Core and SD Library not working

Troubleshooting
1

Hi,

I have tried to use my core with an SD card. Therefor I wired an SD card directly like here and I have also used my Adafruit Micro SD Breakout board plus.
I used the example sketches in the online IDE but it does not do anything. I checked the wiring multiple times and it is correct.

The web IDE highlights clock of clockPin in cyan. Could this be the problem?

Kind regards,
Tom

2

I’m not sure what your issues might be, but I have this library working with a sainsmart sd board. I don’t recall if I made any changes to the sd-card-library. I have not tried this in the web IDE, but it does work when compiling with Spark/Particle Dev via the cloud.

Below is my code:

/******************************************************************************/
    /**
        @file     application.ino
        @author   Author Name
        @brief    logs data to local sd card

    **/
/******************************************************************************/

/*----------------------------------INCLUDES----------------------------------*/
#include "sd-card-library.h"


/*-------------------ENUM, TYPE AND CONSTANT DEFINITIONS----------------------*/    
const uint8_t chipSelect    = A2;    // Also used for HARDWARE SPI setup
const uint8_t mosiPin       = A5;
const uint8_t misoPin       = A4;
const uint8_t clockPin      = A3;

/*---------------------------VARIABLE DEFINITIONS-----------------------------*/


/*---------------------------FUNCTION DECLARATION-----------------------------*/


/******************************************************************************/
    /**
        @name     setup
        @brief    setup code to only run once
        @return   void

    **/
/******************************************************************************/
void setup() {
    if(!Spark.connected()){     // if ! connected to spark cloud,
        Spark.connect();        // try to connect
    }

    Serial.begin(9600);

    while(!Serial.available()){
        SPARK_WLAN_Loop();
    }

    // Initialize SOFTWARE SPI
    if (!SD.begin(mosiPin, misoPin, clockPin, chipSelect)) {
        Serial.println("Card failed, or not present");
        return;
    }

    File testFile = SD.open("asdf.txt", FILE_WRITE);

    if(testFile){
        testFile.println("Testing... 1, 2, 3...");
        testFile.close();
        Serial.println("file write successful.");
    }else{
        Serial.println("file write error");
        return;
    }    
}


/******************************************************************************/
    /**
        @name     loop
        @brief    main program code to loop continuously
        @return   void

    **/
/******************************************************************************/
void loop() {

}

I hope this helps,

Brent

3

Hi Brent,

thank you very much for your help! I have tried your code (reimportet the sd library in the web IDE) but I had no luck.
Is the IDE also highlighting the “clock” of “clockPin” in cyan?

4

@hl68fx, can you post a picture of your wiring? The IDE does not highlight any pin so the cyan you see is the online/offline indicator I believe.

5

Hi peekay123,

here is the picture of my wiring:

and a picture of my code where “clock” is highlighted:

Kind regards,
Tom

6

I found out why your code does not work for me @bpryer
while(!Serial.available()){
SPARK_WLAN_Loop();
}

These three lines were blocking my code :smile: I don’t know why the sample from the library does not work. But now I can use your code.
Thank you all very much for your help!

7

The reason that the web IDE is highlighting your code is due to “clock” being a key word. Anytime you use a keyword as the first portion of a variable name (clockPin) the IDE’s syntax parser isn’t robust enough to catch that this is a variable name and not a key word. This should also be the same for the “time” keyword. If you have a variable named “timer” the time will be cyan.

As for your other problem… I have not tried writing directly to an sd card. I have been using a breakout board writing to a micro sd card. I would recommend trying to use your adafruit micro sd.

Brent

8

Glad to hear you got it working! I will have to try writing directly to an SD card. I have a ton of old ones setting around.

cheers,

Brent

9

The code now also works with my Adafruit Breakout board without any further modification :smile:

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