hi i want to send integer from sd card to arduino....

Projects Programming
1

hi i want to send integer( 4x4 array) from sd card to arduino....

so i use CSV File. i saw any other similar topics and i followed that but it wasn't working,,

for instance,

124,54,250,111
231,21,12,188
144,56,160,116
211,21,15,118 like this..

first of all, i made CSV File at the sd card.

and uploaded code like this, but it wasn't working. i don't know what the problem is...

i appreciate if you help my problem..

#include <SD.h>
#include<SPI.h>

File myFile;
char disp[4][4];
Sd2Card card;
SdVolume volume;
SdFile root;

const int chipSelect = 4;    

void setup() {
       
        Serial.begin(9600);  
        Serial.print("\nInitializing SD card...");
        
     
        pinMode(10, OUTPUT);     

        if (!card.init(SPI_HALF_SPEED, chipSelect)) {
                Serial.println("initialization failed. Things to check:");
                Serial.println("* is a card is inserted?");
                Serial.println("* Is your wiring correct?");
                Serial.println("* did you change the chipSelect pin to match your shield or module?");
                return;
                
      
        } else {  
                Serial.println("Wiring is correct and a card is present."); 
        }

        
        Serial.print("\nCard type: ");
        switch (card.type()) {
        case SD_CARD_TYPE_SD1:
                Serial.println("SD1");
                break;
        case SD_CARD_TYPE_SD2:
                Serial.println("SD2");
                break;
        case SD_CARD_TYPE_SDHC:
                Serial.println("SDHC");
                break;
        default:
                Serial.println("Unknown");
        }
        
        if (!volume.init(card)) {
                Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
                return;
        }

        
        uint32_t volumesize;
        Serial.print("\nVolume type is FAT");
        Serial.println(volume.fatType(), DEC);
        Serial.println();
        
        volumesize = volume.blocksPerCluster();   
        volumesize *= volume.clusterCount();    
        volumesize *= 512;                           
        Serial.print("Volume size (bytes): ");
        Serial.println(volumesize);
        Serial.print("Volume size (Kbytes): ");
        volumesize /= 1024;
        Serial.println(volumesize);
        Serial.print("Volume size (Mbytes): ");
        volumesize /= 1024;
        Serial.println(volumesize);
        
        Serial.println("\nFiles found on the card (name, date and size in bytes): ");
        root.openRoot(volume);
        
        root.ls(LS_R | LS_DATE | LS_SIZE);      
}
void loop(void) {
      myFile = SD.open("DATA.CSV",FILE_READ);  
        
      while(myFile.available()){       
      for(int a=0; a<4;a++){
         for(int b=0; b<4;b++){
         disp[a][b] = myFile.read();
         Serial.print(disp[a][b]);        
         delay(100);
         }
        }
      }
myFile.close();
}
2

"isn't working" is the worst possible description you can use.
How is is not working? What do you expect and what do you actually get/see?
Does your code see the SD card and successfully open the file or something else?
More information please.

3

so i use CSV File

csv files do NOT contain integers. They contain characters.

i don't know what the problem is

It is almost certainly that there is something wrong with the programmer.

4

i'm really sorry and thank you for your applying!

void loop(void) {
      myFile = SD.open("DATA.CSV",FILE_READ);  
        
      while(myFile.available()){       
      for(int a=0; a<4;a++){
         for(int b=0; b<4;b++){
         disp[a][b] = myFile.read();
         Serial.print(disp[a][b]);        
         delay(100);
         }
       }
      }
myFile.close();
}

in this code, i want to see data from sd card on serial monitor. but i couldn't see anything.
i think this is because they can't open myFile or they can't recognize data.