04bbba6c12
Rename guhRF platform to osd-merkur-256, previous osd-merkur platform is now osd-merkur-128. Also check that everything is consistent. Add both platforms to the regression tests. Move redundant files in platform dev directory of both platforms to cpu/avr/dev. Note that this probably needs some rework. Already discovered some inconsistency in io definitions of both devices in the avr/io.h includes. Added a workaround in the obvious cases. The platform makefiles now set correct parameters for bootloader and for reading mac-address from flash memory. Factor the flash programming into cpu/avr and platform/osd-merkur* and rework *all* osd example makefiles to use the new settings. Also update all the flash.sh and run.sh to use the new settings. The suli ledstrip modules (and osd example) have also been removed.
291 lines
7.8 KiB
C
291 lines
7.8 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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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 Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: ds1820.c,v 1.5 2010/08/25 18:35:52 nifi Exp $
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*/
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/*
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* Device driver for the Dallas Semiconductor DS1820 chip. Heavily
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* based on the application note 126 "1-Wire Communications Through
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* Software".
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*
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* http://www.maxim-ic.com/appnotes.cfm/appnote_number/126
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*/
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/*
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* For now we stuff in Moteiv Corporation's unique OUI.
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* From http://www.ethereal.com/distribution/manuf.txt:
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* 00:12:75 Moteiv # Moteiv Corporation
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*
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* The EUI-64 is a concatenation of the 24-bit OUI value assigned by
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* the IEEE Registration Authority and a 40-bit extension identifier
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* assigned by the organization with that OUI assignment.
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*/
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#include <avr/io.h>
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#include <string.h>
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#include "contiki.h"
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#include "ds1820.h"
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unsigned char ds1820_id[8];
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unsigned char ds1820_ok[8];
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/* 1-wire is at PortE.3 */
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#define SERIAL_ID_PIN_READ PINE
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//#define SERIAL_ID_PIN_MASK _BV(PE3)
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#define SERIAL_ID_PIN_MASK _BV(PE4)
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#define SERIAL_ID_PxOUT PORTE
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#define SERIAL_ID_PxDIR DDRE
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#define SET_PIN_INPUT() (SERIAL_ID_PxDIR &= ~SERIAL_ID_PIN_MASK)
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#define SET_PIN_OUTPUT() (SERIAL_ID_PxDIR |= SERIAL_ID_PIN_MASK)
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#define OUTP_0() (SERIAL_ID_PxOUT &= ~SERIAL_ID_PIN_MASK)
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#define OUTP_1() (SERIAL_ID_PxOUT |= SERIAL_ID_PIN_MASK)
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#define PIN_INIT() do{ \
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SET_PIN_INPUT(); \
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OUTP_0(); \
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} while(0)
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/* Drive the one wire interface low */
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#define OW_DRIVE() do { \
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SET_PIN_OUTPUT(); \
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OUTP_0(); \
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} while (0)
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/* Release the one wire by turning on the internal pull-up. */
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#define OW_RELEASE() do { \
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SET_PIN_INPUT(); \
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OUTP_1(); \
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} while (0)
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/* Read one bit. */
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#define INP() (SERIAL_ID_PIN_READ & SERIAL_ID_PIN_MASK)
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/*
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* Delay times in us.
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*/
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#define tA 6 /* min-5, recommended-6, max-15 */
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#define tB 64 /* min-59, recommended-64, max-N/A */
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#define tC 60 /* min-60, recommended-60, max-120 */
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#define tD 10 /* min-5.3, recommended-10, max-N/A */
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#define tE 9 /* min-0.3, recommended-9, max-9.3 */
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#define tF 55 /* min-50, recommended-55, max-N/A */
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#define tG 0 /* min-0, recommended-0, max-0 */
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#define tH 480 /* min-480, recommended-480, max-640 */
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#define tI 70 /* min-60.3, recommended-70, max-75.3 */
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#define tJ 410 /* min-410, recommended-410, max-N/A */
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/*---------------------------------------------------------------------------*/
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#define udelay(u) clock_delay_usec(u)
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/*---------------------------------------------------------------------------*/
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static int
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owreset(void)
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{
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int result;
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OW_DRIVE();
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udelay(tH); /* 480 < tH < 640 */
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OW_RELEASE(); /* Releases the bus */
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udelay(tI);
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result = INP();
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udelay(tJ);
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return result;
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}
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/*---------------------------------------------------------------------------*/
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static void
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owwriteb(unsigned byte)
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{
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int i = 7;
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do {
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if(byte & 0x01) {
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OW_DRIVE();
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udelay(tA);
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OW_RELEASE(); /* Releases the bus */
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udelay(tB);
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} else {
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OW_DRIVE();
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udelay(tC);
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OW_RELEASE(); /* Releases the bus */
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udelay(tD);
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}
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if(i == 0) {
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return;
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}
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i--;
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byte >>= 1;
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} while(1);
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}
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/*---------------------------------------------------------------------------*/
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static unsigned
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owreadb(void)
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{
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unsigned result = 0;
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int i = 7;
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do {
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OW_DRIVE();
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udelay(tA);
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OW_RELEASE(); /* Releases the bus */
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udelay(tE);
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if (INP()){
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result |= 0x80; /* LSbit first */
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}
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udelay(tF);
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if(i == 0) {
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return result;
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}
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i--;
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result >>= 1;
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} while(1);
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}
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/*---------------------------------------------------------------------------*/
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/* Polynomial ^8 + ^5 + ^4 + 1 */
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static unsigned
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crc8_add(unsigned acc, unsigned byte)
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{
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int i;
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acc ^= byte;
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for(i = 0; i < 8; i++) {
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if(acc & 1) {
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acc = (acc >> 1) ^ 0x8c;
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} else {
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acc >>= 1;
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}
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}
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return acc;
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}
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/*---------------------------------------------------------------------------*/
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int
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ds1820_init()
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{
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int i;
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unsigned family, crc, acc;
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PIN_INIT();
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if(owreset() == 0) { /* Something pulled down 1-wire. */
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owwriteb(0x33); /* Read ROM command. */
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family = owreadb();
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/* We receive 6 bytes in the reverse order, LSbyte first. */
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for(i = 7; i >= 2; i--) {
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ds1820_id[i] = owreadb();
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}
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crc = owreadb();
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/* Verify family DS1820 and that CRC match. */
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if(family != 0x10) {
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goto fail;
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}
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acc = crc8_add(0x0, family);
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for(i = 7; i >= 2; i--) {
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acc = crc8_add(acc, ds1820_id[i]);
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}
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if(acc == crc) {
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ds1820_id[0] = 0x00;
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ds1820_id[1] = 0x00;
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ds1820_id[2] = 0x00;
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return 1; /* Success! */
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}
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} else {
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}
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fail:
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memset(ds1820_id, 0x0, sizeof(ds1820_id));
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return 0; /* Fail! */
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}
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/*---------------------------------------------------------------------------*/
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int
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ds1820_temp()
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{
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ds1820_convert();
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// wait max 750ms pin lo
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clock_wait(CLOCK_SECOND);
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ds1820_read();
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return 1;
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}
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int
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ds1820_convert()
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{
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unsigned i;
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PIN_INIT();
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for(i=0;i<3;i++){
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if(owreset() == 0) { /* Something pulled down 1-wire. */
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owwriteb(0xCC); /* Skip ROM command. */
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owwriteb(0x44); /* Convert T command. */
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OW_RELEASE(); /* Releases the bus */
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return 1;
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} else {
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}
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}
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return 0; /* Fail! */
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}
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/*---------------------------------------------------------------------------*/
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int
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ds1820_read()
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{
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int i;
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unsigned crc, acc;
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if(owreset() == 0) { /* Something pulled down 1-wire. */
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owwriteb(0xCC); /* Skip ROM command. */
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owwriteb(0xBE); /* Read Scratchpad command. */
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/* We receive 8 bytes in the reverse order, LSbyte first. */
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for(i = 0; i < 8; i++) {
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ds1820_id[i] = owreadb();
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}
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crc = owreadb();
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acc=0;
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for(i = 0; i < 8; i++) {
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acc = crc8_add(acc, ds1820_id[i]);
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}
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if(acc == crc) {
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// store temp
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for(i = 0; i < 8; i++) {
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ds1820_ok[i]=ds1820_id[i];
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}
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return 1; /* Success! */
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} else {
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return 0; /* Fail! */
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}
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} else {
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return 0; /* Fail! */
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}
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return 1; /* Fail! */
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}
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