ESP32 with ov2640 does not work in RGB565 mode

Projects General Guidance
1

Hello everyone,

I have an ESP32-S3 WROOM (N16R8) equipped with an ov2640 camera.

I am working with the Arduino IDE and, using the example/ESP32/camera/CameraWebServer sketch, everything works fine in JPEG mode.

However, I can't get it to work in RGB565 or GRAYSCALE mode. Regardless of the config.xclk_freq_hz frequency between 2 and 20 MHz and regardless of the size used (less than FRAMESIZE_320X320), I always get the same message:

Camera init OK 0x0E (1241) cam_hal: DMA overflow
Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception).
Debug exception reason: Stack canary watchpoint triggered (cam_task)

and the ESP32 reboots.

Any idea what the problem is and how to solve it?

Best regards.

Pierre

2

Anyh of those I have messed with I just clicked the setting on the mini GUI the web page presents and they all worked fine. Do you have a web page gui to work with?

3

Which IDE and ESP32 Core version are you using ?

It seems that Expressif do have a problem with their latest 'revision' of their core;

https://github.com/espressif/arduino-esp32/issues/11674

4

@sonofcy : I have a web page that is OK when I use the JPEG mode.

@srnet : my IDE is 2.3.6 and the Espressif is 3.3.0

I going to try with an older version : 3.2.1

Best regard.

Pierre.

5

@srnet : Great, it works well with the previous version. Thank you very much.

Best regards.

Pierre.

6

Recently Expressif seem to have been introducing quite a few 'issues' with the constant revisions of their core.

If you have a version of the core that's stable for your purposes, its probably best to stick with it rather than upgrade and find previous sketches and code no longer work.

7

Sure, you are wright.

Best regards.

Pierre