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5129029d3b
This patch adds support for the rzusbstick for the atusb firmware. More detailed information about this usb stick: http://www.atmel.com/tools/rzusbstick.aspx Original I have the rzraven kit: http://www.atmel.com/tools/rzraven.aspx Which comes with a special cable and avr dragon programmer. You need some programmer and wires to the programmers pins. To lookup how to connect the programmer to the rzusbstick pinout, see: http://www.atmel.com/Images/doc8117.pdf page 22 (schematics of the rzusbstick). Difference between atusb and rzusbstick(rzusb) is mainly the at86rf231 vs at86rf230 one. The rzusb contains the at86rf230 which is a little bit hard to deal with it (and has a huge errata inside the datasheet). Nevertheless with small schanges the atusb firmware can run now on the rzusb. The rzusb contains also a bigger mcu, so we can maybe cache more pdus for receive handling. To compile the rzusb firmware call: make NAME=rzusb this will generate the rzusb.bin then call the programmer (in my case avrdude): avrdude -P usb -c dragon_jtag -p usb1287 -U flash:w:rzusb.bin NOTE: currently there is no chance (I suppose) to ensure that the atusb receive the correct firmware, so don't try to flash the atusb with the rzusb firmware! Also the vendor and product id is the same. This currently a RFC, it's a quick hack and I think we should update more the documentation to support the rzusb. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Cc: Stefan Schmidt <stefan@osg.samsung.com> Cc: Werner Almesberger <werner@almesberger.net>
100 lines
1.5 KiB
C
100 lines
1.5 KiB
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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static bool spi_initialized = 0;
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void spi_begin(void)
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{
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if (!spi_initialized)
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spi_init();
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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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SPI_DATA = v;
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SPI_WAIT_DONE();
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return SPDR;
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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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void spi_off(void)
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{
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spi_initialized = 0;
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#ifdef ATUSB
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UCSR1B = 0;
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#endif
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#ifdef RZUSB
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SPCR &= ~(1 << SPE);
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#endif
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}
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void spi_init(void)
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{
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SET(nSS);
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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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#ifdef ATUSB
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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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#endif
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#ifdef RZUSB
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SPCR = (1 << SPE) | (1 << MSTR);
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SPSR = (1 << SPI2X);
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#endif
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spi_initialized = 1;
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}
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