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// Copyright 2022 Jose Pablo Ramirez (@jpe230)
// Copyright 2022 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-2.0-or-later
#include "qp_lvgl.h"
#include "timer.h"
#include "deferred_exec.h"
#include "lvgl.h"
typedef struct lvgl_state_t {
uint8_t fnc_id; // Ideally this should be the pointer of the function to run
uint16_t delay_ms;
deferred_token defer_token;
} lvgl_state_t;
static deferred_executor_t lvgl_executors[2] = {0}; // For lv_tick_inc and lv_task_handler
static lvgl_state_t lvgl_states[2] = {0}; // For lv_tick_inc and lv_task_handler
painter_device_t selected_display = NULL;
void * color_buffer = NULL;
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Quantum Painter LVGL Integration Internal: qp_lvgl_flush
void qp_lvgl_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p) {
if (selected_display) {
uint32_t number_pixels = (area->x2 - area->x1 + 1) * (area->y2 - area->y1 + 1);
qp_viewport(selected_display, area->x1, area->y1, area->x2, area->y2);
qp_pixdata(selected_display, (void *)color_p, number_pixels);
qp_flush(selected_display);
lv_disp_flush_ready(disp);
}
}
static uint32_t tick_task_callback(uint32_t trigger_time, void *cb_arg) {
lvgl_state_t * state = (lvgl_state_t *)cb_arg;
static uint32_t last_tick = 0;
switch (state->fnc_id) {
case 0: {
uint32_t now = timer_read32();
lv_tick_inc(TIMER_DIFF_32(now, last_tick));
last_tick = now;
} break;
case 1:
lv_task_handler();
break;
default:
break;
}
// The tasks should run indefinitely
return state->delay_ms;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Quantum Painter LVGL Integration API: qp_lvgl_attach
bool qp_lvgl_attach(painter_device_t device) {
qp_dprintf("qp_lvgl_start: entry\n");
qp_lvgl_detach();
painter_driver_t *driver = (painter_driver_t *)device;
if (!driver->validate_ok) {
qp_dprintf("qp_lvgl_attach: fail (validation_ok == false)\n");
qp_lvgl_detach();
return false;
}
// Setting up the tasks
lvgl_state_t *lv_tick_inc_state = &lvgl_states[0];
lv_tick_inc_state->fnc_id = 0;
lv_tick_inc_state->delay_ms = 1;
lv_tick_inc_state->defer_token = defer_exec_advanced(lvgl_executors, 2, 1, tick_task_callback, lv_tick_inc_state);
if (lv_tick_inc_state->defer_token == INVALID_DEFERRED_TOKEN) {
qp_dprintf("qp_lvgl_attach: fail (could not set up qp_lvgl executor)\n");
qp_lvgl_detach();
return false;
}
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);
if (lv_task_handler_state->defer_token == INVALID_DEFERRED_TOKEN) {
qp_dprintf("qp_lvgl_attach: fail (could not set up qp_lvgl executor)\n");
qp_lvgl_detach();
return false;
}
// Init LVGL
lv_init();
// Set up lvgl display buffer
static lv_disp_draw_buf_t draw_buf;
// Allocate a buffer for 1/10 screen size
const size_t count_required = driver->panel_width * driver->panel_height / 10;
color_buffer = color_buffer ? realloc(color_buffer, sizeof(lv_color_t) * count_required) : malloc(sizeof(lv_color_t) * count_required);
if (!color_buffer) {
qp_dprintf("qp_lvgl_attach: fail (could not set up memory buffer)\n");
qp_lvgl_detach();
return false;
}
memset(color_buffer, 0, sizeof(lv_color_t) * count_required);
// Initialize the display buffer.
lv_disp_draw_buf_init(&draw_buf, color_buffer, NULL, count_required);
selected_display = device;
uint16_t panel_width, panel_height, offset_x, offset_y;
qp_get_geometry(selected_display, &panel_width, &panel_height, NULL, &offset_x, &offset_y);
panel_width -= offset_x;
panel_height -= offset_y;
// Setting up display driver
static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
lv_disp_drv_init(&disp_drv); /*Basic initialization*/
disp_drv.flush_cb = qp_lvgl_flush; /*Set your driver function*/
disp_drv.draw_buf = &draw_buf; /*Assign the buffer to the display*/
disp_drv.hor_res = panel_width; /*Set the horizontal resolution of the display*/
disp_drv.ver_res = panel_height; /*Set the vertical resolution of the display*/
lv_disp_drv_register(&disp_drv); /*Finally register the driver*/
return true;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Quantum Painter LVGL Integration API: qp_lvgl_detach
void qp_lvgl_detach(void) {
for (int i = 0; i < 2; ++i) {
cancel_deferred_exec_advanced(lvgl_executors, 2, lvgl_states[i].defer_token);
}
if (color_buffer) {
free(color_buffer);
color_buffer = NULL;
}
selected_display = NULL;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Quantum Painter LVGL Integration Internal: qp_lvgl_internal_tick
void qp_lvgl_internal_tick(void) {
static uint32_t last_lvgl_exec = 0;
deferred_exec_advanced_task(lvgl_executors, 2, &last_lvgl_exec);
}
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