The SD Card Slot for the LCD-15143 fails to be detected

Components & Accessories Displays
1

I am using the SparkFun Thing Plus ESP32 U.FL and connected GPIO21 to the SDCS pin of the LCD-15143 display with SD card slot. When I test with the LCD display by itself to draw, it works fine. As soon as I try to access the SD card slot with my 32GB microsd card inserted (which is already formatted as FAT32 with a single partition using the entire space). When using the following code, the output in the serial monitor is:

Testing the LCD15143

No SD card attached

listing root directory

#include "SD.h"
#include "HyperDisplay_KWH018ST01_4WSPI.h" // Click here to get the library: http://librarymanager/All#SparkFun_HyperDisplay_KWH018ST01

#define PWM_PIN 36            // Pin definitions
#define LCDCS_PIN 17
#define SDCS_PIN 21
#define DC_PIN 16
#define SPI_SPEED 32000000        // Requests host uC to use the fastest possible SPI speed up to 4 MHz

KWH018ST01_4WSPI displayModule;           // The KWH018ST01_4WSPI class is used for this breakout, and we will call our object displayModule
File root;

ILI9163C_color_18_t defaultColor; // Global objects are used for default colors so that they are always in-scope
ILI9163C_color_18_t colorLoops[8]; //colors to loop through
uint8_t colorIndex = 0;

void setup() {
  Serial.begin(115200);
  Serial.println("Testing the LCD15143");
  
  SD.begin(SDCS_PIN, SPI, 1000, "/sd", 5, false);
    uint8_t cardType = SD.cardType();

    if(cardType == CARD_NONE){
        Serial.println("No SD card attached");
    }
  
  root = SD.open("/");
  Serial.println("listing root directory");
  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();
    }
    
  displayModule.begin(DC_PIN, LCDCS_PIN, PWM_PIN, SPI, SPI_SPEED);
  displayModule.clearDisplay();

  colorLoops[0] = displayModule.rgbTo18b(  0,  0,  0 );
  colorLoops[1] = displayModule.rgbTo18b(255,  0,  0 );
  colorLoops[2] = displayModule.rgbTo18b(255,255,  0 );
  colorLoops[3] = displayModule.rgbTo18b(  0,255,  0 );
  colorLoops[4] = displayModule.rgbTo18b(  0,255,255 );
  colorLoops[5] = displayModule.rgbTo18b(  0,  0,255 );
  colorLoops[6] = displayModule.rgbTo18b(255,  0,255 );
  colorLoops[7] = displayModule.rgbTo18b(255,255,255 );
}

void loop() {
  ILI9163C_color_18_t color = colorLoops[colorIndex];
  for(uint8_t indi = 0; indi < displayModule.xExt/2; indi+=1)
  {
    displayModule.rectangle(displayModule.xExt/2-1-indi, displayModule.yExt/2-1-indi, displayModule.xExt/2+1+indi, displayModule.yExt/2+1+indi, false, (color_t)&color);
    delay(50);
  }
  if(colorIndex == 8) {
    colorIndex = 0;
  }
  else {
    colorIndex++;
  }
}

Banging my head over this… I can see the SDCS pin voltages changing when I use the logic analyzer from Waveforms when using the Digilent Analog Discovery 2. I took out the return statements earlier so I could see what happens if it progresses further along.

2

Have you tried moving the SD card from one slot to the other? (if using on screen’s slot, swap to Thing Plus slot, or vice-versa?)

I’m guessing either the wrong sd library is being called for the slot, or a mismatch in the library for which pins are actually being used :-/