OneWire - Implementation of 1-Wire with added Alarm Search …

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Implementation of 1-Wire with added Alarm Search Functionality

Dependents: Max32630_One_Wire_Interface

OneWire_Masters/DS2465/DS2465.cpp@22:686273e55cdc, 2016-03-21 (annotated)

Committer:: j3
Date:: Mon Mar 21 21:41:36 2016 +0000
Revision:: 22:686273e55cdc
Parent:: 21:00c94aeb533e
Child:: 24:8942d8478d68

Changed argument to slave(s) constructor from OneWireInterface to OneWireMaster

Who changed what in which revision?

User	Revision	Line number	New contents of line
IanBenzMaxim	21:00c94aeb533e	1	#include "DS2465.hpp"
IanBenzMaxim	21:00c94aeb533e	2
IanBenzMaxim	21:00c94aeb533e	3	#define I2C_WRITE 0
IanBenzMaxim	21:00c94aeb533e	4	#define I2C_READ 1
IanBenzMaxim	21:00c94aeb533e	5
IanBenzMaxim	21:00c94aeb533e	6	// DS2465 commands
IanBenzMaxim	21:00c94aeb533e	7	#define CMD_1WMR 0xF0
IanBenzMaxim	21:00c94aeb533e	8	#define CMD_WCFG 0xD2
IanBenzMaxim	21:00c94aeb533e	9	#define CMD_CHSL 0xC3
IanBenzMaxim	21:00c94aeb533e	10	#define CMD_SRP 0xE1
IanBenzMaxim	21:00c94aeb533e	11
IanBenzMaxim	21:00c94aeb533e	12	#define CMD_1WRS 0xB4
IanBenzMaxim	21:00c94aeb533e	13	#define CMD_1WWB 0xA5
IanBenzMaxim	21:00c94aeb533e	14	#define CMD_1WRB 0x96
IanBenzMaxim	21:00c94aeb533e	15	#define CMD_1WSB 0x87
IanBenzMaxim	21:00c94aeb533e	16	#define CMD_1WT 0x78
IanBenzMaxim	21:00c94aeb533e	17	#define CMD_1WTB 0x69
IanBenzMaxim	21:00c94aeb533e	18	#define CMD_1WRF 0xE1
IanBenzMaxim	21:00c94aeb533e	19	#define CMD_CPS 0x5A
IanBenzMaxim	21:00c94aeb533e	20	#define CMD_CSS 0x4B
IanBenzMaxim	21:00c94aeb533e	21	#define CMD_CSAM 0x3C
IanBenzMaxim	21:00c94aeb533e	22	#define CMD_CSWM 0x2D
IanBenzMaxim	21:00c94aeb533e	23	#define CMD_CNMS 0x1E
IanBenzMaxim	21:00c94aeb533e	24	#define CMD_SPR 0x0F
IanBenzMaxim	21:00c94aeb533e	25
IanBenzMaxim	21:00c94aeb533e	26	// DS2465 config bits
IanBenzMaxim	21:00c94aeb533e	27	#define CONFIG_APU 0x01
IanBenzMaxim	21:00c94aeb533e	28	#define CONFIG_PDN 0x02
IanBenzMaxim	21:00c94aeb533e	29	#define CONFIG_SPU 0x04
IanBenzMaxim	21:00c94aeb533e	30	#define CONFIG_1WS 0x08
IanBenzMaxim	21:00c94aeb533e	31
IanBenzMaxim	21:00c94aeb533e	32	// DS2465 status bits
IanBenzMaxim	21:00c94aeb533e	33	#define STATUS_1WB 0x01
IanBenzMaxim	21:00c94aeb533e	34	#define STATUS_PPD 0x02
IanBenzMaxim	21:00c94aeb533e	35	#define STATUS_SD 0x04
IanBenzMaxim	21:00c94aeb533e	36	#define STATUS_LL 0x08
IanBenzMaxim	21:00c94aeb533e	37	#define STATUS_RST 0x10
IanBenzMaxim	21:00c94aeb533e	38	#define STATUS_SBR 0x20
IanBenzMaxim	21:00c94aeb533e	39	#define STATUS_TSB 0x40
IanBenzMaxim	21:00c94aeb533e	40	#define STATUS_DIR 0x80
IanBenzMaxim	21:00c94aeb533e	41
IanBenzMaxim	21:00c94aeb533e	42	// delays (if not polling for complete)
IanBenzMaxim	21:00c94aeb533e	43	#define EEPROM_WRITE_DELAY 30
IanBenzMaxim	21:00c94aeb533e	44	#define LOAD_SECRET_DELAY 90
IanBenzMaxim	21:00c94aeb533e	45	#define SHA_COMPUTATION_DELAY 5
IanBenzMaxim	21:00c94aeb533e	46
IanBenzMaxim	21:00c94aeb533e	47	static const int I2C_WRITE_OK = 0;
IanBenzMaxim	21:00c94aeb533e	48
IanBenzMaxim	21:00c94aeb533e	49	DS2465::DS2465(I2C & I2C_interface, unsigned char I2C_address)
IanBenzMaxim	21:00c94aeb533e	50	: m_I2C_interface(I2C_interface), m_I2C_address(I2C_address)
IanBenzMaxim	21:00c94aeb533e	51	{
IanBenzMaxim	21:00c94aeb533e	52
IanBenzMaxim	21:00c94aeb533e	53	}
IanBenzMaxim	21:00c94aeb533e	54
IanBenzMaxim	21:00c94aeb533e	55
IanBenzMaxim	21:00c94aeb533e	56
IanBenzMaxim	21:00c94aeb533e	57
IanBenzMaxim	21:00c94aeb533e	58	OneWireMaster::CmdResult DS2465::OWInitMaster()
IanBenzMaxim	21:00c94aeb533e	59	{
IanBenzMaxim	21:00c94aeb533e	60	return Detect();
IanBenzMaxim	21:00c94aeb533e	61	}
IanBenzMaxim	21:00c94aeb533e	62
IanBenzMaxim	21:00c94aeb533e	63
IanBenzMaxim	21:00c94aeb533e	64	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	65	// Compute Next Master Secret DS2465
IanBenzMaxim	21:00c94aeb533e	66	//
IanBenzMaxim	21:00c94aeb533e	67	// 'swap' - 1 if swapping a page into the computation
IanBenzMaxim	21:00c94aeb533e	68	// 'page' - page number to swap in
IanBenzMaxim	21:00c94aeb533e	69	// 'region' - (1) first 1/2 page, (2) second 1/2 page, (3) entire page
IanBenzMaxim	21:00c94aeb533e	70	//
IanBenzMaxim	21:00c94aeb533e	71	// Returns: true write successful
IanBenzMaxim	21:00c94aeb533e	72	// false failure to complete read
IanBenzMaxim	21:00c94aeb533e	73	//
IanBenzMaxim	21:00c94aeb533e	74	OneWireMaster::CmdResult DS2465::Compute_NextMasterSecret(bool swap, unsigned int pageNum, PageRegion region)
IanBenzMaxim	21:00c94aeb533e	75	{
IanBenzMaxim	21:00c94aeb533e	76	uint8_t par;
IanBenzMaxim	21:00c94aeb533e	77
IanBenzMaxim	21:00c94aeb533e	78	// create parameter byte
IanBenzMaxim	21:00c94aeb533e	79	if (!swap)
IanBenzMaxim	21:00c94aeb533e	80	par = 0xBF;
IanBenzMaxim	21:00c94aeb533e	81	else
IanBenzMaxim	21:00c94aeb533e	82	par = (0xC8 \| (pageNum << 4) \| region);
IanBenzMaxim	21:00c94aeb533e	83
IanBenzMaxim	21:00c94aeb533e	84	return Write_Command_Reg(CMD_CNMS, par, false);
IanBenzMaxim	21:00c94aeb533e	85	}
IanBenzMaxim	21:00c94aeb533e	86
IanBenzMaxim	21:00c94aeb533e	87	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	88	// Compute Write MAC DS2465
IanBenzMaxim	21:00c94aeb533e	89	//
IanBenzMaxim	21:00c94aeb533e	90	// 'regwrite' - true if writing to a register, false if regular memory
IanBenzMaxim	21:00c94aeb533e	91	// 'swap' - true if swapping a page into the computation
IanBenzMaxim	21:00c94aeb533e	92	// 'page' - page number to swap in
IanBenzMaxim	21:00c94aeb533e	93	// 'segment' - segment number if swaping
IanBenzMaxim	21:00c94aeb533e	94	//
IanBenzMaxim	21:00c94aeb533e	95	// Returns: true write successful
IanBenzMaxim	21:00c94aeb533e	96	// false failure to complete read
IanBenzMaxim	21:00c94aeb533e	97	//
IanBenzMaxim	21:00c94aeb533e	98	OneWireMaster::CmdResult DS2465::Compute_WriteMAC(bool regwrite, bool swap, unsigned int pageNum, unsigned int segmentNum) const
IanBenzMaxim	21:00c94aeb533e	99	{
IanBenzMaxim	21:00c94aeb533e	100	uint8_t par;
IanBenzMaxim	21:00c94aeb533e	101
IanBenzMaxim	21:00c94aeb533e	102	// create parameter byte
IanBenzMaxim	21:00c94aeb533e	103	par = ((regwrite << 7) \| (swap << 6) \| (pageNum << 4) \| segmentNum);
IanBenzMaxim	21:00c94aeb533e	104
IanBenzMaxim	21:00c94aeb533e	105	return Write_Command_Reg(CMD_CSWM, par, false);
IanBenzMaxim	21:00c94aeb533e	106	}
IanBenzMaxim	21:00c94aeb533e	107
IanBenzMaxim	21:00c94aeb533e	108	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	109	// Compute Slave Authentication MAC DS2465
IanBenzMaxim	21:00c94aeb533e	110	//
IanBenzMaxim	21:00c94aeb533e	111	// 'swap' - true if swapping a page into the computation
IanBenzMaxim	21:00c94aeb533e	112	// 'page' - page number to swap in
IanBenzMaxim	21:00c94aeb533e	113	// 'region' - (1) first 1/2 page, (2) second 1/2 page, (3) entire page
IanBenzMaxim	21:00c94aeb533e	114	//
IanBenzMaxim	21:00c94aeb533e	115	// Returns: true write successful
IanBenzMaxim	21:00c94aeb533e	116	// false failure to complete read
IanBenzMaxim	21:00c94aeb533e	117	//
IanBenzMaxim	21:00c94aeb533e	118	OneWireMaster::CmdResult DS2465::Compute_AuthMAC(bool swap, unsigned int pageNum, PageRegion region) const
IanBenzMaxim	21:00c94aeb533e	119	{
IanBenzMaxim	21:00c94aeb533e	120	uint8_t par;
IanBenzMaxim	21:00c94aeb533e	121
IanBenzMaxim	21:00c94aeb533e	122	// create parameter byte
IanBenzMaxim	21:00c94aeb533e	123	if (!swap)
IanBenzMaxim	21:00c94aeb533e	124	par = 0xBF;
IanBenzMaxim	21:00c94aeb533e	125	else
IanBenzMaxim	21:00c94aeb533e	126	par = (0xC8 \| (pageNum << 4) \| region);
IanBenzMaxim	21:00c94aeb533e	127
IanBenzMaxim	21:00c94aeb533e	128	return Write_Command_Reg(CMD_CSAM, par, false);
IanBenzMaxim	21:00c94aeb533e	129	}
IanBenzMaxim	21:00c94aeb533e	130
IanBenzMaxim	21:00c94aeb533e	131	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	132	// Compute S-Secret on DS2465
IanBenzMaxim	21:00c94aeb533e	133	//
IanBenzMaxim	21:00c94aeb533e	134	// 'swap' - true if swapping a page into the computation
IanBenzMaxim	21:00c94aeb533e	135	// 'page' - page number to swap in
IanBenzMaxim	21:00c94aeb533e	136	// 'region' - (1) first 1/2 page, (2) second 1/2 page, (3) entire page
IanBenzMaxim	21:00c94aeb533e	137	//
IanBenzMaxim	21:00c94aeb533e	138	// Returns: true write successful
IanBenzMaxim	21:00c94aeb533e	139	// false failure to complete read
IanBenzMaxim	21:00c94aeb533e	140	//
IanBenzMaxim	21:00c94aeb533e	141	OneWireMaster::CmdResult DS2465::Compute_SSecret(bool swap, unsigned int pageNum, PageRegion region)
IanBenzMaxim	21:00c94aeb533e	142	{
IanBenzMaxim	21:00c94aeb533e	143	uint8_t par;
IanBenzMaxim	21:00c94aeb533e	144
IanBenzMaxim	21:00c94aeb533e	145	// create parameter byte
IanBenzMaxim	21:00c94aeb533e	146	if (!swap)
IanBenzMaxim	21:00c94aeb533e	147	par = 0xBF;
IanBenzMaxim	21:00c94aeb533e	148	else
IanBenzMaxim	21:00c94aeb533e	149	par = (0xC8 \| (pageNum << 4) \| region);
IanBenzMaxim	21:00c94aeb533e	150
IanBenzMaxim	21:00c94aeb533e	151	return Write_Command_Reg(CMD_CSS, par, false);
IanBenzMaxim	21:00c94aeb533e	152	}
IanBenzMaxim	21:00c94aeb533e	153
IanBenzMaxim	21:00c94aeb533e	154
IanBenzMaxim	21:00c94aeb533e	155
IanBenzMaxim	21:00c94aeb533e	156
IanBenzMaxim	21:00c94aeb533e	157	ISha256MacCoprocessor::CmdResult DS2465::setMasterSecret(const std::uint8_t (&secret)[secret_len])
IanBenzMaxim	21:00c94aeb533e	158	{
IanBenzMaxim	21:00c94aeb533e	159	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	160	result = WriteScratchpad(ADDR_SPAD, secret, secret_len);
IanBenzMaxim	21:00c94aeb533e	161	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	162	result = CopyScratchpad(1, 0, 1, 0);
IanBenzMaxim	21:00c94aeb533e	163	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	164	wait_ms(8 * EEPROM_WRITE_DELAY);
IanBenzMaxim	21:00c94aeb533e	165	return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure);
IanBenzMaxim	21:00c94aeb533e	166	}
IanBenzMaxim	21:00c94aeb533e	167
IanBenzMaxim	21:00c94aeb533e	168	ISha256MacCoprocessor::CmdResult DS2465::ComputeAndRead_WriteMAC(const std::uint8_t (&WriteMAC_data)[WriteMAC_data_len], std::uint8_t (&mac)[mac_len]) const
IanBenzMaxim	21:00c94aeb533e	169	{
IanBenzMaxim	21:00c94aeb533e	170	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	171	// Write input data to scratchpad
IanBenzMaxim	21:00c94aeb533e	172	result = WriteScratchpad(ADDR_SPAD, WriteMAC_data, WriteMAC_data_len);
IanBenzMaxim	21:00c94aeb533e	173	// Compute MAC
IanBenzMaxim	21:00c94aeb533e	174	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	175	result = Compute_WriteMAC(false, false, 0, 0);
IanBenzMaxim	21:00c94aeb533e	176	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	177	{
IanBenzMaxim	21:00c94aeb533e	178	wait_ms(SHA_COMPUTATION_DELAY);
IanBenzMaxim	21:00c94aeb533e	179	// Read MAC from register
IanBenzMaxim	21:00c94aeb533e	180	result = ReadMemory(ADDR_MAC_READ, mac, mac_len, true);
IanBenzMaxim	21:00c94aeb533e	181	}
IanBenzMaxim	21:00c94aeb533e	182	return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure);
IanBenzMaxim	21:00c94aeb533e	183	}
IanBenzMaxim	21:00c94aeb533e	184
IanBenzMaxim	21:00c94aeb533e	185	ISha256MacCoprocessor::CmdResult DS2465::ComputeAndRead_AuthMAC(const std::uint8_t (&devicePage)[devicePage_len], const std::uint8_t (&challenge)[deviceScratchpad_len],
IanBenzMaxim	21:00c94aeb533e	186	const std::uint8_t (&AuthMAC_data)[AuthMAC_data_len], std::uint8_t (&mac)[mac_len]) const
IanBenzMaxim	21:00c94aeb533e	187	{
IanBenzMaxim	21:00c94aeb533e	188	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	189	int addr = ADDR_SPAD;
IanBenzMaxim	21:00c94aeb533e	190	// Write input data to scratchpad
IanBenzMaxim	21:00c94aeb533e	191	result = WriteScratchpad(addr, devicePage, devicePage_len);
IanBenzMaxim	21:00c94aeb533e	192	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	193	{
IanBenzMaxim	21:00c94aeb533e	194	addr += devicePage_len;
IanBenzMaxim	21:00c94aeb533e	195	result = WriteScratchpad(addr, challenge, deviceScratchpad_len);
IanBenzMaxim	21:00c94aeb533e	196	}
IanBenzMaxim	21:00c94aeb533e	197	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	198	{
IanBenzMaxim	21:00c94aeb533e	199	addr += deviceScratchpad_len;
IanBenzMaxim	21:00c94aeb533e	200	result = WriteScratchpad(addr, AuthMAC_data, AuthMAC_data_len);
IanBenzMaxim	21:00c94aeb533e	201	}
IanBenzMaxim	21:00c94aeb533e	202	// Compute MAC
IanBenzMaxim	21:00c94aeb533e	203	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	204	result = Compute_AuthMAC(false, 0, REGION_FULL_PAGE);
IanBenzMaxim	21:00c94aeb533e	205	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	206	{
IanBenzMaxim	21:00c94aeb533e	207	wait_ms(SHA_COMPUTATION_DELAY * 2);
IanBenzMaxim	21:00c94aeb533e	208	// Read MAC from register
IanBenzMaxim	21:00c94aeb533e	209	result = ReadMemory(ADDR_MAC_READ, mac, mac_len, true);
IanBenzMaxim	21:00c94aeb533e	210	}
IanBenzMaxim	21:00c94aeb533e	211	return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure);
IanBenzMaxim	21:00c94aeb533e	212	}
IanBenzMaxim	21:00c94aeb533e	213
IanBenzMaxim	21:00c94aeb533e	214	ISha256MacCoprocessor::CmdResult DS2465::Compute_SSecret(const unsigned char (&devicePage)[devicePage_len], const unsigned char (&deviceScratchpad)[deviceScratchpad_len],
IanBenzMaxim	21:00c94aeb533e	215	const unsigned char (&SSecret_data)[SSecret_data_len])
IanBenzMaxim	21:00c94aeb533e	216	{
IanBenzMaxim	21:00c94aeb533e	217	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	218	int addr = ADDR_SPAD;
IanBenzMaxim	21:00c94aeb533e	219	// Write input data to scratchpad
IanBenzMaxim	21:00c94aeb533e	220	result = WriteScratchpad(addr, devicePage, devicePage_len);
IanBenzMaxim	21:00c94aeb533e	221	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	222	{
IanBenzMaxim	21:00c94aeb533e	223	addr += devicePage_len;
IanBenzMaxim	21:00c94aeb533e	224	result = WriteScratchpad(addr, deviceScratchpad, deviceScratchpad_len);
IanBenzMaxim	21:00c94aeb533e	225	}
IanBenzMaxim	21:00c94aeb533e	226	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	227	{
IanBenzMaxim	21:00c94aeb533e	228	addr += deviceScratchpad_len;
IanBenzMaxim	21:00c94aeb533e	229	result = WriteScratchpad(addr, SSecret_data, SSecret_data_len);
IanBenzMaxim	21:00c94aeb533e	230	}
IanBenzMaxim	21:00c94aeb533e	231	// Compute secret
IanBenzMaxim	21:00c94aeb533e	232	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	233	result = Compute_SSecret(false, 0, REGION_FULL_PAGE);
IanBenzMaxim	21:00c94aeb533e	234	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	235	wait_ms(SHA_COMPUTATION_DELAY * 2);
IanBenzMaxim	21:00c94aeb533e	236	return (result == OneWireMaster::Success ? ISha256MacCoprocessor::Success : ISha256MacCoprocessor::OperationFailure);
IanBenzMaxim	21:00c94aeb533e	237	}
IanBenzMaxim	21:00c94aeb533e	238
IanBenzMaxim	21:00c94aeb533e	239	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	240	// Copy Scratchpad on DS2465 to either secret or memory page
IanBenzMaxim	21:00c94aeb533e	241	//
IanBenzMaxim	21:00c94aeb533e	242	// 'dest_secret' - 1 if destination is secret, 0 if memory page
IanBenzMaxim	21:00c94aeb533e	243	// 'page' - page number if dest_secret=0
IanBenzMaxim	21:00c94aeb533e	244	// 'notfull' - 0 if only 4 byte segment, 1 if writing to full page,
IanBenzMaxim	21:00c94aeb533e	245	// 'seg' - Segment number if full=0.
IanBenzMaxim	21:00c94aeb533e	246	//
IanBenzMaxim	21:00c94aeb533e	247	// Returns: true write successful
IanBenzMaxim	21:00c94aeb533e	248	// false failure to complete read
IanBenzMaxim	21:00c94aeb533e	249	//
IanBenzMaxim	21:00c94aeb533e	250	OneWireMaster::CmdResult DS2465::CopyScratchpad(bool dest_secret, unsigned int pageNum, bool notFull, unsigned int segmentNum)
IanBenzMaxim	21:00c94aeb533e	251	{
IanBenzMaxim	21:00c94aeb533e	252	uint8_t par;
IanBenzMaxim	21:00c94aeb533e	253
IanBenzMaxim	21:00c94aeb533e	254	// create parameter byte
IanBenzMaxim	21:00c94aeb533e	255	if (dest_secret)
IanBenzMaxim	21:00c94aeb533e	256	par = 0;
IanBenzMaxim	21:00c94aeb533e	257	else
IanBenzMaxim	21:00c94aeb533e	258	par = (0x80 \| (pageNum << 4) \| (notFull << 3) \| segmentNum);
IanBenzMaxim	21:00c94aeb533e	259
IanBenzMaxim	21:00c94aeb533e	260	return Write_Command_Reg(CMD_CPS, par, false);
IanBenzMaxim	21:00c94aeb533e	261	}
IanBenzMaxim	21:00c94aeb533e	262
IanBenzMaxim	21:00c94aeb533e	263	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	264	// APU enable or disable
IanBenzMaxim	21:00c94aeb533e	265	//
IanBenzMaxim	21:00c94aeb533e	266	// 'readflag' - 1 if reading current configuration
IanBenzMaxim	21:00c94aeb533e	267	// 'apu_enable' - 1 to enable
IanBenzMaxim	21:00c94aeb533e	268	//
IanBenzMaxim	21:00c94aeb533e	269	// Returns: true if write successful, or return configuration value if reading
IanBenzMaxim	21:00c94aeb533e	270	//
IanBenzMaxim	21:00c94aeb533e	271	OneWireMaster::CmdResult DS2465::ConfigureAPU(bool apu_enable)
IanBenzMaxim	21:00c94aeb533e	272	{
IanBenzMaxim	21:00c94aeb533e	273	// clear power down bit in the global config state
IanBenzMaxim	21:00c94aeb533e	274	cAPU = apu_enable ? CONFIG_APU : 0;
IanBenzMaxim	21:00c94aeb533e	275
IanBenzMaxim	21:00c94aeb533e	276	// write the new config
IanBenzMaxim	21:00c94aeb533e	277	return Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	278	}
IanBenzMaxim	21:00c94aeb533e	279
IanBenzMaxim	21:00c94aeb533e	280	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	281	// Power up 1-Wire using extended function
IanBenzMaxim	21:00c94aeb533e	282	//
IanBenzMaxim	21:00c94aeb533e	283	// Returns: true successful
IanBenzMaxim	21:00c94aeb533e	284	// false failure during communication
IanBenzMaxim	21:00c94aeb533e	285	//
IanBenzMaxim	21:00c94aeb533e	286	OneWireMaster::CmdResult DS2465::OWPowerUp(void)
IanBenzMaxim	21:00c94aeb533e	287	{
IanBenzMaxim	21:00c94aeb533e	288	OneWireMaster::CmdResult rt;
IanBenzMaxim	21:00c94aeb533e	289
IanBenzMaxim	21:00c94aeb533e	290	// clear power down bit in the global config state
IanBenzMaxim	21:00c94aeb533e	291	cPDN = 0;
IanBenzMaxim	21:00c94aeb533e	292
IanBenzMaxim	21:00c94aeb533e	293	// write the new config
IanBenzMaxim	21:00c94aeb533e	294	rt = Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	295
IanBenzMaxim	21:00c94aeb533e	296	// delay 2ms to allow units to power up
IanBenzMaxim	21:00c94aeb533e	297	wait_ms(2);
IanBenzMaxim	21:00c94aeb533e	298
IanBenzMaxim	21:00c94aeb533e	299	return rt;
IanBenzMaxim	21:00c94aeb533e	300	}
IanBenzMaxim	21:00c94aeb533e	301
IanBenzMaxim	21:00c94aeb533e	302	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	303	// Power down 1-Wire using extended function
IanBenzMaxim	21:00c94aeb533e	304	//
IanBenzMaxim	21:00c94aeb533e	305	// Returns: true successful
IanBenzMaxim	21:00c94aeb533e	306	// false program voltage not available
IanBenzMaxim	21:00c94aeb533e	307	//
IanBenzMaxim	21:00c94aeb533e	308	OneWireMaster::CmdResult DS2465::OWPowerDown(void)
IanBenzMaxim	21:00c94aeb533e	309	{
IanBenzMaxim	21:00c94aeb533e	310	// set power down bit in the global config state
IanBenzMaxim	21:00c94aeb533e	311	cPDN = CONFIG_PDN;
IanBenzMaxim	21:00c94aeb533e	312
IanBenzMaxim	21:00c94aeb533e	313	// write the new config
IanBenzMaxim	21:00c94aeb533e	314	return Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	315	}
IanBenzMaxim	21:00c94aeb533e	316
IanBenzMaxim	21:00c94aeb533e	317	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	318	// Send 1 bit of communication to the 1-Wire Net and verify that the
IanBenzMaxim	21:00c94aeb533e	319	// response matches the 'applyPowerResponse' bit and apply power delivery
IanBenzMaxim	21:00c94aeb533e	320	// to the 1-Wire net. Note that some implementations may apply the power
IanBenzMaxim	21:00c94aeb533e	321	// first and then turn it off if the response is incorrect.
IanBenzMaxim	21:00c94aeb533e	322	//
IanBenzMaxim	21:00c94aeb533e	323	// 'applyPowerResponse' - 1 bit response to check, if correct then start
IanBenzMaxim	21:00c94aeb533e	324	// power delivery
IanBenzMaxim	21:00c94aeb533e	325	//
IanBenzMaxim	21:00c94aeb533e	326	// Returns: true: bit written and response correct, strong pullup now on
IanBenzMaxim	21:00c94aeb533e	327	// false: response incorrect
IanBenzMaxim	21:00c94aeb533e	328	//
IanBenzMaxim	21:00c94aeb533e	329	OneWireMaster::CmdResult DS2465::OWReadBitPower(uint8_t applyPowerResponse)
IanBenzMaxim	21:00c94aeb533e	330	{
IanBenzMaxim	21:00c94aeb533e	331	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	332	uint8_t rdbit;
IanBenzMaxim	21:00c94aeb533e	333
IanBenzMaxim	21:00c94aeb533e	334	// set strong pull-up enable
IanBenzMaxim	21:00c94aeb533e	335	cSPU = CONFIG_SPU;
IanBenzMaxim	21:00c94aeb533e	336
IanBenzMaxim	21:00c94aeb533e	337	// write the new config
IanBenzMaxim	21:00c94aeb533e	338	result = Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	339	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	340	return result;
IanBenzMaxim	21:00c94aeb533e	341
IanBenzMaxim	21:00c94aeb533e	342	// perform read bit
IanBenzMaxim	21:00c94aeb533e	343	result = OWReadBit(rdbit);
IanBenzMaxim	21:00c94aeb533e	344	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	345	return result;
IanBenzMaxim	21:00c94aeb533e	346
IanBenzMaxim	21:00c94aeb533e	347	// check if response was correct, if not then turn off strong pull-up
IanBenzMaxim	21:00c94aeb533e	348	if (rdbit != applyPowerResponse)
IanBenzMaxim	21:00c94aeb533e	349	{
IanBenzMaxim	21:00c94aeb533e	350	OWLevel(LEVEL_NORMAL);
IanBenzMaxim	21:00c94aeb533e	351	return OneWireMaster::OperationFailure;
IanBenzMaxim	21:00c94aeb533e	352	}
IanBenzMaxim	21:00c94aeb533e	353
IanBenzMaxim	21:00c94aeb533e	354	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	355	}
IanBenzMaxim	21:00c94aeb533e	356
IanBenzMaxim	21:00c94aeb533e	357	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	358	// Read 8 bits of communication from the 1-Wire Net. After the
IanBenzMaxim	21:00c94aeb533e	359	// 8 bits are read then change the level of the 1-Wire net.
IanBenzMaxim	21:00c94aeb533e	360	//
IanBenzMaxim	21:00c94aeb533e	361	// Returns: 8 bits read from 1-Wire Net
IanBenzMaxim	21:00c94aeb533e	362	//
IanBenzMaxim	21:00c94aeb533e	363	OneWireMaster::CmdResult DS2465::OWReadBytePower(uint8_t & recvbyte)
IanBenzMaxim	21:00c94aeb533e	364	{
IanBenzMaxim	21:00c94aeb533e	365	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	366
IanBenzMaxim	21:00c94aeb533e	367	// set strong pull-up enable
IanBenzMaxim	21:00c94aeb533e	368	cSPU = CONFIG_SPU;
IanBenzMaxim	21:00c94aeb533e	369
IanBenzMaxim	21:00c94aeb533e	370	// write the new config
IanBenzMaxim	21:00c94aeb533e	371	result = Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	372	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	373	return result;
IanBenzMaxim	21:00c94aeb533e	374
IanBenzMaxim	21:00c94aeb533e	375	// do the read byte
IanBenzMaxim	21:00c94aeb533e	376	result = OWReadByte(recvbyte);
IanBenzMaxim	21:00c94aeb533e	377	return result;
IanBenzMaxim	21:00c94aeb533e	378	}
IanBenzMaxim	21:00c94aeb533e	379
IanBenzMaxim	21:00c94aeb533e	380	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	381	// Send 8 bits of communication to the 1-Wire Net and verify that the
IanBenzMaxim	21:00c94aeb533e	382	// 8 bits read from the 1-Wire Net is the same (write operation).
IanBenzMaxim	21:00c94aeb533e	383	// The parameter 'sendbyte' least significant 8 bits are used. After the
IanBenzMaxim	21:00c94aeb533e	384	// 8 bits are sent change the level of the 1-Wire net.
IanBenzMaxim	21:00c94aeb533e	385	//
IanBenzMaxim	21:00c94aeb533e	386	// 'sendbyte' - 8 bits to send (least significant bit)
IanBenzMaxim	21:00c94aeb533e	387	//
IanBenzMaxim	21:00c94aeb533e	388	OneWireMaster::CmdResult DS2465::OWWriteBytePower(uint8_t sendbyte)
IanBenzMaxim	21:00c94aeb533e	389	{
IanBenzMaxim	21:00c94aeb533e	390	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	391
IanBenzMaxim	21:00c94aeb533e	392	// set strong pull-up enable
IanBenzMaxim	21:00c94aeb533e	393	cSPU = CONFIG_SPU;
IanBenzMaxim	21:00c94aeb533e	394
IanBenzMaxim	21:00c94aeb533e	395	// write the new config
IanBenzMaxim	21:00c94aeb533e	396	result = Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	397	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	398	return result;
IanBenzMaxim	21:00c94aeb533e	399
IanBenzMaxim	21:00c94aeb533e	400	// perform write byte
IanBenzMaxim	21:00c94aeb533e	401	return OWWriteByte(sendbyte);
IanBenzMaxim	21:00c94aeb533e	402	}
IanBenzMaxim	21:00c94aeb533e	403
IanBenzMaxim	21:00c94aeb533e	404	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	405	// Set the 1-Wire Net line level pull-up to normal. The DS2465 does only
IanBenzMaxim	21:00c94aeb533e	406	// allows enabling strong pull-up on a bit or byte event. Consequently this
IanBenzMaxim	21:00c94aeb533e	407	// function only allows the MODE_STANDARD argument. To enable strong pull-up
IanBenzMaxim	21:00c94aeb533e	408	// use OWWriteBytePower or OWReadBitPower.
IanBenzMaxim	21:00c94aeb533e	409	//
IanBenzMaxim	21:00c94aeb533e	410	// 'new_level' - new level defined as
IanBenzMaxim	21:00c94aeb533e	411	// MODE_STANDARD 0x00
IanBenzMaxim	21:00c94aeb533e	412	//
IanBenzMaxim	21:00c94aeb533e	413	// Returns: current 1-Wire Net level
IanBenzMaxim	21:00c94aeb533e	414	//
IanBenzMaxim	21:00c94aeb533e	415	OneWireMaster::CmdResult DS2465::OWLevel(OW_LEVEL new_level)
IanBenzMaxim	21:00c94aeb533e	416	{
IanBenzMaxim	21:00c94aeb533e	417	// function only will turn back to non-strong pull-up
IanBenzMaxim	21:00c94aeb533e	418	if (new_level != LEVEL_NORMAL)
IanBenzMaxim	21:00c94aeb533e	419	return OneWireMaster::OperationFailure;
IanBenzMaxim	21:00c94aeb533e	420
IanBenzMaxim	21:00c94aeb533e	421	// clear the strong pull-up bit in the global config state
IanBenzMaxim	21:00c94aeb533e	422	cSPU = 0;
IanBenzMaxim	21:00c94aeb533e	423
IanBenzMaxim	21:00c94aeb533e	424	// write the new config
IanBenzMaxim	21:00c94aeb533e	425	return Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	426	}
IanBenzMaxim	21:00c94aeb533e	427
IanBenzMaxim	21:00c94aeb533e	428	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	429	// The 'OWOverdriveMatchROM' function does an overdrive Match-ROM using the
IanBenzMaxim	21:00c94aeb533e	430	// global ROM_NO device
IanBenzMaxim	21:00c94aeb533e	431	//
IanBenzMaxim	21:00c94aeb533e	432	// Returns: true (1) : OWReset successful and match rom sent.
IanBenzMaxim	21:00c94aeb533e	433	// false (0): OWReset did not have presence
IanBenzMaxim	21:00c94aeb533e	434	//
IanBenzMaxim	21:00c94aeb533e	435	OneWireMaster::CmdResult DS2465::OWOverdriveMatchROM(const RomId & romId)
IanBenzMaxim	21:00c94aeb533e	436	{
IanBenzMaxim	21:00c94aeb533e	437	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	438	// use overdrive MatchROM
IanBenzMaxim	21:00c94aeb533e	439	OWSpeed(SPEED_STANDARD);
IanBenzMaxim	21:00c94aeb533e	440	result = OWReset();
IanBenzMaxim	21:00c94aeb533e	441	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	442	{
IanBenzMaxim	21:00c94aeb533e	443	result = OWWriteByte(0x69);
IanBenzMaxim	21:00c94aeb533e	444	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	445	{
IanBenzMaxim	21:00c94aeb533e	446	OWSpeed(SPEED_OVERDRIVE);
IanBenzMaxim	21:00c94aeb533e	447	// send ROM
IanBenzMaxim	21:00c94aeb533e	448	result = OWWriteBlock(false, romId, RomId::byteLen);
IanBenzMaxim	21:00c94aeb533e	449	}
IanBenzMaxim	21:00c94aeb533e	450	}
IanBenzMaxim	21:00c94aeb533e	451	return result;
IanBenzMaxim	21:00c94aeb533e	452	}
IanBenzMaxim	21:00c94aeb533e	453
IanBenzMaxim	21:00c94aeb533e	454	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	455	// The 'OWMatchROM' function does a Match-ROM using the global ROM_NO device
IanBenzMaxim	21:00c94aeb533e	456	//
IanBenzMaxim	21:00c94aeb533e	457	// Returns: true (1) : OWReset successful and match rom sent.
IanBenzMaxim	21:00c94aeb533e	458	// false (0): OWReset did not have presence
IanBenzMaxim	21:00c94aeb533e	459	//
IanBenzMaxim	21:00c94aeb533e	460	OneWireMaster::CmdResult DS2465::OWMatchROM(const RomId & romId)
IanBenzMaxim	21:00c94aeb533e	461	{
IanBenzMaxim	21:00c94aeb533e	462	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	463	uint8_t buf[1 + RomId::byteLen];
IanBenzMaxim	21:00c94aeb533e	464
IanBenzMaxim	21:00c94aeb533e	465	// use MatchROM
IanBenzMaxim	21:00c94aeb533e	466	result = OWReset();
IanBenzMaxim	21:00c94aeb533e	467	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	468	{
IanBenzMaxim	21:00c94aeb533e	469	buf[0] = 0x55;
IanBenzMaxim	21:00c94aeb533e	470	std::memcpy(&buf[1], romId, RomId::byteLen);
IanBenzMaxim	21:00c94aeb533e	471	// send command and rom
IanBenzMaxim	21:00c94aeb533e	472	result = OWWriteBlock(false, buf, 1 + RomId::byteLen);
IanBenzMaxim	21:00c94aeb533e	473	}
IanBenzMaxim	21:00c94aeb533e	474
IanBenzMaxim	21:00c94aeb533e	475	return result;
IanBenzMaxim	21:00c94aeb533e	476	}
IanBenzMaxim	21:00c94aeb533e	477
IanBenzMaxim	21:00c94aeb533e	478	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	479	// Setup the search to skip the current device type on the next call
IanBenzMaxim	21:00c94aeb533e	480	// to OWNext().
IanBenzMaxim	21:00c94aeb533e	481	//
IanBenzMaxim	21:00c94aeb533e	482	void DS2465::OWFamilySkipSetup(void)
IanBenzMaxim	21:00c94aeb533e	483	{
IanBenzMaxim	21:00c94aeb533e	484	// set the Last discrepancy to last family discrepancy
IanBenzMaxim	21:00c94aeb533e	485	m_lastDiscrepancy = m_lastFamilyDiscrepancy;
IanBenzMaxim	21:00c94aeb533e	486
IanBenzMaxim	21:00c94aeb533e	487	// clear the last family discrpepancy
IanBenzMaxim	21:00c94aeb533e	488	m_lastFamilyDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	489
IanBenzMaxim	21:00c94aeb533e	490	// check for end of list
IanBenzMaxim	21:00c94aeb533e	491	if (m_lastDiscrepancy == 0)
IanBenzMaxim	21:00c94aeb533e	492	m_lastDeviceFlag = true;
IanBenzMaxim	21:00c94aeb533e	493	}
IanBenzMaxim	21:00c94aeb533e	494
IanBenzMaxim	21:00c94aeb533e	495	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	496	// Setup the search to find the device type 'family_code' on the next call
IanBenzMaxim	21:00c94aeb533e	497	// to OWNext() if it is present.
IanBenzMaxim	21:00c94aeb533e	498	//
IanBenzMaxim	21:00c94aeb533e	499	void DS2465::OWTargetSetup(RomId & romId)
IanBenzMaxim	21:00c94aeb533e	500	{
IanBenzMaxim	21:00c94aeb533e	501	// set the search state to find SearchFamily type devices
IanBenzMaxim	21:00c94aeb533e	502	for (int i = 1; i < 8; i++)
IanBenzMaxim	21:00c94aeb533e	503	romId[i] = 0;
IanBenzMaxim	21:00c94aeb533e	504	m_lastDiscrepancy = 64;
IanBenzMaxim	21:00c94aeb533e	505	m_lastFamilyDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	506	m_lastDeviceFlag = false;
IanBenzMaxim	21:00c94aeb533e	507	}
IanBenzMaxim	21:00c94aeb533e	508
IanBenzMaxim	21:00c94aeb533e	509	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	510	// Verify the device with the ROM number in ROM_NO buffer is present.
IanBenzMaxim	21:00c94aeb533e	511	// Return true : device verified present
IanBenzMaxim	21:00c94aeb533e	512	// false : device not present
IanBenzMaxim	21:00c94aeb533e	513	//
IanBenzMaxim	21:00c94aeb533e	514	OneWireMaster::CmdResult DS2465::OWVerify(const RomId & romId)
IanBenzMaxim	21:00c94aeb533e	515	{
IanBenzMaxim	21:00c94aeb533e	516	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	517	RomId romIdCopy(romId);
IanBenzMaxim	21:00c94aeb533e	518	int ld_backup, ldf_backup, lfd_backup;
IanBenzMaxim	21:00c94aeb533e	519
IanBenzMaxim	21:00c94aeb533e	520	// keep a backup copy of the current state
IanBenzMaxim	21:00c94aeb533e	521	ld_backup = m_lastDiscrepancy;
IanBenzMaxim	21:00c94aeb533e	522	ldf_backup = m_lastDeviceFlag;
IanBenzMaxim	21:00c94aeb533e	523	lfd_backup = m_lastFamilyDiscrepancy;
IanBenzMaxim	21:00c94aeb533e	524
IanBenzMaxim	21:00c94aeb533e	525	// set search to find the same device
IanBenzMaxim	21:00c94aeb533e	526	m_lastDiscrepancy = 64;
IanBenzMaxim	21:00c94aeb533e	527	m_lastDeviceFlag = false;
IanBenzMaxim	21:00c94aeb533e	528
IanBenzMaxim	21:00c94aeb533e	529	result = OWSearch(romIdCopy);
IanBenzMaxim	21:00c94aeb533e	530	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	531	{
IanBenzMaxim	21:00c94aeb533e	532	// check if same device found
IanBenzMaxim	21:00c94aeb533e	533	if (romId != romIdCopy)
IanBenzMaxim	21:00c94aeb533e	534	{
IanBenzMaxim	21:00c94aeb533e	535	result = OneWireMaster::OperationFailure;
IanBenzMaxim	21:00c94aeb533e	536	}
IanBenzMaxim	21:00c94aeb533e	537	}
IanBenzMaxim	21:00c94aeb533e	538
IanBenzMaxim	21:00c94aeb533e	539	// restore the search state
IanBenzMaxim	21:00c94aeb533e	540	m_lastDiscrepancy = ld_backup;
IanBenzMaxim	21:00c94aeb533e	541	m_lastDeviceFlag = ldf_backup;
IanBenzMaxim	21:00c94aeb533e	542	m_lastFamilyDiscrepancy = lfd_backup;
IanBenzMaxim	21:00c94aeb533e	543
IanBenzMaxim	21:00c94aeb533e	544	// return the result of the verify
IanBenzMaxim	21:00c94aeb533e	545	return result;
IanBenzMaxim	21:00c94aeb533e	546	}
IanBenzMaxim	21:00c94aeb533e	547
IanBenzMaxim	21:00c94aeb533e	548	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	549	// Find the 'next' devices on the 1-Wire network
IanBenzMaxim	21:00c94aeb533e	550	// Return true : device found, ROM number in ROM_NO buffer
IanBenzMaxim	21:00c94aeb533e	551	// false : device not found, end of search
IanBenzMaxim	21:00c94aeb533e	552	//
IanBenzMaxim	21:00c94aeb533e	553	OneWireMaster::CmdResult DS2465::OWNext(RomId & romId)
IanBenzMaxim	21:00c94aeb533e	554	{
IanBenzMaxim	21:00c94aeb533e	555	// leave the search state alone
IanBenzMaxim	21:00c94aeb533e	556	return OWSearch(romId);
IanBenzMaxim	21:00c94aeb533e	557	}
IanBenzMaxim	21:00c94aeb533e	558
IanBenzMaxim	21:00c94aeb533e	559	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	560	// Set the 1-Wire Net communication speed.
IanBenzMaxim	21:00c94aeb533e	561	//
IanBenzMaxim	21:00c94aeb533e	562	// 'new_speed' - new speed defined as
IanBenzMaxim	21:00c94aeb533e	563	// MODE_STANDARD 0x00
IanBenzMaxim	21:00c94aeb533e	564	// MODE_OVERDRIVE 0x01
IanBenzMaxim	21:00c94aeb533e	565	//
IanBenzMaxim	21:00c94aeb533e	566	// Returns: current 1-Wire Net speed
IanBenzMaxim	21:00c94aeb533e	567	//
IanBenzMaxim	21:00c94aeb533e	568	OneWireMaster::CmdResult DS2465::OWSpeed(OW_SPEED new_speed)
IanBenzMaxim	21:00c94aeb533e	569	{
IanBenzMaxim	21:00c94aeb533e	570	// set the speed
IanBenzMaxim	21:00c94aeb533e	571	if (new_speed == SPEED_OVERDRIVE)
IanBenzMaxim	21:00c94aeb533e	572	c1WS = CONFIG_1WS;
IanBenzMaxim	21:00c94aeb533e	573	else
IanBenzMaxim	21:00c94aeb533e	574	c1WS = 0;
IanBenzMaxim	21:00c94aeb533e	575
IanBenzMaxim	21:00c94aeb533e	576	// write the new config
IanBenzMaxim	21:00c94aeb533e	577	return Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	578	}
IanBenzMaxim	21:00c94aeb533e	579
IanBenzMaxim	21:00c94aeb533e	580	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	581	// The 'OWOverdriveSkipROM' function does an Overdrive skip-ROM. Ignores
IanBenzMaxim	21:00c94aeb533e	582	// result from standard speed OWReset().
IanBenzMaxim	21:00c94aeb533e	583	//
IanBenzMaxim	21:00c94aeb533e	584	// Returns: true (1) : OWReset and skip rom sent.
IanBenzMaxim	21:00c94aeb533e	585	// false (0): Could not change to overdrive
IanBenzMaxim	21:00c94aeb533e	586	//
IanBenzMaxim	21:00c94aeb533e	587	OneWireMaster::CmdResult DS2465::OWOverdriveSkipROM(void)
IanBenzMaxim	21:00c94aeb533e	588	{
IanBenzMaxim	21:00c94aeb533e	589	OneWireMaster::CmdResult result = OWSpeed(SPEED_STANDARD);
IanBenzMaxim	21:00c94aeb533e	590	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	591	result = OWReset();
IanBenzMaxim	21:00c94aeb533e	592	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	593	result = OWWriteByte(0x3C);
IanBenzMaxim	21:00c94aeb533e	594	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	595	result = OWSpeed(SPEED_OVERDRIVE);
IanBenzMaxim	21:00c94aeb533e	596	return result;
IanBenzMaxim	21:00c94aeb533e	597	}
IanBenzMaxim	21:00c94aeb533e	598
IanBenzMaxim	21:00c94aeb533e	599	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	600	// The 'OWResume' function does a Resume command 0xA5.
IanBenzMaxim	21:00c94aeb533e	601	//
IanBenzMaxim	21:00c94aeb533e	602	// Returns: true (1) : OWReset successful and RESUME sent.
IanBenzMaxim	21:00c94aeb533e	603	// false (0): OWReset did not have presence
IanBenzMaxim	21:00c94aeb533e	604	//
IanBenzMaxim	21:00c94aeb533e	605	OneWireMaster::CmdResult DS2465::OWResume(void)
IanBenzMaxim	21:00c94aeb533e	606	{
IanBenzMaxim	21:00c94aeb533e	607	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	608	result = OWReset();
IanBenzMaxim	21:00c94aeb533e	609	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	610	{
IanBenzMaxim	21:00c94aeb533e	611	result = OWWriteByte(0xA5);
IanBenzMaxim	21:00c94aeb533e	612	}
IanBenzMaxim	21:00c94aeb533e	613	return result;
IanBenzMaxim	21:00c94aeb533e	614	}
IanBenzMaxim	21:00c94aeb533e	615
IanBenzMaxim	21:00c94aeb533e	616	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	617	// The 'OWSkipROM' function does a skip-ROM. This function
IanBenzMaxim	21:00c94aeb533e	618	// uses the Skip-ROM function CCh.
IanBenzMaxim	21:00c94aeb533e	619	//
IanBenzMaxim	21:00c94aeb533e	620	// Returns: true (1) : OWReset successful and skip rom sent.
IanBenzMaxim	21:00c94aeb533e	621	// false (0): OWReset did not have presence
IanBenzMaxim	21:00c94aeb533e	622	//
IanBenzMaxim	21:00c94aeb533e	623	OneWireMaster::CmdResult DS2465::OWSkipROM(void)
IanBenzMaxim	21:00c94aeb533e	624	{
IanBenzMaxim	21:00c94aeb533e	625	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	626	result = OWReset();
IanBenzMaxim	21:00c94aeb533e	627	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	628	{
IanBenzMaxim	21:00c94aeb533e	629	result = OWWriteByte(0xCC);
IanBenzMaxim	21:00c94aeb533e	630	}
IanBenzMaxim	21:00c94aeb533e	631	return result;
IanBenzMaxim	21:00c94aeb533e	632	}
IanBenzMaxim	21:00c94aeb533e	633
IanBenzMaxim	21:00c94aeb533e	634	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	635	// The 'OWReadROM' function does a Read-ROM. This function
IanBenzMaxim	21:00c94aeb533e	636	// uses the read-ROM function 33h to read a ROM number and verify CRC8.
IanBenzMaxim	21:00c94aeb533e	637	//
IanBenzMaxim	21:00c94aeb533e	638	// Returns: true (1) : OWReset successful and Serial Number placed
IanBenzMaxim	21:00c94aeb533e	639	// in the global ROM, CRC8 valid
IanBenzMaxim	21:00c94aeb533e	640	// false (0): OWReset did not have presence or CRC8 invalid
IanBenzMaxim	21:00c94aeb533e	641	//
IanBenzMaxim	21:00c94aeb533e	642	OneWireMaster::CmdResult DS2465::OWReadROM(RomId & romId)
IanBenzMaxim	21:00c94aeb533e	643	{
IanBenzMaxim	21:00c94aeb533e	644	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	645	uint8_t buf[2 + RomId::byteLen];
IanBenzMaxim	21:00c94aeb533e	646
IanBenzMaxim	21:00c94aeb533e	647	result = OWReset();
IanBenzMaxim	21:00c94aeb533e	648	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	649	result = OWWriteByte(0x33); // READ ROM
IanBenzMaxim	21:00c94aeb533e	650
IanBenzMaxim	21:00c94aeb533e	651	// read the ROM
IanBenzMaxim	21:00c94aeb533e	652	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	653	result = OWReadBlock(buf, RomId::byteLen);
IanBenzMaxim	21:00c94aeb533e	654
IanBenzMaxim	21:00c94aeb533e	655	// verify CRC8
IanBenzMaxim	21:00c94aeb533e	656	if ((result == OneWireMaster::Success) && (RomId::calculateCRC8(buf, RomId::byteLen) == 0) && (buf[1] != 0))
IanBenzMaxim	21:00c94aeb533e	657	romId = RomId(reinterpret_cast<std::uint8_t (&)[RomId::byteLen]>(buf[0]));
IanBenzMaxim	21:00c94aeb533e	658
IanBenzMaxim	21:00c94aeb533e	659	return result;
IanBenzMaxim	21:00c94aeb533e	660	}
IanBenzMaxim	21:00c94aeb533e	661
IanBenzMaxim	21:00c94aeb533e	662	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	663	// Use the DS2465 help command '1-Wire triplet' to perform one bit of a 1-Wire
IanBenzMaxim	21:00c94aeb533e	664	// search. This command does two read bits and one write bit. The write bit
IanBenzMaxim	21:00c94aeb533e	665	// is either the default direction (all device have same bit) or in case of
IanBenzMaxim	21:00c94aeb533e	666	// a discripancy, the 'search_direction' parameter is used.
IanBenzMaxim	21:00c94aeb533e	667	//
j3	22:686273e55cdc	668	// Returns � The DS2465 status byte result from the triplet command
IanBenzMaxim	21:00c94aeb533e	669	//
IanBenzMaxim	21:00c94aeb533e	670	OneWireMaster::CmdResult DS2465::Triplet(Direction search_direction, uint8_t & status)
IanBenzMaxim	21:00c94aeb533e	671	{
IanBenzMaxim	21:00c94aeb533e	672	int poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	673
IanBenzMaxim	21:00c94aeb533e	674	// 1-Wire Triplet (Case B)
IanBenzMaxim	21:00c94aeb533e	675	// S AD,0 [A] 1WT [A] SS [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim	21:00c94aeb533e	676	// \--------/
IanBenzMaxim	21:00c94aeb533e	677	// Repeat until 1WB bit has changed to 0
IanBenzMaxim	21:00c94aeb533e	678	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	679	// SS indicates byte containing search direction bit value in msbit
IanBenzMaxim	21:00c94aeb533e	680
IanBenzMaxim	21:00c94aeb533e	681	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	682	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	683	{
IanBenzMaxim	21:00c94aeb533e	684	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	685	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	686	}
IanBenzMaxim	21:00c94aeb533e	687	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	688	{
IanBenzMaxim	21:00c94aeb533e	689	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	690	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	691	}
IanBenzMaxim	21:00c94aeb533e	692	if (m_I2C_interface.write(CMD_1WT) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	693	{
IanBenzMaxim	21:00c94aeb533e	694	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	695	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	696	}
IanBenzMaxim	21:00c94aeb533e	697	if (m_I2C_interface.write((unsigned char)((search_direction == DIRECTION_WRITE_ONE) ? 0x80 : 0x00)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	698	{
IanBenzMaxim	21:00c94aeb533e	699	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	700	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	701	}
IanBenzMaxim	21:00c94aeb533e	702	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	703	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	704	{
IanBenzMaxim	21:00c94aeb533e	705	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	706	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	707	}
IanBenzMaxim	21:00c94aeb533e	708
IanBenzMaxim	21:00c94aeb533e	709	// loop checking 1WB bit for completion of 1-Wire operation
IanBenzMaxim	21:00c94aeb533e	710	// abort if poll limit reached
IanBenzMaxim	21:00c94aeb533e	711	status = STATUS_1WB;
IanBenzMaxim	21:00c94aeb533e	712	while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT))
IanBenzMaxim	21:00c94aeb533e	713	{
IanBenzMaxim	21:00c94aeb533e	714	status = m_I2C_interface.read(status & STATUS_1WB);
IanBenzMaxim	21:00c94aeb533e	715	}
IanBenzMaxim	21:00c94aeb533e	716
IanBenzMaxim	21:00c94aeb533e	717	// one last read with NACK
IanBenzMaxim	21:00c94aeb533e	718	m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	719
IanBenzMaxim	21:00c94aeb533e	720	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	721
IanBenzMaxim	21:00c94aeb533e	722	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	723	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	724	{
IanBenzMaxim	21:00c94aeb533e	725	// handle error
IanBenzMaxim	21:00c94aeb533e	726	// ...
IanBenzMaxim	21:00c94aeb533e	727	Reset();
IanBenzMaxim	21:00c94aeb533e	728	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	729	}
IanBenzMaxim	21:00c94aeb533e	730
IanBenzMaxim	21:00c94aeb533e	731	// return status byte
IanBenzMaxim	21:00c94aeb533e	732	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	733	}
IanBenzMaxim	21:00c94aeb533e	734
IanBenzMaxim	21:00c94aeb533e	735	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	736	// The 'OWSearch' function does a general search. This function
IanBenzMaxim	21:00c94aeb533e	737	// continues from the previos search state. The search state
IanBenzMaxim	21:00c94aeb533e	738	// can be reset by using the 'OWFirst' function.
IanBenzMaxim	21:00c94aeb533e	739	// This function contains one parameter 'alarm_only'.
IanBenzMaxim	21:00c94aeb533e	740	// When 'alarm_only' is true (1) the find alarm command
IanBenzMaxim	21:00c94aeb533e	741	// 0xEC is sent instead of the normal search command 0xF0.
IanBenzMaxim	21:00c94aeb533e	742	// Using the find alarm command 0xEC will limit the search to only
IanBenzMaxim	21:00c94aeb533e	743	// 1-Wire devices that are in an 'alarm' state.
IanBenzMaxim	21:00c94aeb533e	744	//
IanBenzMaxim	21:00c94aeb533e	745	// Returns: true (1) : when a 1-Wire device was found and it's
IanBenzMaxim	21:00c94aeb533e	746	// Serial Number placed in the global ROM
IanBenzMaxim	21:00c94aeb533e	747	// false (0): when no new device was found. Either the
IanBenzMaxim	21:00c94aeb533e	748	// last search was the last device or there
IanBenzMaxim	21:00c94aeb533e	749	// are no devices on the 1-Wire Net.
IanBenzMaxim	21:00c94aeb533e	750	//
IanBenzMaxim	21:00c94aeb533e	751	OneWireMaster::CmdResult DS2465::OWSearch(RomId & romId)
IanBenzMaxim	21:00c94aeb533e	752	{
IanBenzMaxim	21:00c94aeb533e	753	int id_bit_number;
IanBenzMaxim	21:00c94aeb533e	754	int last_zero, rom_byte_number;
IanBenzMaxim	21:00c94aeb533e	755	int id_bit, cmp_id_bit;
IanBenzMaxim	21:00c94aeb533e	756	unsigned char rom_byte_mask, status;
IanBenzMaxim	21:00c94aeb533e	757	bool search_result;
IanBenzMaxim	21:00c94aeb533e	758	unsigned char crc8 = 0;
IanBenzMaxim	21:00c94aeb533e	759	Direction search_direction;
IanBenzMaxim	21:00c94aeb533e	760
IanBenzMaxim	21:00c94aeb533e	761	// initialize for search
IanBenzMaxim	21:00c94aeb533e	762	id_bit_number = 1;
IanBenzMaxim	21:00c94aeb533e	763	last_zero = 0;
IanBenzMaxim	21:00c94aeb533e	764	rom_byte_number = 0;
IanBenzMaxim	21:00c94aeb533e	765	rom_byte_mask = 1;
IanBenzMaxim	21:00c94aeb533e	766	search_result = false;
IanBenzMaxim	21:00c94aeb533e	767
IanBenzMaxim	21:00c94aeb533e	768	// if the last call was not the last one
IanBenzMaxim	21:00c94aeb533e	769	if (!m_lastDeviceFlag)
IanBenzMaxim	21:00c94aeb533e	770	{
IanBenzMaxim	21:00c94aeb533e	771	// 1-Wire reset
IanBenzMaxim	21:00c94aeb533e	772	OneWireMaster::CmdResult result = OWReset();
IanBenzMaxim	21:00c94aeb533e	773	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	774	{
IanBenzMaxim	21:00c94aeb533e	775	// reset the search
IanBenzMaxim	21:00c94aeb533e	776	m_lastDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	777	m_lastDeviceFlag = false;
IanBenzMaxim	21:00c94aeb533e	778	m_lastFamilyDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	779	return result;
IanBenzMaxim	21:00c94aeb533e	780	}
IanBenzMaxim	21:00c94aeb533e	781
IanBenzMaxim	21:00c94aeb533e	782	// issue the search command
IanBenzMaxim	21:00c94aeb533e	783	OWWriteByte(0xF0);
IanBenzMaxim	21:00c94aeb533e	784
IanBenzMaxim	21:00c94aeb533e	785	// loop to do the search
IanBenzMaxim	21:00c94aeb533e	786	do
IanBenzMaxim	21:00c94aeb533e	787	{
IanBenzMaxim	21:00c94aeb533e	788	// if this discrepancy if before the Last Discrepancy
IanBenzMaxim	21:00c94aeb533e	789	// on a previous next then pick the same as last time
IanBenzMaxim	21:00c94aeb533e	790	if (id_bit_number < m_lastDiscrepancy)
IanBenzMaxim	21:00c94aeb533e	791	{
IanBenzMaxim	21:00c94aeb533e	792	if ((romId[rom_byte_number] & rom_byte_mask) > 0)
IanBenzMaxim	21:00c94aeb533e	793	search_direction = DIRECTION_WRITE_ONE;
IanBenzMaxim	21:00c94aeb533e	794	else
IanBenzMaxim	21:00c94aeb533e	795	search_direction = DIRECTION_WRITE_ZERO;
IanBenzMaxim	21:00c94aeb533e	796	}
IanBenzMaxim	21:00c94aeb533e	797	else
IanBenzMaxim	21:00c94aeb533e	798	{
IanBenzMaxim	21:00c94aeb533e	799	// if equal to last pick 1, if not then pick 0
IanBenzMaxim	21:00c94aeb533e	800	if (id_bit_number == m_lastDiscrepancy)
IanBenzMaxim	21:00c94aeb533e	801	search_direction = DIRECTION_WRITE_ONE;
IanBenzMaxim	21:00c94aeb533e	802	else
IanBenzMaxim	21:00c94aeb533e	803	search_direction = DIRECTION_WRITE_ZERO;
IanBenzMaxim	21:00c94aeb533e	804	}
IanBenzMaxim	21:00c94aeb533e	805
IanBenzMaxim	21:00c94aeb533e	806	// Peform a triple operation on the DS2465 which will perform 2 read bits and 1 write bit
IanBenzMaxim	21:00c94aeb533e	807	Triplet(search_direction, status);
IanBenzMaxim	21:00c94aeb533e	808
IanBenzMaxim	21:00c94aeb533e	809	// check bit results in status byte
IanBenzMaxim	21:00c94aeb533e	810	id_bit = ((status & STATUS_SBR) == STATUS_SBR);
IanBenzMaxim	21:00c94aeb533e	811	cmp_id_bit = ((status & STATUS_TSB) == STATUS_TSB);
IanBenzMaxim	21:00c94aeb533e	812	search_direction = ((status & STATUS_DIR) == STATUS_DIR) ? DIRECTION_WRITE_ONE : DIRECTION_WRITE_ZERO;
IanBenzMaxim	21:00c94aeb533e	813
IanBenzMaxim	21:00c94aeb533e	814	// check for no devices on 1-wire
IanBenzMaxim	21:00c94aeb533e	815	if ((id_bit) && (cmp_id_bit))
IanBenzMaxim	21:00c94aeb533e	816	break;
IanBenzMaxim	21:00c94aeb533e	817	else
IanBenzMaxim	21:00c94aeb533e	818	{
IanBenzMaxim	21:00c94aeb533e	819	if ((!id_bit) && (!cmp_id_bit) && (search_direction == DIRECTION_WRITE_ZERO))
IanBenzMaxim	21:00c94aeb533e	820	{
IanBenzMaxim	21:00c94aeb533e	821	last_zero = id_bit_number;
IanBenzMaxim	21:00c94aeb533e	822
IanBenzMaxim	21:00c94aeb533e	823	// check for Last discrepancy in family
IanBenzMaxim	21:00c94aeb533e	824	if (last_zero < 9)
IanBenzMaxim	21:00c94aeb533e	825	m_lastFamilyDiscrepancy = last_zero;
IanBenzMaxim	21:00c94aeb533e	826	}
IanBenzMaxim	21:00c94aeb533e	827
IanBenzMaxim	21:00c94aeb533e	828	// set or clear the bit in the ROM byte rom_byte_number
IanBenzMaxim	21:00c94aeb533e	829	// with mask rom_byte_mask
IanBenzMaxim	21:00c94aeb533e	830	if (search_direction == DIRECTION_WRITE_ONE)
IanBenzMaxim	21:00c94aeb533e	831	romId[rom_byte_number] \|= rom_byte_mask;
IanBenzMaxim	21:00c94aeb533e	832	else
IanBenzMaxim	21:00c94aeb533e	833	romId[rom_byte_number] &= (unsigned char)~rom_byte_mask;
IanBenzMaxim	21:00c94aeb533e	834
IanBenzMaxim	21:00c94aeb533e	835	// increment the byte counter id_bit_number
IanBenzMaxim	21:00c94aeb533e	836	// and shift the mask rom_byte_mask
IanBenzMaxim	21:00c94aeb533e	837	id_bit_number++;
IanBenzMaxim	21:00c94aeb533e	838	rom_byte_mask <<= 1;
IanBenzMaxim	21:00c94aeb533e	839
IanBenzMaxim	21:00c94aeb533e	840	// if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask
IanBenzMaxim	21:00c94aeb533e	841	if (rom_byte_mask == 0)
IanBenzMaxim	21:00c94aeb533e	842	{
IanBenzMaxim	21:00c94aeb533e	843	crc8 = RomId::calculateCRC8(crc8, romId[rom_byte_number]); // accumulate the CRC
IanBenzMaxim	21:00c94aeb533e	844	rom_byte_number++;
IanBenzMaxim	21:00c94aeb533e	845	rom_byte_mask = 1;
IanBenzMaxim	21:00c94aeb533e	846	}
IanBenzMaxim	21:00c94aeb533e	847	}
IanBenzMaxim	21:00c94aeb533e	848	}
IanBenzMaxim	21:00c94aeb533e	849	while(rom_byte_number < RomId::byteLen); // loop until through all ROM bytes 0-7
IanBenzMaxim	21:00c94aeb533e	850
IanBenzMaxim	21:00c94aeb533e	851	// if the search was successful then
IanBenzMaxim	21:00c94aeb533e	852	if (!((id_bit_number <= (RomId::byteLen * 8)) \|\| (crc8 != 0)))
IanBenzMaxim	21:00c94aeb533e	853	{
IanBenzMaxim	21:00c94aeb533e	854	// search successful so set m_lastDiscrepancy,m_lastDeviceFlag,search_result
IanBenzMaxim	21:00c94aeb533e	855	m_lastDiscrepancy = last_zero;
IanBenzMaxim	21:00c94aeb533e	856
IanBenzMaxim	21:00c94aeb533e	857	// check for last device
IanBenzMaxim	21:00c94aeb533e	858	if (m_lastDiscrepancy == 0)
IanBenzMaxim	21:00c94aeb533e	859	m_lastDeviceFlag = true;
IanBenzMaxim	21:00c94aeb533e	860
IanBenzMaxim	21:00c94aeb533e	861	search_result = true;
IanBenzMaxim	21:00c94aeb533e	862	}
IanBenzMaxim	21:00c94aeb533e	863	}
IanBenzMaxim	21:00c94aeb533e	864
IanBenzMaxim	21:00c94aeb533e	865	// if no device found then reset counters so next 'search' will be like a first
IanBenzMaxim	21:00c94aeb533e	866	if (!search_result \|\| (romId.familyCode() == 0))
IanBenzMaxim	21:00c94aeb533e	867	{
IanBenzMaxim	21:00c94aeb533e	868	m_lastDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	869	m_lastDeviceFlag = false;
IanBenzMaxim	21:00c94aeb533e	870	m_lastFamilyDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	871	search_result = false;
IanBenzMaxim	21:00c94aeb533e	872	}
IanBenzMaxim	21:00c94aeb533e	873
IanBenzMaxim	21:00c94aeb533e	874	return search_result ? OneWireMaster::Success : OneWireMaster::OperationFailure;
IanBenzMaxim	21:00c94aeb533e	875	}
IanBenzMaxim	21:00c94aeb533e	876
IanBenzMaxim	21:00c94aeb533e	877	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	878	// Find the 'first' devices on the 1-Wire network
IanBenzMaxim	21:00c94aeb533e	879	// Return true : device found, ROM number in ROM_NO buffer
IanBenzMaxim	21:00c94aeb533e	880	// false : no device present
IanBenzMaxim	21:00c94aeb533e	881	//
IanBenzMaxim	21:00c94aeb533e	882	OneWireMaster::CmdResult DS2465::OWFirst(RomId & romId)
IanBenzMaxim	21:00c94aeb533e	883	{
IanBenzMaxim	21:00c94aeb533e	884	// reset the search state
IanBenzMaxim	21:00c94aeb533e	885	m_lastDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	886	m_lastDeviceFlag = false;
IanBenzMaxim	21:00c94aeb533e	887	m_lastFamilyDiscrepancy = 0;
IanBenzMaxim	21:00c94aeb533e	888
IanBenzMaxim	21:00c94aeb533e	889	return OWSearch(romId);
IanBenzMaxim	21:00c94aeb533e	890	}
IanBenzMaxim	21:00c94aeb533e	891
IanBenzMaxim	21:00c94aeb533e	892	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	893	// The 'OWReadBlock' receives a block of data from the
IanBenzMaxim	21:00c94aeb533e	894	// 1-Wire Net. The destination is the mac buffer (rx_mac=1) or
IanBenzMaxim	21:00c94aeb533e	895	// the scratchpad (rx_mac=0). The result is buffer is returned.
IanBenzMaxim	21:00c94aeb533e	896	//
IanBenzMaxim	21:00c94aeb533e	897	// 'rx_buf' - pointer to a block to receive bytes
IanBenzMaxim	21:00c94aeb533e	898	// of length 'rx_len' from 1-Wire Net
IanBenzMaxim	21:00c94aeb533e	899	// 'rx_len' - length in bytes to read. Only valid numbers are 8,16,20,32;
IanBenzMaxim	21:00c94aeb533e	900	//
IanBenzMaxim	21:00c94aeb533e	901	OneWireMaster::CmdResult DS2465::OWReadBlock(uint8_t *rx_buf, uint8_t rx_len)
IanBenzMaxim	21:00c94aeb533e	902	{
IanBenzMaxim	21:00c94aeb533e	903	uint8_t status;
IanBenzMaxim	21:00c94aeb533e	904	int poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	905	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	906
IanBenzMaxim	21:00c94aeb533e	907	// 1-Wire Receive Block (Case A)
IanBenzMaxim	21:00c94aeb533e	908	// S AD,0 [A] ADDR_CMD_REG [A] 1WRF [A] PR [A] P
IanBenzMaxim	21:00c94aeb533e	909	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	910	// PR indicates byte containing parameter
IanBenzMaxim	21:00c94aeb533e	911
IanBenzMaxim	21:00c94aeb533e	912	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	913	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	914	{
IanBenzMaxim	21:00c94aeb533e	915	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	916	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	917	}
IanBenzMaxim	21:00c94aeb533e	918	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	919	{
IanBenzMaxim	21:00c94aeb533e	920	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	921	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	922	}
IanBenzMaxim	21:00c94aeb533e	923	if (m_I2C_interface.write(CMD_1WRF) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	924	{
IanBenzMaxim	21:00c94aeb533e	925	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	926	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	927	}
IanBenzMaxim	21:00c94aeb533e	928	if (m_I2C_interface.write((unsigned char)rx_len) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	929	{
IanBenzMaxim	21:00c94aeb533e	930	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	931	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	932	}
IanBenzMaxim	21:00c94aeb533e	933	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	934	status = STATUS_1WB;
IanBenzMaxim	21:00c94aeb533e	935
IanBenzMaxim	21:00c94aeb533e	936	// loop checking 1WB bit for completion of 1-Wire operation
IanBenzMaxim	21:00c94aeb533e	937	// abort if poll limit reached
IanBenzMaxim	21:00c94aeb533e	938	while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT))
IanBenzMaxim	21:00c94aeb533e	939	{
IanBenzMaxim	21:00c94aeb533e	940	result = ReadMemory(ADDR_STATUS_REG, &status, 1, false);
IanBenzMaxim	21:00c94aeb533e	941	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	942	return result;
IanBenzMaxim	21:00c94aeb533e	943	}
IanBenzMaxim	21:00c94aeb533e	944
IanBenzMaxim	21:00c94aeb533e	945	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	946	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	947	{
IanBenzMaxim	21:00c94aeb533e	948	// handle error
IanBenzMaxim	21:00c94aeb533e	949	// ...
IanBenzMaxim	21:00c94aeb533e	950	//Reset();
IanBenzMaxim	21:00c94aeb533e	951	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	952	}
IanBenzMaxim	21:00c94aeb533e	953
IanBenzMaxim	21:00c94aeb533e	954	result = ReadMemory(ADDR_SPAD, rx_buf, rx_len, false);
IanBenzMaxim	21:00c94aeb533e	955
IanBenzMaxim	21:00c94aeb533e	956	// read out the data
IanBenzMaxim	21:00c94aeb533e	957	return result;
IanBenzMaxim	21:00c94aeb533e	958	}
IanBenzMaxim	21:00c94aeb533e	959
IanBenzMaxim	21:00c94aeb533e	960
IanBenzMaxim	21:00c94aeb533e	961
IanBenzMaxim	21:00c94aeb533e	962
IanBenzMaxim	21:00c94aeb533e	963	OneWireMaster::CmdResult DS2465::OWWriteBlock(const uint8_t *tran_buf, uint8_t tran_len)
IanBenzMaxim	21:00c94aeb533e	964	{
IanBenzMaxim	21:00c94aeb533e	965	return OWWriteBlock(false, tran_buf, tran_len);
IanBenzMaxim	21:00c94aeb533e	966	}
IanBenzMaxim	21:00c94aeb533e	967
IanBenzMaxim	21:00c94aeb533e	968	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	969	// The 'OWWriteBlock' transfers a block of data to the
IanBenzMaxim	21:00c94aeb533e	970	// 1-Wire Net. The mac buffer can be sent (tx_mac=1) or a
IanBenzMaxim	21:00c94aeb533e	971	// portion of the scratchpad can be sent.
IanBenzMaxim	21:00c94aeb533e	972	//
IanBenzMaxim	21:00c94aeb533e	973	// 'tx_mac' - flag to indicate if the MAC buffer is to be sent (1) or
IanBenzMaxim	21:00c94aeb533e	974	// the data provided in teh tran_buf is to be sent (0)
IanBenzMaxim	21:00c94aeb533e	975	// 'tran_buf' - pointer to a block of bytes
IanBenzMaxim	21:00c94aeb533e	976	// of length 'tran_len' that will be sent
IanBenzMaxim	21:00c94aeb533e	977	// to the 1-Wire Net
IanBenzMaxim	21:00c94aeb533e	978	// 'tran_len' - length in bytes to transfer. Only valid numbers are 8,16,20,32;
IanBenzMaxim	21:00c94aeb533e	979	//
IanBenzMaxim	21:00c94aeb533e	980	OneWireMaster::CmdResult DS2465::OWWriteBlock(bool tx_mac, const uint8_t *tran_buf, uint8_t tran_len)
IanBenzMaxim	21:00c94aeb533e	981	{
IanBenzMaxim	21:00c94aeb533e	982	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	983	uint8_t par, status;
IanBenzMaxim	21:00c94aeb533e	984	int poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	985
IanBenzMaxim	21:00c94aeb533e	986	// create parameter byte
IanBenzMaxim	21:00c94aeb533e	987	if (tx_mac)
IanBenzMaxim	21:00c94aeb533e	988	par = 0xFF;
IanBenzMaxim	21:00c94aeb533e	989	else
IanBenzMaxim	21:00c94aeb533e	990	{
IanBenzMaxim	21:00c94aeb533e	991	// scratchpad is source
IanBenzMaxim	21:00c94aeb533e	992	par = tran_len;
IanBenzMaxim	21:00c94aeb533e	993
IanBenzMaxim	21:00c94aeb533e	994	// prefill scratchpad with required data
IanBenzMaxim	21:00c94aeb533e	995	result = WriteScratchpad(ADDR_SPAD, tran_buf, tran_len);
IanBenzMaxim	21:00c94aeb533e	996	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	997	return result;
IanBenzMaxim	21:00c94aeb533e	998	}
IanBenzMaxim	21:00c94aeb533e	999
IanBenzMaxim	21:00c94aeb533e	1000	// 1-Wire Transmit Block (Case A)
IanBenzMaxim	21:00c94aeb533e	1001	// S AD,0 [A] ADDR_CMD_REG [A] 1WTB [A] PR [A] P
IanBenzMaxim	21:00c94aeb533e	1002	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1003	// PR indicates byte containing parameter
IanBenzMaxim	21:00c94aeb533e	1004
IanBenzMaxim	21:00c94aeb533e	1005	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1006	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1007	{
IanBenzMaxim	21:00c94aeb533e	1008	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1009	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1010	}
IanBenzMaxim	21:00c94aeb533e	1011	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1012	{
IanBenzMaxim	21:00c94aeb533e	1013	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1014	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1015	}
IanBenzMaxim	21:00c94aeb533e	1016	if (m_I2C_interface.write(CMD_1WTB) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1017	{
IanBenzMaxim	21:00c94aeb533e	1018	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1019	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1020	}
IanBenzMaxim	21:00c94aeb533e	1021	if (m_I2C_interface.write(par) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1022	{
IanBenzMaxim	21:00c94aeb533e	1023	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1024	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1025	}
IanBenzMaxim	21:00c94aeb533e	1026	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1027
IanBenzMaxim	21:00c94aeb533e	1028	// loop checking 1WB bit for completion of 1-Wire operation
IanBenzMaxim	21:00c94aeb533e	1029	// abort if poll limit reached
IanBenzMaxim	21:00c94aeb533e	1030	status = STATUS_1WB;
IanBenzMaxim	21:00c94aeb533e	1031	while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT))
IanBenzMaxim	21:00c94aeb533e	1032	{
IanBenzMaxim	21:00c94aeb533e	1033	result = ReadMemory(ADDR_STATUS_REG, &status, 1, false);
IanBenzMaxim	21:00c94aeb533e	1034	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	1035	return result;
IanBenzMaxim	21:00c94aeb533e	1036	}
IanBenzMaxim	21:00c94aeb533e	1037
IanBenzMaxim	21:00c94aeb533e	1038	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	1039	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	1040	{
IanBenzMaxim	21:00c94aeb533e	1041	// handle error
IanBenzMaxim	21:00c94aeb533e	1042	// ...
IanBenzMaxim	21:00c94aeb533e	1043	//Reset();
IanBenzMaxim	21:00c94aeb533e	1044	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	1045	}
IanBenzMaxim	21:00c94aeb533e	1046
IanBenzMaxim	21:00c94aeb533e	1047	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1048	}
IanBenzMaxim	21:00c94aeb533e	1049
IanBenzMaxim	21:00c94aeb533e	1050	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1051	// The 'OWBlock' transfers a block of data to and from the
IanBenzMaxim	21:00c94aeb533e	1052	// 1-Wire Net. The result is returned in the same buffer.
IanBenzMaxim	21:00c94aeb533e	1053	//
IanBenzMaxim	21:00c94aeb533e	1054	// 'tran_buf' - pointer to a block of unsigned
IanBenzMaxim	21:00c94aeb533e	1055	// chars of length 'tran_len' that will be sent
IanBenzMaxim	21:00c94aeb533e	1056	// to the 1-Wire Net
IanBenzMaxim	21:00c94aeb533e	1057	// 'tran_len' - length in bytes to transfer
IanBenzMaxim	21:00c94aeb533e	1058	//
IanBenzMaxim	21:00c94aeb533e	1059	OneWireMaster::CmdResult DS2465::OWBlock(uint8_t *tran_buf, uint8_t tran_len)
IanBenzMaxim	21:00c94aeb533e	1060	{
IanBenzMaxim	21:00c94aeb533e	1061	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	1062	for (uint8_t i = 0; i < tran_len; i++)
IanBenzMaxim	21:00c94aeb533e	1063	{
IanBenzMaxim	21:00c94aeb533e	1064	result = OWTouchByte(tran_buf[i]);
IanBenzMaxim	21:00c94aeb533e	1065	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	1066	break;
IanBenzMaxim	21:00c94aeb533e	1067	}
IanBenzMaxim	21:00c94aeb533e	1068	return result;
IanBenzMaxim	21:00c94aeb533e	1069	}
IanBenzMaxim	21:00c94aeb533e	1070
IanBenzMaxim	21:00c94aeb533e	1071	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1072	// Send 8 bits of communication to the 1-Wire Net and return the
IanBenzMaxim	21:00c94aeb533e	1073	// result 8 bits read from the 1-Wire Net. The parameter 'sendbyte'
IanBenzMaxim	21:00c94aeb533e	1074	// least significant 8 bits are used and the least significant 8 bits
IanBenzMaxim	21:00c94aeb533e	1075	// of the result is the return byte.
IanBenzMaxim	21:00c94aeb533e	1076	//
IanBenzMaxim	21:00c94aeb533e	1077	// 'sendbyte' - 8 bits to send (least significant byte)
IanBenzMaxim	21:00c94aeb533e	1078	//
IanBenzMaxim	21:00c94aeb533e	1079	// Returns: 8 bits read from sendbyte
IanBenzMaxim	21:00c94aeb533e	1080	//
IanBenzMaxim	21:00c94aeb533e	1081	OneWireMaster::CmdResult DS2465::OWTouchByte(uint8_t & sendrecvbyte)
IanBenzMaxim	21:00c94aeb533e	1082	{
IanBenzMaxim	21:00c94aeb533e	1083	OneWireMaster::CmdResult result = OWWriteByte(sendrecvbyte);
IanBenzMaxim	21:00c94aeb533e	1084	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	1085	OWReadByte(sendrecvbyte);
IanBenzMaxim	21:00c94aeb533e	1086	return result;
IanBenzMaxim	21:00c94aeb533e	1087	}
IanBenzMaxim	21:00c94aeb533e	1088
IanBenzMaxim	21:00c94aeb533e	1089	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1090	// Send 8 bits of read communication to the 1-Wire Net and return the
IanBenzMaxim	21:00c94aeb533e	1091	// result 8 bits read from the 1-Wire Net.
IanBenzMaxim	21:00c94aeb533e	1092	//
IanBenzMaxim	21:00c94aeb533e	1093	// Returns: 8 bits read from 1-Wire Net
IanBenzMaxim	21:00c94aeb533e	1094	//
IanBenzMaxim	21:00c94aeb533e	1095	OneWireMaster::CmdResult DS2465::OWReadByte(uint8_t & recvbyte)
IanBenzMaxim	21:00c94aeb533e	1096	{
IanBenzMaxim	21:00c94aeb533e	1097	uint8_t status;
IanBenzMaxim	21:00c94aeb533e	1098	int poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	1099
IanBenzMaxim	21:00c94aeb533e	1100	// 1-Wire Read Bytes (Case C)
j3	22:686273e55cdc	1101	// S AD,0 [A] ADDR_CMD_REG [A] 1WRB [A] Sr AD,1 [A] [Status] A [Status] A
IanBenzMaxim	21:00c94aeb533e	1102	// \--------/
IanBenzMaxim	21:00c94aeb533e	1103	// Repeat until 1WB bit has changed to 0
IanBenzMaxim	21:00c94aeb533e	1104	// Sr AD,0 [A] SRP [A] E1 [A] Sr AD,1 [A] DD A\ P
IanBenzMaxim	21:00c94aeb533e	1105	//
IanBenzMaxim	21:00c94aeb533e	1106	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1107	// DD data read
IanBenzMaxim	21:00c94aeb533e	1108
IanBenzMaxim	21:00c94aeb533e	1109	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1110	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1111	{
IanBenzMaxim	21:00c94aeb533e	1112	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1113	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1114	}
IanBenzMaxim	21:00c94aeb533e	1115	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1116	{
IanBenzMaxim	21:00c94aeb533e	1117	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1118	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1119	}
IanBenzMaxim	21:00c94aeb533e	1120	if (m_I2C_interface.write(CMD_1WRB) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1121	{
IanBenzMaxim	21:00c94aeb533e	1122	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1123	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1124	}
IanBenzMaxim	21:00c94aeb533e	1125	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1126	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1127	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1128
IanBenzMaxim	21:00c94aeb533e	1129	// loop checking 1WB bit for completion of 1-Wire operation
IanBenzMaxim	21:00c94aeb533e	1130	// abort if poll limit reached
IanBenzMaxim	21:00c94aeb533e	1131	status = STATUS_1WB;
IanBenzMaxim	21:00c94aeb533e	1132	while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT))
IanBenzMaxim	21:00c94aeb533e	1133	{
IanBenzMaxim	21:00c94aeb533e	1134	status = m_I2C_interface.read(m_I2C_interface.ACK);
IanBenzMaxim	21:00c94aeb533e	1135	}
IanBenzMaxim	21:00c94aeb533e	1136
IanBenzMaxim	21:00c94aeb533e	1137	// one last read with NACK
IanBenzMaxim	21:00c94aeb533e	1138	m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	1139
IanBenzMaxim	21:00c94aeb533e	1140	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	1141	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	1142	{
IanBenzMaxim	21:00c94aeb533e	1143	// handle error
IanBenzMaxim	21:00c94aeb533e	1144	// ...
IanBenzMaxim	21:00c94aeb533e	1145	//Reset();
IanBenzMaxim	21:00c94aeb533e	1146	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	1147	}
IanBenzMaxim	21:00c94aeb533e	1148
IanBenzMaxim	21:00c94aeb533e	1149	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1150	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1151	{
IanBenzMaxim	21:00c94aeb533e	1152	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1153	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1154	}
IanBenzMaxim	21:00c94aeb533e	1155	if (m_I2C_interface.write(ADDR_DATA_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1156	{
IanBenzMaxim	21:00c94aeb533e	1157	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1158	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1159	}
IanBenzMaxim	21:00c94aeb533e	1160	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1161	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1162	{
IanBenzMaxim	21:00c94aeb533e	1163	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1164	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1165	}
IanBenzMaxim	21:00c94aeb533e	1166	recvbyte = m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	1167
IanBenzMaxim	21:00c94aeb533e	1168	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1169
IanBenzMaxim	21:00c94aeb533e	1170	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1171	}
IanBenzMaxim	21:00c94aeb533e	1172
IanBenzMaxim	21:00c94aeb533e	1173	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1174	// Send 8 bits of communication to the 1-Wire Net and verify that the
IanBenzMaxim	21:00c94aeb533e	1175	// 8 bits read from the 1-Wire Net is the same (write operation).
IanBenzMaxim	21:00c94aeb533e	1176	// The parameter 'sendbyte' least significant 8 bits are used.
IanBenzMaxim	21:00c94aeb533e	1177	//
IanBenzMaxim	21:00c94aeb533e	1178	// 'sendbyte' - 8 bits to send (least significant byte)
IanBenzMaxim	21:00c94aeb533e	1179	//
IanBenzMaxim	21:00c94aeb533e	1180	// Returns: true: bytes written and echo was the same
IanBenzMaxim	21:00c94aeb533e	1181	// false: echo was not the same
IanBenzMaxim	21:00c94aeb533e	1182	//
IanBenzMaxim	21:00c94aeb533e	1183	OneWireMaster::CmdResult DS2465::OWWriteByte(uint8_t sendbyte)
IanBenzMaxim	21:00c94aeb533e	1184	{
IanBenzMaxim	21:00c94aeb533e	1185	uint8_t status;
IanBenzMaxim	21:00c94aeb533e	1186	int poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	1187
IanBenzMaxim	21:00c94aeb533e	1188	// 1-Wire Write Byte (Case B)
IanBenzMaxim	21:00c94aeb533e	1189	// S AD,0 [A] ADDR_CMD_REG [A] 1WWB [A] DD [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim	21:00c94aeb533e	1190	// \--------/
IanBenzMaxim	21:00c94aeb533e	1191	// Repeat until 1WB bit has changed to 0
IanBenzMaxim	21:00c94aeb533e	1192	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1193	// DD data to write
IanBenzMaxim	21:00c94aeb533e	1194
IanBenzMaxim	21:00c94aeb533e	1195	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1196	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1197	{
IanBenzMaxim	21:00c94aeb533e	1198	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1199	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1200	}
IanBenzMaxim	21:00c94aeb533e	1201	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1202	{
IanBenzMaxim	21:00c94aeb533e	1203	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1204	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1205	}
IanBenzMaxim	21:00c94aeb533e	1206	if (m_I2C_interface.write(CMD_1WWB) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1207	{
IanBenzMaxim	21:00c94aeb533e	1208	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1209	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1210	}
IanBenzMaxim	21:00c94aeb533e	1211	if (m_I2C_interface.write(sendbyte) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1212	{
IanBenzMaxim	21:00c94aeb533e	1213	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1214	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1215	}
IanBenzMaxim	21:00c94aeb533e	1216
IanBenzMaxim	21:00c94aeb533e	1217	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1218	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1219	{
IanBenzMaxim	21:00c94aeb533e	1220	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1221	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1222	}
IanBenzMaxim	21:00c94aeb533e	1223
IanBenzMaxim	21:00c94aeb533e	1224	// loop checking 1WB bit for completion of 1-Wire operation
IanBenzMaxim	21:00c94aeb533e	1225	// abort if poll limit reached
IanBenzMaxim	21:00c94aeb533e	1226	status = STATUS_1WB;
IanBenzMaxim	21:00c94aeb533e	1227	while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT))
IanBenzMaxim	21:00c94aeb533e	1228	{
IanBenzMaxim	21:00c94aeb533e	1229	status = m_I2C_interface.read(m_I2C_interface.ACK);
IanBenzMaxim	21:00c94aeb533e	1230	}
IanBenzMaxim	21:00c94aeb533e	1231
IanBenzMaxim	21:00c94aeb533e	1232	// one last read with NACK
IanBenzMaxim	21:00c94aeb533e	1233	m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	1234
IanBenzMaxim	21:00c94aeb533e	1235	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1236
IanBenzMaxim	21:00c94aeb533e	1237	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	1238	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	1239	{
IanBenzMaxim	21:00c94aeb533e	1240	// handle error
IanBenzMaxim	21:00c94aeb533e	1241	// ...
IanBenzMaxim	21:00c94aeb533e	1242	//Reset();
IanBenzMaxim	21:00c94aeb533e	1243	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	1244	}
IanBenzMaxim	21:00c94aeb533e	1245
IanBenzMaxim	21:00c94aeb533e	1246	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1247	}
IanBenzMaxim	21:00c94aeb533e	1248
IanBenzMaxim	21:00c94aeb533e	1249	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1250	// Send 1 bit of communication to the 1-Wire Net and return the
IanBenzMaxim	21:00c94aeb533e	1251	// result 1 bit read from the 1-Wire Net. The parameter 'sendbit'
IanBenzMaxim	21:00c94aeb533e	1252	// least significant bit is used and the least significant bit
IanBenzMaxim	21:00c94aeb533e	1253	// of the result is the return bit.
IanBenzMaxim	21:00c94aeb533e	1254	//
IanBenzMaxim	21:00c94aeb533e	1255	// 'sendbit' - the least significant bit is the bit to send
IanBenzMaxim	21:00c94aeb533e	1256	//
IanBenzMaxim	21:00c94aeb533e	1257	// Returns: 0: 0 bit read from sendbit
IanBenzMaxim	21:00c94aeb533e	1258	// 1: 1 bit read from sendbit
IanBenzMaxim	21:00c94aeb533e	1259	//
IanBenzMaxim	21:00c94aeb533e	1260	OneWireMaster::CmdResult DS2465::OWTouchBit(uint8_t & sendrecvbit)
IanBenzMaxim	21:00c94aeb533e	1261	{
IanBenzMaxim	21:00c94aeb533e	1262	unsigned char status;
IanBenzMaxim	21:00c94aeb533e	1263	int poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	1264
IanBenzMaxim	21:00c94aeb533e	1265	// 1-Wire bit (Case B)
IanBenzMaxim	21:00c94aeb533e	1266	// S AD,0 [A] ADDR_CMD_REG [A] 1WSB [A] BB [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim	21:00c94aeb533e	1267	// \--------/
IanBenzMaxim	21:00c94aeb533e	1268	// Repeat until 1WB bit has changed to 0
IanBenzMaxim	21:00c94aeb533e	1269	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1270	// BB indicates byte containing bit value in msbit
IanBenzMaxim	21:00c94aeb533e	1271
IanBenzMaxim	21:00c94aeb533e	1272	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1273	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1274	{
IanBenzMaxim	21:00c94aeb533e	1275	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1276	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1277	}
IanBenzMaxim	21:00c94aeb533e	1278	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1279	{
IanBenzMaxim	21:00c94aeb533e	1280	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1281	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1282	}
IanBenzMaxim	21:00c94aeb533e	1283	if (m_I2C_interface.write(CMD_1WSB) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1284	{
IanBenzMaxim	21:00c94aeb533e	1285	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1286	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1287	}
IanBenzMaxim	21:00c94aeb533e	1288	if (m_I2C_interface.write(sendrecvbit ? 0x80 : 0x00) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1289	{
IanBenzMaxim	21:00c94aeb533e	1290	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1291	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1292	}
IanBenzMaxim	21:00c94aeb533e	1293	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1294	if (m_I2C_interface.write(m_I2C_address \| I2C_READ) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1295	{
IanBenzMaxim	21:00c94aeb533e	1296	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1297	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1298	}
IanBenzMaxim	21:00c94aeb533e	1299
IanBenzMaxim	21:00c94aeb533e	1300	// loop checking 1WB bit for completion of 1-Wire operation
IanBenzMaxim	21:00c94aeb533e	1301	// abort if poll limit reached
IanBenzMaxim	21:00c94aeb533e	1302	status = STATUS_1WB;
IanBenzMaxim	21:00c94aeb533e	1303	while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT))
IanBenzMaxim	21:00c94aeb533e	1304	{
IanBenzMaxim	21:00c94aeb533e	1305	status = m_I2C_interface.read(status & STATUS_1WB);
IanBenzMaxim	21:00c94aeb533e	1306	}
IanBenzMaxim	21:00c94aeb533e	1307
IanBenzMaxim	21:00c94aeb533e	1308	// one last read with NACK
IanBenzMaxim	21:00c94aeb533e	1309	m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	1310
IanBenzMaxim	21:00c94aeb533e	1311	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1312
IanBenzMaxim	21:00c94aeb533e	1313	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	1314	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	1315	{
IanBenzMaxim	21:00c94aeb533e	1316	// handle error
IanBenzMaxim	21:00c94aeb533e	1317	// ...
IanBenzMaxim	21:00c94aeb533e	1318	//Reset();
IanBenzMaxim	21:00c94aeb533e	1319	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	1320	}
IanBenzMaxim	21:00c94aeb533e	1321
IanBenzMaxim	21:00c94aeb533e	1322	// check bit state
IanBenzMaxim	21:00c94aeb533e	1323	sendrecvbit = (status & STATUS_SBR);
IanBenzMaxim	21:00c94aeb533e	1324
IanBenzMaxim	21:00c94aeb533e	1325	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1326	}
IanBenzMaxim	21:00c94aeb533e	1327
IanBenzMaxim	21:00c94aeb533e	1328	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1329	// Reads 1 bit of communication from the 1-Wire Net and returns the
IanBenzMaxim	21:00c94aeb533e	1330	// result
IanBenzMaxim	21:00c94aeb533e	1331	//
IanBenzMaxim	21:00c94aeb533e	1332	// Returns: 1 bit read from 1-Wire Net
IanBenzMaxim	21:00c94aeb533e	1333	//
IanBenzMaxim	21:00c94aeb533e	1334	OneWireMaster::CmdResult DS2465::OWReadBit(uint8_t & recvbit)
IanBenzMaxim	21:00c94aeb533e	1335	{
IanBenzMaxim	21:00c94aeb533e	1336	recvbit = 0x01;
IanBenzMaxim	21:00c94aeb533e	1337	return OWTouchBit(recvbit);
IanBenzMaxim	21:00c94aeb533e	1338	}
IanBenzMaxim	21:00c94aeb533e	1339
IanBenzMaxim	21:00c94aeb533e	1340	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1341	// Send 1 bit of communication to the 1-Wire Net.
IanBenzMaxim	21:00c94aeb533e	1342	// The parameter 'sendbit' least significant bit is used.
IanBenzMaxim	21:00c94aeb533e	1343	//
IanBenzMaxim	21:00c94aeb533e	1344	// 'sendbit' - 1 bit to send (least significant byte)
IanBenzMaxim	21:00c94aeb533e	1345	//
IanBenzMaxim	21:00c94aeb533e	1346	OneWireMaster::CmdResult DS2465::OWWriteBit(uint8_t sendbit)
IanBenzMaxim	21:00c94aeb533e	1347	{
IanBenzMaxim	21:00c94aeb533e	1348	return OWTouchBit(sendbit);
IanBenzMaxim	21:00c94aeb533e	1349	}
IanBenzMaxim	21:00c94aeb533e	1350
IanBenzMaxim	21:00c94aeb533e	1351	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1352	//
IanBenzMaxim	21:00c94aeb533e	1353	//
IanBenzMaxim	21:00c94aeb533e	1354	//
IanBenzMaxim	21:00c94aeb533e	1355	//
IanBenzMaxim	21:00c94aeb533e	1356	//
IanBenzMaxim	21:00c94aeb533e	1357	//
IanBenzMaxim	21:00c94aeb533e	1358	//
IanBenzMaxim	21:00c94aeb533e	1359	// Returns:
IanBenzMaxim	21:00c94aeb533e	1360	//
IanBenzMaxim	21:00c94aeb533e	1361	//
IanBenzMaxim	21:00c94aeb533e	1362	OneWireMaster::CmdResult DS2465::Write_Command_Reg(unsigned char cmd, unsigned char par, bool poll) const
IanBenzMaxim	21:00c94aeb533e	1363	{
IanBenzMaxim	21:00c94aeb533e	1364	int poll_count = 0, status;
IanBenzMaxim	21:00c94aeb533e	1365
IanBenzMaxim	21:00c94aeb533e	1366	// Generic command
IanBenzMaxim	21:00c94aeb533e	1367	// S AD,0 [A] ADDR_CMD_REG [A] CMD [A] PP [A] P
IanBenzMaxim	21:00c94aeb533e	1368	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1369	// CMD command
IanBenzMaxim	21:00c94aeb533e	1370	// PP parameter
IanBenzMaxim	21:00c94aeb533e	1371
IanBenzMaxim	21:00c94aeb533e	1372	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1373	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1374	{
IanBenzMaxim	21:00c94aeb533e	1375	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1376	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1377	}
IanBenzMaxim	21:00c94aeb533e	1378	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1379	{
IanBenzMaxim	21:00c94aeb533e	1380	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1381	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1382	}
IanBenzMaxim	21:00c94aeb533e	1383	if (m_I2C_interface.write(cmd) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1384	{
IanBenzMaxim	21:00c94aeb533e	1385	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1386	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1387	}
IanBenzMaxim	21:00c94aeb533e	1388	if (m_I2C_interface.write(par) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1389	{
IanBenzMaxim	21:00c94aeb533e	1390	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1391	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1392	}
IanBenzMaxim	21:00c94aeb533e	1393
IanBenzMaxim	21:00c94aeb533e	1394	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1395
IanBenzMaxim	21:00c94aeb533e	1396	poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	1397	if (poll)
IanBenzMaxim	21:00c94aeb533e	1398	{
IanBenzMaxim	21:00c94aeb533e	1399	// Poll for completion by checking for NAK on address
IanBenzMaxim	21:00c94aeb533e	1400	do
IanBenzMaxim	21:00c94aeb533e	1401	{
IanBenzMaxim	21:00c94aeb533e	1402	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1403	status = m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE));
IanBenzMaxim	21:00c94aeb533e	1404	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1405	} while ((status != I2C_WRITE_OK) && (poll_count++ < POLL_LIMIT));
IanBenzMaxim	21:00c94aeb533e	1406	}
IanBenzMaxim	21:00c94aeb533e	1407	else
IanBenzMaxim	21:00c94aeb533e	1408	{
IanBenzMaxim	21:00c94aeb533e	1409	// delay instead of poll, longest operation (only for SHA compute)
IanBenzMaxim	21:00c94aeb533e	1410	wait_ms(SHA_COMPUTATION_DELAY * 2);
IanBenzMaxim	21:00c94aeb533e	1411	wait_ms(8); // Additional delay
IanBenzMaxim	21:00c94aeb533e	1412	}
IanBenzMaxim	21:00c94aeb533e	1413
IanBenzMaxim	21:00c94aeb533e	1414	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	1415	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	1416	{
IanBenzMaxim	21:00c94aeb533e	1417	// handle error
IanBenzMaxim	21:00c94aeb533e	1418	// ...
IanBenzMaxim	21:00c94aeb533e	1419	//Reset();
IanBenzMaxim	21:00c94aeb533e	1420	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	1421	}
IanBenzMaxim	21:00c94aeb533e	1422
IanBenzMaxim	21:00c94aeb533e	1423	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1424	}
IanBenzMaxim	21:00c94aeb533e	1425
IanBenzMaxim	21:00c94aeb533e	1426	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1427	// Write to Scratchpad (SRAM) memory on the DS2465
IanBenzMaxim	21:00c94aeb533e	1428	//
IanBenzMaxim	21:00c94aeb533e	1429	// 'addr' - address to start writing (must be in SRAM)
IanBenzMaxim	21:00c94aeb533e	1430	// 'buf' - buffer of data to write
IanBenzMaxim	21:00c94aeb533e	1431	// 'len' - length to write
IanBenzMaxim	21:00c94aeb533e	1432	//
IanBenzMaxim	21:00c94aeb533e	1433	// Returns: true write successful
IanBenzMaxim	21:00c94aeb533e	1434	// false failure to complete write
IanBenzMaxim	21:00c94aeb533e	1435	//
IanBenzMaxim	21:00c94aeb533e	1436	OneWireMaster::CmdResult DS2465::WriteScratchpad(std::uint8_t addr, const std::uint8_t * buf, size_t bufLen) const
IanBenzMaxim	21:00c94aeb533e	1437	{
IanBenzMaxim	21:00c94aeb533e	1438	int i;
IanBenzMaxim	21:00c94aeb533e	1439
IanBenzMaxim	21:00c94aeb533e	1440	// Write SRAM (Case A)
IanBenzMaxim	21:00c94aeb533e	1441	// S AD,0 [A] VSA [A] DD [A] P
IanBenzMaxim	21:00c94aeb533e	1442	// \-----/
IanBenzMaxim	21:00c94aeb533e	1443	// Repeat for each data byte
IanBenzMaxim	21:00c94aeb533e	1444	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1445	// VSA valid SRAM memory address
IanBenzMaxim	21:00c94aeb533e	1446	// DD memory data to write
IanBenzMaxim	21:00c94aeb533e	1447
IanBenzMaxim	21:00c94aeb533e	1448	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1449	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1450	{
IanBenzMaxim	21:00c94aeb533e	1451	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1452	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1453	}
IanBenzMaxim	21:00c94aeb533e	1454	if (m_I2C_interface.write((unsigned char)addr) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1455	{
IanBenzMaxim	21:00c94aeb533e	1456	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1457	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1458	}
IanBenzMaxim	21:00c94aeb533e	1459	// loop to write each byte
IanBenzMaxim	21:00c94aeb533e	1460	for (i = 0; i < bufLen; i++)
IanBenzMaxim	21:00c94aeb533e	1461	{
IanBenzMaxim	21:00c94aeb533e	1462	if (m_I2C_interface.write(buf[i]) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1463	{
IanBenzMaxim	21:00c94aeb533e	1464	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1465	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1466	}
IanBenzMaxim	21:00c94aeb533e	1467	}
IanBenzMaxim	21:00c94aeb533e	1468	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1469
IanBenzMaxim	21:00c94aeb533e	1470	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1471	}
IanBenzMaxim	21:00c94aeb533e	1472
IanBenzMaxim	21:00c94aeb533e	1473	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1474	// Read memory from the DS2465
IanBenzMaxim	21:00c94aeb533e	1475	//
IanBenzMaxim	21:00c94aeb533e	1476	// 'addr' - address to start reading
IanBenzMaxim	21:00c94aeb533e	1477	// 'buf' - buffer to hold memory read
IanBenzMaxim	21:00c94aeb533e	1478	// 'len' - length to read
IanBenzMaxim	21:00c94aeb533e	1479	// 'skip_set_pointer' - flag to indicate to skip setting address pointer
IanBenzMaxim	21:00c94aeb533e	1480	//
IanBenzMaxim	21:00c94aeb533e	1481	// Returns: true read successful
IanBenzMaxim	21:00c94aeb533e	1482	// false failure to complete read
IanBenzMaxim	21:00c94aeb533e	1483	//
IanBenzMaxim	21:00c94aeb533e	1484	OneWireMaster::CmdResult DS2465::ReadMemory(std::uint8_t addr, std::uint8_t * buf, size_t bufLen, bool skip_set_pointer) const
IanBenzMaxim	21:00c94aeb533e	1485	{
IanBenzMaxim	21:00c94aeb533e	1486	int i;
IanBenzMaxim	21:00c94aeb533e	1487
IanBenzMaxim	21:00c94aeb533e	1488	// Read (Case A)
IanBenzMaxim	21:00c94aeb533e	1489	// S AD,0 [A] MA [A] Sr AD,1 [A] [DD] A [DD] A\ P
IanBenzMaxim	21:00c94aeb533e	1490	// \-----/
IanBenzMaxim	21:00c94aeb533e	1491	// Repeat for each data byte, NAK last byte
IanBenzMaxim	21:00c94aeb533e	1492	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1493	// MA memory address
IanBenzMaxim	21:00c94aeb533e	1494	// DD memory data read
IanBenzMaxim	21:00c94aeb533e	1495
IanBenzMaxim	21:00c94aeb533e	1496	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1497	if (!skip_set_pointer)
IanBenzMaxim	21:00c94aeb533e	1498	{
IanBenzMaxim	21:00c94aeb533e	1499	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1500	{
IanBenzMaxim	21:00c94aeb533e	1501	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1502	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1503	}
IanBenzMaxim	21:00c94aeb533e	1504	if (m_I2C_interface.write((unsigned char)addr) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1505	{
IanBenzMaxim	21:00c94aeb533e	1506	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1507	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1508	}
IanBenzMaxim	21:00c94aeb533e	1509	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1510	}
IanBenzMaxim	21:00c94aeb533e	1511
IanBenzMaxim	21:00c94aeb533e	1512	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1513	{
IanBenzMaxim	21:00c94aeb533e	1514	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1515	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1516	}
IanBenzMaxim	21:00c94aeb533e	1517	// loop to read each byte, NAK last byte
IanBenzMaxim	21:00c94aeb533e	1518	for (i = 0; i < bufLen; i++)
IanBenzMaxim	21:00c94aeb533e	1519	{
IanBenzMaxim	21:00c94aeb533e	1520	buf[i] = m_I2C_interface.read((i == (bufLen - 1)) ? m_I2C_interface.NoACK : m_I2C_interface.ACK);
IanBenzMaxim	21:00c94aeb533e	1521	}
IanBenzMaxim	21:00c94aeb533e	1522	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1523
IanBenzMaxim	21:00c94aeb533e	1524	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1525	}
IanBenzMaxim	21:00c94aeb533e	1526
IanBenzMaxim	21:00c94aeb533e	1527
IanBenzMaxim	21:00c94aeb533e	1528
IanBenzMaxim	21:00c94aeb533e	1529
IanBenzMaxim	21:00c94aeb533e	1530
IanBenzMaxim	21:00c94aeb533e	1531	OneWireMaster::CmdResult DS2465::ReadOneWireConfig(OWConfigAddr addr, std::uint8_t & config) const
IanBenzMaxim	21:00c94aeb533e	1532	{
IanBenzMaxim	21:00c94aeb533e	1533	std::uint8_t buf;
IanBenzMaxim	21:00c94aeb533e	1534	OneWireMaster::CmdResult result = ReadMemory(addr, &buf, 1, false);
IanBenzMaxim	21:00c94aeb533e	1535	if (result == OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	1536	config = buf;
IanBenzMaxim	21:00c94aeb533e	1537	return result;
IanBenzMaxim	21:00c94aeb533e	1538	}
IanBenzMaxim	21:00c94aeb533e	1539
IanBenzMaxim	21:00c94aeb533e	1540
IanBenzMaxim	21:00c94aeb533e	1541
IanBenzMaxim	21:00c94aeb533e	1542
IanBenzMaxim	21:00c94aeb533e	1543
IanBenzMaxim	21:00c94aeb533e	1544	OneWireMaster::CmdResult DS2465::WriteOneWireConfig(OWConfigAddr addr, unsigned int ovr, unsigned int std)
IanBenzMaxim	21:00c94aeb533e	1545	{
IanBenzMaxim	21:00c94aeb533e	1546	std::uint8_t buf;
IanBenzMaxim	21:00c94aeb533e	1547
IanBenzMaxim	21:00c94aeb533e	1548	// convert and write value
IanBenzMaxim	21:00c94aeb533e	1549	buf = (ovr << 4) \| std;
IanBenzMaxim	21:00c94aeb533e	1550	return (WriteScratchpad(addr, &buf, 1));
IanBenzMaxim	21:00c94aeb533e	1551	}
IanBenzMaxim	21:00c94aeb533e	1552
IanBenzMaxim	21:00c94aeb533e	1553	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1554	// Write the configuration register in the DS2465. The configuration
IanBenzMaxim	21:00c94aeb533e	1555	// options are provided in the lower nibble of the provided config byte.
IanBenzMaxim	21:00c94aeb533e	1556	// The uppper nibble in bitwise inverted when written to the DS2465.
IanBenzMaxim	21:00c94aeb533e	1557	//
IanBenzMaxim	21:00c94aeb533e	1558	// Returns: true: config written and response correct
IanBenzMaxim	21:00c94aeb533e	1559	// false: response incorrect
IanBenzMaxim	21:00c94aeb533e	1560	//
IanBenzMaxim	21:00c94aeb533e	1561	OneWireMaster::CmdResult DS2465::Write_Config(uint8_t config)
IanBenzMaxim	21:00c94aeb533e	1562	{
IanBenzMaxim	21:00c94aeb533e	1563	unsigned char read_config;
IanBenzMaxim	21:00c94aeb533e	1564
IanBenzMaxim	21:00c94aeb533e	1565	// Write configuration byte
IanBenzMaxim	21:00c94aeb533e	1566	// S AD,0 [A] ADDR_WCFG_REG [A] CONIG [A] P
IanBenzMaxim	21:00c94aeb533e	1567	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1568	// CF configuration byte to write
IanBenzMaxim	21:00c94aeb533e	1569
IanBenzMaxim	21:00c94aeb533e	1570	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1571
IanBenzMaxim	21:00c94aeb533e	1572	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1573	{
IanBenzMaxim	21:00c94aeb533e	1574	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1575	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1576	}
IanBenzMaxim	21:00c94aeb533e	1577	if (m_I2C_interface.write(ADDR_WCFG_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1578	{
IanBenzMaxim	21:00c94aeb533e	1579	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1580	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1581	}
IanBenzMaxim	21:00c94aeb533e	1582	if (m_I2C_interface.write((unsigned char)(config \| (~config << 4))) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1583	{
IanBenzMaxim	21:00c94aeb533e	1584	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1585	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1586	}
IanBenzMaxim	21:00c94aeb533e	1587	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1588
IanBenzMaxim	21:00c94aeb533e	1589	// read it back to confirm
j3	22:686273e55cdc	1590	// S AD,0 [A] ADDR_WCFG_REG [A] Sr AD,1 [A] [CF] A
IanBenzMaxim	21:00c94aeb533e	1591
IanBenzMaxim	21:00c94aeb533e	1592	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1593	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1594	{
IanBenzMaxim	21:00c94aeb533e	1595	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1596	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1597	}
IanBenzMaxim	21:00c94aeb533e	1598	if (m_I2C_interface.write(ADDR_WCFG_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1599	{
IanBenzMaxim	21:00c94aeb533e	1600	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1601	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1602	}
IanBenzMaxim	21:00c94aeb533e	1603	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1604	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1605	{
IanBenzMaxim	21:00c94aeb533e	1606	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1607	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1608	}
IanBenzMaxim	21:00c94aeb533e	1609	read_config = m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	1610	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1611
IanBenzMaxim	21:00c94aeb533e	1612
IanBenzMaxim	21:00c94aeb533e	1613	// check for failure due to incorrect read back
IanBenzMaxim	21:00c94aeb533e	1614	if (config != read_config)
IanBenzMaxim	21:00c94aeb533e	1615	{
IanBenzMaxim	21:00c94aeb533e	1616	// handle error
IanBenzMaxim	21:00c94aeb533e	1617	// ...
IanBenzMaxim	21:00c94aeb533e	1618	//Reset();
IanBenzMaxim	21:00c94aeb533e	1619
IanBenzMaxim	21:00c94aeb533e	1620	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	1621	}
IanBenzMaxim	21:00c94aeb533e	1622
IanBenzMaxim	21:00c94aeb533e	1623	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1624	}
IanBenzMaxim	21:00c94aeb533e	1625
IanBenzMaxim	21:00c94aeb533e	1626	//--------------------------------------------------------------------------
IanBenzMaxim	21:00c94aeb533e	1627	// Reset all of the devices on the 1-Wire Net and return the result.
IanBenzMaxim	21:00c94aeb533e	1628	//
IanBenzMaxim	21:00c94aeb533e	1629	// Returns: true(1): presense pulse(s) detected, device(s) reset
IanBenzMaxim	21:00c94aeb533e	1630	// false(0): no presense pulses detected
IanBenzMaxim	21:00c94aeb533e	1631	//
IanBenzMaxim	21:00c94aeb533e	1632	OneWireMaster::CmdResult DS2465::OWReset(void)
IanBenzMaxim	21:00c94aeb533e	1633	{
IanBenzMaxim	21:00c94aeb533e	1634	unsigned char status;
IanBenzMaxim	21:00c94aeb533e	1635	int poll_count = 0;
IanBenzMaxim	21:00c94aeb533e	1636
IanBenzMaxim	21:00c94aeb533e	1637	// 1-Wire reset (Case B)
IanBenzMaxim	21:00c94aeb533e	1638	// S AD,0 [A] ADDR_CMD_REG [A] 1WRS [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim	21:00c94aeb533e	1639	// \--------/
IanBenzMaxim	21:00c94aeb533e	1640	// Repeat until 1WB bit has changed to 0
IanBenzMaxim	21:00c94aeb533e	1641	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1642
IanBenzMaxim	21:00c94aeb533e	1643	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1644
IanBenzMaxim	21:00c94aeb533e	1645	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1646	{
IanBenzMaxim	21:00c94aeb533e	1647	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1648	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1649	}
IanBenzMaxim	21:00c94aeb533e	1650	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1651	{
IanBenzMaxim	21:00c94aeb533e	1652	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1653	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1654	}
IanBenzMaxim	21:00c94aeb533e	1655	if (m_I2C_interface.write(CMD_1WRS) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1656	{
IanBenzMaxim	21:00c94aeb533e	1657	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1658	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1659	}
IanBenzMaxim	21:00c94aeb533e	1660	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1661	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1662	{
IanBenzMaxim	21:00c94aeb533e	1663	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1664	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1665	}
IanBenzMaxim	21:00c94aeb533e	1666
IanBenzMaxim	21:00c94aeb533e	1667	// loop checking 1WB bit for completion of 1-Wire operation
IanBenzMaxim	21:00c94aeb533e	1668	// abort if poll limit reached
IanBenzMaxim	21:00c94aeb533e	1669	status = STATUS_1WB;
IanBenzMaxim	21:00c94aeb533e	1670	while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT))
IanBenzMaxim	21:00c94aeb533e	1671	{
IanBenzMaxim	21:00c94aeb533e	1672	status = m_I2C_interface.read(m_I2C_interface.ACK);
IanBenzMaxim	21:00c94aeb533e	1673	}
IanBenzMaxim	21:00c94aeb533e	1674
IanBenzMaxim	21:00c94aeb533e	1675	// one last read with NACK
IanBenzMaxim	21:00c94aeb533e	1676	m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	1677
IanBenzMaxim	21:00c94aeb533e	1678	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1679
IanBenzMaxim	21:00c94aeb533e	1680	// check for failure due to poll limit reached
IanBenzMaxim	21:00c94aeb533e	1681	if (poll_count >= POLL_LIMIT)
IanBenzMaxim	21:00c94aeb533e	1682	{
IanBenzMaxim	21:00c94aeb533e	1683	// handle error
IanBenzMaxim	21:00c94aeb533e	1684	// ...
IanBenzMaxim	21:00c94aeb533e	1685	//Reset();
IanBenzMaxim	21:00c94aeb533e	1686	return OneWireMaster::TimeoutError;
IanBenzMaxim	21:00c94aeb533e	1687	}
IanBenzMaxim	21:00c94aeb533e	1688
IanBenzMaxim	21:00c94aeb533e	1689	// check for short condition
IanBenzMaxim	21:00c94aeb533e	1690	if (status & STATUS_SD)
IanBenzMaxim	21:00c94aeb533e	1691	short_detected = true;
IanBenzMaxim	21:00c94aeb533e	1692	else
IanBenzMaxim	21:00c94aeb533e	1693	short_detected = false;
IanBenzMaxim	21:00c94aeb533e	1694
IanBenzMaxim	21:00c94aeb533e	1695
IanBenzMaxim	21:00c94aeb533e	1696	// check for presence detect
IanBenzMaxim	21:00c94aeb533e	1697	if (status & STATUS_PPD)
IanBenzMaxim	21:00c94aeb533e	1698	return OneWireMaster::Success;
IanBenzMaxim	21:00c94aeb533e	1699	// else
IanBenzMaxim	21:00c94aeb533e	1700	return OneWireMaster::OperationFailure;
IanBenzMaxim	21:00c94aeb533e	1701	}
IanBenzMaxim	21:00c94aeb533e	1702
IanBenzMaxim	21:00c94aeb533e	1703	OneWireMaster::CmdResult DS2465::Reset(void)
IanBenzMaxim	21:00c94aeb533e	1704	{
IanBenzMaxim	21:00c94aeb533e	1705	uint8_t status;
IanBenzMaxim	21:00c94aeb533e	1706
IanBenzMaxim	21:00c94aeb533e	1707	// Device Reset
IanBenzMaxim	21:00c94aeb533e	1708	// S AD,0 [A] ADDR_CMD_REG [A] 1WMR [A] Sr AD,1 [A] [SS] A\ P
IanBenzMaxim	21:00c94aeb533e	1709	// [] indicates from slave
IanBenzMaxim	21:00c94aeb533e	1710	// SS status byte to read to verify state
IanBenzMaxim	21:00c94aeb533e	1711
IanBenzMaxim	21:00c94aeb533e	1712	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1713
IanBenzMaxim	21:00c94aeb533e	1714	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_WRITE)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1715	{
IanBenzMaxim	21:00c94aeb533e	1716	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1717	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1718	}
IanBenzMaxim	21:00c94aeb533e	1719
IanBenzMaxim	21:00c94aeb533e	1720	if (m_I2C_interface.write(ADDR_CMD_REG) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1721	{
IanBenzMaxim	21:00c94aeb533e	1722	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1723	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1724	}
IanBenzMaxim	21:00c94aeb533e	1725
IanBenzMaxim	21:00c94aeb533e	1726	if (m_I2C_interface.write(CMD_1WMR) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1727	{
IanBenzMaxim	21:00c94aeb533e	1728	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1729	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1730	}
IanBenzMaxim	21:00c94aeb533e	1731
IanBenzMaxim	21:00c94aeb533e	1732	m_I2C_interface.start();
IanBenzMaxim	21:00c94aeb533e	1733
IanBenzMaxim	21:00c94aeb533e	1734	if (m_I2C_interface.write((unsigned char)(m_I2C_address \| I2C_READ)) != I2C_WRITE_OK)
IanBenzMaxim	21:00c94aeb533e	1735	{
IanBenzMaxim	21:00c94aeb533e	1736	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1737	return OneWireMaster::CommunicationWriteError;
IanBenzMaxim	21:00c94aeb533e	1738	}
IanBenzMaxim	21:00c94aeb533e	1739
IanBenzMaxim	21:00c94aeb533e	1740	status = m_I2C_interface.read(m_I2C_interface.NoACK);
IanBenzMaxim	21:00c94aeb533e	1741
IanBenzMaxim	21:00c94aeb533e	1742	m_I2C_interface.stop();
IanBenzMaxim	21:00c94aeb533e	1743
IanBenzMaxim	21:00c94aeb533e	1744	// do a command to get 1-Wire master reset out of holding state
IanBenzMaxim	21:00c94aeb533e	1745	OWReset();
IanBenzMaxim	21:00c94aeb533e	1746
IanBenzMaxim	21:00c94aeb533e	1747	// check for failure due to incorrect read back of status
IanBenzMaxim	21:00c94aeb533e	1748	return ((status & 0xF7) == 0x10) ? OneWireMaster::Success : OneWireMaster::OperationFailure;
IanBenzMaxim	21:00c94aeb533e	1749	}
IanBenzMaxim	21:00c94aeb533e	1750
IanBenzMaxim	21:00c94aeb533e	1751	OneWireMaster::CmdResult DS2465::Detect(void)
IanBenzMaxim	21:00c94aeb533e	1752	{
IanBenzMaxim	21:00c94aeb533e	1753	OneWireMaster::CmdResult result;
IanBenzMaxim	21:00c94aeb533e	1754
IanBenzMaxim	21:00c94aeb533e	1755	// reset DS2465
IanBenzMaxim	21:00c94aeb533e	1756	result = Reset();
IanBenzMaxim	21:00c94aeb533e	1757	if (result != OneWireMaster::Success)
IanBenzMaxim	21:00c94aeb533e	1758	return result;
IanBenzMaxim	21:00c94aeb533e	1759
IanBenzMaxim	21:00c94aeb533e	1760	// default configuration
IanBenzMaxim	21:00c94aeb533e	1761	c1WS = 0;
IanBenzMaxim	21:00c94aeb533e	1762	cSPU = 0;
IanBenzMaxim	21:00c94aeb533e	1763	cPDN = 0;
IanBenzMaxim	21:00c94aeb533e	1764	cAPU = CONFIG_APU;
IanBenzMaxim	21:00c94aeb533e	1765
IanBenzMaxim	21:00c94aeb533e	1766	// write the default configuration setup
IanBenzMaxim	21:00c94aeb533e	1767	result = Write_Config(c1WS \| cSPU \| cPDN \| cAPU);
IanBenzMaxim	21:00c94aeb533e	1768	return result;
IanBenzMaxim	21:00c94aeb533e	1769	}

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Type:	Library
Created:	13 Aug 2019
Imports:	7
Forks:	0
Commits:	143
Dependents:	1
Dependencies:	0
Followers:	1

OneWire_Masters/DS2465/DS2465.cpp@22:686273e55cdc, 2016-03-21 (annotated)

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