White screen issue, can't seem to find solution

[Cptnyar77]

Hi all,
I am having a white screen issue.
I first tried the Rainbow screen example - no avail.
Then the Read-Write diagnostic
can't seem to figure it out.

IDE: Arduino IDE
Library Vrsn: 2.5.43
Board Manager Vrsn:2.0.17
TFT: R61581
ESP32: DOIT Devkit V1
Using 8-bit parralel

Below is my changes to the User_setup.h Followed by the serial monitor output after code was uploaded

#define R61581_DRIVER

// Tell the library to use 8-bit parallel mode (otherwise SPI is assumed)
#define TFT_PARALLEL_8_BIT

// The ESP32 and TFT the pins used for testing are:
#define TFT_CS 33 // Chip select control pin (library pulls permanently low
#define TFT_DC 15 // Data Command control pin - must use a pin in the range 0-31
#define TFT_RST 32 // Reset pin, toggles on startup

#define TFT_WR 4 // Write strobe control pin - must use a pin in the range 0-31
#define TFT_RD 2 // Read strobe control pin

#define TFT_D0 12 // Must use pins in the range 0-31 for the data bus
#define TFT_D1 13 // so a single register write sets/clears all bits.
#define TFT_D2 26 // Pins can be randomly assigned, this does not affect
#define TFT_D3 25 // TFT screen update performance.
#define TFT_D4 19
#define TFT_D5 21
#define TFT_D6 27
#define TFT_D7 14

==========================================================================

Pixel value written = 80
Pixel value read = CFD3
ERROR ^^^^
Pixel value written = 100
Pixel value read = CFD3
ERROR ^^^^
Pixel value written = 200
Pixel value read = CFD3
ERROR ^^^^
Pixel value written = 400
Pixel value read = CFD3
ERROR ^^^^
Pixel value written = 800
Pixel value read = CFD3

[Basitadam]

Can you run "Read_User_Setup" and send the serial output?

[Cptnyar77]

[code]
TFT_eSPI ver = 2.5.43
Processor = ESP32
Frequency = 240MHz
Transactions = Yes
Interface = Parallel
Display driver = 6158
Display width = 320
Display height = 480

MOSI = GPIO 13
MISO = GPIO 12
SCK = GPIO 14
TFT_CS = GPIO 33
TFT_DC = GPIO 15
TFT_WR = GPIO 4
TFT_RD = GPIO 2

TFT_D0 = GPIO 12
TFT_D1 = GPIO 13
TFT_D2 = GPIO 26
TFT_D3 = GPIO 25
TFT_D4 = GPIO 19
TFT_D5 = GPIO 21
TFT_D6 = GPIO 27
TFT_D7 = GPIO 14

Font GLCD loaded
Font 2 loaded
Font 4 loaded
Font 6 loaded
Font 7 loaded
Font 8 loaded
Smooth font enabled

Do I have to somehow disable the SPI stuff?

[Basitadam]

You shouldn't need to but you can be sure just defining SPI pins as -1. Like #define TFT_SCLK -1

[Cptnyar77]

ReadWrite test still returns all errors.
However now it is returning '0'
instead of 'CFD3'

==========================================
ERROR ^^^^
Pixel value written = 4
Pixel value read = 0
ERROR ^^^^
Pixel value written = 8
Pixel value read = 0
ERROR ^^^^
Pixel value written = 10
Pixel value read = 0
ERROR ^^^^

[Basitadam]

I can't debug further because my ESP32 Board version is 3.0.5. If it won't make any problem, I suggest you upgrade from 2.0.17 to it

[Cptnyar77]

When I ugrade to 3.0.5 i get a compilation error. After searching around a bit, somebody suggested rolling it back.
Something about ExpressIf trying to fix things that aren't broken.

[Basitadam]

That is unfortunate. Can happen when switching form 2.x to 3.x.
is your setup on a breadboard? Removing the display first, connecting D0-D7 lines with pull-up or pull-down resistors might give you a clue. You can debug if your software reads back what you set with the resistors.
Do not connect D0-D7 lines directly to Vcc or GND. They are set to output while sending commands