SD library

[achernatsky]

Hi all,

I have problems mounting sd card:

[E][sd_diskio.cpp:708] sdcard_mount(): f_mount failed 0x(1)
Card Mount Failed

Connection:
MOSI 23
MISO 19
SCK 18
SS 5

Micro SD Card Module With this library it works.

[me-no-dev]

How are you starting the card? SD.begin(5); is how you define the SS pin

[achernatsky]

I'm using SD.begin(), but I've recently tried:

SD.begin(5)
SD.begin(4)
SD.begin(26)
SD.begin(27)

so with 4,26,27 pins it also doesn't work

Error is the same. I'm using this board.

[me-no-dev]

This is rather strange... I use the same pins and the same lib daily. Could you try to start the SD the following way?

SD.begin(5, SPI, 1000000);

[me-no-dev]

Also if you can change the default debug level of Arduino (option in board menu if you select dev module)

[achernatsky]

With SD.begin(5, SPI, 1000000); error is the same. I'm using PlatformIO IDE how can i change debug level here?

[me-no-dev]

PIO..... are you running the stage version of ESP32? http://docs.platformio.org/page/platforms/espressif32.html#using-arduino-framework-with-staging-version

[achernatsky]

Yes, ESP32 version is stage.

[me-no-dev]

There should be a way for you to have the following flag while building PIO project -DCORE_DEBUG_LEVEL=5

[me-no-dev]

Also you can try updating or reinstalling the framework for PIO, it has proven not to update sometimes

[achernatsky]

Generally build flags are adding in platformio.ini like this: build_flags =-DCORE_DEBUG_LEVEL=5, but I can't see difference in output. I have reinstalled PIO last thursday. I'll test my board with Arduino IDE later to figure out if it works correctly with it.

[achernatsky]

I've tested in Arduino IDE with Core debug level "debug" for combinations:

SD.begin(); // Connected to pin 5
SD.begin(5); // Connected to pin 5
SD.begin(5, SPI, 1000000);  // Connected to pin 5
SD.begin(26); // Connected to pin 26
SD.begin(26, SPI, 1000000);  // Connected to pin 26

For all variants i recieving this error: [E][sd_diskio.cpp:724] sdcard_mount(): f_mount failed 0x(1)

[igrr]

It seems like the card is either not formatted, or FATFS library can not recognize the format (which will happen if you try to use an exFAT formatted card).

[achernatsky]

@igrr it is formatted as FAT and I've just tested with FAT32, it also doesn't work, but both file systems work with adafruit/arduino-esp32.

[me-no-dev]

How they are working with adafruit's lib I am really not sure. Your code seems to be failing at the very first read of the card. I was expecting more debug if you lower the level TBH

[me-no-dev]

BTW that Adafruit repository is really old. Lots have changed in SPI since then. Do you call SPI before or after SD init?

[achernatsky]

I've tried to call SPI.begin(); before SD.begin(5); but result was the same. And I've copied only SD library from Adafruit, everything else was from this repository.

[me-no-dev]

Then that give even less clues :( I went through the code and given that you say you tried different debug levels and this is the only line that you get, I can't find a reason. To not get other debug means that card init went fine (detects card type), but mount failed from then on.

[copercini]

Do you have anything else connected to the ESP? Have you tried with another SD card?

[achernatsky]

@copercini only micro SD card module was connected. I've tested with other cards and it works with 16Gb and 512Mb cards, so it seems that problem was in that card.

[achernatsky]

Is there any limitations for file names? I couldn't read file /config.json but when I renamed it to /config.txt it was read successfully.

[me-no-dev]

could you list your SD card and see what it gives?

void listDir(const char * dirname){
    Serial.printf("Listing directory: %s\n", dirname);

    File root = SD.open(dirname);
    if(!root){
        Serial.println("Failed to open directory");
        return;
    }
    if(!root.isDirectory()){
        Serial.println("Not a directory");
        return;
    }

    File file = root.openNextFile();
    while(file){
        if(file.isDirectory()){
            Serial.print("  DIR : ");
            Serial.println(file.name());
        } else {
            Serial.print("  FILE: ");
            Serial.print(file.name());
            Serial.print("  SIZE: ");
            Serial.println(file.size());
        }
        file = root.openNextFile();
    }
}

[achernatsky]

It gives in PIO:

Listing directory: /
  DIR : /SYSTEM~1
  FILE: /CONFIG~1.JSO  SIZE: 450
  FILE: /CONFIG.TXT  SIZE: 450

In Arduino IDE it gives:

Listing directory: /
  DIR : /System Volume Information
  FILE: /config.json  SIZE: 450
  FILE: /config.txt  SIZE: 450

And reading is working fine here. It seems that errors are only with PIO, thanks.

[me-no-dev]

old PIO version of esp32-arduino

[copercini]

A long time ago I was the same dilemma, adafruid versus me-no-dev Sd library.... So it's my empirical experience it both:

Adafruid's mount and start even if the card or the hardware has a problem, but it will crash in runtime at any time

Me-no-dev lib don't start if everything is OK with the hardware and I never see it crashes in runtime.

[cmd-ship]

I am also having this problem with my ESP32 Thing that is on a breadboard. The fix for me was to solder my sd breakout board to my ESP32 Thing on a PCB prototyping board. My pinouts are the default pinouts for SPI the code is the same, the boards are practically from the same batches.

CS:5, SCK:18, MOSI:19, MISO:23

Maybe there is some signal degradation when using a breadboard? Haven't experienced a mounting error since I switched over.

[me-no-dev]

could be caused by less than perfect connection or too long wires that experience cross-talk at high SPI frequencies.

[b-nathan]

I had also troubles with esp32 and the sd library. I connected a ssd1351 color oled display and a microSD card connector (as described in the sd card library description). I tried to run the code from the adafruit SSD1351 display library example but I got the error:

[E][sd_diskio.cpp:708] sdcard_mount(): f_mount failed 0x(1) Card Mount Failed

I looked really hard for the reason, but can't find anything. Then I tried once a microSD card (without HC) instead of several microSDHC cards and it worked like a charm. I need to check other microSD cards with FAT16 filesystem. But I assume that there is an issue in the library, that it accepts FAT32 not correctly.

[cr13]

hello, I don't know what to try anymore, I get the "Card Mount Failed" ruling. "I'm using the pins (CS: 5, SCK: 18, MOSI: 19, MISO: 23), Arduino IDE compiler and I'm testing the SD_test library and I don't know what else to try. I have tried two 512MB and 8GB microSDs in FAT16 and FAT32 formats and always the same result. What could I prove or what am I doing wrong?

[stickbreaker]

@cr13 Try adding pullups to MISO and MOSI, I use 3.3k to the 3.3v Vdd pin.

Chuck.

[cr13]

@stickbreaker I don`t undertand that you want say with "Try adding pullups to MISO and MOSI", I use 3,3v in pin VCC, I try with resistor 3.3k

[stickbreaker]

@cr13 I have a "WeMos BlueTooth & Battery" ESP32 board, to make it function with the esp32 Sd I had to add 2 pullup resistors, one for MISO, one for MOSI. The pullup resistors connect from 3.3v to MISO, and 3.3V to MOSI. My board has two power pins, VCC=5.0v, VDD=3.3V.

So the wiring is:

• MISO -> Resistor 3.3k Ohm -> 3.3v
• MOSI -> Resistor 3.3k Ohm -> 3.3v

That's what works for me.

Chuck.

[cr13]

@stickbreaker ok, I try and I comment. Thank you very much.

[cr13]

hello @stickbreaker, I'm still making the same mistake. Attached is a picture of my circuit. https://drive.google.com/file/d/1dCF0EeIApVoeN3FsdAdVMd1DU_NuqwsW/view?usp=sharing

Is it possible that the module is wrong?

[pipi61]

Hi! check your sd adapter pin voltage level.... The esp use 3.3V level. This sd card use 5Vin-output/3.3V sdcard level converter, check this how to work 3.3/3.3V

[cr13]

@pipi61 great!! That's what it was. I was getting 2.3V, I changed it to 5V and now it's 3.3V. Thank you very much.

Note: you don't need to pullup on the MISO and MOSI pin, but it works anyway.

[Sivapraveen-Entuple]

im working on the sdcard with same file but i need to use different pins for MISO, MOSI, CLK and CS as well, how can i configure the pins for sdcard module via SPI

[chegewara]

https://github.com/espressif/arduino-esp32/blob/master/libraries/SPI/examples/SPI_Multiple_Buses/SPI_Multiple_Buses.ino

https://github.com/espressif/arduino-esp32/blob/master/libraries/SD/src/SD.h#L31