ESP32-S2 Feather & SD card

Projects Networking, Protocols, and Devices
1

Hello,

I am trying to connect an SD card to an ESP32 Feather.

ESP32 : ESP32-S2 Feather - 2 Mo PSRAM et Stemma QT/Qwiic Adafruit 5000

SD card :

Here's the code

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

#define CS_SD 10  

SPIClass spiSD = SPIClass(SPI);

void setup() {
    Serial.begin(115200);
    while (!Serial);
    delay(1000);
    Serial.println("🔹 Début du programme...");

    // Initialisation SPI
    spiSD.begin(36, 37, 35, CS_SD);  // SCK, MISO, MOSI, CS

    pinMode(CS_SD, OUTPUT);
    digitalWrite(CS_SD, HIGH);
    
    Serial.println("🟡 Initialisation de la carte SD...");
    digitalWrite(CS_SD, LOW);

    if (!SD.begin(CS_SD, spiSD)) {
        Serial.println("❌ Erreur : Impossible d'initialiser la carte SD !");
    } else {
        Serial.println("✅ Carte SD détectée et initialisée !");
    }
}

void loop() {
}

Could you help me?

Thank you.

2

SPI is the object which is defined in SPI.cpp as follows:

#if CONFIG_IDF_TARGET_ESP32
SPIClass SPI(VSPI);
#else
SPIClass SPI(FSPI);
#endif

So you cannot pass SPI to the constructor of SPIClass.

And you don't need this line:

36, 37, 35 are already defined as SCK, MISO, and MOSI. See pins_arduino.h of your board:

static const uint8_t SS = 42;
static const uint8_t MOSI = 35;
static const uint8_t SCK = 36;
static const uint8_t MISO = 37;

Also I think those are assigned to SPI by default. So the following line

could be OK as:

    if (!SD.begin(CS_SD)) {
3

Note:
FSPI, HSPI or VSPI are just the symbols defined in esp32-hal-spi.h

#ifdef CONFIG_IDF_TARGET_ESP32S2
#define FSPI 1  //SPI 1 bus. ESP32S2: for external memory only (can use the same data lines but different SS)
#define HSPI 2  //SPI 2 bus. ESP32S2: external memory or device  - it can be matrixed to any pins
#define SPI2 2  // Another name for ESP32S2 SPI 2
#define SPI3 3  //SPI 3 bus. ESP32S2: device only - it can be matrixed to any pins
#elif CONFIG_IDF_TARGET_ESP32
#define FSPI 1  //SPI 1 bus attached to the flash (can use the same data lines but different SS)
#define HSPI 2  //SPI 2 bus normally mapped to pins 12 - 15, but can be matrixed to any pins
#define VSPI 3  //SPI 3 bus normally attached to pins 5, 18, 19 and 23, but can be matrixed to any pins
#else
#define FSPI 0
#define HSPI 1
#endif

Be careful as those can be confused with the global object SPI :wink:

4

Did you try the SD_Test example?
Files->Examples->SD->SD_Test

5

Thanks to your reply, i try a start with the basic example but its fails.
that's why i tried to redefine the SPI
Thank for the link : arduino-esp32/variants/adafruit_feather_esp32s2/pins_arduino.h at master · espressif/arduino-esp32 · GitHub

i retry

Thank

6

Then there is something wrong with your wiring,
Do you have the module connected to 5V or 3.3V?

7

3.3V, i dont have 5V on my chip
Thanks

8

Your feather has a pin marked USB, that is 5V.
Your SD card has a pin labeled VCC.
Connect VCC pin to USB pin

Then try the example code.

9

It's OK with 5V and simplify code !
Thanks

10

So 5V was the problem and not the code?

11

I go back to my initial code and 5V and all worked !
Thank

12

Yeah, some of those modules claim they can work on 3.3V or 5V but really need 5V, that is why I asked.

Glad it worked
Have a nice day!

13

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