ESP32 and SD Card Core 1 panic'ed

Development Other Hardware Development
1

I'm trying to access the SD Card to display images in LVGL on my CYD and getting 'Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.'

My code is this:

#include <lvgl.h>
#include <TFT_eSPI.h>
#include <XPT2046_Touchscreen.h>
#include <WiFi.h>
#include <WiFiMulti.h>
#include <HTTPClient.h>
WiFiMulti WiFiMulti;
#include <tr064.h>
#include <JSON_Decoder.h>
#include <WiFiUdp.h>
#include <OpenWeather.h>
#include <NTPClient.h>


#define XPT2046_MOSI 32
#define XPT2046_MISO 39
#define XPT2046_CLK 25
#define XPT2046_CS 33


void setup() {
  Serial.begin(115200); /* prepare for possible serial debug */


  FATFS fatfs;
  FIL fil; // File handle
Serial.print(F("Step1 "));
  FRESULT r = f_mount(&fatfs, "0:", 1); // 0: mounts to the Flash
  Serial.print(F("Step2 "));
  if (r != FR_OK)
  {
    Serial.print(F("Error, f_mount failed with error code: "));
    Serial.println(r, DEC);
    while (1)
      yield();
  }
  else
    Serial.println(F("f_mount successful"));

 // Check the image file is there
  r = f_open(&fil, "favicon.bin", FA_READ);
  if (r != FR_OK) {
	Serial.printf("f_open error (%i)\r\n");
  } else
  Serial.printf("I was able to open 'favicon.bin' for reading!\r\n");
  f_close(&fil);

  /** Initialise LVGL FatFs Handler **/  
  lv_fs_fatfs_init();
}
void loop() {
}

It crashes after step 1:
EXCVADDR: 0x00000000 LBEG : 0x4008ad61 LEND : 0x4008ad71 LCOUNT : 0xfffffffe

Backtrace: 0x40138591:0x3ffb0140 0x4013650d:0x3ffb0160 0x401379f4:0x3ffb01a0 0x400d370a:0x3ffb01e0 0x40109d76:0x3ffb2290

ELF file SHA256: 3fbd51baa6baa155

Rebooting...

From ESP Exception decoder I get:

  • 0x40138591: ff_disk_initialize at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/fatfs/diskio/diskio.c:62
  • 0x4013650d: find_volume at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/fatfs/src/ff.c:3258
  • 0x401379f4: f_mount at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/fatfs/src/ff.c:3536
    ...
2

afetr, probably but may be not just after — add Serial.flush(); after each debug print to ensure the code did not go further until you see the print out.

I'm not sure about that. Do you have the right setup for it?

3

You are trying to load from an invalid address. With EXCVADDR: 0x00000000 probably a NULL or unset pointer or an invalid reference.

Run the ESP Exception Decoder on the back trace to get the source line causing the problem.