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docs(porting) clarify that displays must be registered before input devices

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Related: #2844 (thanks @SgtPepperFTW)
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embeddedt
2021-11-28 20:41:18 -05:00
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parent 5433e0bc2a
commit 1c64b78866
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docs/porting/indev.md
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@@ -6,9 +6,11 @@
## Types of input devices
To register an input device an `lv_indev_drv_t` variable has to be initialized:
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
lv_disp_drv_register(&disp_drv);
static lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv); /*Basic initialization*/
indev_drv.type =... /*See below.*/