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Lvgl rate control (#22049)

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David Hoelscher 2023-09-16 23:25:14 -05:00 committed by GitHub
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commit 169b0f33f6
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3 changed files with 14 additions and 2 deletions
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8
docs/quantum_painter_lvgl.md
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@ -53,3 +53,11 @@ The `qp_lvgl_detach` function stops the internal LVGL ticks and releases resourc
## Enabling/Disabling LVGL features :id=lvgl-configuring
You can overwrite LVGL specific features in your `lv_conf.h` file.
## Changing the LVGL task frequency
When LVGL is running, your keyboard's responsiveness may decrease, causing missing keystrokes or encoder rotations, especially during the animation of dynamically-generated content. This occurs because LVGL operates as a scheduled task with a default task rate of five milliseconds. While a fast task rate is advantageous when LVGL is responsible for detecting and processing inputs, it can lead to excessive recalculations of displayed content, which may slow down QMK's matrix scanning. If you rely on QMK instead of LVGL for processing inputs, it can be beneficial to increase the time between calls to the LVGL task handler to better match your preferred display update rate. To do this, add this to your `config.h`:
```c
#define QP_LVGL_TASK_PERIOD 40
```

4
quantum/painter/lvgl/qp_lvgl.c
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@ -81,8 +81,8 @@ bool qp_lvgl_attach(painter_device_t device) {
lvgl_state_t *lv_task_handler_state = &lvgl_states[1];
lv_task_handler_state->fnc_id = 1;
lv_task_handler_state->delay_ms = 5;
lv_task_handler_state->defer_token = defer_exec_advanced(lvgl_executors, 2, 5, tick_task_callback, lv_task_handler_state);
lv_task_handler_state->delay_ms = QP_LVGL_TASK_PERIOD;
lv_task_handler_state->defer_token = defer_exec_advanced(lvgl_executors, 2, QP_LVGL_TASK_PERIOD, tick_task_callback, lv_task_handler_state);
if (lv_task_handler_state->defer_token == INVALID_DEFERRED_TOKEN) {
qp_dprintf("qp_lvgl_attach: fail (could not set up qp_lvgl executor)\n");

4
quantum/painter/lvgl/qp_lvgl.h
View file

@ -7,6 +7,10 @@
#include "qp.h"
#include "lvgl.h"
#ifndef QP_LVGL_TASK_PERIOD
# define QP_LVGL_TASK_PERIOD 5
#endif
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Quantum Painter - LVGL External API