Errror linking Omnivision video driver

Question

Hi, 
 I'm new to nRF/Zephyr development and trying to integrate the OV7670 camera with the nRF52840 board. Since there was no driver for this particular camera I ported the one available for OV7725 in the Zephyr SDK. As far as I know I've adjusted all the kconfig files correctly and I've set CONFIG_VIDEO_OV7670 =y in the prj.conf file. The driver seems to be getting compiled when performing west build but I get the following error when building main.c "src/main.c:90: undefined reference to `ov7670_init_0'". I have added the #include <drivers/video.h> so I'm not sure why I'm getting this error. Have I missed a configuration setting?

Øivind · Accepted Answer

Don't worry, I would never judge someone who is trying to learn. :) 
 The first problem is in your main.c, you can't call the init function of a driver like that. Try this instead: 
 const struct device *dev;
dev = device_get_binding("ov7670");
if (dev == NULL) {
 printk("Error: Could not get ov7670 device binding
");
} 
 The CMakeLists.txt I wanted to see was the one in zephyr/drivers/video. But just add this line to it if you haven't already: 
 zephyr_library_sources_ifdef(CONFIG_VIDEO_OV7670	ov7670.c) 
 I also wanted to see the .yaml file you put in zephyr/dts/bindings/video, but as long as it's there it should be fine.

Errror linking Omnivision video driver

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