ESP32S3 ov2640 as a slave device

Less_is_more
Posts: 4
Joined: Fri Dec 29, 2023 8:56 am

ESP32S3 ov2640 as a slave device

Postby Less_is_more » Sun Mar 10, 2024 9:10 pm

I am working on a custom board that was designed by someone else. The board uses ESP32S3 without PSRAM. In the design there is a cst226se touch controller which is working perfectly. I am having trouble initializing the on2640 as I get

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camera: Camera probe failed with error 0x105(ESP_ERR_NOT_FOUND)
all the time. The designer uses 13 lines for interfacing the ov2640.
CAM_RST
CSI_MCLK
I2C_SCL
I2C_SDA
CAM_VSYNC
CSI_D2 to D9
CSI_PCLK
CAM_HSYNC

As I said, the Wire interface is already started for the touch sensor and is working properly. I have tried all known combinations but at vain. The CSI_MCLK line makes me believe the camera should be in slave mode, but I can't make it start. I have even removed all the other code leaving only the camera related stuff but still nothing. My config is as follows:

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camera_config_t cameraConfig;
cameraConfig.pin_reset = CAM_RST;
cameraConfig.pin_pwdn = -1;
cameraConfig.pin_d0 = CSI_D2;
cameraConfig.pin_d1 = CSI_D3;
cameraConfig.pin_d2 = CSI_D4;
cameraConfig.pin_d3 = CSI_D5;
cameraConfig.pin_d4 = CSI_D6;
cameraConfig.pin_d5 = CSI_D7;
cameraConfig.pin_d6 = CSI_D8;
cameraConfig.pin_d7 = CSI_D9;
cameraConfig.pin_href = CAM_HSYNC;
cameraConfig.pin_pclk = CSI_PCLK;
cameraConfig.pin_vsync = CAM_VSYNC;
cameraConfig.pin_xclk = CSI_MCLK;
cameraConfig.xclk_freq_hz = 20000000;
cameraConfig.frame_size = FRAMESIZE_VGA;
cameraConfig.grab_mode = CAMERA_GRAB_WHEN_EMPTY;
cameraConfig.fb_location = CAMERA_FB_IN_DRAM;
cameraConfig.pin_sccb_scl = I2C_SCL;
cameraConfig.pin_sccb_sda = I2C_SDA;
Any help?

liaifat85
Posts: 200
Joined: Wed Dec 06, 2023 2:46 pm

Re: ESP32S3 ov2640 as a slave device

Postby liaifat85 » Tue Mar 12, 2024 1:48 pm

Have you tried according to this video? https://www.youtube.com/watch?v=y50LCIgO-V0
Here is also a Step-by-Step Guide to LVGL GUI Development:
https://wiki.elecrow.com/index.php?titl ... evelopment

Less_is_more
Posts: 4
Joined: Fri Dec 29, 2023 8:56 am

Re: ESP32S3 ov2640 as a slave device

Postby Less_is_more » Tue Mar 12, 2024 5:24 pm

Your reply has nothing to do with the question asked.

Less_is_more
Posts: 4
Joined: Fri Dec 29, 2023 8:56 am

Re: ESP32S3 ov2640 as a slave device

Postby Less_is_more » Tue Mar 12, 2024 7:40 pm

Do I have to initiate the pwm square wave generator on pin CSI_MCLK or the esp_camera library takes care that for me?

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