ESP32_WROOM_30 + Waveshare 4inch Touch Shield

[robymak]

Hello everyone,
I have a problem getting the ESP32 WROOM 30 to work with the Waveshare 4" TFT Touch Shield display ( ILI9486).
I suppose the set is not compatible .
My display configuration is as follows:

Vin 5Vdc 
CS -> D15
DC -> D02
RST -> D04
MOSI -> D23
MISO -> D19
SCLK -> D18
TOUCH CS -> D21

I tested many sketches, without reach results.
Do you have anything to suggest to me?
Thank you, Roberto

[ZinggJM]

I count eight 4" TFT displays on the Waveshare website (some can be excluded).
Post a link to your display and state the libraries you tried. Also link to processor board.
Else you might never get a useful answer.

[robymak]

Hi,
for the display, I am referring to the Waveshare 4inch Touch LCD Shield for Arduino SK 13587 (https://www.waveshare.com/product/displays/lcd-oled/lcd-oled-2/4inch-tft-touch-shield.htm).
I also used the manufacturer's recommended libraries for ILI9486 and particularly the recommended Waveshare demo (https://www.waveshare.com/wiki/File:4inch_TFT_Touch_Shield_Code_V2.0.7z).
I also (naively and unsuccessfully) tried to utilise the ST7735 and SEPS525 controllers.

Thank you, Roberto

[ZinggJM]

@robymak

ESP32 WROOM 30

I am too lazy to go search for that board. Does it have UNO type of headers?

I am also too lazy to check if the Waveshare code can be used with ESP32.

I would recommend to use TFT_eSPI with ESP32.
Note that (at first sight) the display has a SPI to parallel convert circuit (kludge), known as RPi version by TFT_eSPI.

Added: I just found my Waveshare 3.5" TFT display.
It looks the same. It also works with my ILI9486_SPI library.

[robymak]

I loaded the example 'HelloWord.ino' from your library ILI9486_SPI. I modified the CS, DC and RST addresses, as I have shown above.

The compilation runs without errors, the sketch is loaded but the display remains empty.

In addition, I see an infinite loop on the serial monitor, as follows:

E (123) spi_flash: Detected size(4096k) smaller than the size in the binary image header(16384k). Probe failed.

 assert failed: do_core_init startup.c:298 (flash_ret == ESP_OK)

 Backtrace:0x400833d1:0x3ffe3aa00x40087cfd:0x3ffe3ac0 0x4008ca49:0x3ffe3ae0 0x400dbb22:0x3ffe3c10 0x40082aed:0x3ffe3c40 0x400792ca:0x3ffe3c90 |<-CORRUPTED

Bye, Roberto

[Idahowalker]

Did you put the back trace info into the ESP32 exception decoder?

At this point.

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Please describe the problem better then you just did.

I tend to shy away from using GPIO_NUM_2 on the ESP32 as it drives the built in LED and under particular thingies can cause issue. Use GPIO_NUM_0 instead.

For CS pins on the ESP32 I tend to use GPIO_NUM_5 first and GPIO_NUM_15 second.

[ZinggJM]

Sketch uses 262685 bytes (20%) of program storage space. Maximum is 1310720 bytes.
Global variables use 16856 bytes (5%) of dynamic memory, leaving 310824 bytes for local variables. Maximum is 327680 bytes.

@robymak

E (123) spi_flash: Detected size(4096k) smaller than the size in the binary image header(16384k). Probe failed.

Much less than the claimed 16MB in your image header. Did you try at least twice?

But I will keep silent until I know your processor board and the board you select for compilation.

[robymak]

This is my schematic:

and my display:

and my bredboard :

I use an ESP32-WROOM 30pin :

but I can't find GPIO_NUM_0.

How can I identify it?

Roberto

[robymak]

@ZinggJM

Sketch uses 262685 bytes (20%) of program storage space. Maximum is 1310720 bytes.
Global variables use 16856 bytes (5%) of dynamic memory, leaving 310824 bytes for local variables. Maximum is 327680 bytes.

@robymak

E (123) spi_flash: Detected size(4096k) smaller than the size in the binary image header(16384k). Probe failed.

Much less than the claimed 16MB in your image header. Did you try at least twice?

But I will keep silent until I know your processor board and the board you select for compilation.

Yes, I have tried to compile it at least four times, but the result is always the same...

Roberto

[robymak]

I was not very convinced about how the system worked.

I masked 'Serial.begin(115200)', proceeded with a new compilation, but the serial monitor of the IDE continued to run...

I tried setting "Serial.begin(9600)" , with a new compilation, but apart from the unreadability, nothing changed.

I changed the processor to a new one... to no results.

The system kept giving me (in a continuous loop) the following message:

Citation:
ELF file SHA256: 000000000000
->
-> Rebooting...
-> ets Jul 29 2019 12:21:46
->
-> rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
-> configsip:0, SPIWP:0xee
-> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
-> mode:DIO, clock div:1
-> load:0x3fff0030,len:1344
-> load:0x40078000,len:13864
-> load:0x40080400,len:3608
-> entry 0x400805f0
-> E (118) spi_flash: Detected size(4096k) smaller than the size in the binary image header(16384k). Probe failed.
->
-> assert failed: do_core_init startup.c:298 (flash_ret == ESP_OK)
->
->
-> Backtrace:0x400832f5:0x3ffe3aa00x400871ad:0x3ffe3ac0 0x4008bcbd:0x3ffe3ae0 0x400dab1a:0x3ffe3c10 0x40082a11:0x3ffe3c40 0x400792ca:0x3ffe3c90 |<-CORRUPTED

I too am in a loop

Roberto

[ZinggJM]

@ZinggJM

and the board you select for compilation.

Ok, I assume you compile for ESP32 Dev Module. But I expected to get this information!

Ok, I try to be kind and inform you that you most likely have selected Flash Size 16MB, but your board has 4MB.

[robymak]

Yes, I have an ESP32 Dev Module.
Compiling the sketch with te Flash Size to 4Mb, the the endless loop of the serial disappears and I see the benchmark.
The TFT screen continues to remain blank.
Thank you, Roberto

[ZinggJM]

https://www.waveshare.com/wiki/4inch_TFT_Touch_Shield:

• If the Arduino board does not have an ICSP interface, set the SPI Config switches on the display module to SCLK\D13, MISO\D12, MOSI\D11 respectively.

https://www.waveshare.com/w/upload/1/17/4inch_TFT_Touch_Shield_Schematic.pdf

Most likely my last response.

[Idahowalker]

@robymak

but I can't find GPIO_NUM_0.

How can I identify it?

Roberto

I guess the maker of your ESP32 module did not include GPIO_NUM_0. Actually, they failed to include several other ESP32 pins.

If you disconnect 'everything' does the endless loop go away?

[robymak]

Yes, it disappears, especially if I use the Flash Size 4MB.
I will soon be modifying my prototype with an ESP32-WROOM-32 Pinout, to avoid all possible problems.
Thank you, Roberto

[robymak]

I have modified my prototype board with an ESP32-WROOM-DEVKIT-32 pin and connected it as shown in the attached diagram, but I still cannot get it to run....

I am running out of time and patience
After many attempts I have no more ideas...

[robymak]

I tried everything the Web and GitHub showed for the combination of ESP32 and Waveshare 4 "TFT, without having any results.

Thank you all those who came to help me and I'm going to change TFT ...

Thanks, Roberto

[ZinggJM]

Did you check the setting of the SPI switches on your display board? See post #13.

[robymak]

Yes, sir.
I tried every possible combination of the TFT board.
Unfortunately to no effect...
Thank you, Roberto