Trouble getting parallel ili9341 working

[KallDrexx]

I'm sure I'm setting something up wrong, since I'm new to esp32 (been working on Meadow and pi pico devices previously, not using arduino or platformIO).

I have an 8bit paralell ili9341 that came with an arduino style pin layout. Photos for my setup can be seen at this google album, but I soldered it to a prototype board to make it easier to attach to breadboards. While the soldering job is messy I have verified it works by using an Arduino example project. So now I'm trying to get the LCD working against my esp32-s3 using the example LCD project. I've gone through menuconfig and set the LCD model to ili9341, flashed my esp32-s3, and all I get is a white screen, which is consistent with power being on but the correct commands not being sent.

Serial output is at `Display LVGL animation` which seems to mean it's gotten to the point where it's trying to send visuals to the screen, but I have nothing.

The current pinout I have from my LCD (left) to my esp32 devkit are:

• A/5v -> 5v
• B/Gnd -> Gnd
• F/LCD_RD -> 5v (Had to do this on the pico for it to work to keep it held high
• G/LCD_WR -> gpio21
• H/LCD_RS -> gpio47
• I/LCD_CS -> gpio48
• J/LCD_RST -> gpio45
• M/LCD_07 -> gpio39
• N/LCD_06 -> gpio40
• O/LCD_05 -> gpio41
• P/LCD_04 -> gpio42
• Q/LCD_03 -> gpio2
• R/LCD_02 -> gpio1
• S/LCD_01 -> gpio44
• T/LCD_00 -> gpio43

I modified the example code pinouts to match

Code: Select all

#define EXAMPLE_PIN_NUM_DATA0          43
#define EXAMPLE_PIN_NUM_DATA1          44
#define EXAMPLE_PIN_NUM_DATA2          1
#define EXAMPLE_PIN_NUM_DATA3          2
#define EXAMPLE_PIN_NUM_DATA4          42
#define EXAMPLE_PIN_NUM_DATA5          41
#define EXAMPLE_PIN_NUM_DATA6          40
#define EXAMPLE_PIN_NUM_DATA7          39

#define EXAMPLE_PIN_NUM_PCLK           21
#define EXAMPLE_PIN_NUM_CS             48
#define EXAMPLE_PIN_NUM_DC             47
#define EXAMPLE_PIN_NUM_RST            45
#define EXAMPLE_PIN_NUM_BK_LIGHT       4

#define EXAMPLE_LCD_H_RES              240
#define EXAMPLE_LCD_V_RES              320

I didn't see anything else that made sense modify. I set backlight to an unused pin since I don't have a pinout for it and don't need to do anything for it currently (at least from my tests on the pi pico).

Anyone see anything obvious for what I'm doing wrong?

[KallDrexx]

Well I instead reverted the code and redid the wiring to match the original example, and it works. So I must either be using pins that I shouldn't be using, or wired something wrong.