ESP32Cam基于ZephyrOS无法与OV2640传感器通信求助

我正在尝试在Zephyr RTOS中使用OV2640摄像头传感器，该传感器在Espressif SDK中可正常工作，但切换到Zephyr后遇到初始化问题。

Zephyr SDK自带OV2640驱动，我已完成内核配置并启用该驱动，编译可通过，但调用device_is_ready()始终返回false。启用日志子系统后发现，驱动初始化时首次与传感器通信（读取PID和VER寄存器）就失败。

初始化日志 #

[00:00:01.815,000] <err> i2c_esp32: I2C transfer error: -116
[00:00:01.820,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.825,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.830,000] <err> ov2640: failed to write 0x1 to 0xff
[00:00:01.830,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.835,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.841,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.846,000] <err> ov2640: failed to read 0xa register
[00:00:01.846,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.851,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.856,000] <err> i2c_esp32: I2C transfer error: -14
[00:00:01.861,000] <err> ov2640: failed to read 0xb register
[00:00:01.861,000] <err> ov2640: OV2640 not detected

错误代码说明 #

• -116：ETIMEDOUT（通信超时）
• -14：EFAULT（地址错误或通信故障）

设备树覆盖文件 #

&pinctrl {
    i2c_cam: i2c_cam {
        pinmux = <I2C0_SDA_GPIO26>,
             <I2C0_SCL_GPIO27>;
        bias-pull-up;
        drive-open-drain;
    };
};

&i2c0 {
    sda-gpios = <&gpio0 26 (GPIO_PULL_UP | GPIO_OPEN_DRAIN)>;
    scl-gpios = <&gpio0 27 (GPIO_PULL_UP | GPIO_OPEN_DRAIN)>;
    pinctrl-0 = <&i2c_cam>;
    pinctrl-names = "default";

    ov2640: ov2640@30 {
        compatible = "ovti,ov2640";
        status = "okay";
        reg = <0x30>;
    };
};

目前传感器完全无响应，我不要求功能完全正常，只要能让传感器有响应即可，请问问题出在哪里？

内容的提问来源于stack exchange，提问作者bielu000