Rp2040: can't get SD card reader to initialize

Projects Programming
1

Hi,

I'm trying to get my SD card module initialized, but no matter what I try, I just can't get it to work.

I've written a simple code:

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

// Definition der Pins
const int chipSelect = 1; // GP1 (CSn)

void setup() {
  Serial.begin(9600);
  while (!Serial) {
  }

  SPI.setRX(0); // GP0 als MISO
  SPI.setTX(3); // GP3 als MOSI
  SPI.setSCK(2); // GP2 als SCK
  SPI.begin();

  Serial.print("InitializeSD-Card...");
  if (!SD.begin(chipSelect)) {
    Serial.println("SD-card couldn't be initialized.");
    return;
  }
  Serial.println("succesfull");
}

void loop() {
}

I am using a Pimoroni tiny rp2040, here is a photo of the pinout

19278_5
19278_5902×556 135 KB

I can't figure out what I'm doing wrong.
I appreciate any help I can get on this.

Thanks in advance!
Luca

2

if I run your code on a Raspberry Pi Pico RP2040 it works OK - serial monitor displays

InitializeSD-Card...succesfull

image
image744×768 54.9 KB

EDIT: if I run File>Examples>SD>CardInfo with the SPI pin definitions

const int _MISO = 0;  // AKA SPI RX
const int _MOSI = 3;  // AKA SPI TX
const int _CS = 1;
const int _SCK = 2;

serial monitor displays

Initializing SD card...
Wiring is correct and a card is present.

Card type:         Unknown
Cluster size:          16384
Blocks x Cluster:  32
Blocks size:  512
Total Blocks:      247616

Total Cluster:      7738

Volume type is:    FAT16
Volume size (Kb):  126779
Volume size (Mb):  123
Volume size (Gb):  0.12
Card size:  126779.39
Total bytes: 126779392
Used bytes: 147456
System Volume Information/
	IndexerVolumeGuid		76	CREATION: 2023-08-13 16:43:42	LAST WRITE: 2023-08-13 16:43:44
data.txt		486	CREATION: 2021-01-01 00:00:04	LAST WRITE: 2021-01-01 00:00:20
test.txt		77824	CREATION: 1980-01-01 00:00:00	LAST WRITE: 1980-01-01 00:00:00
foo.txt		13	CREATION: 1980-01-01 00:00:00	LAST WRITE: 1980-01-01 00:00:00
3

Oh thanks for testing it out! I now soldered the contacts directly on to an SD-Micro SD Adapter and this worked! So it must have something to do with my micro SD module.