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175 lines
6.7 KiB
C
175 lines
6.7 KiB
C
/*
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* SPDX-FileCopyrightText: 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_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_heap_caps.h"
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#include "driver/spi_master.h"
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#include "driver/gpio.h"
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#include "pretty_effect.h"
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// Using SPI2 in the example, as it aslo supports octal modes on some targets
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#define LCD_HOST SPI2_HOST
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// To speed up transfers, every SPI transfer sends a bunch of lines. This define specifies how many.
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// More means more memory use, but less overhead for setting up / finishing transfers. Make sure 240
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// is dividable by this.
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#define PARALLEL_LINES 16
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// The number of frames to show before rotate the graph
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#define ROTATE_FRAME 30
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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 (10 * 1000 * 1000)
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#define EXAMPLE_LCD_BK_LIGHT_ON_LEVEL 0
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#define EXAMPLE_LCD_BK_LIGHT_OFF_LEVEL !EXAMPLE_LCD_BK_LIGHT_ON_LEVEL
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#define EXAMPLE_PIN_NUM_DATA0 23 /*!< for 1-line SPI, this also refered as MOSI */
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#define EXAMPLE_PIN_NUM_PCLK 19
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#define EXAMPLE_PIN_NUM_CS 22
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#define EXAMPLE_PIN_NUM_DC 21
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#define EXAMPLE_PIN_NUM_RST 18
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#define EXAMPLE_PIN_NUM_BK_LIGHT 5
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// The pixel number in horizontal and vertical
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#define EXAMPLE_LCD_H_RES 320
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#define EXAMPLE_LCD_V_RES 240
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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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#if CONFIG_EXAMPLE_LCD_SPI_8_LINE_MODE
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#define EXAMPLE_PIN_NUM_DATA1 7
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#define EXAMPLE_PIN_NUM_DATA2 8
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#define EXAMPLE_PIN_NUM_DATA3 9
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#define EXAMPLE_PIN_NUM_DATA4 10
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#define EXAMPLE_PIN_NUM_DATA5 11
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#define EXAMPLE_PIN_NUM_DATA6 12
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#define EXAMPLE_PIN_NUM_DATA7 13
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#endif // CONFIG_EXAMPLE_LCD_SPI_8_LINE_MODE
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// Simple routine to generate some patterns and send them to the LCD. Because the
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// SPI driver handles transactions in the background, we can calculate the next line
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// while the previous one is being sent.
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static uint16_t *s_lines[2];
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static void display_pretty_colors(esp_lcd_panel_handle_t panel_handle)
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{
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int frame = 0;
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// Indexes of the line currently being sent to the LCD and the line we're calculating
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int sending_line = 0;
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int calc_line = 0;
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// After ROTATE_FRAME frames, the image will be rotated
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while (frame <= ROTATE_FRAME) {
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frame++;
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for (int y = 0; y < EXAMPLE_LCD_V_RES; y += PARALLEL_LINES) {
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// Calculate a line
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pretty_effect_calc_lines(s_lines[calc_line], y, frame, PARALLEL_LINES);
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sending_line = calc_line;
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calc_line = !calc_line;
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// Send the calculated data
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esp_lcd_panel_draw_bitmap(panel_handle, 0, y, 0 + EXAMPLE_LCD_H_RES, y + PARALLEL_LINES, s_lines[sending_line]);
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}
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}
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}
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void app_main(void)
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{
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gpio_config_t bk_gpio_config = {
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.mode = GPIO_MODE_OUTPUT,
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.pin_bit_mask = 1ULL << EXAMPLE_PIN_NUM_BK_LIGHT
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};
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// Initialize the GPIO of backlight
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ESP_ERROR_CHECK(gpio_config(&bk_gpio_config));
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spi_bus_config_t buscfg = {
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.sclk_io_num = EXAMPLE_PIN_NUM_PCLK,
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.mosi_io_num = EXAMPLE_PIN_NUM_DATA0,
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.miso_io_num = -1,
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.quadwp_io_num = -1,
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.quadhd_io_num = -1,
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.max_transfer_sz = PARALLEL_LINES * EXAMPLE_LCD_H_RES * 2 + 8
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};
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#if CONFIG_EXAMPLE_LCD_SPI_8_LINE_MODE
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buscfg.data1_io_num = EXAMPLE_PIN_NUM_DATA1;
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buscfg.data2_io_num = EXAMPLE_PIN_NUM_DATA2;
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buscfg.data3_io_num = EXAMPLE_PIN_NUM_DATA3;
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buscfg.data4_io_num = EXAMPLE_PIN_NUM_DATA4;
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buscfg.data5_io_num = EXAMPLE_PIN_NUM_DATA5;
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buscfg.data6_io_num = EXAMPLE_PIN_NUM_DATA6;
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buscfg.data7_io_num = EXAMPLE_PIN_NUM_DATA7;
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buscfg.flags = SPICOMMON_BUSFLAG_OCTAL;
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#endif
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// Initialize the SPI bus
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ESP_ERROR_CHECK(spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO));
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esp_lcd_panel_io_handle_t io_handle = NULL;
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esp_lcd_panel_io_spi_config_t io_config = {
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.dc_gpio_num = EXAMPLE_PIN_NUM_DC,
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.cs_gpio_num = EXAMPLE_PIN_NUM_CS,
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.pclk_hz = EXAMPLE_LCD_PIXEL_CLOCK_HZ,
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.lcd_cmd_bits = EXAMPLE_LCD_CMD_BITS,
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.lcd_param_bits = EXAMPLE_LCD_PARAM_BITS,
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.spi_mode = 0,
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.trans_queue_depth = 10,
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};
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#if CONFIG_EXAMPLE_LCD_SPI_8_LINE_MODE
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io_config.spi_mode = 3; // using mode 3 to simulate Intel 8080 timing
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io_config.flags.octal_mode = 1;
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#endif
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// Attach the LCD to the SPI bus
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ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)LCD_HOST, &io_config, &io_handle));
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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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.reset_gpio_num = EXAMPLE_PIN_NUM_RST,
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.color_space = ESP_LCD_COLOR_SPACE_BGR,
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.bits_per_pixel = 16,
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};
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// Initialize the LCD configuration
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ESP_ERROR_CHECK(esp_lcd_new_panel_st7789(io_handle, &panel_config, &panel_handle));
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// Turn off backlight to avoid unpredictable display on the LCD screen while initializing
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// the LCD panel driver. (Different LCD screens may need different levels)
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ESP_ERROR_CHECK(gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_OFF_LEVEL));
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// Reset the display
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ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));
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// Initialize LCD panel
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ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));
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// Swap x and y axis (Different LCD screens may need different options)
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ESP_ERROR_CHECK(esp_lcd_panel_swap_xy(panel_handle, true));
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// Turn on backlight (Different LCD screens may need different levels)
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ESP_ERROR_CHECK(gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL));
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// Initialize the effect displayed
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ESP_ERROR_CHECK(pretty_effect_init());
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// "Rotate or not" flag
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bool is_rotated = false;
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// Allocate memory for the pixel buffers
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for (int i = 0; i < 2; i++) {
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s_lines[i] = heap_caps_malloc(EXAMPLE_LCD_H_RES * PARALLEL_LINES * sizeof(uint16_t), MALLOC_CAP_DMA);
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assert(s_lines[i] != NULL);
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}
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// Start and rotate
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while (1) {
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// Set driver configuration to rotate 180 degrees each time
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ESP_ERROR_CHECK(esp_lcd_panel_mirror(panel_handle, is_rotated, is_rotated));
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// Display
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display_pretty_colors(panel_handle);
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is_rotated = !is_rotated;
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}
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}
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