Plymouth ELEC351 Group T / Mbed OS ELEC351_Group_T

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SD_CARD.cpp@51:47f5db68500b, 2018-01-09 (annotated)

Committer:
thomasmorris
Date:
Tue Jan 09 15:15:08 2018 +0000
Revision:
51:47f5db68500b
Parent:
50:3d61ca637399
Child:
52:99915f5240b2
Commenting Left; Sort out LCD number problem.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
thomasmorris 47:6d128e500875 1 #include "SD_CARD.hpp"
thomasmorris 51:47f5db68500b 2 FILE* fp; //Declaration of FILE pointer named fp
thomasmorris 51:47f5db68500b 3 InterruptIn SD_CARD_DETECT(D0); //Declaration of Interrupt to detect if the SD Card is present
thomasmorris 49:d51f96a46cc3 4
thomasmorris 49:d51f96a46cc3 5
thomasmorris 51:47f5db68500b 6 bool SD_Write = 1; //Declare global variable SD_Write and initialise it to 0
thomasmorris 51:47f5db68500b 7 void SD_Init() //Function to initialise the SD Card
thomasmorris 47:6d128e500875 8 {
thomasmorris 47:6d128e500875 9
thomasmorris 47:6d128e500875 10 }
thomasmorris 51:47f5db68500b 11
thomasmorris 51:47f5db68500b 12 void SD_Card_Eject() //Function to eject the SD Card
thomasmorris 51:47f5db68500b 13 {
thomasmorris 51:47f5db68500b 14 SD_Write = 0; //Set global variable SD_Write to 0
thomasmorris 51:47f5db68500b 15 if(Log_Value==5){pc.printf("Closing File Ejecting SD Card\n");} //If logging is enabled, print debugging statement
thomasmorris 51:47f5db68500b 16 fclose(fp); //Close the opened file
thomasmorris 51:47f5db68500b 17 sd.deinit(); //Deinitialise the SD card
thomasmorris 51:47f5db68500b 18 LCD.Display_Clear(); //Clear the LCD Display
thomasmorris 51:47f5db68500b 19 LCD.DDRAM_Address(0x00); //Set the LCD Write Address to 0x00
thomasmorris 51:47f5db68500b 20 LCD.Write_String("SD Card"); //Write "SD Card" to the first line of the LCD
thomasmorris 51:47f5db68500b 21 LCD.DDRAM_Address(0x40); //Set the LCD Write Address to 0x40
thomasmorris 51:47f5db68500b 22 LCD.Write_String("Unmounted"); //Write "Unmounted" to the second line of the LCD
thomasmorris 51:47f5db68500b 23 LCD.DDRAM_Address(0x00); //Set the LCD Write Address to 0x00
thomasmorris 51:47f5db68500b 24 pc.printf("SD Card Unmounted\n"); //Write "SD Card Unmounted" to the terminal
thomasmorris 51:47f5db68500b 25
thomasmorris 48:244d6d81bb52 26 }
thomasmorris 51:47f5db68500b 27 void SD_Write_Control(const char* SD_Write_FileToOpen, string Write_Append_Select) //Function to write data to a file
thomasmorris 47:6d128e500875 28 {
thomasmorris 51:47f5db68500b 29 if (Write_Append_Select == "Append"){fp = fopen(SD_Write_FileToOpen,"a");} //If "Append" is selected, continue writing to existing file
thomasmorris 51:47f5db68500b 30 else if (Write_Append_Select == "Write" ){fp = fopen(SD_Write_FileToOpen, "w");} //If "Write" is selected, create and write to new file
thomasmorris 51:47f5db68500b 31
thomasmorris 51:47f5db68500b 32 if(fp == NULL) //If file cannot be opened
thomasmorris 51:47f5db68500b 33 {
thomasmorris 51:47f5db68500b 34 error("Could not open file for write in SD_Card\n"); //Print error message to terminal
thomasmorris 51:47f5db68500b 35 LCD.Display_Clear(); //Clear the LCD display
thomasmorris 51:47f5db68500b 36 LCD.Write_String("CANNOT OPEN FILE"); //Write error message to LCD
thomasmorris 51:47f5db68500b 37 errorCode(FATAL); //Run error function - toggles red LED
thomasmorris 51:47f5db68500b 38 }
thomasmorris 51:47f5db68500b 39
thomasmorris 51:47f5db68500b 40 if(Log_Value==5){pc.printf("File Opened\n");} //If logging is enabled, print debug statement
thomasmorris 51:47f5db68500b 41
thomasmorris 51:47f5db68500b 42 for(int SD_Card_Data_Pointer = 0; SD_Card_Data_Pointer != mailsize; SD_Card_Data_Pointer++) //For all addresses in the DATA buffer
thomasmorris 48:244d6d81bb52 43 {
thomasmorris 51:47f5db68500b 44 if(Log_Value==5){pc.printf("Copying from address: %d\n", SD_Card_Data_Pointer);} //If logging is enabled, print debug statement
thomasmorris 51:47f5db68500b 45
thomasmorris 51:47f5db68500b 46 time_t Time = Data_Buffer[SD_Card_Data_Pointer].get_time(); //Store the time from the DATA buffer
thomasmorris 51:47f5db68500b 47 tm* Time_Pointer = localtime(&Time); //Create pointer to stored time
thomasmorris 51:47f5db68500b 48 int temp_day = Time_Pointer->tm_mday; //Assign the day to a temporary value
thomasmorris 51:47f5db68500b 49 int temp_month = (Time_Pointer->tm_mon+1); //Assign the month to a temporary value
thomasmorris 51:47f5db68500b 50 int temp_year = (Time_Pointer->tm_year+1900); //Assign the year to a temporary value
thomasmorris 51:47f5db68500b 51 int temp_hours = Time_Pointer->tm_hour; //Assign the hour to a temporary value
thomasmorris 51:47f5db68500b 52 int temp_minute = Time_Pointer->tm_min; //Assign the minute to a temporary value
thomasmorris 51:47f5db68500b 53 int temp_seconds = Time_Pointer->tm_sec; //Assign the second to a temporary value
thomasmorris 51:47f5db68500b 54 float temp_temperature = Data_Buffer[SD_Card_Data_Pointer].get_temperature(); //Assign the temperature to a temporary value
thomasmorris 51:47f5db68500b 55 float temp_pressure = Data_Buffer[SD_Card_Data_Pointer].get_pressure(); //Assign the pressure to a temporary value
thomasmorris 51:47f5db68500b 56 float temp_light = Data_Buffer[SD_Card_Data_Pointer].get_light(); //Assign the light to a temporary value
thomasmorris 51:47f5db68500b 57
thomasmorris 51:47f5db68500b 58 fprintf(fp, "Date: %02d/%02d/%d,",temp_day,temp_month,temp_year); //Print the date into column 1
thomasmorris 51:47f5db68500b 59 fprintf(fp, "Time: %02d:%02d:%02d,",temp_hours,temp_minute, temp_seconds); //Print the time into column 2
thomasmorris 51:47f5db68500b 60 fprintf(fp, "Temperature: %1.1f,",temp_temperature); //Print the temperature into column 3
thomasmorris 51:47f5db68500b 61 fprintf(fp, "Pressure: %1.1f,",temp_pressure); //Print the pressure into column 4
thomasmorris 51:47f5db68500b 62 fprintf(fp, "Light: %5.3f,",temp_light); //Print the light into column 5
thomasmorris 51:47f5db68500b 63 }
thomasmorris 51:47f5db68500b 64 fclose(fp); //Close the file
thomasmorris 51:47f5db68500b 65
thomasmorris 51:47f5db68500b 66 }
thomasmorris 51:47f5db68500b 67 void SD_Card_Write() //Function to write to the SD card
thomasmorris 51:47f5db68500b 68 {
thomasmorris 51:47f5db68500b 69 if(SD_Write == 0) //If the SD card is not present
thomasmorris 51:47f5db68500b 70 {
thomasmorris 51:47f5db68500b 71 if(Log_Value==5){pc.printf("SD Has Been Ejected Please do a Hardware Restart\n");} //If logging is enabled, print debug statement
thomasmorris 51:47f5db68500b 72 return; //Exit function
thomasmorris 48:244d6d81bb52 73 }
thomasmorris 51:47f5db68500b 74 if(Write_Pointer == mailsize - 1) //If the end of the buffer is being written to
thomasmorris 47:6d128e500875 75 {
thomasmorris 51:47f5db68500b 76 if(Log_Value==5){pc.printf("In SD_Card Thread\n");} //If logging is enabled, print debug statement
thomasmorris 51:47f5db68500b 77
thomasmorris 51:47f5db68500b 78 FATFileSystem fs("sd", &sd); //Sets working directory as "sd"
thomasmorris 50:3d61ca637399 79
thomasmorris 51:47f5db68500b 80 time_t File_Time = Data_Buffer[Write_Pointer - 1].get_time(); //Store the time from the data buffer
thomasmorris 51:47f5db68500b 81 tm* File_Time_Pointer = localtime(&File_Time); //Create pointer to stored time
thomasmorris 51:47f5db68500b 82 int File_temp_day = File_Time_Pointer->tm_mday; //Assign the day to a temporary value
thomasmorris 51:47f5db68500b 83 int File_temp_month = (File_Time_Pointer->tm_mon+1); //Assign the month to a temporary value
thomasmorris 51:47f5db68500b 84 int File_temp_year = (File_Time_Pointer->tm_year+1900); //Assign the year to a temporary value
thomasmorris 47:6d128e500875 85
thomasmorris 51:47f5db68500b 86 //Create a const char* using year, month and day and create a file using that name
thomasmorris 50:3d61ca637399 87 char FileToOpen[50] = {};
thomasmorris 50:3d61ca637399 88 snprintf (FileToOpen, sizeof(char) * sizeof(FileToOpen), "/sd/%d_%02d_%02d.csv",File_temp_year,File_temp_month,File_temp_day);
thomasmorris 50:3d61ca637399 89
thomasmorris 51:47f5db68500b 90 if(fp = fopen(FileToOpen,"r")) //If the file already exists
thomasmorris 47:6d128e500875 91 {
thomasmorris 51:47f5db68500b 92 fclose(fp); //Close the file
thomasmorris 51:47f5db68500b 93 SD_Write_Control(FileToOpen, "Append"); //Append the existing file
thomasmorris 47:6d128e500875 94 }
thomasmorris 51:47f5db68500b 95 else //If the file doesn't exist
thomasmorris 51:47f5db68500b 96 {
thomasmorris 51:47f5db68500b 97 SD_Write_Control(FileToOpen, "Write"); //Create a new file
thomasmorris 51:47f5db68500b 98 }
thomasmorris 51:47f5db68500b 99 if(Log_Value==5){pc.printf("Dumped data to SD Card\n");} //If logging is enabled, print debug statement
thomasmorris 50:3d61ca637399 100
thomasmorris 47:6d128e500875 101 }
thomasmorris 47:6d128e500875 102 }
thomasmorris 49:d51f96a46cc3 103