145 lines
3.7 KiB
C
145 lines
3.7 KiB
C
#include <stdio.h>
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#include "sdkconfig.h"
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/* FreeRTOS */
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#include "freertos/task.h"
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/* IDF drivers */
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#include "esp_sleep.h"
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#include "esp_spi_flash.h"
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#include "esp_system.h"
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#include "esp_log.h"
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/* EPD driver */
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#include "epd_driver.h"
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#include "epd_highlevel.h"
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/* LVGL */
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#include "lvgl.h"
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/* Private */
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#include "app_lvgl.h"
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#define LVGL_TASK_HEAP 4096
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#define LVGL_TASK_INTERVAL 100
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#define APP_LOG_TAG "APP_LVGL"
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static EpdiyHighlevelState s_epd_hl;
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static int s_temp = 26;
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static lv_disp_draw_buf_t s_disp_buf;
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static lv_color_t *s_screen_buf;
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static lv_disp_drv_t s_disp_drv;
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static SemaphoreHandle_t s_lvgl_semphr;
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static void app_lvgl_task(void *pvParameters);
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static void app_lvgl_flush_cb(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p);
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static void app_lvgl_set_px_cb(lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
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lv_color_t color, lv_opa_t opa);
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int app_lvgl_init(void) {
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/* Initialize EPDIY */
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epd_init(EPD_OPTIONS_DEFAULT);
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s_epd_hl = epd_hl_init(EPD_BUILTIN_WAVEFORM);
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s_screen_buf = (lv_color_t *)epd_hl_get_framebuffer(&s_epd_hl);
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epd_poweron();
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epd_fullclear(&s_epd_hl, s_temp);
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epd_poweroff();
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/* Initialize LVGL */
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lv_init();
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lv_disp_draw_buf_init(&s_disp_buf, s_screen_buf, NULL, 960 * 540);
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lv_disp_drv_init(&s_disp_drv);
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s_disp_drv.user_data = &s_epd_hl;
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s_disp_drv.draw_buf = &s_disp_buf;
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s_disp_drv.hor_res = 960;
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s_disp_drv.ver_res = 540;
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s_disp_drv.flush_cb = app_lvgl_flush_cb;
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s_disp_drv.set_px_cb = app_lvgl_set_px_cb;
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lv_disp_drv_register(&s_disp_drv);
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s_lvgl_semphr = xSemaphoreCreateMutex();
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if (s_lvgl_semphr == NULL) {
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ESP_LOGE(APP_LOG_TAG, "Failed to create LVGL semaphore.");
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return -1;
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}
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if (xTaskCreate(app_lvgl_task, "LV_TASK", LVGL_TASK_HEAP, NULL, 2, NULL) != pdPASS) {
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ESP_LOGE(APP_LOG_TAG, "Failed to create LVGL task, available heap: %d.", esp_get_free_heap_size());
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return -2;
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}
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ESP_LOGI(APP_LOG_TAG, "LVGL initialized.");
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return 0;
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}
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int app_lvgl_lock(uint32_t ms) {
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if(xSemaphoreTake(s_lvgl_semphr, pdMS_TO_TICKS(ms)) != pdPASS) {
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return -1;
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}
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return 0;
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}
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int app_lvgl_unlock(void) {
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if(xSemaphoreGive(s_lvgl_semphr) != pdPASS) {
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return -1;
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}
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return 0;
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}
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static void app_lvgl_task(void *pvParameters) {
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for (;;) {
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if(app_lvgl_lock(50) == 0) {
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lv_timer_handler();
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ESP_LOGD(APP_LOG_TAG, "LVGL timer handler executed.");
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app_lvgl_unlock();
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}
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vTaskDelay(pdMS_TO_TICKS(LVGL_TASK_INTERVAL));
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}
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}
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static void app_lvgl_flush_cb(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p) {
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EpdiyHighlevelState *hl = disp_drv->user_data;
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EpdRect rect = {
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.x = area->x1,
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.y = area->y1,
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.width = area->x2 - area->x1 + 1,
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.height = area->y2 - area->y1 + 1,
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};
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ESP_LOGI(APP_LOG_TAG, "Flush called.");
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epd_poweron();
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epd_hl_update_area(hl, MODE_GC16, s_temp, rect);
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epd_poweroff();
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lv_disp_flush_ready(disp_drv);
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}
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static void app_lvgl_set_px_cb(lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
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lv_color_t color, lv_opa_t opa) {
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uint32_t px_offset = (buf_w * y / 2) + x / 2;
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uint8_t pix_y = lv_color_brightness(color);
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pix_y = (pix_y / 16) & 0x0FU;
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if (x % 2 == 0) {
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buf[px_offset] &= 0xF0;
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buf[px_offset] |= pix_y;
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} else {
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buf[px_offset] &= 0x0F;
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buf[px_offset] |= pix_y << 4;
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}
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} |