Mathew Swabey / SDCard

SD card functionality

Dependents:   ELEC350_Project2 SDcard

SDCard.cpp@12:3198f0b7b36f, 2018-12-22 (annotated)

Committer:
Swabey89
Date:
Sat Dec 22 21:14:56 2018 +0000
Revision:
12:3198f0b7b36f
Parent:
11:89960c1f2234
Child:
13:5f786448e883
Changes to the way data is saved

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Swabey89 0:0fc2cf27ff9e 1 #include "SDCard.hpp"
Swabey89 7:393fa8184388 2 #include <string>
Swabey89 3:c6e5dd2faa22 3
Swabey89 1:c3af0c26ded2 4 void SDcard(void)
Swabey89 0:0fc2cf27ff9e 5 {
Swabey89 9:113f4934b907 6 static time_t seconds; //static reqiured?
Swabey89 0:0fc2cf27ff9e 7
Swabey89 2:9a5eea2adbf8 8 //Initialise the SD card
Swabey89 8:ee8f65745141 9 if (sd.init() != 0) {
Swabey89 10:f2b8e3b587d5 10 printlock.lock();
Swabey89 8:ee8f65745141 11 pc->printf("WARNING:SD CARD INITIALISATION FAILED\n\r");
Swabey89 10:f2b8e3b587d5 12 printlock.unlock();
Swabey89 8:ee8f65745141 13 sd_init = false;
Swabey89 8:ee8f65745141 14 //lcd.cls();
Swabey89 8:ee8f65745141 15 //lcd.printf("CANNOT INIT SD");
Swabey89 8:ee8f65745141 16 //errorCode(FATAL);
Swabey89 2:9a5eea2adbf8 17 }
Swabey89 8:ee8f65745141 18 else
Swabey89 8:ee8f65745141 19 {
Swabey89 8:ee8f65745141 20 //Create a filing system for SD Card
Swabey89 8:ee8f65745141 21 fs = new FATFileSystem("sd", &sd);
Swabey89 10:f2b8e3b587d5 22 printlock.lock();
Swabey89 8:ee8f65745141 23 pc->printf("SD CARD INITIALISED\n\r");
Swabey89 10:f2b8e3b587d5 24 printlock.unlock();
Swabey89 7:393fa8184388 25
Swabey89 8:ee8f65745141 26 //Open to WRITE
Swabey89 8:ee8f65745141 27 char fileDate[30];
Swabey89 10:f2b8e3b587d5 28 timeLock.lock();
Swabey89 8:ee8f65745141 29 seconds = time(NULL);
Swabey89 8:ee8f65745141 30 timeData = localtime(&seconds);
Swabey89 8:ee8f65745141 31 set_time(mktime(timeData));
Swabey89 8:ee8f65745141 32 strftime(fileDate, 30, "sd/log_%d_%m_%y.csv", timeData);
Swabey89 10:f2b8e3b587d5 33 timeLock.unlock();
Swabey89 8:ee8f65745141 34 fp = fopen(fileDate,"a");
Swabey89 8:ee8f65745141 35
Swabey89 8:ee8f65745141 36 if (fp == NULL)
Swabey89 8:ee8f65745141 37 {
Swabey89 10:f2b8e3b587d5 38 printlock.lock();
Swabey89 8:ee8f65745141 39 pc->printf("WARNING: COULD NOT OPEN FILE FOR WRITE\n\r");
Swabey89 10:f2b8e3b587d5 40 printlock.unlock();
Swabey89 8:ee8f65745141 41 //lcd.cls();
Swabey89 8:ee8f65745141 42 //lcd.printf("CANNOT OPEN FILE\n\n");
Swabey89 8:ee8f65745141 43 //errorCode(FATAL);
Swabey89 8:ee8f65745141 44 }
Swabey89 8:ee8f65745141 45 else
Swabey89 8:ee8f65745141 46 {
Swabey89 10:f2b8e3b587d5 47 printlock.lock();
Swabey89 10:f2b8e3b587d5 48 pc->printf("FILE OPEN FOR WRITING\n\n\n\r");
Swabey89 10:f2b8e3b587d5 49 printlock.unlock();
Swabey89 8:ee8f65745141 50 sd_init = true;
Swabey89 8:ee8f65745141 51 }
Swabey89 8:ee8f65745141 52 fclose(fp);
Swabey89 8:ee8f65745141 53 }
Swabey89 1:c3af0c26ded2 54 }
Swabey89 1:c3af0c26ded2 55
Swabey89 1:c3af0c26ded2 56 void SDread(int n)
Swabey89 1:c3af0c26ded2 57 {
Swabey89 12:3198f0b7b36f 58 //Read n samples from the SD card
Swabey89 12:3198f0b7b36f 59 unsigned int i=0;
Swabey89 12:3198f0b7b36f 60 unsigned int j = newestIndex;
Swabey89 12:3198f0b7b36f 61 if (n==-1) {n = (BUFFERSIZE-Nspaces);}
Swabey89 12:3198f0b7b36f 62
Swabey89 10:f2b8e3b587d5 63 printlock.lock();
Swabey89 12:3198f0b7b36f 64 bufferLock.lock();
Swabey89 12:3198f0b7b36f 65 while (i < n) //ONLY USE SPACE AVAILABLE - KEEP IN MIND LAST READ WAS BEFORE IT WAS DECREMENTED
Swabey89 12:3198f0b7b36f 66 {
Swabey89 12:3198f0b7b36f 67 pc->printf("Date/Time: %s\tTemperature: %5.2f\tPressure: %5.2f\tLight: %5.2f\n\r", buffer[j].getTime(), buffer[j].gettemp(), buffer[j].getpress(), buffer[j].getlight());
Swabey89 12:3198f0b7b36f 68 j = (j?j:BUFFERSIZE)-1;
Swabey89 12:3198f0b7b36f 69 i++;
Swabey89 12:3198f0b7b36f 70 }
Swabey89 12:3198f0b7b36f 71 bufferLock.unlock();
Swabey89 12:3198f0b7b36f 72 printf("%d records read\r\n\n", i);
Swabey89 12:3198f0b7b36f 73 printlock.unlock();
Swabey89 2:9a5eea2adbf8 74 }
Swabey89 2:9a5eea2adbf8 75
Swabey89 12:3198f0b7b36f 76 void SDdelete(int n) //MUST RELEASE SPACE AVAILABLE
Swabey89 2:9a5eea2adbf8 77 {
Swabey89 3:c6e5dd2faa22 78 //Delete n samples from the SD card
Swabey89 12:3198f0b7b36f 79 unsigned int i = 0;
Swabey89 12:3198f0b7b36f 80 if (n==-1) {n = (BUFFERSIZE-Nspaces);}
Swabey89 12:3198f0b7b36f 81 bufferLock.lock();
Swabey89 12:3198f0b7b36f 82 while (i < n)
Swabey89 11:89960c1f2234 83 {
Swabey89 12:3198f0b7b36f 84 spaceAvailable.release();
Swabey89 12:3198f0b7b36f 85 i++;
Swabey89 11:89960c1f2234 86 }
Swabey89 12:3198f0b7b36f 87 bufferLock.unlock();
Swabey89 12:3198f0b7b36f 88 Nspaces += i;
Swabey89 12:3198f0b7b36f 89 printlock.lock();
Swabey89 12:3198f0b7b36f 90 pc->printf("Deleted %d records\r\n\n\n", i);
Swabey89 12:3198f0b7b36f 91 printlock.unlock();
Swabey89 1:c3af0c26ded2 92 }
Swabey89 1:c3af0c26ded2 93
Swabey89 10:f2b8e3b587d5 94
Swabey89 10:f2b8e3b587d5 95
Swabey89 10:f2b8e3b587d5 96 //UNUSED
Swabey89 3:c6e5dd2faa22 97 void SDaddSample(double temp, double pressure)
Swabey89 3:c6e5dd2faa22 98 {
Swabey89 4:dc767b5f917b 99 //Add the sampled data to the SD card
Swabey89 6:5646450f583b 100 yellowLED = !yellowLED; //debugging
Swabey89 4:dc767b5f917b 101 fp = fopen("/sd/q.csv","a");
Swabey89 3:c6e5dd2faa22 102 fprintf(fp, "%6.1f,%.2f\n\r", temp, pressure);
Swabey89 3:c6e5dd2faa22 103 fclose(fp);
Swabey89 3:c6e5dd2faa22 104 }
Swabey89 3:c6e5dd2faa22 105
Swabey89 1:c3af0c26ded2 106 void SDalive(void)
Swabey89 1:c3af0c26ded2 107 {
Swabey89 3:c6e5dd2faa22 108 //Signal that the SD thread is still alive
Swabey89 2:9a5eea2adbf8 109 //puts("SD THREAD ALIVE\n");
Swabey89 7:393fa8184388 110 }
Swabey89 7:393fa8184388 111
Swabey89 9:113f4934b907 112 void SDmount(void)
Swabey89 9:113f4934b907 113 {
Swabey89 9:113f4934b907 114 while(true)
Swabey89 9:113f4934b907 115 {
Swabey89 9:113f4934b907 116 Thread::signal_wait(SIGNAL_SD);
Swabey89 10:f2b8e3b587d5 117
Swabey89 9:113f4934b907 118 if (sd_init)
Swabey89 9:113f4934b907 119 {
Swabey89 9:113f4934b907 120 fclose(fp);
Swabey89 9:113f4934b907 121 sd.deinit();
Swabey89 10:f2b8e3b587d5 122 printlock.lock();
Swabey89 9:113f4934b907 123 pc->printf("SD CARD UNMOUNTED\n\r");
Swabey89 10:f2b8e3b587d5 124 printlock.unlock();
Swabey89 10:f2b8e3b587d5 125
Swabey89 10:f2b8e3b587d5 126 LCDlock.lock();
Swabey89 9:113f4934b907 127 lcd.cls();
Swabey89 10:f2b8e3b587d5 128 lcd.printf("Unmounted..");
Swabey89 10:f2b8e3b587d5 129 Thread::wait(5000);
Swabey89 10:f2b8e3b587d5 130 LCDlock.unlock();
Swabey89 10:f2b8e3b587d5 131
Swabey89 9:113f4934b907 132 sd_init = false;
Swabey89 9:113f4934b907 133
Swabey89 9:113f4934b907 134 }
Swabey89 9:113f4934b907 135 else
Swabey89 9:113f4934b907 136 {
Swabey89 9:113f4934b907 137 SDcard();
Swabey89 10:f2b8e3b587d5 138 LCDlock.lock();
Swabey89 10:f2b8e3b587d5 139 lcd.cls();
Swabey89 10:f2b8e3b587d5 140 if (sd_init)
Swabey89 10:f2b8e3b587d5 141 {
Swabey89 10:f2b8e3b587d5 142 lcd.printf("SD mounted..");
Swabey89 10:f2b8e3b587d5 143 }
Swabey89 10:f2b8e3b587d5 144 else
Swabey89 10:f2b8e3b587d5 145 {
Swabey89 10:f2b8e3b587d5 146 lcd.printf("SD FAILED..");
Swabey89 10:f2b8e3b587d5 147 }
Swabey89 10:f2b8e3b587d5 148 Thread::wait(5000);
Swabey89 10:f2b8e3b587d5 149 LCDlock.unlock();
Swabey89 9:113f4934b907 150 }
Swabey89 9:113f4934b907 151
Swabey89 9:113f4934b907 152 }
Swabey89 9:113f4934b907 153 }
Swabey89 9:113f4934b907 154