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Lee Lup Yuen 2023-01-25 16:43:22 +08:00
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README.md
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@ -6142,9 +6142,9 @@ Let's look at our Callback Function for the LVGL Keyboard...
# Handle Input from LVGL Keyboard
TODO
Here's the Callback Function that handles input from the LVGL Keyboard.
[lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/a37872d85c865557bee740cecd6adc35ae3197d2/examples/lvgldemo/lvgldemo.c#L417-L466)
It waits for the Enter key to be pressed, then it sends the typed command to NSH Shell via a POSIX Pipe: [lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/a37872d85c865557bee740cecd6adc35ae3197d2/examples/lvgldemo/lvgldemo.c#L417-L466)
```c
// Callback Function for NSH Input Text Area.
@ -6192,10 +6192,13 @@ static void input_callback(lv_event_t *e) {
}
```
The command runs in NSH Shell and produces NSH Output. Which is handled by the LVGL Timer Callback Function...
# Handle Output from NSH Shell
TODO: Write the NSH Output to LVGL Label Widget
Our LVGL Timer Callback Function checks periodically whether there's any NSH Output waiting to be processed.
If there's NSH Output, the Callback Function writes the output to the NSH Output Text Area:
[lvgldemo.c](https://github.com/lupyuen2/wip-pinephone-nuttx-apps/blob/a37872d85c865557bee740cecd6adc35ae3197d2/examples/lvgldemo/lvgldemo.c#L320-L372)
```c
@ -6222,6 +6225,12 @@ static void timer_callback(lv_timer_t *timer) {
}
```
`remove_escape_codes` searches for Escape Codes in the NSH Output and replaces them by spaces.
That's why we see 3 spaces between the `nsh>` prompt and the NSH Command...
![3 spaces between the `nsh>` prompt and the NSH Command](https://lupyuen.github.io/images/lvgl2-terminal3.jpg)
# Test Logs
This section contains PinePhone NuttX Logs captured from various tests...