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docs(indev): add comment in input device part (#3422)

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Man, Jianting (Meco) 2022-06-26 04:32:14 -04:00 committed by GitHub
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docs/porting/indev.md
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@ -5,6 +5,7 @@
To register an input device an `lv_indev_drv_t` variable has to be initialized. **Be sure to register at least one display before you register any input devices.**
```c
/*Register at least one display before you register any input devices*/
lv_disp_drv_register(&disp_drv);
static lv_indev_drv_t indev_drv;