SD lib w/ card 'flakey'?

[ladyada]

heya im using known good hardware, with pullups on the SD CS line, no level shifters, PCB traces not jumpers - but getting 'flakiness' on init/mount

[E][sd_diskio.cpp:99] sdSelectCard(): timeout
[E][sd_diskio.cpp:708] sdcard_mount(): f_mount failed 0x(3)
Card Mount Failed

oddly, it works maybe 10% of the time. once it starts working, it 'keeps' working until a full power reset. if it doesn't work, sometimes hitting software reset helps, but usually not. this is with the SPI library - tried changing SPI speed in SD.begin() without any noticable changes. still investigating ... but making a note here in case others can reproduce

fyi, grabbing the non-optimized SD library works great with no hiccups - https://github.com/adafruit/arduino-esp32/tree/d602169ebcd126c309009e87c1e455f2c892d08f (yeah sorry it got smooshed in the upstream merge so please download the zip from that point to get the library files)

[me-no-dev]

Hm that is rather strange. I had gazillion of issues with SD_MMC and pullups but none with SD. I just connected the 4 data lines directly to SPI and that was it (I use SD->MicroSD with some wires soldered directly on the pads).
Which pins are you using?

[ladyada]

static const uint8_t MOSI = 18;
static const uint8_t MISO = 19;
static const uint8_t SCK = 5;

and cs on any pin really, but im using
#define SD_CS 33

other than the SD card, all other SPI devices ive tested are working perfectly - TFT display, LoRa and RFM radio modules, VS1053

[me-no-dev]

Done :)

[ladyada]

looks good - would you like me to re-test?

[me-no-dev]

Sure :) Confirmation is always good, but I was able to reproduce the issue and after the fix, was not able to anymore, regardless of what I did :) I wonder how it was working while I was developing the library?
BTW I tested with your pin configuration

void mountSdCard(){
    SPI.begin(5,19,18);
    if(!SD.begin(33)){
        Serial.println("Card Mount Failed");
        return;
    }
}

[ladyada]

hiya - ok so for one of my feather setups, with cardcs on IO 27, it now works every time. on another feather, with cs on IO 14 it still doesnt work :/

Initializing SD card...[E][sd_diskio.cpp:99] sdSelectCard(): timeout
[W][sd_diskio.cpp:452] ff_sd_initialize(): GO_IDLE_STATE failed
[E][sd_diskio.cpp:724] sdcard_mount(): f_mount failed 0x(3)
failed!

[me-no-dev]

maybe on io14 there is another issue? I mean, if SPI is properly configured, and you use pins below 34, the lib itself does not care which pin you have selected. It calls digitalWrite to control SS

[ladyada]

yeah unknown. ill investigate more later... :)

[NickWaterton]

Interesting, I am having the same problem. Using the TFT feather wing (CS 14), the SD card works about 50% of the time, using the music maker featherwing, I can't get the same SD card to work at all (also CS 14).

SPI works fine with graphics and music etc, it's just the SD card that is unreliable. If I wasn't having a similar problem (but not as bad) with the TFT featherwing, I'd suspect a bad reader on the music maker.

When I have a chance I'll try it with an M0 or a WICED, see if they work with the music maker.

[badcf00d]

I'm using the same pins as ladyada, coming from the adalogger featherwing, and I can't get the card to mount at all using:

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

void setup() {
  Serial.begin(115200);
  SPI.begin(5, 19, 18);
  if (!SD.begin(33)) {
    Serial.println("Card Mount Failed");
  }
}

SD card works in an M0 datalogger, but no luck with the ESP32 :/

[ladyada]

@me-no-dev hmm do you mind if we send you some hardware that you can test with? the SD card works if we use our ported 'arduino-SD-library' but not with the SD library ya'll included. so I think its some init thing?

[me-no-dev]

@ladyada yes please! let's get this fixed :) How are we going to arrange this?

[me-no-dev]

done :)

[ladyada]

k email addr deleted, we'll reply