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
Revision 0:dc3be3264d2d, committed 2010-04-17
- Comitter:
- kenjiArai
- Date:
- Sat Apr 17 13:27:34 2010 +0000
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FATFileSystem.lib Sat Apr 17 13:27:34 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_unsupported/code/fatfilesystem/ \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SDFileSystem.cpp Sat Apr 17 13:27:34 2010 +0000
@@ -0,0 +1,441 @@
+/* mbed Microcontroller Library - SDFileSystem
+ * Copyright (c) 2008-2009, sford
+ */
+
+// VERY DRAFT CODE! Needs serious rework/refactoring
+
+/* Introduction
+ * ------------
+ * SD and MMC cards support a number of interfaces, but common to them all
+ * is one based on SPI. This is the one I'm implmenting because it means
+ * it is much more portable even though not so performant, and we already
+ * have the mbed SPI Interface!
+ *
+ * The main reference I'm using is Chapter 7, "SPI Mode" of:
+ * http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf
+ *
+ * SPI Startup
+ * -----------
+ * The SD card powers up in SD mode. The SPI interface mode is selected by
+ * asserting CS low and sending the reset command (CMD0). The card will
+ * respond with a (R1) response.
+ *
+ * CMD8 is optionally sent to determine the voltage range supported, and
+ * indirectly determine whether it is a version 1.x SD/non-SD card or
+ * version 2.x. I'll just ignore this for now.
+ *
+ * ACMD41 is repeatedly issued to initialise the card, until "in idle"
+ * (bit 0) of the R1 response goes to '0', indicating it is initialised.
+ *
+ * You should also indicate whether the host supports High Capicity cards,
+ * and check whether the card is high capacity - i'll also ignore this
+ *
+ * SPI Protocol
+ * ------------
+ * The SD SPI protocol is based on transactions made up of 8-bit words, with
+ * the host starting every bus transaction by asserting the CS signal low. The
+ * card always responds to commands, data blocks and errors.
+ *
+ * The protocol supports a CRC, but by default it is off (except for the
+ * first reset CMD0, where the CRC can just be pre-calculated, and CMD8)
+ * I'll leave the CRC off I think!
+ *
+ * Standard capacity cards have variable data block sizes, whereas High
+ * Capacity cards fix the size of data block to 512 bytes. I'll therefore
+ * just always use the Standard Capacity cards with a block size of 512 bytes.
+ * This is set with CMD16.
+ *
+ * You can read and write single blocks (CMD17, CMD25) or multiple blocks
+ * (CMD18, CMD25). For simplicity, I'll just use single block accesses. When
+ * the card gets a read command, it responds with a response token, and then
+ * a data token or an error.
+ *
+ * SPI Command Format
+ * ------------------
+ * Commands are 6-bytes long, containing the command, 32-bit argument, and CRC.
+ *
+ * +---------------+------------+------------+-----------+----------+--------------+
+ * | 01 | cmd[5:0] | arg[31:24] | arg[23:16] | arg[15:8] | arg[7:0] | crc[6:0] | 1 |
+ * +---------------+------------+------------+-----------+----------+--------------+
+ *
+ * As I'm not using CRC, I can fix that byte to what is needed for CMD0 (0x95)
+ *
+ * All Application Specific commands shall be preceded with APP_CMD (CMD55).
+ *
+ * SPI Response Format
+ * -------------------
+ * The main response format (R1) is a status byte (normally zero). Key flags:
+ * idle - 1 if the card is in an idle state/initialising
+ * cmd - 1 if an illegal command code was detected
+ *
+ * +-------------------------------------------------+
+ * R1 | 0 | arg | addr | seq | crc | cmd | erase | idle |
+ * +-------------------------------------------------+
+ *
+ * R1b is the same, except it is followed by a busy signal (zeros) until
+ * the first non-zero byte when it is ready again.
+ *
+ * Data Response Token
+ * -------------------
+ * Every data block written to the card is acknowledged by a byte
+ * response token
+ *
+ * +----------------------+
+ * | xxx | 0 | status | 1 |
+ * +----------------------+
+ * 010 - OK!
+ * 101 - CRC Error
+ * 110 - Write Error
+ *
+ * Single Block Read and Write
+ * ---------------------------
+ *
+ * Block transfers have a byte header, followed by the data, followed
+ * by a 16-bit CRC. In our case, the data will always be 512 bytes.
+ *
+ * +------+---------+---------+- - - -+---------+-----------+----------+
+ * | 0xFE | data[0] | data[1] | | data[n] | crc[15:8] | crc[7:0] |
+ * +------+---------+---------+- - - -+---------+-----------+----------+
+ */
+
+#include "SDFileSystem.h"
+
+#define SD_COMMAND_TIMEOUT 5000
+
+SDFileSystem::SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name) :
+ FATFileSystem(name), _spi(mosi, miso, sclk), _cs(cs) {
+ _cs = 1;
+}
+
+#define R1_IDLE_STATE (1 << 0)
+#define R1_ERASE_RESET (1 << 1)
+#define R1_ILLEGAL_COMMAND (1 << 2)
+#define R1_COM_CRC_ERROR (1 << 3)
+#define R1_ERASE_SEQUENCE_ERROR (1 << 4)
+#define R1_ADDRESS_ERROR (1 << 5)
+#define R1_PARAMETER_ERROR (1 << 6)
+
+// Types
+// - v1.x Standard Capacity
+// - v2.x Standard Capacity
+// - v2.x High Capacity
+// - Not recognised as an SD Card
+
+#define SDCARD_FAIL 0
+#define SDCARD_V1 1
+#define SDCARD_V2 2
+#define SDCARD_V2HC 3
+
+int SDFileSystem::initialise_card() {
+ // Set to 100kHz for initialisation, and clock card with cs = 1
+ _spi.frequency(100000);
+ _cs = 1;
+ for(int i=0; i<16; i++) {
+ _spi.write(0xFF);
+ }
+
+ // send CMD0, should return with all zeros except IDLE STATE set (bit 0)
+ if(_cmd(0, 0) != R1_IDLE_STATE) {
+ fprintf(stderr, "No disk, or could not put SD card in to SPI idle state\n");
+ return SDCARD_FAIL;
+ }
+
+ // send CMD8 to determine whther it is ver 2.x
+ int r = _cmd8();
+ if(r == R1_IDLE_STATE) {
+ return initialise_card_v2();
+ } else if(r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) {
+ return initialise_card_v1();
+ } else {
+ fprintf(stderr, "Not in idle state after sending CMD8 (not an SD card?)\n");
+ return SDCARD_FAIL;
+ }
+}
+
+int SDFileSystem::initialise_card_v1() {
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ _cmd(55, 0);
+ if(_cmd(41, 0) == 0) {
+ return SDCARD_V1;
+ }
+ }
+
+ fprintf(stderr, "Timeout waiting for v1.x card\n");
+ return SDCARD_FAIL;
+}
+
+int SDFileSystem::initialise_card_v2() {
+
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ _cmd(55, 0);
+ if(_cmd(41, 0) == 0) {
+ _cmd58();
+ return SDCARD_V2;
+ }
+ }
+
+ fprintf(stderr, "Timeout waiting for v2.x card\n");
+ return SDCARD_FAIL;
+}
+
+int SDFileSystem::disk_initialize() {
+
+ int i = initialise_card();
+// printf("init card = %d\n", i);
+// printf("OK\n");
+
+ _sectors = _sd_sectors();
+
+ // Set block length to 512 (CMD16)
+ if(_cmd(16, 512) != 0) {
+ fprintf(stderr, "Set 512-byte block timed out\n");
+ return 1;
+ }
+
+ _spi.frequency(1000000); // Set to 1MHz for data transfer
+ return 0;
+}
+
+int SDFileSystem::disk_write(const char *buffer, int block_number) {
+ // set write address for single block (CMD24)
+ if(_cmd(24, block_number * 512) != 0) {
+ return 1;
+ }
+
+ // send the data block
+ _write(buffer, 512);
+ return 0;
+}
+
+int SDFileSystem::disk_read(char *buffer, int block_number) {
+ // set read address for single block (CMD17)
+ if(_cmd(17, block_number * 512) != 0) {
+ return 1;
+ }
+
+ // receive the data
+ _read(buffer, 512);
+ return 0;
+}
+
+int SDFileSystem::disk_status() { return 0; }
+int SDFileSystem::disk_sync() { return 0; }
+int SDFileSystem::disk_sectors() { return _sectors; }
+
+// PRIVATE FUNCTIONS
+
+int SDFileSystem::_cmd(int cmd, int arg) {
+ _cs = 0;
+
+ // send a command
+ _spi.write(0x40 | cmd);
+ _spi.write(arg >> 24);
+ _spi.write(arg >> 16);
+ _spi.write(arg >> 8);
+ _spi.write(arg >> 0);
+ _spi.write(0x95);
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ int response = _spi.write(0xFF);
+ if(!(response & 0x80)) {
+ _cs = 1;
+ _spi.write(0xFF);
+ return response;
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+int SDFileSystem::_cmdx(int cmd, int arg) {
+ _cs = 0;
+
+ // send a command
+ _spi.write(0x40 | cmd);
+ _spi.write(arg >> 24);
+ _spi.write(arg >> 16);
+ _spi.write(arg >> 8);
+ _spi.write(arg >> 0);
+ _spi.write(0x95);
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ int response = _spi.write(0xFF);
+ if(!(response & 0x80)) {
+ return response;
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+
+
+int SDFileSystem::_cmd58() {
+ _cs = 0;
+ int arg = 0;
+
+ // send a command
+ _spi.write(0x40 | 58);
+ _spi.write(arg >> 24);
+ _spi.write(arg >> 16);
+ _spi.write(arg >> 8);
+ _spi.write(arg >> 0);
+ _spi.write(0x95);
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ int response = _spi.write(0xFF);
+ if(!(response & 0x80)) {
+ int ocr = _spi.write(0xFF) << 24;
+ ocr |= _spi.write(0xFF) << 16;
+ ocr |= _spi.write(0xFF) << 8;
+ ocr |= _spi.write(0xFF) << 0;
+// printf("OCR = 0x%08X\n", ocr);
+ _cs = 1;
+ _spi.write(0xFF);
+ return response;
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+
+int SDFileSystem::_cmd8() {
+ _cs = 0;
+
+ // send a command
+ _spi.write(0x40 | 8); // CMD8
+ _spi.write(0x00); // reserved
+ _spi.write(0x00); // reserved
+ _spi.write(0x01); // 3.3v
+ _spi.write(0xAA); // check pattern
+ _spi.write(0x87); // crc
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT * 1000; i++) {
+ char response[5];
+ response[0] = _spi.write(0xFF);
+ if(!(response[0] & 0x80)) {
+ for(int j=1; j<5; j++) {
+ response[i] = _spi.write(0xFF);
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return response[0];
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+
+int SDFileSystem::_read(char *buffer, int length) {
+ _cs = 0;
+
+ // read until start byte (0xFF)
+ while(_spi.write(0xFF) != 0xFE);
+
+ // read data
+ for(int i=0; i<length; i++) {
+ buffer[i] = _spi.write(0xFF);
+ }
+ _spi.write(0xFF); // checksum
+ _spi.write(0xFF);
+
+ _cs = 1;
+ _spi.write(0xFF);
+ return 0;
+}
+
+int SDFileSystem::_write(const char *buffer, int length) {
+ _cs = 0;
+
+ // indicate start of block
+ _spi.write(0xFE);
+
+ // write the data
+ for(int i=0; i<length; i++) {
+ _spi.write(buffer[i]);
+ }
+
+ // write the checksum
+ _spi.write(0xFF);
+ _spi.write(0xFF);
+
+ // check the repsonse token
+ if((_spi.write(0xFF) & 0x1F) != 0x05) {
+ _cs = 1;
+ _spi.write(0xFF);
+ return 1;
+ }
+
+ // wait for write to finish
+ while(_spi.write(0xFF) == 0);
+
+ _cs = 1;
+ _spi.write(0xFF);
+ return 0;
+}
+
+static int ext_bits(char *data, int msb, int lsb) {
+ int bits = 0;
+ int size = 1 + msb - lsb;
+ for(int i=0; i<size; i++) {
+ int position = lsb + i;
+ int byte = 15 - (position >> 3);
+ int bit = position & 0x7;
+ int value = (data[byte] >> bit) & 1;
+ bits |= value << i;
+ }
+ return bits;
+}
+
+int SDFileSystem::_sd_sectors() {
+
+ // CMD9, Response R2 (R1 byte + 16-byte block read)
+ if(_cmdx(9, 0) != 0) {
+ fprintf(stderr, "Didn't get a response from the disk\n");
+ return 0;
+ }
+
+ char csd[16];
+ if(_read(csd, 16) != 0) {
+ fprintf(stderr, "Couldn't read csd response from disk\n");
+ return 0;
+ }
+
+ // csd_structure : csd[127:126]
+ // c_size : csd[73:62]
+ // c_size_mult : csd[49:47]
+ // read_bl_len : csd[83:80] - the *maximum* read block length
+
+ int csd_structure = ext_bits(csd, 127, 126);
+ int c_size = ext_bits(csd, 73, 62);
+ int c_size_mult = ext_bits(csd, 49, 47);
+ int read_bl_len = ext_bits(csd, 83, 80);
+
+// printf("CSD_STRUCT = %d\n", csd_structure);
+
+ if(csd_structure != 0) {
+ fprintf(stderr, "This disk tastes funny! I only know about type 0 CSD structures\n");
+ return 0;
+ }
+
+ // memory capacity = BLOCKNR * BLOCK_LEN
+ // where
+ // BLOCKNR = (C_SIZE+1) * MULT
+ // MULT = 2^(C_SIZE_MULT+2) (C_SIZE_MULT < 8)
+ // BLOCK_LEN = 2^READ_BL_LEN, (READ_BL_LEN < 12)
+
+ int block_len = 1 << read_bl_len;
+ int mult = 1 << (c_size_mult + 2);
+ int blocknr = (c_size + 1) * mult;
+ int capacity = blocknr * block_len;
+
+ int blocks = capacity / 512;
+
+ return blocks;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SDFileSystem.h Sat Apr 17 13:27:34 2010 +0000
@@ -0,0 +1,66 @@
+/* mbed Microcontroller Library - SDFileSystem
+ * Copyright (c) 2008-2009, sford
+ */
+
+// VERY DRAFT CODE!!!
+
+#ifndef SDFILESYSTEM_H
+#define SDFILESYSTEM_H
+
+#include "mbed.h"
+#include "FATFileSystem.h"
+
+/* Class: SDFileSystem
+ * Access the filesystem on an SD Card using SPI
+ *
+ * Example:
+ * > SDFileSystem sd(p5, p6, p7, p12, "sd");
+ * >
+ * > int main() {
+ * > FILE *fp = fopen("/sd/myfile.txt", "w");
+ * > fprintf(fp, "Hello World!\n");
+ * > fclose(fp);
+ * > }
+ */
+class SDFileSystem : public FATFileSystem {
+public:
+
+ /* Constructor: SDFileSystem
+ * Create the File System for accessing an SD Card using SPI
+ *
+ * Variables:
+ * mosi - SPI mosi pin connected to SD Card
+ * miso - SPI miso pin conencted to SD Card
+ * sclk - SPI sclk pin connected to SD Card
+ * cs - DigitalOut pin used as SD Card chip select
+ * name - The name used to access the filesystem
+ */
+ SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
+ virtual int disk_initialize();
+ virtual int disk_write(const char *buffer, int block_number);
+ virtual int disk_read(char *buffer, int block_number);
+ virtual int disk_status();
+ virtual int disk_sync();
+ virtual int disk_sectors();
+
+protected:
+
+ int _cmd(int cmd, int arg);
+ int _cmdx(int cmd, int arg);
+ int _cmd8();
+ int _cmd58();
+ int initialise_card();
+ int initialise_card_v1();
+ int initialise_card_v2();
+
+
+ int _read(char *buffer, int length);
+ int _write(const char *buffer, int length);
+ int _sd_sectors();
+ int _sectors;
+
+ SPI _spi;
+ DigitalOut _cs;
+};
+
+#endif
--- /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
+ }
+ }
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sat Apr 17 13:27:34 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/49a220cc26e0