#include "custom_lcd_display.h"
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#include <esp_lcd_panel_io.h>
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#include <esp_log.h>
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#include <freertos/FreeRTOS.h>
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#include <stdio.h>
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#include <vector>
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#include "board.h"
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#include "config.h"
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#include "esp_lvgl_port.h"
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#include "settings.h"
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#define TAG "CustomEpdDisplay"
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#define BYTES_PER_PIXEL (LV_COLOR_FORMAT_GET_SIZE(LV_COLOR_FORMAT_RGB565))
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#define BUFF_SIZE (EXAMPLE_LCD_WIDTH * EXAMPLE_LCD_HEIGHT * BYTES_PER_PIXEL)
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void CustomEpdDisplay::lvgl_flush_cb(lv_display_t* disp, const lv_area_t* area, uint8_t* color_p) {
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assert(disp != NULL);
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CustomEpdDisplay* driver = (CustomEpdDisplay*)lv_display_get_user_data(disp);
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uint16_t* buffer = (uint16_t*)color_p;
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driver->EPD_Clear();
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for (int y = area->y1; y <= area->y2; y++) {
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for (int x = area->x1; x <= area->x2; x++) {
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uint8_t color = (*buffer < 0x7fff) ? DRIVER_COLOR_BLACK : DRIVER_COLOR_WHITE;
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driver->EPD_DrawColorPixel(x, y, color);
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buffer++;
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}
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}
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driver->EPD_DisplayPart();
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lv_disp_flush_ready(disp);
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}
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CustomEpdDisplay::CustomEpdDisplay(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_t panel,
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int width, int height, int offset_x, int offset_y, bool mirror_x,
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bool mirror_y, bool swap_xy, custom_epd_spi_t _epd_spi_data)
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: LcdDisplay(panel_io, panel, width, height),
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epd_spi_data(_epd_spi_data),
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Width(width),
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Height(height) {
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ESP_LOGI(TAG, "Initialize SPI");
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spi_port_init();
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spi_gpio_init();
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ESP_LOGI(TAG, "Initialize LVGL library");
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lv_init();
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lvgl_port_cfg_t port_cfg = ESP_LVGL_PORT_INIT_CONFIG();
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port_cfg.task_priority = 2;
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port_cfg.timer_period_ms = 50;
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lvgl_port_init(&port_cfg);
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lvgl_port_lock(0);
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buffer = (uint8_t*)heap_caps_malloc(epd_spi_data.buffer_len, MALLOC_CAP_SPIRAM);
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assert(buffer);
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display_ = lv_display_create(width, height); /* 以水平和垂直分辨率（像素）进行基本初始化 */
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lv_display_set_flush_cb(display_, lvgl_flush_cb);
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lv_display_set_user_data(display_, this);
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uint8_t* buffer_1 = NULL;
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buffer_1 = (uint8_t*)heap_caps_malloc(BUFF_SIZE, MALLOC_CAP_SPIRAM);
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assert(buffer_1);
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lv_display_set_buffers(display_, buffer_1, NULL, BUFF_SIZE, LV_DISPLAY_RENDER_MODE_FULL);
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ESP_LOGI(TAG, "EPD init");
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EPD_Init();
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ESP_LOGI(TAG, "EPD Clear");
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EPD_Clear();
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EPD_Display();
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lvgl_port_unlock();
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if (display_ == nullptr) {
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ESP_LOGE(TAG, "Failed to add display");
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return;
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}
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ESP_LOGI(TAG, "ui start");
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SetupUI();
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}
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CustomEpdDisplay::~CustomEpdDisplay() {}
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void CustomEpdDisplay::spi_gpio_init() {
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int rst = epd_spi_data.rst;
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int cs = epd_spi_data.cs;
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int dc = epd_spi_data.dc;
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int busy = epd_spi_data.busy;
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gpio_config_t gpio_conf = {};
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gpio_conf.intr_type = GPIO_INTR_DISABLE;
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gpio_conf.mode = GPIO_MODE_OUTPUT;
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gpio_conf.pin_bit_mask = (0x1ULL << rst) | (0x1ULL << dc) | (0x1ULL << cs);
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gpio_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
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gpio_conf.pull_up_en = GPIO_PULLUP_ENABLE;
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ESP_ERROR_CHECK_WITHOUT_ABORT(gpio_config(&gpio_conf));
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gpio_conf.mode = GPIO_MODE_INPUT;
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gpio_conf.pin_bit_mask = (0x1ULL << busy);
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ESP_ERROR_CHECK_WITHOUT_ABORT(gpio_config(&gpio_conf));
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set_rst_1();
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}
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void CustomEpdDisplay::spi_port_init() {
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int mosi = epd_spi_data.mosi;
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int scl = epd_spi_data.scl;
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int spi_host = epd_spi_data.spi_host;
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esp_err_t ret;
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spi_bus_config_t buscfg = {};
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buscfg.miso_io_num = -1;
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buscfg.mosi_io_num = mosi;
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buscfg.sclk_io_num = scl;
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buscfg.quadwp_io_num = -1;
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buscfg.quadhd_io_num = -1;
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buscfg.max_transfer_sz = 4096;
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spi_device_interface_config_t devcfg = {};
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devcfg.spics_io_num = -1;
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devcfg.clock_speed_hz = 20 * 1000 * 1000; // Clock out at 10 MHz
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devcfg.mode = 0; // SPI mode 0
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devcfg.queue_size = 7; // We want to be able to queue 7 transactions at a time
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ret = spi_bus_initialize((spi_host_device_t)spi_host, &buscfg, SPI_DMA_CH_AUTO);
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ESP_ERROR_CHECK(ret);
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ret = spi_bus_add_device((spi_host_device_t)spi_host, &devcfg, &spi);
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ESP_ERROR_CHECK(ret);
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}
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void CustomEpdDisplay::read_busy() {
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int busy = epd_spi_data.busy;
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while (gpio_get_level((gpio_num_t)busy) == 1) {
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vTaskDelay(pdMS_TO_TICKS(5)); // LOW: idle, HIGH: busy
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}
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}
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void CustomEpdDisplay::SPI_SendByte(uint8_t data) {
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esp_err_t ret;
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spi_transaction_t t;
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memset(&t, 0, sizeof(t));
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t.length = 8;
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t.tx_buffer = &data;
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ret = spi_device_polling_transmit(spi, &t); // Transmit!
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assert(ret == ESP_OK); // Should have had no issues.
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}
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void CustomEpdDisplay::EPD_SendData(uint8_t data) {
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set_dc_1();
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set_cs_0();
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SPI_SendByte(data);
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set_cs_1();
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}
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void CustomEpdDisplay::EPD_SendCommand(uint8_t command) {
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set_dc_0();
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set_cs_0();
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SPI_SendByte(command);
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set_cs_1();
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}
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void CustomEpdDisplay::writeBytes(uint8_t* buffer, int len) {
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set_dc_1();
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set_cs_0();
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const int MAX_SPI_TRANSFER = 4096;
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int remaining = len;
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int offset = 0;
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while (remaining > 0) {
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int chunk_size = (remaining > MAX_SPI_TRANSFER) ? MAX_SPI_TRANSFER : remaining;
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esp_err_t ret;
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spi_transaction_t t;
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memset(&t, 0, sizeof(t));
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t.length = 8 * chunk_size;
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t.tx_buffer = buffer + offset;
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ret = spi_device_polling_transmit(spi, &t); // Transmit!
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "SPI transmit failed at offset %d, chunk %d: %s", offset, chunk_size,
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esp_err_to_name(ret));
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break;
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}
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remaining -= chunk_size;
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offset += chunk_size;
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}
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set_cs_1();
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}
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void CustomEpdDisplay::writeBytes(const uint8_t* buffer, int len) {
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set_dc_1();
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set_cs_0();
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const int MAX_SPI_TRANSFER = 4096;
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int remaining = len;
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int offset = 0;
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while (remaining > 0) {
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int chunk_size = (remaining > MAX_SPI_TRANSFER) ? MAX_SPI_TRANSFER : remaining;
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esp_err_t ret;
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spi_transaction_t t;
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memset(&t, 0, sizeof(t));
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t.length = 8 * chunk_size;
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t.tx_buffer = buffer + offset;
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ret = spi_device_polling_transmit(spi, &t); // Transmit!
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "SPI transmit failed at offset %d, chunk %d: %s", offset, chunk_size,
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esp_err_to_name(ret));
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break;
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}
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remaining -= chunk_size;
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offset += chunk_size;
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}
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set_cs_1();
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}
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void CustomEpdDisplay::EPD_SetWindows(uint16_t Xstart, uint16_t Ystart, uint16_t Xend,
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uint16_t Yend) {
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EPD_SendCommand(0x44); // SET_RAM_X_ADDRESS_START_END_POSITION
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EPD_SendData((Xstart * 8) & 0xFF);
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EPD_SendData(((Xstart * 8) >> 8) & 0xFF);
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EPD_SendData((Xend * 8) & 0xFF);
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EPD_SendData(((Xend * 8) >> 8) & 0xFF);
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EPD_SendCommand(0x45); // SET_RAM_Y_ADDRESS_START_END_POSITION
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EPD_SendData(Yend & 0xFF);
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EPD_SendData((Yend >> 8) & 0xFF);
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EPD_SendData(Ystart & 0xFF);
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EPD_SendData((Ystart >> 8) & 0xFF);
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}
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void CustomEpdDisplay::EPD_SetCursor(uint16_t Xstart, uint16_t Ystart) {
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EPD_SendCommand(0x4E);
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EPD_SendData((Xstart * 8) & 0xFF);
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EPD_SendData(((Xstart * 8) >> 8) & 0xFF);
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EPD_SendCommand(0x4F);
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EPD_SendData(Ystart & 0xFF);
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EPD_SendData((Ystart >> 8) & 0xFF);
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}
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void CustomEpdDisplay::EPD_TurnOnDisplay() {
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EPD_SendCommand(0x22);
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EPD_SendData(0xF7);
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EPD_SendCommand(0x20);
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read_busy();
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}
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void CustomEpdDisplay::EPD_TurnOnDisplayPart() {
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EPD_SendCommand(0x22);
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EPD_SendData(0xFF);
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EPD_SendCommand(0x20);
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read_busy();
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}
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void CustomEpdDisplay::EPD_Init() {
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set_rst_1();
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vTaskDelay(pdMS_TO_TICKS(50));
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set_rst_0();
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vTaskDelay(pdMS_TO_TICKS(2));
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set_rst_1();
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vTaskDelay(pdMS_TO_TICKS(50));
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read_busy();
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EPD_SendCommand(0x12); // SWRESET
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read_busy();
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EPD_SendCommand(0x18);
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EPD_SendData(0x80);
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EPD_SendCommand(0x0C); // Driver output control
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EPD_SendData(0xAE);
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EPD_SendData(0xC7);
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EPD_SendData(0xC3);
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EPD_SendData(0xC0);
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EPD_SendData(0x80);
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EPD_SendCommand(0x01); // Driver output control
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EPD_SendData((Height - 1) % 256);
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EPD_SendData((Height - 1) / 256);
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EPD_SendData(0x02);
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EPD_SendCommand(0x3C); // BorderWavefrom
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EPD_SendData(0x01);
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EPD_SendCommand(0x11); // data entry mode
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EPD_SendData(0x01);
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EPD_SendCommand(0x44); // set Ram-X address start/end position
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EPD_SendData(0x00);
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EPD_SendData(0x00);
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EPD_SendData((Width - 1) % 256);
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EPD_SendData((Width - 1) / 256);
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EPD_SendCommand(0x45); // set Ram-Y address start/end position
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EPD_SendData((Height - 1) % 256);
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EPD_SendData((Height - 1) / 256);
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EPD_SendData(0x00);
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EPD_SendData(0x00);
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EPD_SendCommand(0x4E); // set RAM x address count to 0;
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EPD_SendData(0x00);
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EPD_SendData(0x00);
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EPD_SendCommand(0x4F); // set RAM y address count to 0X199;
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EPD_SendData(0x00);
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EPD_SendData(0x00);
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read_busy();
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}
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void CustomEpdDisplay::EPD_Clear() {
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int buffer_len = epd_spi_data.buffer_len;
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memset(buffer, 0xff, buffer_len);
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}
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void CustomEpdDisplay::EPD_Display() {
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int buffer_len = epd_spi_data.buffer_len;
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EPD_SendCommand(0x24);
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assert(buffer);
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writeBytes(buffer, buffer_len);
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EPD_TurnOnDisplay();
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}
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void CustomEpdDisplay::EPD_DisplayPartBaseImage() {
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int buffer_len = epd_spi_data.buffer_len;
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EPD_SendCommand(0x24);
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assert(buffer);
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writeBytes(buffer, buffer_len);
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EPD_SendCommand(0x26);
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writeBytes(buffer, buffer_len);
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EPD_TurnOnDisplay();
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}
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void CustomEpdDisplay::EPD_Init_Partial() {
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set_rst_1();
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vTaskDelay(pdMS_TO_TICKS(50));
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set_rst_0();
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vTaskDelay(pdMS_TO_TICKS(2));
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set_rst_1();
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vTaskDelay(pdMS_TO_TICKS(50));
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read_busy();
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EPD_SendCommand(0x18);
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EPD_SendData(0x80);
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EPD_SendCommand(0x3C);
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EPD_SendData(0x80);
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EPD_SetWindows(0, Width - 1, Height - 1, 0);
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EPD_SetCursor(0, Height - 1);
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read_busy();
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}
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void CustomEpdDisplay::EPD_DisplayPart() {
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EPD_SendCommand(0x24);
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assert(buffer);
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writeBytes(buffer, 48000);
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EPD_TurnOnDisplayPart();
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}
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void CustomEpdDisplay::EPD_Sleep() {
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EPD_SendCommand(0x10); // enter deep sleep
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EPD_SendData(0x01);
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vTaskDelay(pdMS_TO_TICKS(10));
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set_rst_0();
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set_cs_0();
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set_dc_0();
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}
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void CustomEpdDisplay::EPD_DrawColorPixel(uint16_t x, uint16_t y, uint8_t color) {
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if (x >= Width || y >= Height) {
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ESP_LOGE("EPD", "Out of bounds pixel: (%d,%d)", x, y);
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return;
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}
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uint16_t index = y * Width / 8 + (x >> 3);
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uint8_t bit = 7 - (x & 0x07);
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if (color == DRIVER_COLOR_WHITE) {
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buffer[index] |= (0x01 << bit);
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} else {
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buffer[index] &= ~(0x01 << bit);
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}
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}
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