Need help with camera and screen project

TheRealThreeeye
Posts: 2
Joined: Thu Jul 16, 2026 12:29 pm

Need help with camera and screen project

Postby TheRealThreeeye » Sat Jul 18, 2026 4:03 pm

Hardware:
ESP: ESP-32-S3-WROOM-1
Camera: OV5640 (18 pins)
Screen: ST7789V (2inch, 240x320) (8 pins)

Dev setup:
OS: Linux Mint 23
IDE: VS Code
ESP-IDF: v6.0.1

Problem:
I'm trying to get the screen to show the camera, but it's all messed up.
I'm trying (Claude is trying) to modify a dvp_spi_lcd example with no real luck...
I'm attaching the dvp_spi_lcd_main.c, some logs and a photo of the screen.

Current physical pins to GPIO:
Screen:
VCC > 3.3v
GND > GND
DIN > GPIO 11
CLK > GPIO 12
CS > GPIO 21
DC > GPIO 47
RST > 3.3v
BL > GPIO 18

Camera:
3.3v > 3.3v
GND > GND
SIOC > GPIO 4
SIOD > GPIO 5
VSYNC > GPIO 14
HREF > GPIO 16
PCLK > GPIO 13
XCLK > GPIO 10
D9 > GPIO 40
D8 > GPIO 48
D7 > GPIO 45
D6 > GPIO 9
D5 > GPIO 8
D4 > GPIO 17
D3 > GPIO 7
D2 > GPIO 6
RST > not connected
PWDN > GND

Main/CMakeLists.txt (I guess the attachment limit is 3 files...):
idf_component_register(SRCS "dvp_spi_lcd_main.c"
INCLUDE_DIRS "."
REQUIRES esp_lcd driver esp_driver_ledc esp_camera)

Note:
If you'll suggest changing the GPIO pins, keep in mind that I need pins for buttons that'll be under a Resistor Ladder, and some sort of a battery % monitor...

Thanks for the help.
Attachments
20260718_113447.JPG
20260718_113447.JPG (2.29 MiB) Viewed 49 times
Logs.txt
(5.75 KiB) Not downloaded yet
dvp_spi_lcd_main.c
(10.14 KiB) Downloaded 2 times

nopnop2002
Posts: 356
Joined: Thu Oct 03, 2019 10:52 pm
Contact:

Re: Need help with camera and screen project

Postby nopnop2002 » Sun Jul 19, 2026 12:36 pm

Code: Select all

        .pixel_format   = PIXFORMAT_RGB565,

You can use JPEG as the camera's capture format.

Here is an example of displaying JPEGs on the ST7789.
https://github.com/nopnop2002/esp-idf-st7789

TheRealThreeeye
Posts: 2
Joined: Thu Jul 16, 2026 12:29 pm

Re: Need help with camera and screen project

Postby TheRealThreeeye » Sun Jul 19, 2026 1:18 pm

Thanks for the replay.
But I'm stuck on displaying the camera feed...
I might have forgot to mention that the screen is showing what is "supposed" to be me waving my hand in front of the camera.

The colors are all wrong, and it's very grainy.

Thanks

nopnop2002
Posts: 356
Joined: Thu Oct 03, 2019 10:52 pm
Contact:

Re: Need help with camera and screen project

Postby nopnop2002 » Mon Jul 20, 2026 2:48 am

Is there a possibility that R and B are swapped?

Code: Select all

                uint32_t r = ((p0 >> 11) & 0x1F) + ((p1 >> 11) & 0x1F)
                           + ((p2 >> 11) & 0x1F) + ((p3 >> 11) & 0x1F);
                uint32_t g = ((p0 >> 5) & 0x3F) + ((p1 >> 5) & 0x3F)
                           + ((p2 >> 5) & 0x3F) + ((p3 >> 5) & 0x3F);
                uint32_t bl = (p0 & 0x1F) + (p1 & 0x1F)
                            + (p2 & 0x1F) + (p3 & 0x1F);

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