Guru Meditation Error on tft.begin() (ESP32-S3 dev module)

[HSBallina]

I'm having issues with my ESP32-S3 module crashing and rebooting on tft.begin() (or on tft.init()). The following output repeats over and over in the monitor:

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x2b (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3808,len:0x4bc
load:0x403c9700,len:0xbd8
load:0x403cc700,len:0x2a0c
entry 0x403c98d0
E (99) esp_core_dump_flash: Core dump data check failed:
Calculated checksum='db82bb1c'
Image checksum='ffffffff'
Guru Meditation Error: Core  1 panic'ed (StoreProhibited). Exception was unhandled.

Core  1 register dump:
PC      : 0x4200289b  PS      : 0x00060a30  A0      : 0x82002928  A1      : 0x3fcebd80  
A2      : 0x00000010  A3      : 0x00000000  A4      : 0x60004000  A5      : 0x00000015  
A6      : 0x000000ff  A7      : 0x00000001  A8      : 0x08000000  A9      : 0x3fcebd50  
A10     : 0x3fc952b0  A11     : 0x00000001  A12     : 0xffffffff  A13     : 0x00000010  
A14     : 0x00000000  A15     : 0x3fc91d98  SAR     : 0x00000010  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x00000010  LBEG    : 0x42004dec  LEND    : 0x42004e4f  LCOUNT  : 0x00000003  

Backtrace: 0x42002898:0x3fcebd80 0x42002925:0x3fcebdb0 0x42002930:0x3fcebdd0 0x4200184d:0x3fcebdf0 0x420058da:0x3fcebe20

Using the EspExceptionDecoder to decode the dump (only works in Arduino 1.8.19) with the ELF file from the build gives this:

PC: 0x4200289b: TFT_eSPI::writecommand(unsigned char) at C:\Users\stompp\Documents\Arduino\libraries\TFT_eSPI\TFT_eSPI.cpp line 81
EXCVADDR: 0x00000010

Decoding stack results
0x42002898: TFT_eSPI::writecommand(unsigned char) at C:\Users\stompp\Documents\Arduino\libraries\TFT_eSPI\TFT_eSPI.cpp line 81
0x42002925: TFT_eSPI::init(unsigned char) at C:\Users\stompp\Documents\Arduino\libraries\TFT_eSPI\TFT_eSPI.cpp line 692
0x42002930: TFT_eSPI::begin(unsigned char) at C:\Users\stompp\Documents\Arduino\libraries\TFT_eSPI\TFT_eSPI.cpp line 603
0x4200184d: setup() at C:\DEV\ESP32\minimal_tft/minimal_tft.ino line 7
0x420058da: loopTask(void*) at C:\Users\stompp\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.15\cores\esp32\main.cpp line 42

I've minimized the code to the following:

#include <SPI.h>
#include <TFT_eSPI.h>

TFT_eSPI tft = TFT_eSPI();
void setup() {
  Serial.begin(115200);
  tft.begin();
}

void loop() {
}

My setup is the following: IDE: Arduino 1.8.19 & 2.3.2 TFT_eSPI version: 2.5.43 Board package version: 2.0.15 Processor: ESP32-S3 TFT driver: GC9A01 Interface: SPI

The setup file is a copy of 46 with a different MOSI pin. It's added to the User_Setup_Select.h file and the User_Setup.h is set to use the GC9A01 driver.

[dbtronics]

Please refer to this link: https://github.com/Bodmer/TFT_eSPI/issues/3304#issuecomment-2095080442

Revert your ESP32 board package to 2.0.14 will solve this issue.

[AlexBestoso]

Edit: The issue is likely misconfiguration of your SPI pins.

I was able to get my ESP32-S3 to work (Specifically the Lillygo T-deck) by using these pin configurations in my User_Setup.h file.

The StoreProhibited is resulting from your spi driver trying to access an invalid pin, thus invalid memory.

#define TFT_MISO 38
#define TFT_MOSI 41
#define TFT_SCLK 40
#define TFT_CS   12 // Not connected
#define TFT_DC   11
#define TFT_RST  -1  //

Please refer to this link: #3304 (comment)

Revert your ESP32 board package to 2.0.14 will solve this issue.

Downgrading to potentially vulnerable software is not a solution.