1-Wire - 1-Wire implementation, using DS2480B controller i…

Users » pwheels » Code » 1-Wire

Paul van der Wielen / Mbed 2 deprecated 1-Wire

1-Wire implementation, using DS2480B controller interfaced with serial port, working example to read DS18B20, based on work already in progress / Dallas - Public domain code

Dependencies: mbed

mbedlnk.cpp@0:1193dbfe28e2, 2011-03-24 (annotated)

Committer:: pwheels
Date:: Thu Mar 24 17:21:29 2011 +0000
Revision:: 0:1193dbfe28e2

Who changed what in which revision?

User	Revision	Line number	New contents of line
pwheels	0:1193dbfe28e2	1	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	2	// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
pwheels	0:1193dbfe28e2	3	//
pwheels	0:1193dbfe28e2	4	// Permission is hereby granted, free of charge, to any person obtaining a
pwheels	0:1193dbfe28e2	5	// copy of this software and associated documentation files (the "Software"),
pwheels	0:1193dbfe28e2	6	// to deal in the Software without restriction, including without limitation
pwheels	0:1193dbfe28e2	7	// the rights to use, copy, modify, merge, publish, distribute, sublicense,
pwheels	0:1193dbfe28e2	8	// and/or sell copies of the Software, and to permit persons to whom the
pwheels	0:1193dbfe28e2	9	// Software is furnished to do so, subject to the following conditions:
pwheels	0:1193dbfe28e2	10	//
pwheels	0:1193dbfe28e2	11	// The above copyright notice and this permission notice shall be included
pwheels	0:1193dbfe28e2	12	// in all copies or substantial portions of the Software.
pwheels	0:1193dbfe28e2	13	//
pwheels	0:1193dbfe28e2	14	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
pwheels	0:1193dbfe28e2	15	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
pwheels	0:1193dbfe28e2	16	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
pwheels	0:1193dbfe28e2	17	// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
pwheels	0:1193dbfe28e2	18	// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
pwheels	0:1193dbfe28e2	19	// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
pwheels	0:1193dbfe28e2	20	// OTHER DEALINGS IN THE SOFTWARE.
pwheels	0:1193dbfe28e2	21	//
pwheels	0:1193dbfe28e2	22	// Except as contained in this notice, the name of Dallas Semiconductor
pwheels	0:1193dbfe28e2	23	// shall not be used except as stated in the Dallas Semiconductor
pwheels	0:1193dbfe28e2	24	// Branding Policy.
pwheels	0:1193dbfe28e2	25	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	26	//
pwheels	0:1193dbfe28e2	27	// TODO.C - COM functions required to communicate with the DS2480 based
pwheels	0:1193dbfe28e2	28	// Universal Serial Adapter 'U'. Fill in the platform specific code.
pwheels	0:1193dbfe28e2	29	//
pwheels	0:1193dbfe28e2	30	// Version: 2.00
pwheels	0:1193dbfe28e2	31	//
pwheels	0:1193dbfe28e2	32	// History: 1.00 -> 1.01 Added function msDelay.
pwheels	0:1193dbfe28e2	33	//
pwheels	0:1193dbfe28e2	34	// 1.01 -> 1.02 Changed to generic OpenCOM/CloseCOM for easier
pwheels	0:1193dbfe28e2	35	// use with other platforms.
pwheels	0:1193dbfe28e2	36	//
pwheels	0:1193dbfe28e2	37	// 1.02 -> 1.03 Removed caps in #includes for Linux capatibility
pwheels	0:1193dbfe28e2	38	// Add function msGettick()
pwheels	0:1193dbfe28e2	39	// 1.03 -> 2.00 Changed 'MLan' to 'ow'. Added support for
pwheels	0:1193dbfe28e2	40	// multiple ports.
pwheels	0:1193dbfe28e2	41	// 2.00 -> 2.10 some changes made as to allow MBED usage and multiple ports
pwheels	0:1193dbfe28e2	42	//
pwheels	0:1193dbfe28e2	43	// work to be done, evaluate functions at been removed / flagged
pwheels	0:1193dbfe28e2	44	// as text if migrate to mbed is meaningfull / needed
pwheels	0:1193dbfe28e2	45	//
pwheels	0:1193dbfe28e2	46
pwheels	0:1193dbfe28e2	47	//#include "onewire_config.h" // missing include file, handled locally now
pwheels	0:1193dbfe28e2	48
pwheels	0:1193dbfe28e2	49	#include "ownet.h"
pwheels	0:1193dbfe28e2	50	#include "mbed.h"
pwheels	0:1193dbfe28e2	51	#include <string>
pwheels	0:1193dbfe28e2	52	using namespace std;
pwheels	0:1193dbfe28e2	53
pwheels	0:1193dbfe28e2	54	#define ONEWIRE_TX p9
pwheels	0:1193dbfe28e2	55	#define ONEWIRE_RX p10
pwheels	0:1193dbfe28e2	56
pwheels	0:1193dbfe28e2	57	Serial com1( ONEWIRE_TX , ONEWIRE_RX ); // uart 1 = p13_p14, tx, rx
pwheels	0:1193dbfe28e2	58	Serial com2( ONEWIRE_TX , ONEWIRE_RX ); // uart 2 = p28_p27, tx, rx
pwheels	0:1193dbfe28e2	59	Serial com3( ONEWIRE_TX , ONEWIRE_RX ); // uart 3 = p9_p10, tx, rx
pwheels	0:1193dbfe28e2	60
pwheels	0:1193dbfe28e2	61	// exportable functions required
pwheels	0:1193dbfe28e2	62	SMALLINT OpenCOM(int,char *);
pwheels	0:1193dbfe28e2	63	SMALLINT WriteCOM(int,int,uchar *);
pwheels	0:1193dbfe28e2	64	void FlushCOM(int);
pwheels	0:1193dbfe28e2	65	int ReadCOM(int,int,uchar *);
pwheels	0:1193dbfe28e2	66	void BreakCOM(int);
pwheels	0:1193dbfe28e2	67	void SetBaudCOM(int,int);
pwheels	0:1193dbfe28e2	68	void CloseCOM(int);
pwheels	0:1193dbfe28e2	69	long msGettick(void);
pwheels	0:1193dbfe28e2	70	void msDelay(int);
pwheels	0:1193dbfe28e2	71	SMALLINT owHasPowerDelivery(int);
pwheels	0:1193dbfe28e2	72	SMALLINT owHasOverDrive(int);
pwheels	0:1193dbfe28e2	73	SMALLINT owHasProgramPulse(int);
pwheels	0:1193dbfe28e2	74	SMALLINT owWriteBytePower(int,SMALLINT);
pwheels	0:1193dbfe28e2	75	SMALLINT owReadBitPower(int,SMALLINT);
pwheels	0:1193dbfe28e2	76
pwheels	0:1193dbfe28e2	77
pwheels	0:1193dbfe28e2	78	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	79	// Attempt to open a com port. Keep the handle in ComID.
pwheels	0:1193dbfe28e2	80	// Set the starting baud rate to 9600.
pwheels	0:1193dbfe28e2	81	//
pwheels	0:1193dbfe28e2	82	// 'portnum' - number 0 to MAX_PORTNUM-1. This number provided will
pwheels	0:1193dbfe28e2	83	// be used to indicate the port number desired when calling
pwheels	0:1193dbfe28e2	84	// all other functions in this library.
pwheels	0:1193dbfe28e2	85	//
pwheels	0:1193dbfe28e2	86	// 'port_zstr' - zero terminate port name. For this platform
pwheels	0:1193dbfe28e2	87	// use format COMX where X is the port number.
pwheels	0:1193dbfe28e2	88	// NOTE: not being used by MBED
pwheels	0:1193dbfe28e2	89	//
pwheels	0:1193dbfe28e2	90	//
pwheels	0:1193dbfe28e2	91	// Returns: TRUE(1) - success, COM port opened
pwheels	0:1193dbfe28e2	92	// FALSE(0) - failure, could not open specified port
pwheels	0:1193dbfe28e2	93	//
pwheels	0:1193dbfe28e2	94	SMALLINT OpenCOM(int portnum, char *port_zstr) {
pwheels	0:1193dbfe28e2	95
pwheels	0:1193dbfe28e2	96	switch (portnum) {
pwheels	0:1193dbfe28e2	97	case 1:
pwheels	0:1193dbfe28e2	98	com1.baud( 9600);
pwheels	0:1193dbfe28e2	99	break;
pwheels	0:1193dbfe28e2	100	case 2:
pwheels	0:1193dbfe28e2	101	com2.baud( 9600);
pwheels	0:1193dbfe28e2	102	break;
pwheels	0:1193dbfe28e2	103	case 3:
pwheels	0:1193dbfe28e2	104	com3.baud( 9600);
pwheels	0:1193dbfe28e2	105	break;
pwheels	0:1193dbfe28e2	106	default:
pwheels	0:1193dbfe28e2	107	return 0;
pwheels	0:1193dbfe28e2	108	}
pwheels	0:1193dbfe28e2	109	return 1;
pwheels	0:1193dbfe28e2	110	}
pwheels	0:1193dbfe28e2	111
pwheels	0:1193dbfe28e2	112	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	113	// Attempt to open a com port. Keep the handle in ComID.
pwheels	0:1193dbfe28e2	114	// Set the starting baud rate to 9600.
pwheels	0:1193dbfe28e2	115	//
pwheels	0:1193dbfe28e2	116	// 'portnum' - number 0 to MAX_PORTNUM-1. This number provided will
pwheels	0:1193dbfe28e2	117	// be used to indicate the port number desired when calling
pwheels	0:1193dbfe28e2	118	// all other functions in this library.
pwheels	0:1193dbfe28e2	119	//
pwheels	0:1193dbfe28e2	120	//
pwheels	0:1193dbfe28e2	121	// Returns: the port number if it was successful otherwise -1
pwheels	0:1193dbfe28e2	122	//
pwheels	0:1193dbfe28e2	123	int OpenCOMEx(char *port_zstr) {
pwheels	0:1193dbfe28e2	124
pwheels	0:1193dbfe28e2	125	int portnum = -1;
pwheels	0:1193dbfe28e2	126
pwheels	0:1193dbfe28e2	127	if ( port_zstr[0] == '1') {
pwheels	0:1193dbfe28e2	128	portnum = 1;
pwheels	0:1193dbfe28e2	129	}
pwheels	0:1193dbfe28e2	130
pwheels	0:1193dbfe28e2	131	if ( port_zstr[0] == '2') {
pwheels	0:1193dbfe28e2	132	portnum = 2;
pwheels	0:1193dbfe28e2	133	}
pwheels	0:1193dbfe28e2	134
pwheels	0:1193dbfe28e2	135	if ( port_zstr[0] == '3') {
pwheels	0:1193dbfe28e2	136	portnum = 3;
pwheels	0:1193dbfe28e2	137	}
pwheels	0:1193dbfe28e2	138
pwheels	0:1193dbfe28e2	139	if(!OpenCOM(portnum, port_zstr)) {
pwheels	0:1193dbfe28e2	140	return -1;
pwheels	0:1193dbfe28e2	141	}
pwheels	0:1193dbfe28e2	142	return portnum;
pwheels	0:1193dbfe28e2	143	}
pwheels	0:1193dbfe28e2	144
pwheels	0:1193dbfe28e2	145	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	146	// Closes the connection to the port.
pwheels	0:1193dbfe28e2	147	//
pwheels	0:1193dbfe28e2	148	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	149	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	150	//
pwheels	0:1193dbfe28e2	151	void CloseCOM(int portnum) {
pwheels	0:1193dbfe28e2	152	// no need to implement, mbed doesn't support close !
pwheels	0:1193dbfe28e2	153	}
pwheels	0:1193dbfe28e2	154
pwheels	0:1193dbfe28e2	155	//---------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	156	// Flush the rx and tx buffers
pwheels	0:1193dbfe28e2	157	//
pwheels	0:1193dbfe28e2	158	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	159	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	160	//
pwheels	0:1193dbfe28e2	161	void FlushCOM(int portnum) {
pwheels	0:1193dbfe28e2	162
pwheels	0:1193dbfe28e2	163	switch (portnum) {
pwheels	0:1193dbfe28e2	164	case 1:
pwheels	0:1193dbfe28e2	165	// Flush TX & RX FIFO buffer
pwheels	0:1193dbfe28e2	166	LPC_UART1->FCR \|= 0x06;
pwheels	0:1193dbfe28e2	167	break;
pwheels	0:1193dbfe28e2	168	case 2:
pwheels	0:1193dbfe28e2	169	// Flush TX & RX FIFO buffer
pwheels	0:1193dbfe28e2	170	LPC_UART2->FCR \|= 0x06;
pwheels	0:1193dbfe28e2	171	break;
pwheels	0:1193dbfe28e2	172	case 3:
pwheels	0:1193dbfe28e2	173	// Flush TX & RX FIFO buffer
pwheels	0:1193dbfe28e2	174	LPC_UART3->FCR \|= 0x06;
pwheels	0:1193dbfe28e2	175	break;
pwheels	0:1193dbfe28e2	176	}
pwheels	0:1193dbfe28e2	177	}
pwheels	0:1193dbfe28e2	178
pwheels	0:1193dbfe28e2	179	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	180	// Write an array of bytes to the COM port, verify that it was
pwheels	0:1193dbfe28e2	181	// sent out. Assume that baud rate has been set.
pwheels	0:1193dbfe28e2	182	//
pwheels	0:1193dbfe28e2	183	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	184	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	185	// 'outlen' - number of bytes to write to COM port
pwheels	0:1193dbfe28e2	186	// 'outbuf' - pointer ot an array of bytes to write
pwheels	0:1193dbfe28e2	187	//
pwheels	0:1193dbfe28e2	188	// Returns: TRUE(1) - success
pwheels	0:1193dbfe28e2	189	// FALSE(0) - failure
pwheels	0:1193dbfe28e2	190	//
pwheels	0:1193dbfe28e2	191	SMALLINT WriteCOM(int portnum, int outlen, uchar *outbuf) {
pwheels	0:1193dbfe28e2	192
pwheels	0:1193dbfe28e2	193	//printf("port-%d\r\n",portnum);
pwheels	0:1193dbfe28e2	194	for ( int x=0; x < outlen; x++ )
pwheels	0:1193dbfe28e2	195	{
pwheels	0:1193dbfe28e2	196	switch (portnum) {
pwheels	0:1193dbfe28e2	197	case 1:
pwheels	0:1193dbfe28e2	198	if (com1.writeable()) {
pwheels	0:1193dbfe28e2	199	com1.putc( outbuf[x]);
pwheels	0:1193dbfe28e2	200	}
pwheels	0:1193dbfe28e2	201	break;
pwheels	0:1193dbfe28e2	202	case 2:
pwheels	0:1193dbfe28e2	203	if (com2.writeable()) {
pwheels	0:1193dbfe28e2	204	com2.putc( outbuf[x]);
pwheels	0:1193dbfe28e2	205	}
pwheels	0:1193dbfe28e2	206	break;
pwheels	0:1193dbfe28e2	207	case 3:
pwheels	0:1193dbfe28e2	208	if (com3.writeable()) {
pwheels	0:1193dbfe28e2	209	com3.putc( outbuf[x]);
pwheels	0:1193dbfe28e2	210	//printf("idx-%d, char-%2x\r\n", x, outbuf[x]);
pwheels	0:1193dbfe28e2	211	}
pwheels	0:1193dbfe28e2	212	break;
pwheels	0:1193dbfe28e2	213	}
pwheels	0:1193dbfe28e2	214	wait_ms(1);
pwheels	0:1193dbfe28e2	215	}
pwheels	0:1193dbfe28e2	216
pwheels	0:1193dbfe28e2	217	switch (portnum) {
pwheels	0:1193dbfe28e2	218	case 1:
pwheels	0:1193dbfe28e2	219	while ( (LPC_UART1->LSR & 0x40) == 0 ) {}
pwheels	0:1193dbfe28e2	220	break;
pwheels	0:1193dbfe28e2	221	case 2:
pwheels	0:1193dbfe28e2	222	while ( (LPC_UART2->LSR & 0x40) == 0 ) {}
pwheels	0:1193dbfe28e2	223	break;
pwheels	0:1193dbfe28e2	224	case 3:
pwheels	0:1193dbfe28e2	225	while ( (LPC_UART3->LSR & 0x40) == 0 ) {}
pwheels	0:1193dbfe28e2	226	break;
pwheels	0:1193dbfe28e2	227	}
pwheels	0:1193dbfe28e2	228	return 1;
pwheels	0:1193dbfe28e2	229	}
pwheels	0:1193dbfe28e2	230
pwheels	0:1193dbfe28e2	231	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	232	// Read an array of bytes from the COM port, verify that it was
pwheels	0:1193dbfe28e2	233	// received. Assume that baud rate has been set.
pwheels	0:1193dbfe28e2	234	//
pwheels	0:1193dbfe28e2	235	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	236	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	237	// 'inlen' - number of bytes to read from COM port
pwheels	0:1193dbfe28e2	238	// 'inbuf' - pointer to a buffer to hold the incoming bytes
pwheels	0:1193dbfe28e2	239	//
pwheels	0:1193dbfe28e2	240	// Returns: number of characters read
pwheels	0:1193dbfe28e2	241	//
pwheels	0:1193dbfe28e2	242	int ReadCOM(int portnum, int inlen, unsigned char *inbuf) {
pwheels	0:1193dbfe28e2	243
pwheels	0:1193dbfe28e2	244	string buffer ("");
pwheels	0:1193dbfe28e2	245	Timer t;
pwheels	0:1193dbfe28e2	246	int numchar = 0;
pwheels	0:1193dbfe28e2	247	int read =0;
pwheels	0:1193dbfe28e2	248
pwheels	0:1193dbfe28e2	249	t.start(); // Start timeout timer
pwheels	0:1193dbfe28e2	250
pwheels	0:1193dbfe28e2	251	while ( t.read_ms() < 1000 ) { // If we haven't timed out....
pwheels	0:1193dbfe28e2	252	switch (portnum) {
pwheels	0:1193dbfe28e2	253	case 1:
pwheels	0:1193dbfe28e2	254	if (com1.readable()) {
pwheels	0:1193dbfe28e2	255	read = com1.getc();
pwheels	0:1193dbfe28e2	256	buffer += read;
pwheels	0:1193dbfe28e2	257	numchar++;
pwheels	0:1193dbfe28e2	258	t.reset();
pwheels	0:1193dbfe28e2	259	}
pwheels	0:1193dbfe28e2	260	break;
pwheels	0:1193dbfe28e2	261	case 2:
pwheels	0:1193dbfe28e2	262	if (com2.readable()) {
pwheels	0:1193dbfe28e2	263	read = com2.getc();
pwheels	0:1193dbfe28e2	264	buffer += read;
pwheels	0:1193dbfe28e2	265	numchar++;
pwheels	0:1193dbfe28e2	266	t.reset();
pwheels	0:1193dbfe28e2	267	}
pwheels	0:1193dbfe28e2	268	break;
pwheels	0:1193dbfe28e2	269	case 3:
pwheels	0:1193dbfe28e2	270	if (com3.readable()) {
pwheels	0:1193dbfe28e2	271	read = com3.getc();
pwheels	0:1193dbfe28e2	272	buffer += read;
pwheels	0:1193dbfe28e2	273	numchar++;
pwheels	0:1193dbfe28e2	274	t.reset();
pwheels	0:1193dbfe28e2	275	}
pwheels	0:1193dbfe28e2	276	break;
pwheels	0:1193dbfe28e2	277	}
pwheels	0:1193dbfe28e2	278
pwheels	0:1193dbfe28e2	279	if (numchar == inlen)
pwheels	0:1193dbfe28e2	280	{
pwheels	0:1193dbfe28e2	281	break;
pwheels	0:1193dbfe28e2	282	}
pwheels	0:1193dbfe28e2	283	}
pwheels	0:1193dbfe28e2	284
pwheels	0:1193dbfe28e2	285	buffer.copy( (char*)inbuf, numchar );
pwheels	0:1193dbfe28e2	286
pwheels	0:1193dbfe28e2	287	return numchar;
pwheels	0:1193dbfe28e2	288	}
pwheels	0:1193dbfe28e2	289
pwheels	0:1193dbfe28e2	290	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	291	// Send a break on the com port for at least 2 ms
pwheels	0:1193dbfe28e2	292	//
pwheels	0:1193dbfe28e2	293	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	294	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	295	//
pwheels	0:1193dbfe28e2	296	void BreakCOM(int portnum) {
pwheels	0:1193dbfe28e2	297	int BREAK_time = 2;
pwheels	0:1193dbfe28e2	298
pwheels	0:1193dbfe28e2	299	switch (portnum) {
pwheels	0:1193dbfe28e2	300	case 1:
pwheels	0:1193dbfe28e2	301	// Send Line Break
pwheels	0:1193dbfe28e2	302	LPC_UART1->LCR \|= 0x40;
pwheels	0:1193dbfe28e2	303	wait_ms( BREAK_time );
pwheels	0:1193dbfe28e2	304	// Mark after break
pwheels	0:1193dbfe28e2	305	LPC_UART1->LCR &= ~(0x40);
pwheels	0:1193dbfe28e2	306	break;
pwheels	0:1193dbfe28e2	307	case 2:
pwheels	0:1193dbfe28e2	308	// Send Line Break
pwheels	0:1193dbfe28e2	309	LPC_UART2->LCR \|= 0x40;
pwheels	0:1193dbfe28e2	310	wait_ms( BREAK_time );
pwheels	0:1193dbfe28e2	311	// Mark after break
pwheels	0:1193dbfe28e2	312	LPC_UART2->LCR &= ~(0x40);
pwheels	0:1193dbfe28e2	313	break;
pwheels	0:1193dbfe28e2	314	case 3:
pwheels	0:1193dbfe28e2	315	// Send Line Break
pwheels	0:1193dbfe28e2	316	LPC_UART3->LCR \|= 0x40;
pwheels	0:1193dbfe28e2	317	wait_ms( BREAK_time );
pwheels	0:1193dbfe28e2	318	// Mark after break
pwheels	0:1193dbfe28e2	319	LPC_UART3->LCR &= ~(0x40);
pwheels	0:1193dbfe28e2	320	break;
pwheels	0:1193dbfe28e2	321	default:
pwheels	0:1193dbfe28e2	322	break;
pwheels	0:1193dbfe28e2	323	}
pwheels	0:1193dbfe28e2	324
pwheels	0:1193dbfe28e2	325	wait_us( BREAK_time );
pwheels	0:1193dbfe28e2	326	}
pwheels	0:1193dbfe28e2	327
pwheels	0:1193dbfe28e2	328	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	329	// Set the baud rate on the com port.
pwheels	0:1193dbfe28e2	330	//
pwheels	0:1193dbfe28e2	331	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	332	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	333	// 'new_baud' - new baud rate defined as
pwheels	0:1193dbfe28e2	334	// PARMSET_9600 0x00
pwheels	0:1193dbfe28e2	335	// PARMSET_19200 0x02
pwheels	0:1193dbfe28e2	336	// PARMSET_57600 0x04
pwheels	0:1193dbfe28e2	337	// PARMSET_115200 0x06
pwheels	0:1193dbfe28e2	338	//
pwheels	0:1193dbfe28e2	339	void SetBaudCOM(int portnum, int new_baud) {
pwheels	0:1193dbfe28e2	340
pwheels	0:1193dbfe28e2	341	int baud_rate = 9600;
pwheels	0:1193dbfe28e2	342
pwheels	0:1193dbfe28e2	343	switch (new_baud) {
pwheels	0:1193dbfe28e2	344	case 0:
pwheels	0:1193dbfe28e2	345	baud_rate = 9600;
pwheels	0:1193dbfe28e2	346	break;
pwheels	0:1193dbfe28e2	347	case 2:
pwheels	0:1193dbfe28e2	348	baud_rate = 19200;
pwheels	0:1193dbfe28e2	349	break;
pwheels	0:1193dbfe28e2	350	case 4:
pwheels	0:1193dbfe28e2	351	baud_rate = 57600;
pwheels	0:1193dbfe28e2	352	break;
pwheels	0:1193dbfe28e2	353	case 6:
pwheels	0:1193dbfe28e2	354	baud_rate = 115200;
pwheels	0:1193dbfe28e2	355	break;
pwheels	0:1193dbfe28e2	356	}
pwheels	0:1193dbfe28e2	357
pwheels	0:1193dbfe28e2	358	switch (portnum) {
pwheels	0:1193dbfe28e2	359
pwheels	0:1193dbfe28e2	360	case 1:
pwheels	0:1193dbfe28e2	361	com1.baud(baud_rate);
pwheels	0:1193dbfe28e2	362	break;
pwheels	0:1193dbfe28e2	363	case 2:
pwheels	0:1193dbfe28e2	364	com2.baud(baud_rate);
pwheels	0:1193dbfe28e2	365	break;
pwheels	0:1193dbfe28e2	366	case 3:
pwheels	0:1193dbfe28e2	367	com2.baud(baud_rate);
pwheels	0:1193dbfe28e2	368	break;
pwheels	0:1193dbfe28e2	369	}
pwheels	0:1193dbfe28e2	370	}
pwheels	0:1193dbfe28e2	371
pwheels	0:1193dbfe28e2	372	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	373	// Description:
pwheels	0:1193dbfe28e2	374	// Delay for at least 'len' ms
pwheels	0:1193dbfe28e2	375	//
pwheels	0:1193dbfe28e2	376	void msDelay(int len)
pwheels	0:1193dbfe28e2	377	{
pwheels	0:1193dbfe28e2	378	wait_ms( len );
pwheels	0:1193dbfe28e2	379	}
pwheels	0:1193dbfe28e2	380
pwheels	0:1193dbfe28e2	381	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	382	// Get the current millisecond tick count. Does not have to represent
pwheels	0:1193dbfe28e2	383	// an actual time, it just needs to be an incrementing timer.
pwheels	0:1193dbfe28e2	384	//
pwheels	0:1193dbfe28e2	385	long msGettick(void) {
pwheels	0:1193dbfe28e2	386	// add platform specific code here
pwheels	0:1193dbfe28e2	387	return 0;
pwheels	0:1193dbfe28e2	388	}
pwheels	0:1193dbfe28e2	389
pwheels	0:1193dbfe28e2	390	/* from here onwards functions have been removed, further evaluation needed
pwheels	0:1193dbfe28e2	391	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	392	// This procedure indicates wether the adapter can deliver power.
pwheels	0:1193dbfe28e2	393	//
pwheels	0:1193dbfe28e2	394	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	395	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	396	//
pwheels	0:1193dbfe28e2	397	// Returns: TRUE if adapter is capable of delivering power.
pwheels	0:1193dbfe28e2	398	//
pwheels	0:1193dbfe28e2	399	SMALLINT owHasPowerDelivery(int portnum) {
pwheels	0:1193dbfe28e2	400
pwheels	0:1193dbfe28e2	401	// add adapter specific code here
pwheels	0:1193dbfe28e2	402	return TRUE;
pwheels	0:1193dbfe28e2	403	}
pwheels	0:1193dbfe28e2	404
pwheels	0:1193dbfe28e2	405	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	406	// This procedure indicates wether the adapter can deliver power.
pwheels	0:1193dbfe28e2	407	//
pwheels	0:1193dbfe28e2	408	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	409	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	410	//
pwheels	0:1193dbfe28e2	411	// Returns: TRUE if adapter is capable of over drive.
pwheels	0:1193dbfe28e2	412	//
pwheels	0:1193dbfe28e2	413	SMALLINT owHasOverDrive(int portnum) {
pwheels	0:1193dbfe28e2	414
pwheels	0:1193dbfe28e2	415	// add adapter specific code here
pwheels	0:1193dbfe28e2	416	return TRUE;
pwheels	0:1193dbfe28e2	417	}
pwheels	0:1193dbfe28e2	418
pwheels	0:1193dbfe28e2	419	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	420	// This procedure creates a fixed 480 microseconds 12 volt pulse
pwheels	0:1193dbfe28e2	421	// on the 1-Wire Net for programming EPROM iButtons.
pwheels	0:1193dbfe28e2	422	//
pwheels	0:1193dbfe28e2	423	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	424	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	425	//
pwheels	0:1193dbfe28e2	426	// Returns: TRUE program volatage available
pwheels	0:1193dbfe28e2	427	// FALSE program voltage not available
pwheels	0:1193dbfe28e2	428	SMALLINT owHasProgramPulse(int portnum)
pwheels	0:1193dbfe28e2	429	{
pwheels	0:1193dbfe28e2	430	// add adapter specific code here
pwheels	0:1193dbfe28e2	431	return TRUE;
pwheels	0:1193dbfe28e2	432	}
pwheels	0:1193dbfe28e2	433
pwheels	0:1193dbfe28e2	434
pwheels	0:1193dbfe28e2	435	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	436	// Send 8 bits of communication to the 1-Wire Net and verify that the
pwheels	0:1193dbfe28e2	437	// 8 bits read from the 1-Wire Net is the same (write operation).
pwheels	0:1193dbfe28e2	438	// The parameter 'sendbyte' least significant 8 bits are used. After the
pwheels	0:1193dbfe28e2	439	// 8 bits are sent change the level of the 1-Wire net.
pwheels	0:1193dbfe28e2	440	//
pwheels	0:1193dbfe28e2	441	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	442	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	443	// 'sendbyte' - 8 bits to send (least significant byte)
pwheels	0:1193dbfe28e2	444	//
pwheels	0:1193dbfe28e2	445	// Returns: TRUE: bytes written and echo was the same
pwheels	0:1193dbfe28e2	446	// FALSE: echo was not the same
pwheels	0:1193dbfe28e2	447	//
pwheels	0:1193dbfe28e2	448	SMALLINT owWriteBytePower(int portnum, SMALLINT sendbyte)
pwheels	0:1193dbfe28e2	449	{
pwheels	0:1193dbfe28e2	450	// replace if platform has better implementation (faster response)
pwheels	0:1193dbfe28e2	451	if (!owHasPowerDelivery(portnum))
pwheels	0:1193dbfe28e2	452	return FALSE;
pwheels	0:1193dbfe28e2	453
pwheels	0:1193dbfe28e2	454	if(owTouchByte(portnum,sendbyte) != sendbyte)
pwheels	0:1193dbfe28e2	455	return FALSE;
pwheels	0:1193dbfe28e2	456
pwheels	0:1193dbfe28e2	457	if(owLevel(portnum,MODE_STRONG5) != MODE_STRONG5)
pwheels	0:1193dbfe28e2	458	return FALSE;
pwheels	0:1193dbfe28e2	459
pwheels	0:1193dbfe28e2	460	return TRUE;
pwheels	0:1193dbfe28e2	461	}
pwheels	0:1193dbfe28e2	462
pwheels	0:1193dbfe28e2	463
pwheels	0:1193dbfe28e2	464	//--------------------------------------------------------------------------
pwheels	0:1193dbfe28e2	465	// Send 1 bit of communication to the 1-Wire Net and verify that the
pwheels	0:1193dbfe28e2	466	// response matches the 'applyPowerResponse' bit and apply power delivery
pwheels	0:1193dbfe28e2	467	// to the 1-Wire net. Note that some implementations may apply the power
pwheels	0:1193dbfe28e2	468	// first and then turn it off if the response is incorrect.
pwheels	0:1193dbfe28e2	469	//
pwheels	0:1193dbfe28e2	470	// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
pwheels	0:1193dbfe28e2	471	// OpenCOM to indicate the port number.
pwheels	0:1193dbfe28e2	472	// 'applyPowerResponse' - 1 bit response to check, if correct then start
pwheels	0:1193dbfe28e2	473	// power delivery
pwheels	0:1193dbfe28e2	474	//
pwheels	0:1193dbfe28e2	475	// Returns: TRUE: bit written and response correct, strong pullup now on
pwheels	0:1193dbfe28e2	476	// FALSE: response incorrect
pwheels	0:1193dbfe28e2	477	//
pwheels	0:1193dbfe28e2	478	SMALLINT owReadBitPower(int portnum, SMALLINT applyPowerResponse)
pwheels	0:1193dbfe28e2	479	{
pwheels	0:1193dbfe28e2	480	// replace if platform has better implementation (faster response)
pwheels	0:1193dbfe28e2	481	if (!owHasPowerDelivery(portnum))
pwheels	0:1193dbfe28e2	482	return FALSE;
pwheels	0:1193dbfe28e2	483
pwheels	0:1193dbfe28e2	484	if(owTouchBit(portnum,0x01) != applyPowerResponse)
pwheels	0:1193dbfe28e2	485	return FALSE;
pwheels	0:1193dbfe28e2	486
pwheels	0:1193dbfe28e2	487	if(owLevel(portnum,MODE_STRONG5) != MODE_STRONG5)
pwheels	0:1193dbfe28e2	488	return FALSE;
pwheels	0:1193dbfe28e2	489
pwheels	0:1193dbfe28e2	490	return TRUE;
pwheels	0:1193dbfe28e2	491	}
pwheels	0:1193dbfe28e2	492
pwheels	0:1193dbfe28e2	493	*/

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	24 Mar 2011
Imports:	104
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	6

mbedlnk.cpp@0:1193dbfe28e2, 2011-03-24 (annotated)

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