mbed_kitt - Simple Demo of PWM to show a KITT display with tr…

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Wim Huiskamp / Mbed 2 deprecated mbed_kitt

Simple Demo of PWM to show a KITT display with trailing LEDs

main.cpp@0:812790893086, 2011-11-23 (annotated)

Committer:: wim
Date:: Wed Nov 23 20:18:59 2011 +0000
Revision:: 0:812790893086

Who changed what in which revision?

User	Revision	Line number	New contents of line
wim	0:812790893086	1	#include "mbed.h"
wim	0:812790893086	2
wim	0:812790893086	3	Serial pc(USBTX, USBRX); // tx, rx
wim	0:812790893086	4
wim	0:812790893086	5	// Variables for Heartbeat and Status
wim	0:812790893086	6	Ticker heartbeat;
wim	0:812790893086	7	bool heartbeatflag=false;
wim	0:812790893086	8
wim	0:812790893086	9	PwmOut K1(LED1);
wim	0:812790893086	10	PwmOut K2(LED2);
wim	0:812790893086	11	PwmOut K3(LED3);
wim	0:812790893086	12	PwmOut K4(LED4);
wim	0:812790893086	13
wim	0:812790893086	14	void show_menu() {
wim	0:812790893086	15	pc.printf("0: Exit\n\r");
wim	0:812790893086	16	pc.printf("1: Show Menu\n\r");
wim	0:812790893086	17	pc.printf("2: Start KITT\n\r");
wim	0:812790893086	18	pc.printf("3: Stop KITT\n\r");
wim	0:812790893086	19	pc.printf("\n\r");
wim	0:812790893086	20	}
wim	0:812790893086	21
wim	0:812790893086	22
wim	0:812790893086	23	#define KITT_PERIOD 0.010
wim	0:812790893086	24	#define KITT_OFF 0.00
wim	0:812790893086	25	#define KITT_20 (KITT_PERIOD / 15.0)
wim	0:812790893086	26	#define KITT_50 (KITT_PERIOD / 5.0)
wim	0:812790893086	27	#define KITT_MAX (KITT_PERIOD)
wim	0:812790893086	28
wim	0:812790893086	29	// Heartbeat monitor
wim	0:812790893086	30	void pulse() {
wim	0:812790893086	31	static int kitt_state=0;
wim	0:812790893086	32
wim	0:812790893086	33	if (!heartbeatflag) {
wim	0:812790893086	34	K1.pulsewidth(KITT_OFF); // K1 Off
wim	0:812790893086	35	K2.pulsewidth(KITT_OFF); // K2 Off
wim	0:812790893086	36	K3.pulsewidth(KITT_OFF); // K3 Off
wim	0:812790893086	37	K4.pulsewidth(KITT_OFF); // K4 Off
wim	0:812790893086	38	}
wim	0:812790893086	39	else {
wim	0:812790893086	40
wim	0:812790893086	41	switch (kitt_state) {
wim	0:812790893086	42	case 0:
wim	0:812790893086	43	// 1000
wim	0:812790893086	44	K1.pulsewidth(KITT_MAX); // K1 On
wim	0:812790893086	45	K2.pulsewidth(KITT_20); // K2 Decay
wim	0:812790893086	46	K3.pulsewidth(KITT_OFF); // K3 Off
wim	0:812790893086	47	K4.pulsewidth(KITT_OFF); // K4 Off
wim	0:812790893086	48
wim	0:812790893086	49	kitt_state++;
wim	0:812790893086	50	break;
wim	0:812790893086	51	case 1:
wim	0:812790893086	52	// 0100
wim	0:812790893086	53	K1.pulsewidth(KITT_50); // K1 Decay
wim	0:812790893086	54	K2.pulsewidth(KITT_MAX); // K2 On
wim	0:812790893086	55	K3.pulsewidth(KITT_OFF); // K3 Off
wim	0:812790893086	56	K4.pulsewidth(KITT_OFF); // K4 Off
wim	0:812790893086	57
wim	0:812790893086	58	kitt_state++;
wim	0:812790893086	59	break;
wim	0:812790893086	60	case 2:
wim	0:812790893086	61	// 0010
wim	0:812790893086	62	K1.pulsewidth(KITT_20); // K1 Decay
wim	0:812790893086	63	K2.pulsewidth(KITT_50); // K2 Decay
wim	0:812790893086	64	K3.pulsewidth(KITT_MAX); // K3 On
wim	0:812790893086	65	K4.pulsewidth(KITT_OFF); // K4 Off
wim	0:812790893086	66
wim	0:812790893086	67	kitt_state++;
wim	0:812790893086	68	break;
wim	0:812790893086	69	case 3:
wim	0:812790893086	70	// 0001
wim	0:812790893086	71	K1.pulsewidth(KITT_OFF); // K1 Off
wim	0:812790893086	72	K2.pulsewidth(KITT_20); // K2 Decay
wim	0:812790893086	73	K3.pulsewidth(KITT_50); // K3 Decay
wim	0:812790893086	74	K4.pulsewidth(KITT_MAX); // K4 On
wim	0:812790893086	75
wim	0:812790893086	76	kitt_state++;
wim	0:812790893086	77	break;
wim	0:812790893086	78	case 4:
wim	0:812790893086	79	// 0001
wim	0:812790893086	80	K1.pulsewidth(KITT_OFF); // K1 Off
wim	0:812790893086	81	K2.pulsewidth(KITT_OFF); // K2 Off
wim	0:812790893086	82	K3.pulsewidth(KITT_20); // K3 Decay
wim	0:812790893086	83	K4.pulsewidth(KITT_MAX); // K4 On
wim	0:812790893086	84
wim	0:812790893086	85	kitt_state++;
wim	0:812790893086	86	break;
wim	0:812790893086	87	case 5:
wim	0:812790893086	88	// 0010
wim	0:812790893086	89	K1.pulsewidth(KITT_OFF); // K1 Off
wim	0:812790893086	90	K2.pulsewidth(KITT_OFF); // K2 Off
wim	0:812790893086	91	K3.pulsewidth(KITT_MAX); // K3 On
wim	0:812790893086	92	K4.pulsewidth(KITT_50); // K4 Decay
wim	0:812790893086	93
wim	0:812790893086	94	kitt_state++;
wim	0:812790893086	95	break;
wim	0:812790893086	96	case 6:
wim	0:812790893086	97	// 0100
wim	0:812790893086	98	K1.pulsewidth(KITT_OFF); // K1 Off
wim	0:812790893086	99	K2.pulsewidth(KITT_MAX); // K2 On
wim	0:812790893086	100	K3.pulsewidth(KITT_50); // K3 Decay
wim	0:812790893086	101	K4.pulsewidth(KITT_20); // K4 Decay
wim	0:812790893086	102
wim	0:812790893086	103	kitt_state++;
wim	0:812790893086	104	break;
wim	0:812790893086	105	case 7:
wim	0:812790893086	106	// 1000
wim	0:812790893086	107	K1.pulsewidth(KITT_MAX); // K1 On
wim	0:812790893086	108	K2.pulsewidth(KITT_50); // K2 Decay
wim	0:812790893086	109	K3.pulsewidth(KITT_20); // K3 Decay
wim	0:812790893086	110	K4.pulsewidth(KITT_OFF); // K4 Off
wim	0:812790893086	111
wim	0:812790893086	112	kitt_state = 0;
wim	0:812790893086	113	break;
wim	0:812790893086	114
wim	0:812790893086	115	} //switch
wim	0:812790893086	116	} //if
wim	0:812790893086	117
wim	0:812790893086	118	}
wim	0:812790893086	119
wim	0:812790893086	120
wim	0:812790893086	121	void heartbeat_start() {
wim	0:812790893086	122	heartbeat.attach(&pulse, 0.1);
wim	0:812790893086	123
wim	0:812790893086	124	K1.period(KITT_PERIOD); // KITT LEDs period
wim	0:812790893086	125
wim	0:812790893086	126	heartbeatflag = true;
wim	0:812790893086	127	}
wim	0:812790893086	128
wim	0:812790893086	129	void heartbeat_stop() {
wim	0:812790893086	130	heartbeat.detach();
wim	0:812790893086	131	heartbeatflag = false;
wim	0:812790893086	132	}
wim	0:812790893086	133
wim	0:812790893086	134
wim	0:812790893086	135	int main() {
wim	0:812790893086	136
wim	0:812790893086	137	bool running=true;
wim	0:812790893086	138	char command;
wim	0:812790893086	139	pc.printf("Hello World!\n\r");
wim	0:812790893086	140
wim	0:812790893086	141	heartbeat_start();
wim	0:812790893086	142
wim	0:812790893086	143	show_menu();
wim	0:812790893086	144
wim	0:812790893086	145	while(running) {
wim	0:812790893086	146
wim	0:812790893086	147	if(pc.readable()) {
wim	0:812790893086	148	command = pc.getc();
wim	0:812790893086	149	pc.printf("command= %c \n\r", command);
wim	0:812790893086	150
wim	0:812790893086	151	switch (command) {
wim	0:812790893086	152	case '0' :
wim	0:812790893086	153	pc.printf("Done\n\r");
wim	0:812790893086	154	running = false;
wim	0:812790893086	155	break;
wim	0:812790893086	156
wim	0:812790893086	157	case '1' :
wim	0:812790893086	158	show_menu();
wim	0:812790893086	159	break;
wim	0:812790893086	160
wim	0:812790893086	161	case '2' :
wim	0:812790893086	162	pc.printf("Start\n\r");
wim	0:812790893086	163	heartbeatflag = true;
wim	0:812790893086	164	break;
wim	0:812790893086	165
wim	0:812790893086	166	case '3' :
wim	0:812790893086	167	pc.printf("Stop\n\r");
wim	0:812790893086	168	heartbeatflag = false;
wim	0:812790893086	169
wim	0:812790893086	170	break;
wim	0:812790893086	171
wim	0:812790893086	172	} //switch
wim	0:812790893086	173	} // if
wim	0:812790893086	174	} //while
wim	0:812790893086	175
wim	0:812790893086	176	pc.printf("Bye World!\n\r");
wim	0:812790893086	177	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	23 Nov 2011
Imports:	19
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	2

main.cpp@0:812790893086, 2011-11-23 (annotated)

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