ESP32-S3 DevKitC-1 SPI configuration?

Using Arduino Microcontrollers
1

Trying to use a pre v1.1 DevKit with TFT_eSpi graphics library. The FSPI
pin configuration in the technical manual doesn't seem to work ( I've tried it with two different boards ). Anyone had success in using SPI with this library?

2

I have lost my powers of xray vision and mind reading, so if you could post a hand drawn wiring diagram and code that has been formatted by the IDE (Tools/Autoformat) then ^^^ placed between code tags maybe something will happen.

2 Likes
3

Thank you for your response.
The SPI connection to ILI9341 is so: ( I think this is the default )

FSPICS0-GPIO10 -> CS ( ILI9341 )
FSPICLK-GPIO12 -> CLK
FSPIID -GPIO11 -> MOSI
FSPIQ -GPIO13 -> MISO
GPIO8 -> RST
GPIO9 -> DC
These are the values I used in the USER_SETUPS folder for ILI9341.
Then run any of the TFT_eSPI 320x240 examples. I've also tried using arbitrary pin assignments but that hasn't worked. ( Not sure arbitrary pin assignments are possible but what the heck )

Compiles and uploads with no problem but no display. Display power and backlight running from separate supply. Lovyan library works but not when using above pins. So I know the display and leads are ok.
Just trying to find out if anyone has made this SPI display work with this library and what pin configuration they used.

4

and the separate power supply shares a common ground with the ESP32?

5

Yes, all grounds tied together.

6

I used the Adafruit_ILI9341 library with a ESP32-S3 Devkit 1 and a ILI9341 display
File>Examples>Adafruit_ILI9341>graphicstest worked OK

post your code?

7

No problems with the TFT_eSPI, ILI9341 and ESP32S3 Dev kit board here.

Did you make the appropriate changes to the libraries User_Setup.h file ?

8

I'm using User_Setups/Setup70b_ESP32_S3_ILI9342.h configured
with GPIOs 10 (CS), 11 (MOSI), 12 (SCK), 13 (MISO)
GPIO3 (RST) GPIO9 (DC)
Seems like this should be a valid SPI setup. No arbitrary pin setup
works. No other library ( Adafruit_GFX, Lovyan ) will work with the
10, 11,12,13 setup. They will work if I just use an arbitrary pin setup.
So what version of the DevKit do you have? What pinout are you using?
Thanks a bunch, this is kinda puzzling.

9

Hey horace, Yep I've tested with this library using the full pinout
constructor. Works fine as long as I don't use the pins
specified as SPI in the technical manual. No code to post, just set constructor, compile. upload. I'd like to use TFT_eSPI but I can't get it
working.

11

which technical manual?
if I run esp32-spi-default_pins on a ESP32-S3 DevkitC-1 I get

default pins
MOSI: 11
MISO: 13
SCK: 12
SS: 10
SDA: 8
SCL: 9

the pinout I use is

image
image1584×1080 175 KB

12 
MOSI 11
SCK 12
MISO 13

#define ILI9341_DRIVER 
#define TFT_CS    40
#define TFT_DC    42
#define TFT_RST   41
#define TFT_SPI_MODE 0
13

I found out I'm getting this error. I don't have any idea what to do about it .

Guru Meditation Error: Core 1 panic'ed (StoreProhibited). Exception was unhandled.

Core 1 register dump:
PC : 0x42002c57 PS : 0x00060230 A0 : 0x82002d2c A1 : 0x3fcebfd0
A2 : 0x00000010 A3 : 0x00000000 A4 : 0x60004000 A5 : 0x0000000b
A6 : 0x000000ff A7 : 0x00000000 A8 : 0x08000000 A9 : 0x3fcebfa0
A10 : 0x3fc95868 A11 : 0x00000001 A12 : 0x02625a00 A13 : 0xffffffff
A14 : 0x00000031 A15 : 0x00000000 SAR : 0x00000009 EXCCAUSE: 0x0000001d
EXCVADDR: 0x00000010 LBEG : 0x420066c8 LEND : 0x4200670f LCOUNT : 0x00000003

Backtrace: 0x42002c54:0x3fcebfd0 0x42002d29:0x3fcec000 0x42001d01:0x3fcec020 0x4200728a:0x3fcec040 0x4037dc52:0x3fcec060

14

I faced the same issue and did the following as a temporally workaround. Please give it a try.

Temporal solution

Define USE_HSPI_PORT or USE_FSPI_PORT in User_Setup.h.

// The ESP32 has 2 free SPI ports i.e. VSPI and HSPI, the VSPI is the default.
// If the VSPI port is in use and pins are not accessible (e.g. TTGO T-Beam)
// then uncomment the following line:
#define USE_HSPI_PORT // or USE_FSPI_PORT

Related issues on TFT_eSPI repository

I think that this is because different SPI definitions in ESP-IDF are used for each variant of the ESP32, but I'm currently investigating the details.

Edit: My test bench:

  • Arduino IDE 2.3.2
  • Seeed Studio XIAO ESP32S3
    • ESP32 board package: espressif/arduino-esp32 3.0.4
    • PSRAM: Disable
  • Display: ST7789
    • Interface: SPI
    • SPI Frequency: 80MHz
  • Tested on: September 12, 2024
15

Espressif do seem to make regular and significant changes to their core for the Arduino IDE, which does seem to break already published libraries.

I have gone back to Version 2.0.14 to achieve some stability.