Image capture problem

[4324250]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occurs?

always

Expected behavior

Hello, my problem is that when displaying the image captured by ov5640 it does not show a valid image, I tried several configurations and it always returns the same image.

camera_config_t camera_config = {
    .pin_pwdn = CAM_PIN_PWDN,
    .pin_reset = CAM_PIN_RESET,
    .pin_xclk = CAM_PIN_XCLK,
    .pin_sccb_sda = CAM_PIN_SIOD,
    .pin_sccb_scl = CAM_PIN_SIOC,

    .pin_d7 = CAM_PIN_D9,
    .pin_d6 = CAM_PIN_D8,
    .pin_d5 = CAM_PIN_D7,
    .pin_d4 = CAM_PIN_D6,
    .pin_d3 = CAM_PIN_D5,
    .pin_d2 = CAM_PIN_D4,
    .pin_d0 = CAM_PIN_D2,
    .pin_d1 = CAM_PIN_D3,
    .pin_vsync = CAM_PIN_VSYNC,
    .pin_href = CAM_PIN_HREF,
    .pin_pclk = CAM_PIN_PCLK,

    // XCLK 20MHz or 10MHz for OV2640 double FPS (Experimental)
    .xclk_freq_hz = 16000000,
    .ledc_timer = LEDC_TIMER_0,
    .ledc_channel = LEDC_CHANNEL_0,

    .pixel_format = PIXFORMAT_RGB565, // YUV422,GRAYSCALE,RGB565,JPEG
    .frame_size = FRAMESIZE_96X96,    // QQVGA-UXGA, For ESP32, do not use sizes above QVGA when not JPEG. The performance of the ESP32-S series has improved a lot, but JPEG mode always gives better frame rates.

    .jpeg_quality = 12, // 0-63, for OV series camera sensors, lower number means higher quality
    .fb_count = 2,      // When jpeg mode is used, if fb_count more than one, the driver will work in continuous mode.
    .fb_location = CAMERA_FB_IN_PSRAM,
    .grab_mode = CAMERA_GRAB_LATEST,

Actual behavior (suspected bug)

..

Error logs or terminal output

..

Steps to reproduce the behavior

..

Project release version

utilmo

System architecture

Intel/AMD 64-bit (modern PC, older Mac)

Operating system

Linux

Operating system version

debian

Shell

ZSH

Additional context

No response

[me-no-dev]

Which chip are you using?

[4324250]

esp32s3 r8n8 the idea is to take a photo using psram and then send it over the network. probe rgb565 takes the capture but it looks bad and when I use jpeg it returns the buffer to NULL thank you. El vie, 31 ene 2025 a las 18:24, Me No Dev ***@***.***>) escribió:

…

Which chip are you using? — Reply to this email directly, view it on GitHub <#720 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ATMA77LVD4UX62NZZS7R6ZD2NPSYRAVCNFSM6AAAAABWICXI5CVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMRYGQZDGMRZGE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[me-no-dev]

try with XCLK 20MHz, not 16MHz

[4324250]

Hi, thanks for the reply, but I tried with 20MHz
result :
E (4529) cam_hal: cam_dma_config(330): DMA buffer 153600 Byte malloc failed, the current largest free block:31744 Byte
E (4539) cam_hal: cam_config(414): cam_dma_config failed
E (4539) gdma: gdma_disconnect(283): no peripheral is connected to the channel
The idea is to be able to take a photo and save it in psram but if I configure it at 20mhz
cam_obj->psram_mode = (config->xclk_freq_hz == 16000000);
it sets psram to false
and when I use jpeg the buffer returns NULL