gps_fastlib - using Gert van der Knokke´s vga lib and Ivo van P…

Users » smayr » Code » gps_fastlib

Stefan Mayr / Mbed 2 deprecated gps_fastlib

using Gert van der Knokke´s vga lib and Ivo van Poorten´ss fastlib to receive from GPS data and display on monitor

main.cpp@0:2b28d7f11022, 2012-01-01 (annotated)

Committer:: smayr
Date:: Sun Jan 01 21:30:01 2012 +0000
Revision:: 0:2b28d7f11022
Child:: 2:794da1b39773

Who changed what in which revision?

User	Revision	Line number	New contents of line
smayr	0:2b28d7f11022	1	/*
smayr	0:2b28d7f11022	2	* 640x480 60Hz fullgraphic monochrome VGA Driver demo program
smayr	0:2b28d7f11022	3	*
smayr	0:2b28d7f11022	4	* Copyright (C) 2011 by Ivo van Poorten <ivop(at)euronet.nl>
smayr	0:2b28d7f11022	5	* and Gert van der Knokke <gertk(at)xs4all.nl>
smayr	0:2b28d7f11022	6	* This file is licensed under the terms of the GNU Lesser
smayr	0:2b28d7f11022	7	* General Public License, version 3.
smayr	0:2b28d7f11022	8	*
smayr	0:2b28d7f11022	9	* Inspired by Simon's (not Ford) Cookbook entry and Cliff Biffle's
smayr	0:2b28d7f11022	10	* assembly code.
smayr	0:2b28d7f11022	11	*/
smayr	0:2b28d7f11022	12
smayr	0:2b28d7f11022	13	#include "mbed.h"
smayr	0:2b28d7f11022	14	#include "fastlib/common.h"
smayr	0:2b28d7f11022	15	#include "fastlib/pinsel.h"
smayr	0:2b28d7f11022	16	#include "fastlib/gpio.h"
smayr	0:2b28d7f11022	17	#include "fastlib/clock.h"
smayr	0:2b28d7f11022	18	#include "fastlib/power.h"
smayr	0:2b28d7f11022	19	#include "fastlib/pwm.h"
smayr	0:2b28d7f11022	20	#include "fastlib/i2s.h"
smayr	0:2b28d7f11022	21	#include "fastlib/uart.h"
smayr	0:2b28d7f11022	22	#include "fastlib/dma.h"
smayr	0:2b28d7f11022	23	#include "fastlib/nvic.h"
smayr	0:2b28d7f11022	24
smayr	0:2b28d7f11022	25	#include "vga640x480g.h"
smayr	0:2b28d7f11022	26	#include "TextLCD.h"
smayr	0:2b28d7f11022	27
smayr	0:2b28d7f11022	28	// visual feedback
smayr	0:2b28d7f11022	29	DigitalOut myled(LED1);
smayr	0:2b28d7f11022	30	DigitalOut led2(LED2);
smayr	0:2b28d7f11022	31	DigitalOut led3(LED3);
smayr	0:2b28d7f11022	32	DigitalOut led4(LED4); // Data sent LED
smayr	0:2b28d7f11022	33
smayr	0:2b28d7f11022	34	// Commands for SIRF III GPS
smayr	0:2b28d7f11022	35	// to turn on or off data strings
smayr	0:2b28d7f11022	36	#define GGA_ON "$PSRF103,00,00,01,01*25\r\n"
smayr	0:2b28d7f11022	37	#define GGA_OFF "$PSRF103,00,00,00,01*24\r\n"
smayr	0:2b28d7f11022	38	#define GLL_ON "$PSRF103,01,00,01,01*24\r\n"
smayr	0:2b28d7f11022	39	#define GLL_OFF "$PSRF103,01,00,00,01*25\r\n"
smayr	0:2b28d7f11022	40	#define GSA_ON "$PSRF103,02,00,01,01*27\r\n"
smayr	0:2b28d7f11022	41	#define GSA_OFF "$PSRF103,02,00,00,01*26\r\n"
smayr	0:2b28d7f11022	42	#define GSV_ON "$PSRF103,03,00,05,01*22\r\n"
smayr	0:2b28d7f11022	43	#define GSV_OFF "$PSRF103,03,00,00,01*27\r\n"
smayr	0:2b28d7f11022	44	#define RMC_ON "$PSRF103,04,00,01,01*21\r\n"
smayr	0:2b28d7f11022	45	#define RMC_OFF "$PSRF103,04,00,00,01*20\r\n"
smayr	0:2b28d7f11022	46	#define VTG_ON "$PSRF103,05,00,01,01*20\r\n"
smayr	0:2b28d7f11022	47	#define VTG_OFF "$PSRF103,05,00,00,01*21\r\n"
smayr	0:2b28d7f11022	48	//#define WAAS_ON "$PSRF151,1*3F\r\n"
smayr	0:2b28d7f11022	49	//#define WAAS_OFF "$PSRF151,0*3E\r\n"
smayr	0:2b28d7f11022	50	#define UARTPORT 3
smayr	0:2b28d7f11022	51
smayr	0:2b28d7f11022	52	// Set up serial ports and LEDs
smayr	0:2b28d7f11022	53	// SIRF GPS on Pin28 and Pin7
smayr	0:2b28d7f11022	54	//Serial gps(p9, p10); // tx, rx - 4800 baud required
smayr	0:2b28d7f11022	55
smayr	0:2b28d7f11022	56	//TextLCD lcd(p15, p16, p17, p18, p19, p20); // rs, e, d0-d3
smayr	0:2b28d7f11022	57
smayr	0:2b28d7f11022	58	//char buffidx;
smayr	0:2b28d7f11022	59	char vgatxtbuff[80]; // Data buffer for VGA output
smayr	0:2b28d7f11022	60	char msg[256]; // GPS data buffer
smayr	0:2b28d7f11022	61	char status; // GPS status 'V' = Not locked; 'A' = Locked
smayr	0:2b28d7f11022	62	char *parseptr; // Pointer for parsing GPS message
smayr	0:2b28d7f11022	63	char time_buff[7] = "000000";
smayr	0:2b28d7f11022	64	char date_buff[7] = "000000";
smayr	0:2b28d7f11022	65	char sens_buff[7] = "123456";
smayr	0:2b28d7f11022	66	int i;
smayr	0:2b28d7f11022	67
smayr	0:2b28d7f11022	68	void putcharact(char chardata) {
smayr	0:2b28d7f11022	69
smayr	0:2b28d7f11022	70	while ((fl_uart_get_line_status(UARTPORT)& 0x60)==0) {
smayr	0:2b28d7f11022	71
smayr	0:2b28d7f11022	72	}
smayr	0:2b28d7f11022	73	*FL_UART(UARTPORT, THR)= chardata;
smayr	0:2b28d7f11022	74	}
smayr	0:2b28d7f11022	75	char getcharact(void) {
smayr	0:2b28d7f11022	76	while ((fl_uart_get_line_status(UARTPORT)& 0x01)==0) {
smayr	0:2b28d7f11022	77	}
smayr	0:2b28d7f11022	78	return fl_uart_receive_byte(UARTPORT);
smayr	0:2b28d7f11022	79	}
smayr	0:2b28d7f11022	80
smayr	0:2b28d7f11022	81	// Switch off all but $GPRMC string
smayr	0:2b28d7f11022	82	void setgps() {
smayr	0:2b28d7f11022	83	sprintf(msg,GGA_ON);
smayr	0:2b28d7f11022	84	i=0;
smayr	0:2b28d7f11022	85	while (msg[i]!= 0) {
smayr	0:2b28d7f11022	86	putcharact(msg[i]);
smayr	0:2b28d7f11022	87	i++;
smayr	0:2b28d7f11022	88	}
smayr	0:2b28d7f11022	89	sprintf(msg,GLL_ON);
smayr	0:2b28d7f11022	90	i=0;
smayr	0:2b28d7f11022	91	while (msg[i]!= 0) {
smayr	0:2b28d7f11022	92	putcharact(msg[i]);
smayr	0:2b28d7f11022	93	i++;
smayr	0:2b28d7f11022	94	}
smayr	0:2b28d7f11022	95	sprintf(msg,GSA_ON);
smayr	0:2b28d7f11022	96	i=0;
smayr	0:2b28d7f11022	97	while (msg[i]!= 0) {
smayr	0:2b28d7f11022	98	putcharact(msg[i]);
smayr	0:2b28d7f11022	99	i++;
smayr	0:2b28d7f11022	100	}
smayr	0:2b28d7f11022	101	sprintf(msg,GSV_ON);
smayr	0:2b28d7f11022	102	i=0;
smayr	0:2b28d7f11022	103	while (msg[i]!= 0) {
smayr	0:2b28d7f11022	104	putcharact(msg[i]);
smayr	0:2b28d7f11022	105	i++;
smayr	0:2b28d7f11022	106	}
smayr	0:2b28d7f11022	107	sprintf(msg,RMC_ON);
smayr	0:2b28d7f11022	108	i=0;
smayr	0:2b28d7f11022	109	while (msg[i]!= 0) {
smayr	0:2b28d7f11022	110	putcharact(msg[i]);
smayr	0:2b28d7f11022	111	i++;
smayr	0:2b28d7f11022	112	}
smayr	0:2b28d7f11022	113	sprintf(msg,VTG_ON);
smayr	0:2b28d7f11022	114	i=0;
smayr	0:2b28d7f11022	115	while (msg[i]!= 0) {
smayr	0:2b28d7f11022	116	putcharact(msg[i]);
smayr	0:2b28d7f11022	117	i++;
smayr	0:2b28d7f11022	118	}
smayr	0:2b28d7f11022	119	// gps.printf(WAAS_OFF);
smayr	0:2b28d7f11022	120	return;
smayr	0:2b28d7f11022	121	}
smayr	0:2b28d7f11022	122
smayr	0:2b28d7f11022	123	// Get line of data from GPS
smayr	0:2b28d7f11022	124	void getline() {
smayr	0:2b28d7f11022	125	while (getcharact() != '$'); // Wait for start of line
smayr	0:2b28d7f11022	126	for (int i=0; i<256; i++) {
smayr	0:2b28d7f11022	127	msg[i] = getcharact();
smayr	0:2b28d7f11022	128	if (msg[i] == '\r') {
smayr	0:2b28d7f11022	129	msg[i] = 0;
smayr	0:2b28d7f11022	130	return;
smayr	0:2b28d7f11022	131	}
smayr	0:2b28d7f11022	132	}
smayr	0:2b28d7f11022	133	}
smayr	0:2b28d7f11022	134
smayr	0:2b28d7f11022	135
smayr	0:2b28d7f11022	136	float trunc(float v) {
smayr	0:2b28d7f11022	137	if(v < 0.0) {
smayr	0:2b28d7f11022	138	v*= -1.0;
smayr	0:2b28d7f11022	139	v = floor(v);
smayr	0:2b28d7f11022	140	v*=-1.0;
smayr	0:2b28d7f11022	141	} else {
smayr	0:2b28d7f11022	142	v = floor(v);
smayr	0:2b28d7f11022	143	}
smayr	0:2b28d7f11022	144	return v;
smayr	0:2b28d7f11022	145	}
smayr	0:2b28d7f11022	146
smayr	0:2b28d7f11022	147	/** The longitude (call sample() to set) */
smayr	0:2b28d7f11022	148	float longitude;
smayr	0:2b28d7f11022	149	/** The latitude (call sample() to set) */
smayr	0:2b28d7f11022	150	float latitude;
smayr	0:2b28d7f11022	151	float gps_time;
smayr	0:2b28d7f11022	152	char ns, ew;
smayr	0:2b28d7f11022	153	int lock,sat_used;
smayr	0:2b28d7f11022	154	float HDOP;
smayr	0:2b28d7f11022	155	float altitude;
smayr	0:2b28d7f11022	156
smayr	0:2b28d7f11022	157	int toggle_flag=0;
smayr	0:2b28d7f11022	158	int gps_hour;
smayr	0:2b28d7f11022	159	int gps_min;
smayr	0:2b28d7f11022	160	int gps_sec;
smayr	0:2b28d7f11022	161	int s;
smayr	0:2b28d7f11022	162	unsigned power_state;
smayr	0:2b28d7f11022	163
smayr	0:2b28d7f11022	164	int main() {
smayr	0:2b28d7f11022	165	// init the VGA subsystem (always do this first!)
smayr	0:2b28d7f11022	166	init_vga();
smayr	0:2b28d7f11022	167	setbuf(stdout, NULL); // no buffering for this filehandle
smayr	0:2b28d7f11022	168
smayr	0:2b28d7f11022	169	// gps.baud(4800); // NB GPS baud rate 4800
smayr	0:2b28d7f11022	170	fl_power_uart3(FL_ON);
smayr	0:2b28d7f11022	171	fl_select_clock_uart3(FL_CLOCK_DIV1);
smayr	0:2b28d7f11022	172	*FL_UART(UARTPORT, LCR) = 0x00000083; //DLAB 1 for access to divisors
smayr	0:2b28d7f11022	173	fl_uart_set_fractional_divider(UARTPORT, 0, 0);
smayr	0:2b28d7f11022	174	fl_uart_set_divisor_latch(UARTPORT, 1302);
smayr	0:2b28d7f11022	175	*FL_UART(UARTPORT, FCR) = 0x00000007; // FIFO enable (must) and clear FIFOs
smayr	0:2b28d7f11022	176	*FL_UART(UARTPORT, LCR) = 0x00000003; // DLAB 0
smayr	0:2b28d7f11022	177	*FL_UART(UARTPORT, IER) = 0x00000000; // no interrupts
smayr	0:2b28d7f11022	178	fl_pinsel(0, 0, FL_FUNC_ALT2, FL_IGNORE, FL_IGNORE); // TX3
smayr	0:2b28d7f11022	179	fl_pinsel(0, 1, FL_FUNC_ALT2, FL_IGNORE, FL_IGNORE); // RX3
smayr	0:2b28d7f11022	180	fl_uart_transmitter_enable(UARTPORT, 1);
smayr	0:2b28d7f11022	181
smayr	0:2b28d7f11022	182	setgps();
smayr	0:2b28d7f11022	183
smayr	0:2b28d7f11022	184
smayr	0:2b28d7f11022	185	// clear the screen
smayr	0:2b28d7f11022	186	vga_cls();
smayr	0:2b28d7f11022	187	// circumfence the screen
smayr	0:2b28d7f11022	188	vga_box(0,0,639,479,WHITE);
smayr	0:2b28d7f11022	189	vga_putstring(400,370,"GPS DEMO",WHITE);
smayr	0:2b28d7f11022	190	/* // put a string on screen
smayr	0:2b28d7f11022	191	for (s=0; s<150; s++) {
smayr	0:2b28d7f11022	192	vga_putstring(400,370-s,"GPS DEMO",WHITE);
smayr	0:2b28d7f11022	193	wait(0.01);
smayr	0:2b28d7f11022	194	vga_putstring(400,370-s,"GPS DEMO",BLACK);
smayr	0:2b28d7f11022	195	}
smayr	0:2b28d7f11022	196	for (s=0; s<150; s++) {
smayr	0:2b28d7f11022	197	vga_putstring(400-s,220,"GPS DEMO",WHITE);
smayr	0:2b28d7f11022	198	wait(0.01);
smayr	0:2b28d7f11022	199	vga_putstring(400-s,220,"GPS DEMO",BLACK);
smayr	0:2b28d7f11022	200	}
smayr	0:2b28d7f11022	201	for (s=0; s<150; s++) {
smayr	0:2b28d7f11022	202	vga_putstring(250,220+s,"GPS DEMO",WHITE);
smayr	0:2b28d7f11022	203	wait(0.01);
smayr	0:2b28d7f11022	204	vga_putstring(250,220+s,"GPS DEMO",BLACK);
smayr	0:2b28d7f11022	205	}
smayr	0:2b28d7f11022	206	for (s=0; s<150; s++) {
smayr	0:2b28d7f11022	207	vga_putstring(250+s,370,"GPS DEMO",WHITE);
smayr	0:2b28d7f11022	208	wait(0.01);
smayr	0:2b28d7f11022	209	vga_putstring(250+s,370,"GPS DEMO",BLACK);
smayr	0:2b28d7f11022	210	}
smayr	0:2b28d7f11022	211	wait(1);
smayr	0:2b28d7f11022	212	for (s=0;s<30;s++){
smayr	0:2b28d7f11022	213	vga_putstring(400,370,"GPS DEMO",WHITE);
smayr	0:2b28d7f11022	214	wait(.1);
smayr	0:2b28d7f11022	215	vga_putstring(400,370,"GPS DEMO",BLACK);
smayr	0:2b28d7f11022	216	wait(.1);
smayr	0:2b28d7f11022	217	}
smayr	0:2b28d7f11022	218	*/
smayr	0:2b28d7f11022	219
smayr	0:2b28d7f11022	220	vga_putstring(10,50,"CGA",WHITE);
smayr	0:2b28d7f11022	221	vga_putstring(10,70,"GLL",WHITE);
smayr	0:2b28d7f11022	222	vga_putstring(10,90,"GSA",WHITE);
smayr	0:2b28d7f11022	223	vga_putstring(10,110,"GSV",WHITE);
smayr	0:2b28d7f11022	224	vga_putstring(10,130,"RMC",WHITE);
smayr	0:2b28d7f11022	225	vga_putstring(10,150,"RMC",WHITE);
smayr	0:2b28d7f11022	226
smayr	0:2b28d7f11022	227
smayr	0:2b28d7f11022	228
smayr	0:2b28d7f11022	229	while (1) {
smayr	0:2b28d7f11022	230	led4=1;
smayr	0:2b28d7f11022	231	getline();
smayr	0:2b28d7f11022	232	if (sscanf(msg,"GPGGA,%s", &vgatxtbuff)>=1){
smayr	0:2b28d7f11022	233	vga_putstring(50,50,vgatxtbuff,WHITE);
smayr	0:2b28d7f11022	234	}
smayr	0:2b28d7f11022	235	if (sscanf(msg,"GPGLL,%s", &vgatxtbuff)>=1){
smayr	0:2b28d7f11022	236	vga_putstring(50,70,vgatxtbuff,WHITE);
smayr	0:2b28d7f11022	237	}
smayr	0:2b28d7f11022	238	if (sscanf(msg,"GPGSA,%s", &vgatxtbuff)>=1){
smayr	0:2b28d7f11022	239	vga_putstring(50,90,vgatxtbuff,WHITE);
smayr	0:2b28d7f11022	240	}
smayr	0:2b28d7f11022	241	if (sscanf(msg,"GPGSV,%s", &vgatxtbuff)>=1){
smayr	0:2b28d7f11022	242	vga_putstring(50,110,vgatxtbuff,WHITE);
smayr	0:2b28d7f11022	243	}
smayr	0:2b28d7f11022	244	if (sscanf(msg,"GPRMC,%s", &vgatxtbuff)>=1){
smayr	0:2b28d7f11022	245	vga_putstring(50,130,vgatxtbuff,WHITE);
smayr	0:2b28d7f11022	246	}
smayr	0:2b28d7f11022	247	if (sscanf(msg,"GPVTG,%s", &vgatxtbuff)>=1){
smayr	0:2b28d7f11022	248	vga_putstring(50,150,vgatxtbuff,WHITE);
smayr	0:2b28d7f11022	249	}
smayr	0:2b28d7f11022	250	// Check if it is a GPGGA msg (matches both locked and non-locked msg)
smayr	0:2b28d7f11022	251	if(sscanf(msg, "GPGGA,%f,%f,%c,%f,%c,%d,%d,%f,%f", &gps_time, &latitude, &ns, &longitude, &ew, &lock, &sat_used, &HDOP, &altitude) >= 1) {
smayr	0:2b28d7f11022	252	if(!lock) {
smayr	0:2b28d7f11022	253	led4 = 1;
smayr	0:2b28d7f11022	254	longitude = 0.0;
smayr	0:2b28d7f11022	255	latitude = 0.0;
smayr	0:2b28d7f11022	256	} else {
smayr	0:2b28d7f11022	257	led4 = 0;
smayr	0:2b28d7f11022	258	if(ns == 'S') { latitude *= -1.0; }
smayr	0:2b28d7f11022	259	if(ew == 'W') { longitude *= -1.0; }
smayr	0:2b28d7f11022	260	float degrees = trunc(latitude / 100.0f);
smayr	0:2b28d7f11022	261	float minutes = latitude - (degrees * 100.0f);
smayr	0:2b28d7f11022	262	latitude = degrees + minutes / 60.0f;
smayr	0:2b28d7f11022	263	degrees = trunc(longitude / 100.0f);
smayr	0:2b28d7f11022	264	minutes = longitude - (degrees * 100.0f);
smayr	0:2b28d7f11022	265	longitude = degrees + minutes / 60.0f;
smayr	0:2b28d7f11022	266	gps_hour = trunc(gps_time/10000.0f);
smayr	0:2b28d7f11022	267	gps_min = trunc((gps_time - gps_hour*10000.0f)/100.0f);
smayr	0:2b28d7f11022	268	gps_sec = trunc(gps_time-gps_hour10000.0f-gps_min100.0f);
smayr	0:2b28d7f11022	269	gps_hour++;
smayr	0:2b28d7f11022	270	if (gps_hour>=24) {
smayr	0:2b28d7f11022	271	gps_hour=0;
smayr	0:2b28d7f11022	272	}
smayr	0:2b28d7f11022	273	}
smayr	0:2b28d7f11022	274	sprintf(vgatxtbuff, "lat: %3.7f long: %3.7f time: %2.4f sat_used: %d alt: %5.3f",latitude, longitude,gps_time, sat_used, altitude);
smayr	0:2b28d7f11022	275	vga_putstring(10,30,vgatxtbuff,WHITE);
smayr	0:2b28d7f11022	276	}
smayr	0:2b28d7f11022	277	}
smayr	0:2b28d7f11022	278	}
smayr	0:2b28d7f11022	279

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	01 Jan 2012
Imports:	10
Forks:	0
Commits:	3
Dependents:	0
Dependencies:	3
Followers:	2

main.cpp@0:2b28d7f11022, 2012-01-01 (annotated)

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