136 lines
4.8 KiB
C++
136 lines
4.8 KiB
C++
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#include "panel_device.h"
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#include "display.h"
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#include "scoped_lock.h"
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#include "time_keeper.h"
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// To use LV_COLOR_FORMAT_I1 we need an extra buffer to hold the converted data.
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uint8_t IPanelDevice::oled_buffer_[LCD_H_RES * LCD_V_RES / 8];
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bool IPanelDevice::lvgl_flush_ready_cb(esp_lcd_panel_io_handle_t,
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esp_lcd_panel_io_event_data_t *,
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void *user_ctx)
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{
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auto *disp = (lv_display_t *) user_ctx;
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lv_display_flush_ready(disp);
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return false;
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}
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void IPanelDevice::lvgl_flush_cb(lv_display_t *display, const lv_area_t *area,
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uint8_t *px_map) // NOLINT(*-non-const-parameter)
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{
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auto panel_handle =
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(esp_lcd_panel_handle_t) lv_display_get_user_data(display);
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// Necessary because LVGL reserves 2x4 bytes in the buffer for a palette.
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// For more information about the monochrome, please refer to:
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// https://docs.lvgl.io/9.2/porting/display.html#monochrome-displays
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// Skip the palette here.
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px_map += LVGL_PALETTE_SIZE;
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uint16_t hor_res = lv_display_get_physical_horizontal_resolution(display);
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int32_t x1 = area->x1;
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int32_t x2 = area->x2;
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int32_t y1 = area->y1;
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int32_t y2 = area->y2;
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for (int32_t y = y1; y <= y2; y++) {
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for (int32_t x = x1; x <= x2; x++) {
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/* The order of bits is MSB first.
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MSB LSB
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bits 7 6 5 4 3 2 1 0
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pixels 0 1 2 3 4 5 6 7
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Left Right
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*/
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bool chroma_color = (px_map[(hor_res >> 3) * y + (x >> 3)] &
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1 << (7 - x % 8));
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// Write to the buffer as required for the display.
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// It writes only 1-bit for monochrome displays mapped vertically.
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uint8_t *buf = IPanelDevice::oled_buffer_ + hor_res * (y >> 3) + (x);
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if (chroma_color) {
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(*buf) &= ~(1 << (y % 8));
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} else {
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(*buf) |= (1 << (y % 8));
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}
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}
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}
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// Pass the draw buffer to the driver.
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ESP_ERROR_CHECK(
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esp_lcd_panel_draw_bitmap(panel_handle, x1, y1, x2 + 1, y2 + 1,
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IPanelDevice::oled_buffer_));
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}
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void IPanelDevice::lvgl_increase_tick_cb(void *)
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{
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// Tell LVGL how many milliseconds has elapsed
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lv_tick_inc(LVGL_TICK_PERIOD_MS);
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}
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[[noreturn]] void IPanelDevice::lvgl_port_task(void *)
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{
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// Optionally initialize some LVGL objects here before entering loop below.
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ESP_LOGI(TAG, "Starting LVGL task");
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for (uint32_t time_to_next_ms = 0; true; usleep(1000 * time_to_next_ms)) {
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// Obtain LVGL API lock before calling any LVGL methods.
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ScopedLock lock;
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// Optionally handle LVGL input or event logic here.
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// Update LVGL periodic timers.
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time_to_next_ms = lv_timer_handler();
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}
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}
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void IPanelDevice::register_draw_buffer(lv_display_t *display_handle,
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esp_lcd_panel_io_handle_t io_handle)
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{
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// Create draw buffer.
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ESP_LOGI(TAG, "Allocate separate LVGL draw buffers");
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lv_buf_ = heap_caps_calloc(1, lv_buf_size_,
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MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
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assert(lv_buf_);
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ESP_LOGI(TAG, "Set LVGL draw buffers");
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// Color format must be set first, LVGL9 suooprt new monochromatic format.
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lv_display_set_color_format(display_handle, LV_COLOR_FORMAT_I1);
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lv_display_set_buffers(display_handle, lv_buf_, nullptr,
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lv_buf_size_,
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LV_DISPLAY_RENDER_MODE_FULL);
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lv_display_set_rotation(display_handle, LV_DISPLAY_ROTATION_0);
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ESP_LOGI(TAG, "Set LVGL callback for flushing to the display");
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lv_display_set_flush_cb(display_handle, IPanelDevice::lvgl_flush_cb);
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ESP_LOGI(TAG, "Register io panel callback for LVGL flush ready notification");
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const esp_lcd_panel_io_callbacks_t cbs = {
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.on_color_trans_done = IPanelDevice::lvgl_flush_ready_cb,
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};
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ESP_ERROR_CHECK(
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esp_lcd_panel_io_register_event_callbacks(io_handle, &cbs,
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display_handle));
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}
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void IPanelDevice::register_lvgl_tick_timer()
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{
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ESP_LOGI(TAG, "Use esp_timer to increase LVGL tick");
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const esp_timer_create_args_t esp_timer_args = {
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.callback = &IPanelDevice::lvgl_increase_tick_cb,
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// Data to pass to the IPanelDevice::lvgl_port_task callback.
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.arg = nullptr,
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.name = "lvgl_tick",
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};
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Display::timers_.start_new_timer_periodic(esp_timer_args,
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LVGL_TICK_PERIOD_MS * 1000);
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// LVGL requires a FreeRTOS task for running it's event loop.
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// The lvgl_port_task callback can update the UI or handle input logic.
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// For this basic example we don't do either of these things.
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ESP_LOGI(TAG, "Create LVGL FreeRTOS task");
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// Optionally set user data to pass to LVGL's FreeRTOS task callback here.
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void *user_data = nullptr;
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xTaskCreate(lvgl_port_task, "LVGL", LVGL_TASK_STACK_SIZE,
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user_data, LVGL_TASK_PRIORITY, nullptr);
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}
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