iAudio X5: Enable reading of DS2411 serial number. See it under System|Debug|View HW info.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12723 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis
parent
04ea446edc
commit
89a38d4273
4 changed files with 290 additions and 3 deletions
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@ -81,6 +81,9 @@
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#ifdef IRIVER_H300_SERIES
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#include "pcf50606.h" /* for pcf50606_read */
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#endif
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#ifdef IAUDIO_X5
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#include "ds2411.h"
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#endif
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/*---------------------------------------------------*/
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/* SPECIAL DEBUG STUFF */
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@ -535,8 +538,9 @@ static bool dbg_hw_info(void)
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#elif CONFIG_CPU == MCF5249 || CONFIG_CPU == MCF5250
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char buf[32];
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unsigned manu, id; /* flash IDs */
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bool got_id; /* flag if we managed to get the flash IDs */
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int got_id; /* flag if we managed to get the flash IDs */
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int oldmode; /* saved memory guard mode */
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int line = 0;
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oldmode = system_memory_guard(MEMGUARD_NONE); /* disable memory guard */
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@ -551,13 +555,41 @@ static bool dbg_hw_info(void)
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lcd_setfont(FONT_SYSFIXED);
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lcd_clear_display();
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lcd_puts(0, 0, "[Hardware info]");
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lcd_puts(0, line++, "[Hardware info]");
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if (got_id)
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snprintf(buf, 32, "Flash: M=%04x D=%04x", manu, id);
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else
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snprintf(buf, 32, "Flash: M=???? D=????"); /* unknown, sorry */
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lcd_puts(0, 1, buf);
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lcd_puts(0, line++, buf);
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#ifdef IAUDIO_X5
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{
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struct ds2411_id id;
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line++;
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lcd_puts(0, line++, "Serial Number:");
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got_id = ds2411_read_id(&id);
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if (got_id == DS2411_OK)
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{
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snprintf(buf, 32, " FC=%02x", (unsigned)id.family_code);
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lcd_puts(0, line++, buf);
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snprintf(buf, 32, " ID=%02X %02X %02X %02X %02X %02X",
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(unsigned)id.uid[0], (unsigned)id.uid[1], (unsigned)id.uid[2],
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(unsigned)id.uid[3], (unsigned)id.uid[4], (unsigned)id.uid[5]);
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lcd_puts(0, line++, buf);
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snprintf(buf, 32, " CRC=%02X", (unsigned)id.crc);
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lcd_puts(0, line++, buf);
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}
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else
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{
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snprintf(buf, 32, "READ ERR=%d", got_id);
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lcd_puts(0, line++, buf);
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}
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}
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#endif
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lcd_update();
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@ -364,6 +364,7 @@ target/coldfire/iaudio/system-iaudio.c
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target/coldfire/iaudio/usb-iaudio.c
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target/coldfire/iaudio/x5/backlight-x5.c
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target/coldfire/iaudio/x5/button-x5.c
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target/coldfire/iaudio/x5/ds2411-x5.c
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target/coldfire/iaudio/x5/lcd-as-x5.S
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target/coldfire/iaudio/x5/lcd-x5.c
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target/coldfire/iaudio/x5/m5636-x5.c
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48
firmware/export/ds2411.h
Normal file
48
firmware/export/ds2411.h
Normal file
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@ -0,0 +1,48 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Michael Sevakis
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _DS2411_H_
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#define _DS2411_H_
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#include <stdbool.h>
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/*
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* Byte 0: 8-bit family code (always 01h)
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* Bytes 1-6: 48-bit serial number
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* Byte 7: 8-bit CRC code
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*/
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struct ds2411_id
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{
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unsigned char family_code;
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unsigned char uid[6];
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unsigned char crc;
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} __attribute__((packed));
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extern int ds2411_read_id(struct ds2411_id *id);
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/* return values */
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enum ds2411_id_return_codes
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{
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DS2411_NO_PRESENCE = -3,
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DS2411_INVALID_FAMILY_CODE,
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DS2411_INVALID_CRC,
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DS2411_OK = 0,
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};
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#endif /* _DS2411_H_ */
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206
firmware/target/coldfire/iaudio/x5/ds2411-x5.c
Normal file
206
firmware/target/coldfire/iaudio/x5/ds2411-x5.c
Normal file
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@ -0,0 +1,206 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Michael Sevakis
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "cpu.h"
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#include "ds2411.h"
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#include "logf.h"
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/* Delay factor that depends on CPU frequency */
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static unsigned int ds2411_delay_factor = 0;
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#define DS2411_BIT (1 << 22)
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/* Delay the specified number of microseconds - plus a tiny bit */
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#define DELAY(uS) \
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asm volatile( \
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"move.l %[x], %%d0 \n" \
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"mulu.l %[factor], %%d0 \n" \
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"1: \n" \
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"subq.l #1, %%d0 \n" \
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"bhi.s 1b \n" \
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: : [factor]"d"(ds2411_delay_factor), [x]"d"(uS) : "d0");
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/* Calculate the CRC of a byte */
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static unsigned char ds2411_calc_crc(unsigned char byte)
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{
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/* POLYNOMIAL = X^8 + X^5 + X^4 + 1 */
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static const unsigned char eor[8] =
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{
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0x5e, /* 01011110 */
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0xbc, /* 10111100 */
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0x61, /* 01100001 */
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0xc2, /* 11000010 */
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0x9d, /* 10011101 */
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0x23, /* 00100011 */
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0x46, /* 01000110 */
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0x8c, /* 10001100 */
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};
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unsigned char crc = 0;
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int i = 0;
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do
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{
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if (byte & (1 << i))
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crc ^= eor[i];
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}
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while (++i < 8);
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return crc;
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} /* ds2411_calc_crc */
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/* Write a byte to the DS2411 - LSb first */
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static void ds2411_write_byte(unsigned char data)
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{
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int i = 0;
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do
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{
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if (data & 0x01)
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{
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/* Write a "1": Hold line low, then leave line pulled up and wait
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out the remainder of Tslot */
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or_l(DS2411_BIT, &GPIO_ENABLE);
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DELAY(6);
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and_l(~DS2411_BIT, &GPIO_ENABLE);
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DELAY(60);
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}
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else
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{
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/* Write a "0": Hold line low, then leave line pulled up and wait
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out the remainder of Tslot which is just Trec */
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or_l(DS2411_BIT, &GPIO_ENABLE);
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DELAY(60);
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and_l(~DS2411_BIT, &GPIO_ENABLE);
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DELAY(6);
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}
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data >>= 1;
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}
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while (++i < 8);
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} /* ds2411_write_byte */
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/* Read a byte from the DS2411 - LSb first */
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static unsigned char ds2411_read_byte(void)
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{
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int i = 0;
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unsigned data = 0;
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do
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{
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/* Hold line low to begin bit read: Tf + Trl */
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or_l(DS2411_BIT, &GPIO_ENABLE);
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DELAY(6);
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/* Set line high and delay before sampling within the master
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sampling window: Tmsr - max 15us from Trl start */
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and_l(~DS2411_BIT, &GPIO_ENABLE);
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DELAY(9);
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/* Sample data line */
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if ((GPIO_READ & DS2411_BIT) != 0)
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data |= 1 << i;
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/* Wait out the remainder of Tslot */
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DELAY(60);
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}
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while (++i < 8);
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return data;
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} /* ds2411_read_byte */
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/*
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* Byte 0: 8-bit family code (01h)
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* Bytes 1-6: 48-bit serial number
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* Byte 7: 8-bit CRC code
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*/
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int ds2411_read_id(struct ds2411_id *id)
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{
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int i;
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unsigned char crc;
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/* Initialize delay factor based on loop time: 3*(uS-1) + 3 */
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ds2411_delay_factor = MIN(cpu_frequency / (1000000*3), 1);
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/* Init GPIO 1 wire bus for bit banging with a pullup resistor where
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* it is set low as output and switched between input and output mode.
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* Required for bidirectional communication on a single wire.
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*/
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or_l(DS2411_BIT, &GPIO_FUNCTION); /* Set pin as GPIO */
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and_l(~DS2411_BIT, &GPIO_ENABLE); /* Set as input */
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and_l(~DS2411_BIT, &GPIO_OUT); /* Set low when set as output */
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/* Delay 100us to stabilize */
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DELAY(100);
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/* Issue reset pulse - 480uS or more to ensure standard (not overdrive)
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mode - we don't have the timing accuracy for that. */
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or_l(DS2411_BIT, &GPIO_ENABLE);
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/* Delay 560us: (Trstlmin + Trstlmax) / 2*/
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DELAY(560);
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and_l(~DS2411_BIT, &GPIO_ENABLE);
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/* Delay 66us: Tpdhmax + 6 */
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DELAY(66);
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/* Read presence pulse - line should be pulled low at proper time by the
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slave device */
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if (GPIO_READ & DS2411_BIT)
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{
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logf("ds2411: no presence pulse");
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return DS2411_NO_PRESENCE;
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}
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/* Trsth + 1 - 66 = Tpdhmax + Tpdlmax + Trecmin + 1 - 66 */
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DELAY(240);
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/* ds2411 should be ready for data transfer */
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/* Send Read ROM command */
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ds2411_write_byte(0x33);
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/* Read ROM serial number and CRC */
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i = 0, crc = 0;
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do
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{
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unsigned char byte = ds2411_read_byte();
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((unsigned char *)id)[i] = byte;
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crc = ds2411_calc_crc(crc ^ byte);
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}
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while (++i < 8);
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/* Check that family code is ok */
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if (id->family_code != 0x01)
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{
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logf("ds2411: invalid family code=%02X", (unsigned)id->family_code);
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return DS2411_INVALID_FAMILY_CODE;
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}
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/* Check that CRC was ok */
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if (crc != 0) /* Because last loop eors the CRC with the resulting CRC */
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{
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logf("ds2411: invalid CRC=%02X", (unsigned)id->crc);
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return DS2411_INVALID_CRC;
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}
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/* Good ID read */
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return DS2411_OK;
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} /* ds2411_read_id */
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