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gavin beardall / Mbed 2 deprecated wave1

main.cpp@0:958661d88e40, 2011-10-17 (annotated)

Committer:: gbeardall
Date:: Mon Oct 17 10:42:38 2011 +0000
Revision:: 0:958661d88e40

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User	Revision	Line number	New contents of line
gbeardall	0:958661d88e40	1	/*
gbeardall	0:958661d88e40	2	* wave1: wave test generator
gbeardall	0:958661d88e40	3	*
gbeardall	0:958661d88e40	4	*/
gbeardall	0:958661d88e40	5
gbeardall	0:958661d88e40	6	#include "mbed.h"
gbeardall	0:958661d88e40	7
gbeardall	0:958661d88e40	8	DigitalOut led1(LED1);
gbeardall	0:958661d88e40	9	//DigitalOut led2(LED2);
gbeardall	0:958661d88e40	10	//DigitalOut led3(LED3);
gbeardall	0:958661d88e40	11	//DigitalOut led4(LED4);
gbeardall	0:958661d88e40	12
gbeardall	0:958661d88e40	13	DigitalOut osc1(p21);
gbeardall	0:958661d88e40	14	//PwmOut led1(LED1);
gbeardall	0:958661d88e40	15
gbeardall	0:958661d88e40	16	Serial pc(USBTX,USBRX);
gbeardall	0:958661d88e40	17
gbeardall	0:958661d88e40	18	Ticker oscTick1;
gbeardall	0:958661d88e40	19
gbeardall	0:958661d88e40	20	// ---------------------------------------------------------------------------
gbeardall	0:958661d88e40	21	#if 1
gbeardall	0:958661d88e40	22	int oscData[] = { 1,1,1,0,0,0,0 };
gbeardall	0:958661d88e40	23	#endif
gbeardall	0:958661d88e40	24	#if 0
gbeardall	0:958661d88e40	25	// DMFM
gbeardall	0:958661d88e40	26	int oscData[] = { 0,1,1,0,0,0,0,1,1,1,0,0,0,1,1,0,0,0,0,1,1,1,0,0,
gbeardall	0:958661d88e40	27	1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0,
gbeardall	0:958661d88e40	28	1,1,0,0,1,1,0,0,1,1,0,0,
gbeardall	0:958661d88e40	29	1,1,1,0,0,0,1,1,1,0,0,0
gbeardall	0:958661d88e40	30	};
gbeardall	0:958661d88e40	31	#endif
gbeardall	0:958661d88e40	32	#if 0
gbeardall	0:958661d88e40	33	// Manchester
gbeardall	0:958661d88e40	34	int oscData[] = { 0,1,0,1,0,0,1,1,0,0,1,1,0,1,0,1,0,1,0,
gbeardall	0:958661d88e40	35	0,1,1,0,1,1,0,0,1,0,0,1,0,0,
gbeardall	0:958661d88e40	36	};
gbeardall	0:958661d88e40	37	#endif
gbeardall	0:958661d88e40	38
gbeardall	0:958661d88e40	39	const int dx_max = sizeof(oscData)/sizeof(oscData[0]);
gbeardall	0:958661d88e40	40	int dx = 0;
gbeardall	0:958661d88e40	41
gbeardall	0:958661d88e40	42	// ---------------------------------------------------------------------------
gbeardall	0:958661d88e40	43
gbeardall	0:958661d88e40	44	enum { RESET=0, SCRAMBLE, DESCRAMBLE };
gbeardall	0:958661d88e40	45	int scramble1(int b, int func) {
gbeardall	0:958661d88e40	46	static int crc = 0; // 7 bit
gbeardall	0:958661d88e40	47	int fb;
gbeardall	0:958661d88e40	48	int op;
gbeardall	0:958661d88e40	49
gbeardall	0:958661d88e40	50	b = !!b;
gbeardall	0:958661d88e40	51
gbeardall	0:958661d88e40	52	fb = !!(crc & 0x40) ^ !!(crc & 0x08);
gbeardall	0:958661d88e40	53	crc <<= 1;
gbeardall	0:958661d88e40	54	op = b ^ fb;
gbeardall	0:958661d88e40	55
gbeardall	0:958661d88e40	56	switch(func) {
gbeardall	0:958661d88e40	57	case SCRAMBLE:
gbeardall	0:958661d88e40	58	crc \|= op;
gbeardall	0:958661d88e40	59	break;
gbeardall	0:958661d88e40	60	case DESCRAMBLE:
gbeardall	0:958661d88e40	61	crc \|= b;
gbeardall	0:958661d88e40	62	break;
gbeardall	0:958661d88e40	63	case RESET:
gbeardall	0:958661d88e40	64	op = 0;
gbeardall	0:958661d88e40	65	crc = 0;
gbeardall	0:958661d88e40	66	break;
gbeardall	0:958661d88e40	67	} // switch - op
gbeardall	0:958661d88e40	68
gbeardall	0:958661d88e40	69	return !!op;
gbeardall	0:958661d88e40	70
gbeardall	0:958661d88e40	71	} // scramble1
gbeardall	0:958661d88e40	72
gbeardall	0:958661d88e40	73	// ---------------------------------------------------------------------------
gbeardall	0:958661d88e40	74
gbeardall	0:958661d88e40	75	int nrz() {
gbeardall	0:958661d88e40	76	static int c = 0;
gbeardall	0:958661d88e40	77	static int b = 0;
gbeardall	0:958661d88e40	78	static int op = 0;
gbeardall	0:958661d88e40	79
gbeardall	0:958661d88e40	80	if(c == 0) {
gbeardall	0:958661d88e40	81	// bit start
gbeardall	0:958661d88e40	82	b = scramble1(1,SCRAMBLE);
gbeardall	0:958661d88e40	83	op = b; // set data
gbeardall	0:958661d88e40	84	}
gbeardall	0:958661d88e40	85	else {
gbeardall	0:958661d88e40	86	// bit centre
gbeardall	0:958661d88e40	87	// same data
gbeardall	0:958661d88e40	88	}
gbeardall	0:958661d88e40	89
gbeardall	0:958661d88e40	90	if(++c > 1) c = 0;
gbeardall	0:958661d88e40	91
gbeardall	0:958661d88e40	92	return op;
gbeardall	0:958661d88e40	93	} // nrz
gbeardall	0:958661d88e40	94
gbeardall	0:958661d88e40	95	int nrzi() {
gbeardall	0:958661d88e40	96	static int c = 0;
gbeardall	0:958661d88e40	97	static int b = 0;
gbeardall	0:958661d88e40	98	static int op = 0;
gbeardall	0:958661d88e40	99
gbeardall	0:958661d88e40	100	if(c == 0) {
gbeardall	0:958661d88e40	101	// bit start
gbeardall	0:958661d88e40	102	b = scramble1(1,SCRAMBLE);
gbeardall	0:958661d88e40	103	}
gbeardall	0:958661d88e40	104	else {
gbeardall	0:958661d88e40	105	// bit centre
gbeardall	0:958661d88e40	106	if(b == 1) op = !op; // flip if 1
gbeardall	0:958661d88e40	107	}
gbeardall	0:958661d88e40	108
gbeardall	0:958661d88e40	109	if(++c > 1) c = 0;
gbeardall	0:958661d88e40	110
gbeardall	0:958661d88e40	111	return op;
gbeardall	0:958661d88e40	112	} // nrzi
gbeardall	0:958661d88e40	113
gbeardall	0:958661d88e40	114	int man() {
gbeardall	0:958661d88e40	115	static int c = 0;
gbeardall	0:958661d88e40	116	static int b = 0;
gbeardall	0:958661d88e40	117	static int op = 0;
gbeardall	0:958661d88e40	118
gbeardall	0:958661d88e40	119	if(c == 0) {
gbeardall	0:958661d88e40	120	// bit start
gbeardall	0:958661d88e40	121	int d = rand()&1;
gbeardall	0:958661d88e40	122	b = scramble1(d,SCRAMBLE);
gbeardall	0:958661d88e40	123	op = !b; // setup for transition
gbeardall	0:958661d88e40	124	}
gbeardall	0:958661d88e40	125	else {
gbeardall	0:958661d88e40	126	// bit centre
gbeardall	0:958661d88e40	127	// transition: +ve=1, -ve=0
gbeardall	0:958661d88e40	128	op = b; // transition direction represents bit sense
gbeardall	0:958661d88e40	129	}
gbeardall	0:958661d88e40	130
gbeardall	0:958661d88e40	131	if(++c > 1) c = 0;
gbeardall	0:958661d88e40	132
gbeardall	0:958661d88e40	133	return op;
gbeardall	0:958661d88e40	134	} // man
gbeardall	0:958661d88e40	135
gbeardall	0:958661d88e40	136	int dman() {
gbeardall	0:958661d88e40	137	static int c = 0;
gbeardall	0:958661d88e40	138	static int b = 0;
gbeardall	0:958661d88e40	139	static int op = 0;
gbeardall	0:958661d88e40	140
gbeardall	0:958661d88e40	141	if(c == 0) {
gbeardall	0:958661d88e40	142	// bit start
gbeardall	0:958661d88e40	143	int d = rand()&1;
gbeardall	0:958661d88e40	144	b = scramble1(d,SCRAMBLE);
gbeardall	0:958661d88e40	145	if(b == 1) op = !op; // flip if 1
gbeardall	0:958661d88e40	146	}
gbeardall	0:958661d88e40	147	else {
gbeardall	0:958661d88e40	148	// bit centre
gbeardall	0:958661d88e40	149	op = !op; // flip always
gbeardall	0:958661d88e40	150	}
gbeardall	0:958661d88e40	151
gbeardall	0:958661d88e40	152	if(++c > 1) c = 0;
gbeardall	0:958661d88e40	153
gbeardall	0:958661d88e40	154	return op;
gbeardall	0:958661d88e40	155	} // dman
gbeardall	0:958661d88e40	156
gbeardall	0:958661d88e40	157	int dmfm() {
gbeardall	0:958661d88e40	158	static int c = 0;
gbeardall	0:958661d88e40	159	static int b = 0;
gbeardall	0:958661d88e40	160	static int b1 = 0;
gbeardall	0:958661d88e40	161	static int op = 0;
gbeardall	0:958661d88e40	162
gbeardall	0:958661d88e40	163
gbeardall	0:958661d88e40	164	if(c == 0) {
gbeardall	0:958661d88e40	165	// bit start
gbeardall	0:958661d88e40	166	int d = rand()&1;
gbeardall	0:958661d88e40	167	b = scramble1(d,SCRAMBLE);
gbeardall	0:958661d88e40	168	if(b1 == 0 && b == 0) op = !op; // flip if 2 zeros
gbeardall	0:958661d88e40	169	b1 = b;
gbeardall	0:958661d88e40	170	}
gbeardall	0:958661d88e40	171	else {
gbeardall	0:958661d88e40	172	// bit centre
gbeardall	0:958661d88e40	173	if(b == 1) op = !op; // flip if 1
gbeardall	0:958661d88e40	174	}
gbeardall	0:958661d88e40	175
gbeardall	0:958661d88e40	176	if(++c > 1) c = 0;
gbeardall	0:958661d88e40	177
gbeardall	0:958661d88e40	178	return op;
gbeardall	0:958661d88e40	179	} // dmfm
gbeardall	0:958661d88e40	180
gbeardall	0:958661d88e40	181	// ---------------------------------------------------------------------------
gbeardall	0:958661d88e40	182
gbeardall	0:958661d88e40	183	void oscOut1() {
gbeardall	0:958661d88e40	184	osc1 = man();
gbeardall	0:958661d88e40	185	//osc1 = oscData[dx++];
gbeardall	0:958661d88e40	186	if(dx >= dx_max) dx = 0;
gbeardall	0:958661d88e40	187	}
gbeardall	0:958661d88e40	188
gbeardall	0:958661d88e40	189	// ---------------------------------------------------------------------------
gbeardall	0:958661d88e40	190
gbeardall	0:958661d88e40	191	int main() {
gbeardall	0:958661d88e40	192
gbeardall	0:958661d88e40	193	scramble1(0,RESET);
gbeardall	0:958661d88e40	194
gbeardall	0:958661d88e40	195
gbeardall	0:958661d88e40	196	osc1 = 0;
gbeardall	0:958661d88e40	197	oscTick1.attach_us(&oscOut1, 500); // chip period
gbeardall	0:958661d88e40	198
gbeardall	0:958661d88e40	199
gbeardall	0:958661d88e40	200	// led1.period(1);
gbeardall	0:958661d88e40	201	// led1.write(50);
gbeardall	0:958661d88e40	202
gbeardall	0:958661d88e40	203	pc.printf("\n\rStart: wave1\n\r");
gbeardall	0:958661d88e40	204
gbeardall	0:958661d88e40	205	while (1) {
gbeardall	0:958661d88e40	206	led1 = 1;
gbeardall	0:958661d88e40	207	wait(0.25);
gbeardall	0:958661d88e40	208	led1 = 0;
gbeardall	0:958661d88e40	209	wait(0.25);
gbeardall	0:958661d88e40	210	//
gbeardall	0:958661d88e40	211	// pc.printf(".");
gbeardall	0:958661d88e40	212	//
gbeardall	0:958661d88e40	213	} // while
gbeardall	0:958661d88e40	214
gbeardall	0:958661d88e40	215	} // main
gbeardall	0:958661d88e40	216
gbeardall	0:958661d88e40	217	// ---------------------------------------------------------------------------
gbeardall	0:958661d88e40	218

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	17 Oct 2011
Imports:	0
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

main.cpp@0:958661d88e40, 2011-10-17 (annotated)

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