kopia lustrzana https://github.com/espressif/esp-idf
170 wiersze
6.4 KiB
C
170 wiersze
6.4 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: CC0-1.0
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*/
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#include <stdio.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_timer.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 "driver/i2c.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "lvgl.h"
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static const char *TAG = "example";
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#define I2C_HOST 0
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//////////////////// Please update the following configuration according to your LCD spec //////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#define EXAMPLE_LCD_PIXEL_CLOCK_HZ (400 * 1000)
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#define EXAMPLE_PIN_NUM_SDA 3
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#define EXAMPLE_PIN_NUM_SCL 4
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#define EXAMPLE_PIN_NUM_RST -1
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#define EXAMPLE_I2C_HW_ADDR 0x3C
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// The pixel number in horizontal and vertical
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#define EXAMPLE_LCD_H_RES 128
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#define EXAMPLE_LCD_V_RES 64
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// Bit number used to represent command and parameter
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#define EXAMPLE_LCD_CMD_BITS 8
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#define EXAMPLE_LCD_PARAM_BITS 8
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#define EXAMPLE_LVGL_TICK_PERIOD_MS 2
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extern void example_lvgl_demo_ui(lv_disp_t *disp);
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static bool example_notify_lvgl_flush_ready(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_io_event_data_t *edata, void *user_ctx)
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{
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lv_disp_drv_t *disp_driver = (lv_disp_drv_t *)user_ctx;
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lv_disp_flush_ready(disp_driver);
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return false;
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}
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static void example_lvgl_flush_cb(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map)
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{
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esp_lcd_panel_handle_t panel_handle = (esp_lcd_panel_handle_t) drv->user_data;
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int offsetx1 = area->x1;
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int offsetx2 = area->x2;
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int offsety1 = area->y1;
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int offsety2 = area->y2;
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// copy a buffer's content to a specific area of the display
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esp_lcd_panel_draw_bitmap(panel_handle, offsetx1, offsety1, offsetx2 + 1, offsety2 + 1, color_map);
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}
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static void example_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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{
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uint16_t byte_index = x + (( y >> 3 ) * buf_w);
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uint8_t bit_index = y & 0x7;
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if ((color.full == 0) && (LV_OPA_TRANSP != opa)) {
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buf[byte_index] |= (1 << bit_index);
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} else {
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buf[byte_index] &= ~(1 << bit_index);
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}
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}
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static void example_lvgl_rounder(lv_disp_drv_t *disp_drv, lv_area_t *area)
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{
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area->y1 = area->y1 & (~0x7);
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area->y2 = area->y2 | 0x7;
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}
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static void example_increase_lvgl_tick(void *arg)
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{
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/* Tell LVGL how many milliseconds has elapsed */
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lv_tick_inc(EXAMPLE_LVGL_TICK_PERIOD_MS);
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}
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void app_main(void)
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{
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static lv_disp_draw_buf_t disp_buf; // contains internal graphic buffer(s) called draw buffer(s)
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static lv_disp_drv_t disp_drv; // contains callback functions
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ESP_LOGI(TAG, "Initialize I2C bus");
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i2c_config_t i2c_conf = {
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.mode = I2C_MODE_MASTER,
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.sda_io_num = EXAMPLE_PIN_NUM_SDA,
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.scl_io_num = EXAMPLE_PIN_NUM_SCL,
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.sda_pullup_en = GPIO_PULLUP_ENABLE,
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.scl_pullup_en = GPIO_PULLUP_ENABLE,
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.master.clk_speed = EXAMPLE_LCD_PIXEL_CLOCK_HZ,
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};
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ESP_ERROR_CHECK(i2c_param_config(I2C_HOST, &i2c_conf));
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ESP_ERROR_CHECK(i2c_driver_install(I2C_HOST, I2C_MODE_MASTER, 0, 0, 0));
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ESP_LOGI(TAG, "Install panel IO");
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esp_lcd_panel_io_handle_t io_handle = NULL;
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esp_lcd_panel_io_i2c_config_t io_config = {
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.dev_addr = EXAMPLE_I2C_HW_ADDR,
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.control_phase_bytes = 1, // According to SSD1306 datasheet
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.dc_bit_offset = 6, // According to SSD1306 datasheet
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.lcd_cmd_bits = EXAMPLE_LCD_CMD_BITS, // According to SSD1306 datasheet
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.lcd_param_bits = EXAMPLE_LCD_CMD_BITS, // According to SSD1306 datasheet
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.on_color_trans_done = example_notify_lvgl_flush_ready,
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.user_ctx = &disp_drv,
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};
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ESP_ERROR_CHECK(esp_lcd_new_panel_io_i2c((esp_lcd_i2c_bus_handle_t)I2C_HOST, &io_config, &io_handle));
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ESP_LOGI(TAG, "Install SSD1306 panel driver");
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esp_lcd_panel_handle_t panel_handle = NULL;
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esp_lcd_panel_dev_config_t panel_config = {
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.bits_per_pixel = 1,
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.reset_gpio_num = EXAMPLE_PIN_NUM_RST,
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};
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ESP_ERROR_CHECK(esp_lcd_new_panel_ssd1306(io_handle, &panel_config, &panel_handle));
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ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));
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ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));
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ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true));
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ESP_LOGI(TAG, "Initialize LVGL library");
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lv_init();
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// alloc draw buffers used by LVGL
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// it's recommended to choose the size of the draw buffer(s) to be at least 1/10 screen sized
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lv_color_t *buf1 = malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t));
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assert(buf1);
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lv_color_t *buf2 = malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t));
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assert(buf2);
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// initialize LVGL draw buffers
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lv_disp_draw_buf_init(&disp_buf, buf1, buf2, EXAMPLE_LCD_H_RES * 20);
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ESP_LOGI(TAG, "Register display driver to LVGL");
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lv_disp_drv_init(&disp_drv);
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disp_drv.hor_res = EXAMPLE_LCD_H_RES;
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disp_drv.ver_res = EXAMPLE_LCD_V_RES;
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disp_drv.flush_cb = example_lvgl_flush_cb;
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disp_drv.draw_buf = &disp_buf;
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disp_drv.user_data = panel_handle;
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disp_drv.rounder_cb = example_lvgl_rounder;
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disp_drv.set_px_cb = example_lvgl_set_px_cb;
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lv_disp_t *disp = lv_disp_drv_register(&disp_drv);
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ESP_LOGI(TAG, "Install LVGL tick timer");
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// Tick interface for LVGL (using esp_timer to generate 2ms periodic event)
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const esp_timer_create_args_t lvgl_tick_timer_args = {
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.callback = &example_increase_lvgl_tick,
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.name = "lvgl_tick"
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};
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esp_timer_handle_t lvgl_tick_timer = NULL;
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ESP_ERROR_CHECK(esp_timer_create(&lvgl_tick_timer_args, &lvgl_tick_timer));
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ESP_ERROR_CHECK(esp_timer_start_periodic(lvgl_tick_timer, EXAMPLE_LVGL_TICK_PERIOD_MS * 1000));
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ESP_LOGI(TAG, "Display LVGL Scroll Text");
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example_lvgl_demo_ui(disp);
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while (1) {
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// raise the task priority of LVGL and/or reduce the handler period can improve the performance
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vTaskDelay(pdMS_TO_TICKS(10));
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// The task running lv_timer_handler should have lower priority than that running `lv_tick_inc`
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lv_timer_handler();
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}
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}
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