Plymouth ELEC351 Group T
/
ELEC351_Group_T
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Plymouth ELEC351 Group T
Diff: SD_CARD.cpp
- Revision:
- 51:47f5db68500b
- Parent:
- 50:3d61ca637399
- Child:
- 52:99915f5240b2
--- a/SD_CARD.cpp Tue Jan 09 12:19:12 2018 +0000
+++ b/SD_CARD.cpp Tue Jan 09 15:15:08 2018 +0000
@@ -1,93 +1,102 @@
#include "SD_CARD.hpp"
-FILE* fp;
-InterruptIn SD_CARD_DETECT(D0);
+FILE* fp; //Declaration of FILE pointer named fp
+InterruptIn SD_CARD_DETECT(D0); //Declaration of Interrupt to detect if the SD Card is present
-bool SD_Write = 1;
-void SD_Init()//Initialised the SD CARD
+bool SD_Write = 1; //Declare global variable SD_Write and initialise it to 0
+void SD_Init() //Function to initialise the SD Card
{
}
-void SD_Card_Eject()
-{/*
- SD_Write = 0;
- if(Log_Value==5){pc.printf("Closing File Ejecting SD Card\n");}
- //fclose(fp);//Close File
- sd.deinit();//Close down
- LCD.Display_Clear();
- LCD.DDRAM_Address(0x00);
- LCD.Write_String("SD Card");
- LCD.DDRAM_Address(0x40);
- LCD.Write_String("Unmounted");
- LCD.DDRAM_Address(0x00);
- pc.printf("SD Card Unmounted\n");
- */
+
+void SD_Card_Eject() //Function to eject the SD Card
+{
+ SD_Write = 0; //Set global variable SD_Write to 0
+ if(Log_Value==5){pc.printf("Closing File Ejecting SD Card\n");} //If logging is enabled, print debugging statement
+ fclose(fp); //Close the opened file
+ sd.deinit(); //Deinitialise the SD card
+ LCD.Display_Clear(); //Clear the LCD Display
+ LCD.DDRAM_Address(0x00); //Set the LCD Write Address to 0x00
+ LCD.Write_String("SD Card"); //Write "SD Card" to the first line of the LCD
+ LCD.DDRAM_Address(0x40); //Set the LCD Write Address to 0x40
+ LCD.Write_String("Unmounted"); //Write "Unmounted" to the second line of the LCD
+ LCD.DDRAM_Address(0x00); //Set the LCD Write Address to 0x00
+ pc.printf("SD Card Unmounted\n"); //Write "SD Card Unmounted" to the terminal
+
}
-void SD_Card_Write()
+void SD_Write_Control(const char* SD_Write_FileToOpen, string Write_Append_Select) //Function to write data to a file
{
- if(SD_Write == 0)
+ if (Write_Append_Select == "Append"){fp = fopen(SD_Write_FileToOpen,"a");} //If "Append" is selected, continue writing to existing file
+ else if (Write_Append_Select == "Write" ){fp = fopen(SD_Write_FileToOpen, "w");} //If "Write" is selected, create and write to new file
+
+ if(fp == NULL) //If file cannot be opened
+ {
+ error("Could not open file for write in SD_Card\n"); //Print error message to terminal
+ LCD.Display_Clear(); //Clear the LCD display
+ LCD.Write_String("CANNOT OPEN FILE"); //Write error message to LCD
+ errorCode(FATAL); //Run error function - toggles red LED
+ }
+
+ if(Log_Value==5){pc.printf("File Opened\n");} //If logging is enabled, print debug statement
+
+ for(int SD_Card_Data_Pointer = 0; SD_Card_Data_Pointer != mailsize; SD_Card_Data_Pointer++) //For all addresses in the DATA buffer
{
- if(Log_Value==5){pc.printf("SD Has Been Ejected Please do a Hardware Restart\n");}
- return;
+ if(Log_Value==5){pc.printf("Copying from address: %d\n", SD_Card_Data_Pointer);} //If logging is enabled, print debug statement
+
+ time_t Time = Data_Buffer[SD_Card_Data_Pointer].get_time(); //Store the time from the DATA buffer
+ tm* Time_Pointer = localtime(&Time); //Create pointer to stored time
+ int temp_day = Time_Pointer->tm_mday; //Assign the day to a temporary value
+ int temp_month = (Time_Pointer->tm_mon+1); //Assign the month to a temporary value
+ int temp_year = (Time_Pointer->tm_year+1900); //Assign the year to a temporary value
+ int temp_hours = Time_Pointer->tm_hour; //Assign the hour to a temporary value
+ int temp_minute = Time_Pointer->tm_min; //Assign the minute to a temporary value
+ int temp_seconds = Time_Pointer->tm_sec; //Assign the second to a temporary value
+ float temp_temperature = Data_Buffer[SD_Card_Data_Pointer].get_temperature(); //Assign the temperature to a temporary value
+ float temp_pressure = Data_Buffer[SD_Card_Data_Pointer].get_pressure(); //Assign the pressure to a temporary value
+ float temp_light = Data_Buffer[SD_Card_Data_Pointer].get_light(); //Assign the light to a temporary value
+
+ fprintf(fp, "Date: %02d/%02d/%d,",temp_day,temp_month,temp_year); //Print the date into column 1
+ fprintf(fp, "Time: %02d:%02d:%02d,",temp_hours,temp_minute, temp_seconds); //Print the time into column 2
+ fprintf(fp, "Temperature: %1.1f,",temp_temperature); //Print the temperature into column 3
+ fprintf(fp, "Pressure: %1.1f,",temp_pressure); //Print the pressure into column 4
+ fprintf(fp, "Light: %5.3f,",temp_light); //Print the light into column 5
+ }
+ fclose(fp); //Close the file
+
+}
+void SD_Card_Write() //Function to write to the SD card
+{
+ if(SD_Write == 0) //If the SD card is not present
+ {
+ if(Log_Value==5){pc.printf("SD Has Been Ejected Please do a Hardware Restart\n");} //If logging is enabled, print debug statement
+ return; //Exit function
}
- if(Write_Pointer == mailsize - 1)
+ if(Write_Pointer == mailsize - 1) //If the end of the buffer is being written to
{
- if(Log_Value==5){pc.printf("In SD_Card Thread\n");}
+ if(Log_Value==5){pc.printf("In SD_Card Thread\n");} //If logging is enabled, print debug statement
+
+ FATFileSystem fs("sd", &sd); //Sets working directory as "sd"
- FATFileSystem fs("sd", &sd);
-
+ time_t File_Time = Data_Buffer[Write_Pointer - 1].get_time(); //Store the time from the data buffer
+ tm* File_Time_Pointer = localtime(&File_Time); //Create pointer to stored time
+ int File_temp_day = File_Time_Pointer->tm_mday; //Assign the day to a temporary value
+ int File_temp_month = (File_Time_Pointer->tm_mon+1); //Assign the month to a temporary value
+ int File_temp_year = (File_Time_Pointer->tm_year+1900); //Assign the year to a temporary value
- time_t File_Time = Data_Buffer[Write_Pointer - 1].get_time();
- tm* File_Time_Pointer = localtime(&File_Time);
- int File_temp_day = File_Time_Pointer->tm_mday;
- int File_temp_month = (File_Time_Pointer->tm_mon+1);//Set to current month
- int File_temp_year = (File_Time_Pointer->tm_year+1900);//Set to current year
-
+ //Create a const char* using year, month and day and create a file using that name
char FileToOpen[50] = {};
snprintf (FileToOpen, sizeof(char) * sizeof(FileToOpen), "/sd/%d_%02d_%02d.csv",File_temp_year,File_temp_month,File_temp_day);
- fp = fopen(FileToOpen,"wb");
- if (fp == NULL)
- {
- error("Could not open file for write in SD_Card\n");
- LCD.Display_Clear();
- LCD.Write_String("CANNOT OPEN FILE");
- errorCode(FATAL);
- } //Open to WRITE
-
- if(Log_Value==5){pc.printf("File Opened\n");}
-
- for(int SD_Card_Data_Pointer = 0; SD_Card_Data_Pointer != mailsize; SD_Card_Data_Pointer++)
+ if(fp = fopen(FileToOpen,"r")) //If the file already exists
{
- if(Log_Value==5){pc.printf("Copying from address: %d\n", SD_Card_Data_Pointer);}
-
- //ofstream outfile ("Hello Tom.txt");
- time_t Time = Data_Buffer[SD_Card_Data_Pointer].get_time();
- tm* Time_Pointer = localtime(&Time);
- int temp_day = Time_Pointer->tm_mday;
- int temp_month = (Time_Pointer->tm_mon+1);//Set to current month
- int temp_year = (Time_Pointer->tm_year+1900);//Set to current year
-
- int temp_hours = Time_Pointer->tm_hour;
- int temp_minute = Time_Pointer->tm_min;
- int temp_seconds = Time_Pointer->tm_sec;
-
- float temp_temperature = Data_Buffer[SD_Card_Data_Pointer].get_temperature();
- float temp_pressure = Data_Buffer[SD_Card_Data_Pointer].get_pressure();
- float temp_light = Data_Buffer[SD_Card_Data_Pointer].get_light();
-
-
- fprintf(fp, "Date: %02d/%02d/%d,",temp_day,temp_month,temp_year);//Date
- fprintf(fp, "Time: %02d:%02d:%02d,",temp_hours,temp_minute, temp_seconds);//Time
- fprintf(fp, "Temperature: %1.1f,",temp_temperature);//Temperature
- fprintf(fp, "Pressure: %1.1f,",temp_pressure);//Pressure
- fprintf(fp, "Light: %5.3f,",temp_light);//Light
- fprintf(fp, "End of Data \n");//End of data
+ fclose(fp); //Close the file
+ SD_Write_Control(FileToOpen, "Append"); //Append the existing file
}
-
- //Close File
- fclose(fp);
- if(Log_Value==5){pc.printf("Dumped data to SD Card\n");}
+ else //If the file doesn't exist
+ {
+ SD_Write_Control(FileToOpen, "Write"); //Create a new file
+ }
+ if(Log_Value==5){pc.printf("Dumped data to SD Card\n");} //If logging is enabled, print debug statement
}
}