0 deletions
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platform/avr-rss2/dev/enc28j60_avr.c Normal file
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/*
* Copyright (c) 2012-2013, Robert Olsson <robert@radio-sensors.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <avr/pgmspace.h>
#include <avr/pgmspace.h>
#include <avr/sleep.h>
#include "dev/watchdog.h"
#include "contiki.h"
#include "i2c.h"
#include <compat/twi.h>
#include <stdio.h>
#include <string.h>
#include "enc28j60_avr.h"
#include <util/delay_basic.h>
#define delay_us(us) (_delay_loop_2(1 + (us * F_CPU) / 4000000UL))
void
enc28j60_arch_spi_init(void)
{
CS_SPI_DDR |= (1 << SPI_CS);
CS_SPI_PORT |= (1 << SPI_CS);
SPI_DDR |= (1 << SPI_MOSI) | (1 << SPI_SCK);
SPI_DDR &= ~(1 << SPI_MISO);
SPI_PORT &= ~(1 << SPI_MOSI);
SPI_PORT &= ~(1 << SPI_SCK);
SPCR = (1 << SPE) | (1 << MSTR);
/* SPSR |= (1<<SPI2X); */
}
uint8_t
enc28j60_arch_spi_write(uint8_t data)
{
SPDR = data;
while(!(SPSR & (1 << SPIF))) ;
return SPDR;
}
uint8_t
enc28j60_arch_spi_read(void)
{
SPDR = 0xAA; /* dummy */
while(!(SPSR & (1 << SPIF))) ;
return SPDR;
}
void
enc28j60_arch_spi_select(void)
{
CS_SPI_PORT &= ~(1 << SPI_CS);
delay_us(1000);
}
void
enc28j60_arch_spi_deselect(void)
{
CS_SPI_PORT |= (1 << SPI_CS);
}