Ov2640 reset eroor on soft reboots

[donny681]

Why ov2640 reset eroor on soft reboots.I use logic analyzer to catch signal,it seems that the camera don't respose ack after soft reboots.And how to fix it.

Getting an error during i2c check of camera: D (1843) camera: Detected camera at address=0x30 D (1853) camera: Camera PID=0x00 VER=0x00 MIDL=0x00 MIDH=0x00

[igrr]

I think this was previously mentioned in another issue: https://github.com/igrr/esp32-cam-demo/issues/15#issuecomment-278886227

For some reason I haven't had issues with reset though. Maybe @Oitzu has some idea.

[donny681]

@igrr I add GPIOs interrupt to the project and find that GPIO can't go to the isr after getting a frame.Before getting a frame ,GPIOs can go to the isr.I try to register isr again but it is no use.

[donny681]

@igrr @Oitzu I fix the bug that ov2640 reset errror. The reg(0xff) of the sensor must be programmed 0x01 after reset the camera. ` gpio_set_level(config->pin_reset, 0);

delay(10);

gpio_set_level(config->pin_reset, 1);

delay(10);

/*after reseting the sensor,the reg (0xff) must be programmed 0x01*/
uint8_t buf[] = {0xff, 0x01};
        twi_writeTo(0x30, buf, 2, true);
        delay(100);
ESP_LOGD(TAG, "Searching for camera address");
/* Probe the sensor */
delay(10);
uint8_t slv_addr = SCCB_Probe();
if (slv_addr == 0) {
    *out_camera_model = CAMERA_NONE;
    return ESP_ERR_CAMERA_NOT_DETECTED;
}
s_state->sensor.slv_addr = slv_addr;
ESP_LOGD(TAG, "Detected camera at address=0x%02x", slv_addr);`

[lss6378]

@donny681 Think you so much! It works!

[sravanth005]

in the ESP32 Ai thinker CAM there is a reset button does any one know what signal does reset button generates