Kenji Arai
GPS Data Logger with SD File system. Logger can save RMC & GGA data from GPS and five channels of analog data. Based on http://mbed.org/users/prf/ "GPS_Logger_01" by Peter Forden
Diff: main.cpp
- Revision:
- 0:dc3be3264d2d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Apr 17 13:27:34 2010 +0000
@@ -0,0 +1,274 @@
+//-------------------------------------------------------------------------------------------------
+// GPS DATA LOGGER Ver.1
+// (c)2010 Kenji Arai / JH1PJL
+// http://www.page.sannet.ne.jp/kenjia/index.html
+// http://mbed.org/users/kenjiArai/
+// April 17th,2010 Started
+// April 17th,2010
+//-------------------------------------------------------------------------------------------------
+// Reference ----- GPS_logger_01 by Peter Foden ------
+// http://mbed.org/users/prf/
+// http://mbed.org/users/prf/programs/GPS_Logger_01/f5c2b003ae38423640de0fc5e0727190/
+//-------------------------------------------------------------------------------------------------
+// Function
+// GPS data and five channeles ADC data records into a file which is located in SD-Card
+// Connection
+// GPS receiver PIN 8,9
+// Analog input PIN 15,16,17,19,20
+// SD Card I/F PIN 11,12,13,14
+// LCD PIN 5,6,7,21,22,23
+// -> CAUTION!! pin assignment is different
+// with " http://mbed.org/projects/cookbook/wiki/TextLCD "
+// RTC PIN 3 needs to connect 3V Battery
+// -> Please refer my program " RTC_w_COM" for time adjustment
+// at " http://mbed.org/users/kenjiArai/programs/RTC_w_COM/5yi9a/ "
+//-------------------------------------------------------------------------------------------------
+#include "mbed.h"
+#include "TextLCD.h"
+#include "SDFileSystem.h"
+
+// Data logging configration
+// Save RMC any condition
+#define CONFG_ANA 1 // 1= Save Analog data
+#define DEBUG 1 // 1= Shows progress on PC via USB ( virtual COM line)
+#define USE_LCD 1 // 1= Display the data on LCD
+
+// Commands for GPS to turn on or off data strings
+#define RMC_ON "$PSRF103,4,0,1,1*21\r\n"
+#define RMC_OFF "$PSRF103,4,0,0,1*20\r\n"
+#define GGA_ON "$PSRF103,0,0,1,1*25\r\n"
+#define GGA_OFF "$PSRF103,0,0,0,1*24\r\n"
+#define GSA_ON "$PSRF103,2,0,1,1*27\r\n"
+#define GSA_OFF "$PSRF103,2,0,0,1*26\r\n"
+#define GSV_ON "$PSRF103,3,0,1,1*26\r\n"
+#define GSV_OFF "$PSRF103,3,0,0,1*27\r\n"
+#define WAAS_ON "$PSRF151,1*3F\r\n"
+#define WAAS_OFF "$PSRF151,0*3E\r\n"
+
+// kind of GPS data
+#define NONE 0
+#define RMC 1
+#define GGA 2
+#define GSA 3
+#define GSV 4
+
+// SD Recording status
+#define IDLE 0
+#define RECD 1
+#define SD_FAIL 0xff
+
+// Buffer size
+#define BSIZ 256
+
+//-------------------------------------------------------------------------------------------------
+// Set up hardware
+// MBED USB port used for console debug messages
+// SZP950T GPS unit connects to UART
+// LED & Switch
+// 40chr x 2 line Text LCD
+// SD card interface
+// Analog input
+// G-sensor data, Baterry volt, Temperature sensor data
+#if DEBUG
+Serial pc(USBTX, USBRX); // tx, rx - Default 9600 baud
+#endif
+Serial gps(p9, p10); // tx, rx - 4800 baud required
+DigitalOut RCV_GPS(LED1); // Receive GPS data
+DigitalOut GPS_LOCK(LED2); // GPS got valid data
+DigitalOut ON_REC(LED4); // Data sent LED
+DigitalIn SW_REC(p26); // Data recode switch
+#if USE_LCD
+TextLCD lcd(p22, p23, p21, p8, p7, p6, p5, 40, 2); // rs,rw,e,d0,d1,d2,d3,40char's x 2 lines
+#endif
+SDFileSystem sd(p11, p12, p13, p14, "sd"); // do,di,clk,cs
+#if CONFG_ANA
+AnalogIn ain_G_X(p15); // G Sensor
+AnalogIn ain_G_Y(p16); // G Sensor
+AnalogIn ain_G_Z(p17); // G Sensor
+AnalogIn ain_BAT(p19); // Battery Volt
+AnalogIn ain_TEMP(p20); // Temperature Sensor
+#endif
+
+//-------------------------------------------------------------------------------------------------
+// Data rea
+char msg[BSIZ]; //GPS data buffer
+char MsgBuf_RMC[BSIZ]; // GPS/GGA data
+char MsgBuf_GGA[BSIZ]; // GPS/RMC data
+#if CONFG_ANA
+char MsgBuf_ANA[128]; // Analog data buffer
+float x,y,z,b,t; // Analog data
+#endif
+char gps_dat; // Kind of GPS data
+char recode_status;
+FILE *fp; // File pointer
+char buf[40]; // data buffer for text
+time_t seconds; // RTC data based on seconds
+
+//-------------------------------------------------------------------------------------------------
+// --------------- CONTROL PROGRAM --------------------
+
+// Select GPS data
+void setgps() {
+ gps.printf(RMC_ON); // use RMC
+ gps.printf(GGA_ON); // use GGA
+ gps.printf(GSA_OFF);
+ gps.printf(GSV_OFF);
+ gps.printf(WAAS_OFF);
+ return;
+}
+
+// Get line of data from GPS
+void getline() {
+ while (gps.getc() != '$'); // Wait for start of line
+ msg[0] = '$';
+#if DEBUG
+ pc.putc('$');
+#endif
+ for (int i=1; i<512; i++) {
+ msg[i] = gps.getc();
+ #if DEBUG
+ pc.putc(msg[i]);
+ #endif
+ if (msg[i] == '\r' || msg[i] == '\n') {
+ msg[i] = '\r';
+ msg[i+1] = '\n';
+ msg[i+2] = 0;
+ #if DEBUG
+ pc.printf("\r\n");
+ #endif
+ return;
+ }
+ }
+}
+
+int main(void) {
+ gps.baud(4800); // baud rate 4800
+#if DEBUG
+ pc.printf("\r\n\r\nGPS logger on mbed by K.Arai/JH1PJL (c)2010\r\n");
+#endif
+#if USE_LCD
+ lcd.cls();
+ lcd.locate(0, 0);
+ // 1234567890123456789012345678901234567890
+ lcd.printf("GPS Logger Running! .... ");
+#endif
+ setgps();
+ while (1) {
+ RCV_GPS = 1;
+ getline(); // Get GPS data from UART
+ if (strncmp(msg, "$GPRMC",6) == 0) {
+ for (int i=0; i<BSIZ ; MsgBuf_RMC[i++]=0); // Clear buffer
+ for (int i=0; msg[i] != 0; i++) { // Copy msg to RMC buffer
+ MsgBuf_RMC[i] = msg[i];
+ }
+ gps_dat = RMC;
+ // Get analog data from each port
+ #if CONFG_ANA
+ x=ain_G_X.read();
+ y=ain_G_Y.read();
+ z=ain_G_Z.read();
+ b=ain_BAT.read();
+ t=ain_TEMP.read();
+ sprintf(MsgBuf_ANA, "$ANA,%f,%f,%f,%f,%f,,*00\r\n", x, y, z, b, t);
+ #if DEBUG
+ pc.printf(MsgBuf_ANA);
+ #endif
+ #endif
+ } else if (strncmp(msg, "$GPGGA",6) == 0) {
+ for (int i=0; i<BSIZ ; MsgBuf_GGA[i++]=0); // Clear buffer
+ for (int i=0; msg[i] != 0; i++) { // Copy msg to GGA buffer
+ MsgBuf_GGA[i] = msg[i];
+ }
+ gps_dat = GGA;
+ } else {
+ gps_dat = NONE;
+ }
+ RCV_GPS = 0;
+ if (SW_REC){
+ if (recode_status == RECD){
+ // Recording -> on going
+ ON_REC = 1; // LED ON for recording indication
+ switch(gps_dat){
+ case RMC: {
+ fprintf(fp,MsgBuf_RMC); // save data
+ #if CONFG_ANA
+ fprintf(fp,MsgBuf_ANA); // save data
+ #endif
+ break;
+ }
+ case GGA: {
+ fprintf(fp,MsgBuf_GGA); // save data
+ break;
+ }
+ default: {;}
+ }
+ } else if (recode_status == IDLE){
+ // Start recoding -> File open
+ seconds = time(NULL);
+ seconds %= 100000000; // Adjust 8 charcters file name
+ sprintf(buf,"/sd/%d.txt",seconds); // File name based on time from 1970/1/1
+ fp = fopen(buf, "w"); // File open
+ #if DEBUG
+ pc.printf("\r\n %s \r\n", buf); // File name on the screen
+ #endif
+ if(fp == NULL) {
+ // Try again
+ fp = fopen(buf, "w");
+ if(fp == NULL) {
+ // File not open then give up
+ #if USE_LCD
+ lcd.locate(0, 0);
+ // 1234567890123456789012345678901234567890
+ lcd.printf(" Could not open file for write ");
+ #endif
+ #if DEBUG
+ pc.printf( "\r\n Could not open file for write\r\n");
+ #endif
+ recode_status = SD_FAIL;
+ }
+ }
+ if (fp){
+ // File open successful
+ fprintf(fp, "GPS logger on mbed by K.Arai/JH1PJL (c)2010\r\n");
+ #if USE_LCD
+ lcd.locate(0, 0);
+ // 1234567890123456789012345678901234567890
+ lcd.printf(" Start recording ");
+ #endif
+ #if DEBUG
+ pc.printf( "GPS logger on mbed by K.Arai/JH1PJL (c)2010");
+ pc.printf("\r\nStart recording\r\n");
+ #endif
+ recode_status = RECD;
+ }
+ }
+ } else {
+ if (recode_status == RECD){
+ // File close
+ fclose(fp);
+ recode_status = IDLE; // back to idle state
+ #if USE_LCD
+ lcd.locate(0, 0);
+ // 1234567890123456789012345678901234567890
+ lcd.printf("Finish data save ");
+ #endif
+ #if DEBUG
+ pc.printf( "\r\n Finish data save\r\n");
+ #endif
+ } else if (recode_status == SD_FAIL){
+ // When file access failed
+ recode_status = IDLE; // back to idle state
+ #if USE_LCD
+ lcd.locate(0, 0);
+ // 1234567890123456789012345678901234567890
+ lcd.printf("Could not save the data ");
+ #endif
+ #if DEBUG
+ pc.printf( "\r\n Could not save the data\r\n");
+ #endif
+ }
+ ON_REC = 0; // LED off for IDLE
+ }
+ }
+}
+