PROJ515 / Mbed OS ELEC-351-GROUP-E-CW

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   BMP280

SDCard.cpp@22:617bf92b481f, 2018-01-10 (annotated)

Committer:
mwthewsey
Date:
Wed Jan 10 00:32:08 2018 +0000
Revision:
22:617bf92b481f
Parent:
21:6e733076f49c 
Added set date and time from LCD.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mwthewsey 12:03589f1d5c30 1 #include "mbed.h"
mwthewsey 12:03589f1d5c30 2 #include "Sampling.h"
mwthewsey 12:03589f1d5c30 3 #include "SDCard.h"
mwthewsey 12:03589f1d5c30 4 #include "SDBlockDevice.h"
mwthewsey 12:03589f1d5c30 5 #include "FATFileSystem.h"
mwthewsey 12:03589f1d5c30 6 #include "LCD.h"
mwthewsey 12:03589f1d5c30 7
mwthewsey 21:6e733076f49c 8
mwthewsey 21:6e733076f49c 9 //Hardware
mwthewsey 12:03589f1d5c30 10 DigitalOut SDCardStatusLED(LED3);
mwthewsey 12:03589f1d5c30 11
mwthewsey 21:6e733076f49c 12 //Variables
mwthewsey 12:03589f1d5c30 13 bool SDCardPresent;
mwthewsey 12:03589f1d5c30 14 bool SDCardMounted;
mwthewsey 12:03589f1d5c30 15 unsigned short SDinternalIndex;
mwthewsey 12:03589f1d5c30 16
mwthewsey 12:03589f1d5c30 17 FILE* fp; //File pointer type
mwthewsey 21:6e733076f49c 18 SDCardStates SDCurrentState; //Create state machine state
mwthewsey 12:03589f1d5c30 19
mwthewsey 21:6e733076f49c 20 Timeout antiBounce;
mwthewsey 12:03589f1d5c30 21 Thread SDCardThread;
mwthewsey 12:03589f1d5c30 22 FATFileSystem fs;
mwthewsey 12:03589f1d5c30 23
mwthewsey 12:03589f1d5c30 24
mwthewsey 12:03589f1d5c30 25 void SDCardInit(void)
mwthewsey 12:03589f1d5c30 26 {
mwthewsey 12:03589f1d5c30 27 SDCardThread.start(&SDCardCode); //Start thread running
mwthewsey 12:03589f1d5c30 28 SD_WP.rise(&SDCardRemovedISR); //SD removed
mwthewsey 12:03589f1d5c30 29 SD_WP.fall(&SDCardInsertedISR); //SD inserted
mwthewsey 12:03589f1d5c30 30 UserButton.fall(&SDCardButtonISR); //Button released
mwthewsey 12:03589f1d5c30 31
mwthewsey 21:6e733076f49c 32 if (SD_WP == 1) { //Checks if card is inserted on power up and sets states
mwthewsey 12:03589f1d5c30 33 SDCardPresent = false;
mwthewsey 12:03589f1d5c30 34 SDCurrentState = REMOVED;
mwthewsey 12:03589f1d5c30 35 SDCardMounted = false;
mwthewsey 12:03589f1d5c30 36 } else {
mwthewsey 12:03589f1d5c30 37 SDCardPresent = true;
mwthewsey 12:03589f1d5c30 38 SDCurrentState = INSERTED;
mwthewsey 12:03589f1d5c30 39 SDCardMounted = false;
mwthewsey 12:03589f1d5c30 40 }
mwthewsey 12:03589f1d5c30 41 }
mwthewsey 12:03589f1d5c30 42
mwthewsey 12:03589f1d5c30 43
mwthewsey 12:03589f1d5c30 44 //-----------------------------------------------------------------//
mwthewsey 12:03589f1d5c30 45 //ISRs
mwthewsey 12:03589f1d5c30 46 void SDCardRemovedISR(void)
mwthewsey 12:03589f1d5c30 47 {
mwthewsey 12:03589f1d5c30 48 SDCardPresent = false;
mwthewsey 12:03589f1d5c30 49 SDCurrentState = REMOVED;
mwthewsey 21:6e733076f49c 50 antiBounce.attach(&antiBounceISR,1);
mwthewsey 12:03589f1d5c30 51 }
mwthewsey 12:03589f1d5c30 52
mwthewsey 12:03589f1d5c30 53 void SDCardInsertedISR(void)
mwthewsey 12:03589f1d5c30 54 {
mwthewsey 12:03589f1d5c30 55 SDCardPresent = true;
mwthewsey 12:03589f1d5c30 56 SDCurrentState = INSERTED;
mwthewsey 21:6e733076f49c 57 antiBounce.attach(&antiBounceISR,1);
mwthewsey 12:03589f1d5c30 58
mwthewsey 12:03589f1d5c30 59 }
mwthewsey 12:03589f1d5c30 60
mwthewsey 12:03589f1d5c30 61 void SDCardButtonISR(void)
mwthewsey 12:03589f1d5c30 62 {
mwthewsey 12:03589f1d5c30 63 SDCurrentState = DISMOUNTREQUEST;
mwthewsey 21:6e733076f49c 64 antiBounce.attach(&antiBounceISR,1);
mwthewsey 21:6e733076f49c 65 }
mwthewsey 21:6e733076f49c 66 //-----------------------------------------------------------------//
mwthewsey 21:6e733076f49c 67
mwthewsey 21:6e733076f49c 68 void antiBounceISR(void)
mwthewsey 21:6e733076f49c 69 {
mwthewsey 12:03589f1d5c30 70 SDCardThread.signal_set(1);
mwthewsey 12:03589f1d5c30 71 }
mwthewsey 12:03589f1d5c30 72
mwthewsey 12:03589f1d5c30 73
mwthewsey 12:03589f1d5c30 74 void SDCardCode(void)
mwthewsey 12:03589f1d5c30 75 {
mwthewsey 12:03589f1d5c30 76 while(true) {
mwthewsey 12:03589f1d5c30 77 Thread::signal_wait(1); //Wait untill signal set
mwthewsey 12:03589f1d5c30 78
mwthewsey 12:03589f1d5c30 79 if (SDCurrentState == REMOVED) {
mwthewsey 12:03589f1d5c30 80
mwthewsey 12:03589f1d5c30 81 if (SDCardMounted) {
mwthewsey 12:03589f1d5c30 82 //print error message file currupt
mwthewsey 12:03589f1d5c30 83 lcd.SendMessage("SD CARD REMOVED! FILE CORRUPT",true);
mwthewsey 22:617bf92b481f 84 SDCardMounted = 0;
mwthewsey 12:03589f1d5c30 85 }
mwthewsey 21:6e733076f49c 86 LogEvent(Log_SDRemoved);
mwthewsey 21:6e733076f49c 87 SDCardStatusLED = 0; //Set LEDs
mwthewsey 12:03589f1d5c30 88 GreenLED = 0;
mwthewsey 12:03589f1d5c30 89
mwthewsey 12:03589f1d5c30 90
mwthewsey 12:03589f1d5c30 91
mwthewsey 12:03589f1d5c30 92 } else if (SDCurrentState == INSERTED) {
mwthewsey 21:6e733076f49c 93 LogEvent(Log_SDInserted);
mwthewsey 21:6e733076f49c 94 SDCardStatusLED = 0; //Set LEDs
mwthewsey 21:6e733076f49c 95 GreenLED = 0;
mwthewsey 12:03589f1d5c30 96
mwthewsey 12:03589f1d5c30 97 if ( sd.init() != 0) { //Initalises the SDCard and checks if it succeeded
mwthewsey 12:03589f1d5c30 98 //SDInit failed. Reinsert the SDCard
mwthewsey 21:6e733076f49c 99 lcd.SendMessage("REINSERT SDCARD",true);
mwthewsey 21:6e733076f49c 100 LogEvent(Log_SDInitFail);
mwthewsey 12:03589f1d5c30 101
mwthewsey 21:6e733076f49c 102 } else {
mwthewsey 12:03589f1d5c30 103
mwthewsey 21:6e733076f49c 104 //Create a filing system for SD Card
mwthewsey 21:6e733076f49c 105 FATFileSystem fs("sd", &sd);
mwthewsey 12:03589f1d5c30 106
mwthewsey 21:6e733076f49c 107 //Open to WRITE
mwthewsey 21:6e733076f49c 108 fp = fopen("/sd/samples.csv","w");
mwthewsey 12:03589f1d5c30 109
mwthewsey 12:03589f1d5c30 110
mwthewsey 21:6e733076f49c 111 if (fp == NULL) {
mwthewsey 21:6e733076f49c 112 //error
mwthewsey 21:6e733076f49c 113 lcd.SendMessage("CANNOT OPEN FILE/sd/samples.csv",true);
mwthewsey 21:6e733076f49c 114 LogEvent(Log_SDFileOpenFail);
mwthewsey 21:6e733076f49c 115
mwthewsey 21:6e733076f49c 116 } else {
mwthewsey 21:6e733076f49c 117 SDCardMounted = true; //SD card is now mounted
mwthewsey 21:6e733076f49c 118
mwthewsey 21:6e733076f49c 119 Sampling(false); //Stop sampling
mwthewsey 21:6e733076f49c 120 SDinternalIndex = currentIndex; //SDinternalIndex for incrementing out data
mwthewsey 21:6e733076f49c 121 TakeKeys(true); //Take keys
mwthewsey 21:6e733076f49c 122
mwthewsey 21:6e733076f49c 123 fprintf(fp,"Date,Time,Temperature,Pressure,Light\n");
mwthewsey 21:6e733076f49c 124 for (short i = 0; i < BUFFERSIZE; i++) { //For loop of length buffersize
mwthewsey 21:6e733076f49c 125 tm T = ReturnDateTimeStruct(timeReadings[SDinternalIndex]);
mwthewsey 21:6e733076f49c 126 //SDinternalIndex was set as newest. We will now decrement to display oldest to newest
mwthewsey 21:6e733076f49c 127 fprintf(fp," %4d/%2d/%2d,%2d:%2d:%2d,%2.2f,%2.2f,%2.2f\n",T.tm_year,T.tm_mon,T.tm_mday,T.tm_hour,T.tm_min,T.tm_sec,tempReadings[SDinternalIndex],presReadings[SDinternalIndex],LDRReadings[SDinternalIndex]);
mwthewsey 21:6e733076f49c 128 SDinternalIndex = IndexDecrement(SDinternalIndex); //Decrement internal index
mwthewsey 21:6e733076f49c 129 }
mwthewsey 21:6e733076f49c 130 }
mwthewsey 21:6e733076f49c 131 TakeKeys(false); //Return keys
mwthewsey 21:6e733076f49c 132 Sampling(true); //Start sampling
mwthewsey 21:6e733076f49c 133
mwthewsey 21:6e733076f49c 134
mwthewsey 21:6e733076f49c 135 fclose(fp); //Close file
mwthewsey 21:6e733076f49c 136 SDCardStatusLED = 1;//Set light to indicate SD card file transfer complete.
mwthewsey 21:6e733076f49c 137 }
mwthewsey 12:03589f1d5c30 138
mwthewsey 12:03589f1d5c30 139 } else if (SDCurrentState == DISMOUNTREQUEST) {
mwthewsey 12:03589f1d5c30 140
mwthewsey 21:6e733076f49c 141 if (SDCardMounted) {
mwthewsey 21:6e733076f49c 142 sd.deinit(); //De initalise SD card
mwthewsey 21:6e733076f49c 143 SDCardMounted = false; //Card now not mounted
mwthewsey 21:6e733076f49c 144 lcd.SendMessage("REMOVE SD CARD",true); //SD card can be removed
mwthewsey 21:6e733076f49c 145 GreenLED = 1; //Indication LED
mwthewsey 21:6e733076f49c 146 LogEvent(Log_SDDeInit);
mwthewsey 21:6e733076f49c 147 } else {
mwthewsey 21:6e733076f49c 148 lcd.SendMessage("NO SD CARD TO REMOVE",true);
mwthewsey 21:6e733076f49c 149 LogEvent(Log_SDDismountFail);
mwthewsey 21:6e733076f49c 150 }
mwthewsey 12:03589f1d5c30 151
mwthewsey 12:03589f1d5c30 152 }
mwthewsey 12:03589f1d5c30 153 }
mwthewsey 12:03589f1d5c30 154 }
mwthewsey 12:03589f1d5c30 155
mwthewsey 12:03589f1d5c30 156
mwthewsey 12:03589f1d5c30 157