Juli
89dfdf09a6
Power off drops the peripheral rail (PWR_ON low), sleeps the panel and puts the chip into deep sleep with ext1 wake armed on the encoder pins, choosing any-low or any-high from the knob's resting state so a single detent wakes it. The button (GPIO0) is not a wake source on purpose.
100 lines
3.7 KiB
C
100 lines
3.7 KiB
C
#include "display.h"
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#include "board.h"
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#include "sdkconfig.h"
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#include "driver/spi_master.h"
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#include "driver/ledc.h"
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#include "esp_lcd_panel_io.h"
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#include "esp_lcd_panel_vendor.h"
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#include "esp_lcd_panel_ops.h"
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#include "esp_lvgl_port.h"
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#include "esp_log.h"
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static const char *TAG = "display";
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#define LCD_SPI_HOST SPI2_HOST
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#define BL_TIMER LEDC_TIMER_0
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#define BL_CHANNEL LEDC_CHANNEL_0
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static esp_lcd_panel_handle_t panel;
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static void backlight_init(void)
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{
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ledc_timer_config_t timer = {
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.speed_mode = LEDC_LOW_SPEED_MODE, .duty_resolution = LEDC_TIMER_10_BIT,
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.timer_num = BL_TIMER, .freq_hz = 5000, .clk_cfg = LEDC_AUTO_CLK,
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};
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ESP_ERROR_CHECK(ledc_timer_config(&timer));
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ledc_channel_config_t ch = {
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.gpio_num = board->lcd_bl, .speed_mode = LEDC_LOW_SPEED_MODE, .channel = BL_CHANNEL,
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.timer_sel = BL_TIMER, .duty = 0, .hpoint = 0,
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};
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ESP_ERROR_CHECK(ledc_channel_config(&ch));
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}
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void display_set_backlight(uint8_t percent)
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{
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if (percent > 100) percent = 100;
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// perceptual-ish curve so 50% doesn't look like 90%
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uint32_t duty = (1023u * percent * percent) / 10000u;
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ledc_set_duty(LEDC_LOW_SPEED_MODE, BL_CHANNEL, duty);
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ledc_update_duty(LEDC_LOW_SPEED_MODE, BL_CHANNEL);
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}
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void display_init(void)
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{
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backlight_init();
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spi_bus_config_t bus = {
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.mosi_io_num = board->lcd_mosi, .miso_io_num = board->lcd_miso, .sclk_io_num = board->lcd_sclk,
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.quadwp_io_num = -1, .quadhd_io_num = -1,
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.max_transfer_sz = LCD_H_RES * 48 * sizeof(uint16_t),
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};
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ESP_ERROR_CHECK(spi_bus_initialize(LCD_SPI_HOST, &bus, SPI_DMA_CH_AUTO));
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esp_lcd_panel_io_handle_t io = NULL;
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esp_lcd_panel_io_spi_config_t io_cfg = {
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.cs_gpio_num = board->lcd_cs, .dc_gpio_num = board->lcd_dc,
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.spi_mode = 0, .pclk_hz = CONFIG_WIDGET_LCD_PCLK_MHZ * 1000 * 1000,
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.trans_queue_depth = 10, .lcd_cmd_bits = 8, .lcd_param_bits = 8,
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};
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ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)LCD_SPI_HOST, &io_cfg, &io));
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esp_lcd_panel_dev_config_t panel_cfg = {
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.reset_gpio_num = board->lcd_rst,
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.rgb_ele_order = board->lcd_bgr ? LCD_RGB_ELEMENT_ORDER_BGR : LCD_RGB_ELEMENT_ORDER_RGB,
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.bits_per_pixel = 16,
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};
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ESP_ERROR_CHECK(esp_lcd_new_panel_st7789(io, &panel_cfg, &panel));
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ESP_ERROR_CHECK(esp_lcd_panel_reset(panel));
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ESP_ERROR_CHECK(esp_lcd_panel_init(panel));
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ESP_ERROR_CHECK(esp_lcd_panel_invert_color(panel, true)); // IPS panel, TFT_INVERSION_ON
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// TFT_eSPI setRotation(3) == MADCTL MV|MY; the 170 px axis sits at RAM column 35.
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ESP_ERROR_CHECK(esp_lcd_panel_swap_xy(panel, true));
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ESP_ERROR_CHECK(esp_lcd_panel_mirror(panel, false, true));
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ESP_ERROR_CHECK(esp_lcd_panel_set_gap(panel, 0, 35));
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ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel, true));
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lvgl_port_cfg_t port_cfg = ESP_LVGL_PORT_INIT_CONFIG();
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port_cfg.task_stack = 10240;
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port_cfg.task_affinity = 1;
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ESP_ERROR_CHECK(lvgl_port_init(&port_cfg));
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lvgl_port_display_cfg_t disp_cfg = {
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.io_handle = io, .panel_handle = panel,
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.buffer_size = LCD_H_RES * 40, .double_buffer = true,
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.hres = LCD_H_RES, .vres = LCD_V_RES, .monochrome = false,
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.rotation = {.swap_xy = true, .mirror_x = false, .mirror_y = true},
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.color_format = LV_COLOR_FORMAT_RGB565,
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.flags = {.buff_dma = true, .buff_spiram = false, .swap_bytes = true},
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};
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lv_display_t *disp = lvgl_port_add_disp(&disp_cfg);
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if (!disp) { ESP_LOGE(TAG, "lvgl_port_add_disp failed"); abort(); }
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ESP_LOGI(TAG, "ST7789 %dx%d up at %d MHz", LCD_H_RES, LCD_V_RES, CONFIG_WIDGET_LCD_PCLK_MHZ);
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}
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void display_off(void)
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{
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display_set_backlight(0);
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if (panel) esp_lcd_panel_disp_on_off(panel, false);
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}
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