OneWireEEPROM -

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OneWireEEPROM.cpp@0:0f7bbfde44b7, 2011-03-21 (annotated)

Committer:: Wimpie
Date:: Mon Mar 21 20:33:46 2011 +0000
Revision:: 0:0f7bbfde44b7
Child:: 1:7218c076189b

Who changed what in which revision?

User	Revision	Line number	New contents of line
Wimpie	0:0f7bbfde44b7	1	/*
Wimpie	0:0f7bbfde44b7	2	* OneWireEEPROM. Library for Maxim One-Wire EEPROM.
Wimpie	0:0f7bbfde44b7	3	*
Wimpie	0:0f7bbfde44b7	4	* see http://www.maxim-ic.com
Wimpie	0:0f7bbfde44b7	5	*
Wimpie	0:0f7bbfde44b7	6	* DS2433
Wimpie	0:0f7bbfde44b7	7	* DS28EC20
Wimpie	0:0f7bbfde44b7	8	*
Wimpie	0:0f7bbfde44b7	9	* Copyright (C) <2011> Wim De Roeve <wim312@gmail.com>
Wimpie	0:0f7bbfde44b7	10	*
Wimpie	0:0f7bbfde44b7	11	* Uses the OneWireCRC library. http://mbed.org/users/snatch59/programs/OneWireCRC/gpdz56
Wimpie	0:0f7bbfde44b7	12	*
Wimpie	0:0f7bbfde44b7	13	* OneWireEEPROM is free software: you can redistribute it and/or modify
Wimpie	0:0f7bbfde44b7	14	* it under the terms of the GNU General Public License as published by
Wimpie	0:0f7bbfde44b7	15	* the Free Software Foundation, either version 3 of the License, or
Wimpie	0:0f7bbfde44b7	16	* (at your option) any later version.
Wimpie	0:0f7bbfde44b7	17	*
Wimpie	0:0f7bbfde44b7	18	* OneWireEEPROM is distributed in the hope that it will be useful,
Wimpie	0:0f7bbfde44b7	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
Wimpie	0:0f7bbfde44b7	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Wimpie	0:0f7bbfde44b7	21	* GNU General Public License for more details.
Wimpie	0:0f7bbfde44b7	22	*
Wimpie	0:0f7bbfde44b7	23	* You should have received a copy of the GNU General Public License
Wimpie	0:0f7bbfde44b7	24	* If not, see <http://www.gnu.org/licenses/>.
Wimpie	0:0f7bbfde44b7	25	*/
Wimpie	0:0f7bbfde44b7	26
Wimpie	0:0f7bbfde44b7	27	#include "mbed.h"
Wimpie	0:0f7bbfde44b7	28	#include "OneWireEEPROM.h"
Wimpie	0:0f7bbfde44b7	29
Wimpie	0:0f7bbfde44b7	30	Serial output(USBTX, USBRX);
Wimpie	0:0f7bbfde44b7	31
Wimpie	0:0f7bbfde44b7	32	OneWireEEPROM::OneWireEEPROM(PinName pin, bool crcOn, bool useAddr, bool parasitic, DSTYPE ds)
Wimpie	0:0f7bbfde44b7	33	:oneWire(pin, STANDARD) {
Wimpie	0:0f7bbfde44b7	34	_useCRC=crcOn;
Wimpie	0:0f7bbfde44b7	35	_useAddress=useAddr;
Wimpie	0:0f7bbfde44b7	36	_useParasiticPower=parasitic;
Wimpie	0:0f7bbfde44b7	37	switch (ds) {
Wimpie	0:0f7bbfde44b7	38	case DS2433: {
Wimpie	0:0f7bbfde44b7	39	_pages = DS2433PAGES;
Wimpie	0:0f7bbfde44b7	40	_eeprom_id =DS2433EEPROM_ID;
Wimpie	0:0f7bbfde44b7	41	break;
Wimpie	0:0f7bbfde44b7	42	}
Wimpie	0:0f7bbfde44b7	43	case DS28EC20: {
Wimpie	0:0f7bbfde44b7	44	_pages =DS28EC20PAGES;
Wimpie	0:0f7bbfde44b7	45	_eeprom_id =DS28EC20EEPROM_ID;
Wimpie	0:0f7bbfde44b7	46	break;
Wimpie	0:0f7bbfde44b7	47	}
Wimpie	0:0f7bbfde44b7	48
Wimpie	0:0f7bbfde44b7	49	}
Wimpie	0:0f7bbfde44b7	50	_memsize = _pages * PAGESIZE;
Wimpie	0:0f7bbfde44b7	51	}
Wimpie	0:0f7bbfde44b7	52
Wimpie	0:0f7bbfde44b7	53
Wimpie	0:0f7bbfde44b7	54	bool OneWireEEPROM::Initialize(uint8_t* ROMaddress) {
Wimpie	0:0f7bbfde44b7	55
Wimpie	0:0f7bbfde44b7	56	active=false;
Wimpie	0:0f7bbfde44b7	57
Wimpie	0:0f7bbfde44b7	58	output.printf("\r\nScan for One-Wire devices\r\n");
Wimpie	0:0f7bbfde44b7	59
Wimpie	0:0f7bbfde44b7	60	oneWire.resetSearch();
Wimpie	0:0f7bbfde44b7	61	if (!oneWire.search(oneWire.ROMCode)) { // search for 1-wire device with address
Wimpie	0:0f7bbfde44b7	62	// pc_OneWireEEPROM.traceOut("No One-Wire Device found.\r\n");
Wimpie	0:0f7bbfde44b7	63	wait_ms(100);
Wimpie	0:0f7bbfde44b7	64	return false;
Wimpie	0:0f7bbfde44b7	65	}
Wimpie	0:0f7bbfde44b7	66
Wimpie	0:0f7bbfde44b7	67	output.printf("Address = ");
Wimpie	0:0f7bbfde44b7	68	for (int i = 0; i < ADDRESS_SIZE; i++) {
Wimpie	0:0f7bbfde44b7	69	output.printf("%x ", (int)oneWire.ROMCode[i]);
Wimpie	0:0f7bbfde44b7	70	}
Wimpie	0:0f7bbfde44b7	71
Wimpie	0:0f7bbfde44b7	72	output.printf("\r\n");
Wimpie	0:0f7bbfde44b7	73
Wimpie	0:0f7bbfde44b7	74	if (OneWireCRC::crc8(oneWire.ROMCode, ADDRESS_CRC_BYTE) != oneWire.ROMCode[ADDRESS_CRC_BYTE]) { // check address CRC is valid
Wimpie	0:0f7bbfde44b7	75	output.printf("CRC is not valid!\r\n");
Wimpie	0:0f7bbfde44b7	76	wait_ms(100);
Wimpie	0:0f7bbfde44b7	77
Wimpie	0:0f7bbfde44b7	78	return false;
Wimpie	0:0f7bbfde44b7	79	}
Wimpie	0:0f7bbfde44b7	80
Wimpie	0:0f7bbfde44b7	81	if (oneWire.ROMCode[0] != _eeprom_id) {
Wimpie	0:0f7bbfde44b7	82	output.printf("Device is not a OneWireEEPROM_ID device.\r\n");
Wimpie	0:0f7bbfde44b7	83	wait_ms(100);
Wimpie	0:0f7bbfde44b7	84	return false;
Wimpie	0:0f7bbfde44b7	85	}
Wimpie	0:0f7bbfde44b7	86
Wimpie	0:0f7bbfde44b7	87	if (_useAddress) {
Wimpie	0:0f7bbfde44b7	88	bool wrong=false;
Wimpie	0:0f7bbfde44b7	89	for (int i = 0; i < ADDRESS_SIZE; i++) {
Wimpie	0:0f7bbfde44b7	90	if (oneWire.ROMCode[i]!=ROMaddress[i])
Wimpie	0:0f7bbfde44b7	91	wrong=true;
Wimpie	0:0f7bbfde44b7	92
Wimpie	0:0f7bbfde44b7	93	if (!wrong) {
Wimpie	0:0f7bbfde44b7	94	output.printf("OneWireEEPROM present and correct.\r\n");
Wimpie	0:0f7bbfde44b7	95	active=true;
Wimpie	0:0f7bbfde44b7	96	return true;
Wimpie	0:0f7bbfde44b7	97	} else {
Wimpie	0:0f7bbfde44b7	98	output.printf("other OneWireEEPROM found\r\n");
Wimpie	0:0f7bbfde44b7	99	return false;
Wimpie	0:0f7bbfde44b7	100	}
Wimpie	0:0f7bbfde44b7	101	}
Wimpie	0:0f7bbfde44b7	102	} else {
Wimpie	0:0f7bbfde44b7	103	active=true;
Wimpie	0:0f7bbfde44b7	104	return true;
Wimpie	0:0f7bbfde44b7	105	}
Wimpie	0:0f7bbfde44b7	106	return false;
Wimpie	0:0f7bbfde44b7	107	}
Wimpie	0:0f7bbfde44b7	108
Wimpie	0:0f7bbfde44b7	109	void OneWireEEPROM::ResetAndAddress() {
Wimpie	0:0f7bbfde44b7	110	oneWire.reset(); // reset device
Wimpie	0:0f7bbfde44b7	111	if (_useAddress) {
Wimpie	0:0f7bbfde44b7	112	oneWire.matchROM(ROMCode); // select which device to talk to
Wimpie	0:0f7bbfde44b7	113	} else {
Wimpie	0:0f7bbfde44b7	114	oneWire.skipROM(); // broadcast
Wimpie	0:0f7bbfde44b7	115	}
Wimpie	0:0f7bbfde44b7	116	}
Wimpie	0:0f7bbfde44b7	117
Wimpie	0:0f7bbfde44b7	118	bool OneWireEEPROM::WriteMemory(uint8_t* Source, uint16_t Address, uint8_t Size) {
Wimpie	0:0f7bbfde44b7	119	uint8_t _ES; //store Endif Address , datastatus
Wimpie	0:0f7bbfde44b7	120	uint8_t B;
Wimpie	0:0f7bbfde44b7	121
Wimpie	0:0f7bbfde44b7	122	if (Address<_memsize) {
Wimpie	0:0f7bbfde44b7	123	uint8_t _TA1=(uint8_t)(Address & 0x00FF);
Wimpie	0:0f7bbfde44b7	124	uint8_t _TA2=(uint8_t)((Address & 0xFF00)>>8);
Wimpie	0:0f7bbfde44b7	125
Wimpie	0:0f7bbfde44b7	126	if ((Size<=PAGESIZE) and ((Size+Address)<=_memsize)) {
Wimpie	0:0f7bbfde44b7	127
Wimpie	0:0f7bbfde44b7	128	output.printf ("\r\nWriting to OneWireEEPROM %i Bytes",Size);
Wimpie	0:0f7bbfde44b7	129
Wimpie	0:0f7bbfde44b7	130	ResetAndAddress();
Wimpie	0:0f7bbfde44b7	131	oneWire.writeByte(WRITESCRATCHPAD);
Wimpie	0:0f7bbfde44b7	132	oneWire.writeByte(_TA1); //begin address T7..T0
Wimpie	0:0f7bbfde44b7	133	oneWire.writeByte(_TA2); //begin address T15..T8
Wimpie	0:0f7bbfde44b7	134
Wimpie	0:0f7bbfde44b7	135	//write _memPage to scratchpad
Wimpie	0:0f7bbfde44b7	136
Wimpie	0:0f7bbfde44b7	137	for (int i = 0; i < Size; i++) {
Wimpie	0:0f7bbfde44b7	138	oneWire.writeByte(Source[i]);
Wimpie	0:0f7bbfde44b7	139	// pc_OneWireEEPROM.traceOut ("%X ",Source[i]);
Wimpie	0:0f7bbfde44b7	140	}
Wimpie	0:0f7bbfde44b7	141	// pc_OneWireEEPROM.traceOut ("\r\nTA1=%X",_TA1);
Wimpie	0:0f7bbfde44b7	142	// pc_OneWireEEPROM.traceOut ("\r\nTA2=%X\r\n",_TA2);
Wimpie	0:0f7bbfde44b7	143
Wimpie	0:0f7bbfde44b7	144	//read and check data in scratchpad
Wimpie	0:0f7bbfde44b7	145	ResetAndAddress();
Wimpie	0:0f7bbfde44b7	146	oneWire.writeByte(READSCRATCHPAD);
Wimpie	0:0f7bbfde44b7	147	B=oneWire.readByte();
Wimpie	0:0f7bbfde44b7	148	if (B != _TA1) { //check TA1, return if bad
Wimpie	0:0f7bbfde44b7	149	output.printf("\r\nWrite error in TA1 %X - %X\r\n",B,_TA1);
Wimpie	0:0f7bbfde44b7	150	return false;
Wimpie	0:0f7bbfde44b7	151	}
Wimpie	0:0f7bbfde44b7	152	B=oneWire.readByte();
Wimpie	0:0f7bbfde44b7	153	if (B != _TA2) { //check TA2, return if bad
Wimpie	0:0f7bbfde44b7	154	output.printf("\r\nWrite error in TA2 %X - %X\r\n",B,_TA2);
Wimpie	0:0f7bbfde44b7	155	return false;
Wimpie	0:0f7bbfde44b7	156	}
Wimpie	0:0f7bbfde44b7	157	_ES = oneWire.readByte(); // ES Register
Wimpie	0:0f7bbfde44b7	158
Wimpie	0:0f7bbfde44b7	159	//check data written
Wimpie	0:0f7bbfde44b7	160	for (int i = 0; i < Size; i++) {
Wimpie	0:0f7bbfde44b7	161	B=oneWire.readByte();
Wimpie	0:0f7bbfde44b7	162	if (B != Source[i]) { //return if bad
Wimpie	0:0f7bbfde44b7	163	output.printf("\r\nWrite error in scratchpad on %i %X<->%X\r\n",i,B ,Source[i]);
Wimpie	0:0f7bbfde44b7	164	return false;
Wimpie	0:0f7bbfde44b7	165	}
Wimpie	0:0f7bbfde44b7	166	}
Wimpie	0:0f7bbfde44b7	167
Wimpie	0:0f7bbfde44b7	168	output.printf("\r\nES=%X\r\n",_ES);
Wimpie	0:0f7bbfde44b7	169
Wimpie	0:0f7bbfde44b7	170	//issue copy with auth data
Wimpie	0:0f7bbfde44b7	171	wait_ms(10);
Wimpie	0:0f7bbfde44b7	172	ResetAndAddress();
Wimpie	0:0f7bbfde44b7	173	oneWire.writeByte(COPYSCRATCHPAD);
Wimpie	0:0f7bbfde44b7	174	oneWire.writeByte(_TA1);
Wimpie	0:0f7bbfde44b7	175	oneWire.writeByte(_TA2);
Wimpie	0:0f7bbfde44b7	176	oneWire.writeByte(_ES); //pull-up!
Wimpie	0:0f7bbfde44b7	177	wait_ms(10); //10ms min strong pullup delay -> time needed to copy from scratchpad to memory
Wimpie	0:0f7bbfde44b7	178
Wimpie	0:0f7bbfde44b7	179	oneWire.reset();
Wimpie	0:0f7bbfde44b7	180
Wimpie	0:0f7bbfde44b7	181	output.printf ("\r\nData written\r\n");
Wimpie	0:0f7bbfde44b7	182	return true;
Wimpie	0:0f7bbfde44b7	183	} else {
Wimpie	0:0f7bbfde44b7	184	output.printf ("\r\nTrying to write more then %i bytes-> %i\r\n",PAGESIZE,Size);
Wimpie	0:0f7bbfde44b7	185	return false;
Wimpie	0:0f7bbfde44b7	186	}
Wimpie	0:0f7bbfde44b7	187	} else {
Wimpie	0:0f7bbfde44b7	188	output.printf ("\r\nAddress %X not available, EEPROM isn't that bigg..-> %i\r\n",Address);
Wimpie	0:0f7bbfde44b7	189	return false;
Wimpie	0:0f7bbfde44b7	190	}
Wimpie	0:0f7bbfde44b7	191	}
Wimpie	0:0f7bbfde44b7	192
Wimpie	0:0f7bbfde44b7	193
Wimpie	0:0f7bbfde44b7	194	int OneWireEEPROM::ReadMemory(uint8_t* Destination, uint16_t Address, uint16_t Size) {
Wimpie	0:0f7bbfde44b7	195	uint8_t tmpReader;
Wimpie	0:0f7bbfde44b7	196	bool readFF = 0;
Wimpie	0:0f7bbfde44b7	197	int memPtr;
Wimpie	0:0f7bbfde44b7	198
Wimpie	0:0f7bbfde44b7	199	if (Address<_memsize) {
Wimpie	0:0f7bbfde44b7	200
Wimpie	0:0f7bbfde44b7	201	uint8_t _TA1=(uint8_t)(Address & 0x00FF);
Wimpie	0:0f7bbfde44b7	202	uint8_t _TA2=(uint8_t)((Address & 0xFF00)>>8);
Wimpie	0:0f7bbfde44b7	203
Wimpie	0:0f7bbfde44b7	204	if ((Size+Address)<=_memsize) {
Wimpie	0:0f7bbfde44b7	205
Wimpie	0:0f7bbfde44b7	206	ResetAndAddress();
Wimpie	0:0f7bbfde44b7	207	oneWire.writeByte(READMEMORY);
Wimpie	0:0f7bbfde44b7	208	oneWire.writeByte(_TA1);
Wimpie	0:0f7bbfde44b7	209	oneWire.writeByte(_TA2);
Wimpie	0:0f7bbfde44b7	210
Wimpie	0:0f7bbfde44b7	211	output.printf ("\r\nReading... TA1=%X TA2=%X",_TA1, _TA2);
Wimpie	0:0f7bbfde44b7	212
Wimpie	0:0f7bbfde44b7	213	for (memPtr = 0; memPtr < Size; memPtr++) {
Wimpie	0:0f7bbfde44b7	214	tmpReader = oneWire.readByte();
Wimpie	0:0f7bbfde44b7	215	if (tmpReader == 0xff & !readFF)
Wimpie	0:0f7bbfde44b7	216	readFF = 1;
Wimpie	0:0f7bbfde44b7	217	else if (tmpReader == 0xff & readFF)
Wimpie	0:0f7bbfde44b7	218	// 0xff read twice, hopefully EoF as we break here :)
Wimpie	0:0f7bbfde44b7	219	break;
Wimpie	0:0f7bbfde44b7	220
Wimpie	0:0f7bbfde44b7	221	Destination[memPtr] = tmpReader;
Wimpie	0:0f7bbfde44b7	222	}
Wimpie	0:0f7bbfde44b7	223	output.printf ("-> %i byte(s)\r\n",memPtr);
Wimpie	0:0f7bbfde44b7	224	return memPtr;
Wimpie	0:0f7bbfde44b7	225
Wimpie	0:0f7bbfde44b7	226	} else {
Wimpie	0:0f7bbfde44b7	227	output.printf ("\r\nTrying to read outside MEMORY -> %i\r\n",Address+Size);
Wimpie	0:0f7bbfde44b7	228	return 0;
Wimpie	0:0f7bbfde44b7	229	}
Wimpie	0:0f7bbfde44b7	230	} else {
Wimpie	0:0f7bbfde44b7	231	output.printf ("\r\nAddress %X not available, EEPROM isn't that bigg..-> %i\r\n",Address);
Wimpie	0:0f7bbfde44b7	232	return 0;
Wimpie	0:0f7bbfde44b7	233	}
Wimpie	0:0f7bbfde44b7	234	}
Wimpie	0:0f7bbfde44b7	235
Wimpie	0:0f7bbfde44b7	236	void OneWireEEPROM::ShowMemory(int PageFrom, int PageTo) {
Wimpie	0:0f7bbfde44b7	237	int Size;
Wimpie	0:0f7bbfde44b7	238	if ((PageFrom>=0) and (PageFrom<_pages) and
Wimpie	0:0f7bbfde44b7	239	(PageTo>=0) and (PageTo<_pages)) {
Wimpie	0:0f7bbfde44b7	240
Wimpie	0:0f7bbfde44b7	241	uint8_t MemAll = (uint8_t) malloc(_memsize);
Wimpie	0:0f7bbfde44b7	242
Wimpie	0:0f7bbfde44b7	243	output.printf ("\r\nRead Page(s) from EEPROM\r\n");
Wimpie	0:0f7bbfde44b7	244
Wimpie	0:0f7bbfde44b7	245	Size=ReadMemory(MemAll,0x0000,_memsize);
Wimpie	0:0f7bbfde44b7	246
Wimpie	0:0f7bbfde44b7	247	for (int j=PageFrom;j<=PageTo;j++) {
Wimpie	0:0f7bbfde44b7	248	output.printf ("\r\nPage %2i ->",j);
Wimpie	0:0f7bbfde44b7	249	for (int i=0;i<PAGESIZE;i++) {
Wimpie	0:0f7bbfde44b7	250	if ((j*32+i)<= Size)
Wimpie	0:0f7bbfde44b7	251	output.printf("%2X ",MemAll[j*32+i]);
Wimpie	0:0f7bbfde44b7	252	}
Wimpie	0:0f7bbfde44b7	253	if ((j*32)>Size)
Wimpie	0:0f7bbfde44b7	254	break;
Wimpie	0:0f7bbfde44b7	255	}
Wimpie	0:0f7bbfde44b7	256	output.printf ("\r\n");
Wimpie	0:0f7bbfde44b7	257
Wimpie	0:0f7bbfde44b7	258	free(MemAll);
Wimpie	0:0f7bbfde44b7	259	}
Wimpie	0:0f7bbfde44b7	260	}
Wimpie	0:0f7bbfde44b7	261

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Type:	Library
Created:	21 Mar 2011
Imports:	66
Forks:	0
Commits:	3
Dependents:	1
Dependencies:	0
Followers:	5

OneWireEEPROM.cpp@0:0f7bbfde44b7, 2011-03-21 (annotated)

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