PlayStationController -

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Simon Ford / Mbed 2 deprecated PlayStationController

main.cpp@0:da9d848449ef, 2009-11-22 (annotated)

Committer:: simon
Date:: Sun Nov 22 11:10:42 2009 +0000
Revision:: 0:da9d848449ef
Child:: 1:e4af215fb689

Who changed what in which revision?

User	Revision	Line number	New contents of line
simon	0:da9d848449ef	1	#include "mbed.h"
simon	0:da9d848449ef	2
simon	0:da9d848449ef	3	DigitalOut PSclock(p21);
simon	0:da9d848449ef	4	DigitalIn PSdata(p22);
simon	0:da9d848449ef	5	DigitalIn PSack(p23);
simon	0:da9d848449ef	6	DigitalOut PScommand(p24);
simon	0:da9d848449ef	7	DigitalOut PSattention(p25);
simon	0:da9d848449ef	8
simon	0:da9d848449ef	9	Serial pc(USBTX, USBRX); // tx, rx
simon	0:da9d848449ef	10	int temp, data0, data1, data2, data3, data4, data5, i ,debounceSelect;
simon	0:da9d848449ef	11
simon	0:da9d848449ef	12	// enable interupts
simon	0:da9d848449ef	13
simon	0:da9d848449ef	14	int _BV(int bit) {
simon	0:da9d848449ef	15	return 1 << bit;
simon	0:da9d848449ef	16	}
simon	0:da9d848449ef	17
simon	0:da9d848449ef	18	// PSx controller communication function.
simon	0:da9d848449ef	19	// send a byte on the command line and receive one on the data line.
simon	0:da9d848449ef	20	// needs Attention pin to have gone low before called to activate controller.
simon	0:da9d848449ef	21	char gameByte (char command) {
simon	0:da9d848449ef	22	wait(0.000001);
simon	0:da9d848449ef	23	char data = 0x00; // clear data variable to save setting low bits later.
simon	0:da9d848449ef	24	for(int i=0; i<8; i++) {
simon	0:da9d848449ef	25	if (command & _BV(i)) {
simon	0:da9d848449ef	26	PScommand=1; // bit bang "command" out on PScommand wire.
simon	0:da9d848449ef	27	} else {
simon	0:da9d848449ef	28	PScommand = 0;
simon	0:da9d848449ef	29	}
simon	0:da9d848449ef	30	PSclock = 0; // CLOCK LOW
simon	0:da9d848449ef	31	wait_us(20); // wait for output to stabilise
simon	0:da9d848449ef	32	//if ((PIND & _BV(PSdata)))_SFR_BYTE(data) \|= _BV(i); // read PSdata pin and store
simon	0:da9d848449ef	33	//else cbi(data, i);
simon	0:da9d848449ef	34	PSclock = 1; // CLOCK HIGH
simon	0:da9d848449ef	35	}
simon	0:da9d848449ef	36	PScommand = 1;
simon	0:da9d848449ef	37
simon	0:da9d848449ef	38	wait(0.00002); // wait for ACK to pass.
simon	0:da9d848449ef	39
simon	0:da9d848449ef	40	return data;
simon	0:da9d848449ef	41	}
simon	0:da9d848449ef	42
simon	0:da9d848449ef	43
simon	0:da9d848449ef	44	//sei();
simon	0:da9d848449ef	45
simon	0:da9d848449ef	46	// this loop continues to put PSx controller into analouge mode untill the
simon	0:da9d848449ef	47	// controller responds with 0x73 in the 2nd byte.
simon	0:da9d848449ef	48	// (PS2 controller responds with 0x73 when in analouge mode.)
simon	0:da9d848449ef	49	// the status LEDs will continue to count upwards untill a controller is found.
simon	0:da9d848449ef	50	// if everything is working correctly this should happen on the first pass of
simon	0:da9d848449ef	51	// this loop but occasionally errors occur and a 2nd or 3rd itteration happen.
simon	0:da9d848449ef	52	int chk_ana = 0, cnt = 0;
simon	0:da9d848449ef	53
simon	0:da9d848449ef	54	void startup() {
simon	0:da9d848449ef	55
simon	0:da9d848449ef	56	while (chk_ana != 0x73) {
simon	0:da9d848449ef	57	// put controller in config mode
simon	0:da9d848449ef	58	PScommand = 1;
simon	0:da9d848449ef	59	PSclock = 1;
simon	0:da9d848449ef	60	PSattention =0;
simon	0:da9d848449ef	61
simon	0:da9d848449ef	62	gameByte(0x01);
simon	0:da9d848449ef	63	gameByte(0x43);
simon	0:da9d848449ef	64	gameByte(0x00);
simon	0:da9d848449ef	65	gameByte(0x01);
simon	0:da9d848449ef	66	gameByte(0x00);
simon	0:da9d848449ef	67
simon	0:da9d848449ef	68	PScommand = 1;
simon	0:da9d848449ef	69	wait(0.000001);
simon	0:da9d848449ef	70	PSattention=1;
simon	0:da9d848449ef	71
simon	0:da9d848449ef	72	wait(0.00001);
simon	0:da9d848449ef	73
simon	0:da9d848449ef	74	// put controller in analog mode
simon	0:da9d848449ef	75	PScommand = 1;
simon	0:da9d848449ef	76	PSclock =1;
simon	0:da9d848449ef	77	PSattention =1;;
simon	0:da9d848449ef	78
simon	0:da9d848449ef	79	gameByte(0x01);
simon	0:da9d848449ef	80	gameByte(0x44);
simon	0:da9d848449ef	81	gameByte(0x00);
simon	0:da9d848449ef	82	gameByte(0x01);
simon	0:da9d848449ef	83	gameByte(0x03);
simon	0:da9d848449ef	84	gameByte(0x00);
simon	0:da9d848449ef	85	gameByte(0x00);
simon	0:da9d848449ef	86	gameByte(0x00);
simon	0:da9d848449ef	87	gameByte(0x00);
simon	0:da9d848449ef	88
simon	0:da9d848449ef	89	PScommand = 1;
simon	0:da9d848449ef	90	wait(0.000001);
simon	0:da9d848449ef	91	PSattention =1;
simon	0:da9d848449ef	92
simon	0:da9d848449ef	93	wait(0.00001);
simon	0:da9d848449ef	94
simon	0:da9d848449ef	95	// exit config mode
simon	0:da9d848449ef	96	PScommand = 1;
simon	0:da9d848449ef	97	PSclock = 1;
simon	0:da9d848449ef	98	PSattention = 1;
simon	0:da9d848449ef	99
simon	0:da9d848449ef	100	gameByte(0x01);
simon	0:da9d848449ef	101	gameByte(0x43);
simon	0:da9d848449ef	102	gameByte(0x00);
simon	0:da9d848449ef	103	gameByte(0x00);
simon	0:da9d848449ef	104	gameByte(0x5A);
simon	0:da9d848449ef	105	gameByte(0x5A);
simon	0:da9d848449ef	106	gameByte(0x5A);
simon	0:da9d848449ef	107	gameByte(0x5A);
simon	0:da9d848449ef	108	gameByte(0x5A);
simon	0:da9d848449ef	109
simon	0:da9d848449ef	110	PScommand = 1;
simon	0:da9d848449ef	111	wait(0.000001);
simon	0:da9d848449ef	112	PSattention = 1;
simon	0:da9d848449ef	113
simon	0:da9d848449ef	114	wait(0.00001);
simon	0:da9d848449ef	115
simon	0:da9d848449ef	116	// poll controller and check in analouge mode.
simon	0:da9d848449ef	117	PScommand = 1;
simon	0:da9d848449ef	118	PSclock=1;
simon	0:da9d848449ef	119	PSattention=0;
simon	0:da9d848449ef	120
simon	0:da9d848449ef	121	gameByte(0x01);
simon	0:da9d848449ef	122	chk_ana = gameByte(0x42); // the 2nd byte to be returned from the controller should = 0x73 for "red" analouge controller.
simon	0:da9d848449ef	123	gameByte(0x00);
simon	0:da9d848449ef	124	gameByte(0x00);
simon	0:da9d848449ef	125	gameByte(0x00);
simon	0:da9d848449ef	126	gameByte(0x00);
simon	0:da9d848449ef	127	gameByte(0x00);
simon	0:da9d848449ef	128	gameByte(0x00);
simon	0:da9d848449ef	129	gameByte(0x00);
simon	0:da9d848449ef	130
simon	0:da9d848449ef	131	PScommand = 1;
simon	0:da9d848449ef	132	wait(1);
simon	0:da9d848449ef	133	PSattention =1;
simon	0:da9d848449ef	134
simon	0:da9d848449ef	135	wait(0.00001);
simon	0:da9d848449ef	136
simon	0:da9d848449ef	137
simon	0:da9d848449ef	138	// keep increasing counter to be dispalyed untill PSx controller confirms it's in analouge mode.
simon	0:da9d848449ef	139	pc.putc(cnt++);
simon	0:da9d848449ef	140	if (cnt > 254) {
simon	0:da9d848449ef	141	cnt=0;
simon	0:da9d848449ef	142	}
simon	0:da9d848449ef	143	}
simon	0:da9d848449ef	144	}
simon	0:da9d848449ef	145
simon	0:da9d848449ef	146
simon	0:da9d848449ef	147	// main program loop:
simon	0:da9d848449ef	148	void loop () {
simon	0:da9d848449ef	149
simon	0:da9d848449ef	150	PScommand=1;
simon	0:da9d848449ef	151	PSclock=1;
simon	0:da9d848449ef	152	PSattention = 0;
simon	0:da9d848449ef	153
simon	0:da9d848449ef	154	gameByte(0x01); // bite 0. header.
simon	0:da9d848449ef	155	temp = gameByte(0x42); // bite 1. header. (should possibly put test on this byte to detect unplugging of controller.)
simon	0:da9d848449ef	156	gameByte(0x00); // bite 2. header.
simon	0:da9d848449ef	157
simon	0:da9d848449ef	158	data0 = gameByte(0x00); // bite 3. first data bite.
simon	0:da9d848449ef	159	data1 = gameByte(0x00); // bite 4.
simon	0:da9d848449ef	160	data2 = gameByte(0x00); // bite 5.
simon	0:da9d848449ef	161	data3 = gameByte(0x00); // bite 6.
simon	0:da9d848449ef	162	data4 = gameByte(0x00); // bite 7.
simon	0:da9d848449ef	163	data5 = gameByte(0x00); // bite 8.
simon	0:da9d848449ef	164
simon	0:da9d848449ef	165	wait(0.000001);
simon	0:da9d848449ef	166	PScommand = 1; // close communication with PSx controller
simon	0:da9d848449ef	167	wait(0.000001);
simon	0:da9d848449ef	168	PSattention = 1; // all done.
simon	0:da9d848449ef	169
simon	0:da9d848449ef	170
simon	0:da9d848449ef	171
simon	0:da9d848449ef	172	if (!(data0 & _BV(0)) && !debounceSelect) { // capture one unique press of the "select" button
simon	0:da9d848449ef	173	debounceSelect = 1;
simon	0:da9d848449ef	174	} else if ((data0 & _BV(0)) && debounceSelect) {
simon	0:da9d848449ef	175	if (i++ >= 5) i=0;
simon	0:da9d848449ef	176	debounceSelect = 0;
simon	0:da9d848449ef	177	}
simon	0:da9d848449ef	178
simon	0:da9d848449ef	179
simon	0:da9d848449ef	180	// this switch decides which data register to show on status LEDs depending on how many times
simon	0:da9d848449ef	181	// the "select" button on the PS2 controller has been pressed.
simon	0:da9d848449ef	182	switch (i) {
simon	0:da9d848449ef	183	case 0:
simon	0:da9d848449ef	184	pc.printf("case 0: %d\n", data0);
simon	0:da9d848449ef	185	break;
simon	0:da9d848449ef	186	case 1:
simon	0:da9d848449ef	187	pc.printf("case 1: %d\n", data1);
simon	0:da9d848449ef	188	break;
simon	0:da9d848449ef	189	case 2:
simon	0:da9d848449ef	190	pc.printf("case 2: %d\n", data2);
simon	0:da9d848449ef	191	break;
simon	0:da9d848449ef	192	case 3:
simon	0:da9d848449ef	193	pc.printf("case 3: %d\n", data3);
simon	0:da9d848449ef	194	break;
simon	0:da9d848449ef	195	case 4:
simon	0:da9d848449ef	196	pc.printf("case 4: %d\n", data4);
simon	0:da9d848449ef	197	break;
simon	0:da9d848449ef	198	case 5:
simon	0:da9d848449ef	199	pc.printf("case 5: %d\n", data5);
simon	0:da9d848449ef	200	}
simon	0:da9d848449ef	201
simon	0:da9d848449ef	202
simon	0:da9d848449ef	203	} //void loop
simon	0:da9d848449ef	204
simon	0:da9d848449ef	205
simon	0:da9d848449ef	206	int main() {
simon	0:da9d848449ef	207	startup();
simon	0:da9d848449ef	208	while(1) {
simon	0:da9d848449ef	209	loop();
simon	0:da9d848449ef	210	}
simon	0:da9d848449ef	211	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	22 Nov 2009
Imports:	41
Forks:	0
Commits:	3
Dependents:	0
Dependencies:	1
Followers:	1

main.cpp@0:da9d848449ef, 2009-11-22 (annotated)

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