214 lines
7.4 KiB
C
214 lines
7.4 KiB
C
#include <stdio.h>
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#include <string.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 "hub75.h"
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#include "esp_lcd_panel_ops.h"
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#include "driver/gpio.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "esp_rom_sys.h"
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static const char *TAG = "led matrix";
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#define HUB75_CLOCK_HZ (10 * 1000 * 1000)
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#define HUB75_COL_COUNT (64)
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#define HUB75_ROW_COUNT (32)
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#define HUB75_COL_UNIT_COUNT (32) /* 实际扫描的时候送入数据的列数 */
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#define HUB75_SCAN_LINE_CNT (16) /* 多少扫的 */
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#define HUB75_LINE_ADDR_A_PIN_NUM 33
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#define HUB75_LINE_ADDR_B_PIN_NUM 34
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#define HUB75_LINE_ADDR_C_PIN_NUM 35
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#define HUB75_LINE_ADDR_D_PIN_NUM 36
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#define HUB75_LAT_PIN_NUM 8
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#define HUB75_OE_PIN_NUM 21
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#define HUB75_CLK_PIN_NUM 7
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#define HUB75_R0 1
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#define HUB75_G0 2
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#define HUB75_B0 3
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#define HUB75_R1 4
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#define HUB75_G1 5
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#define HUB75_B1 6
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#define HUB75_R2 37
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#define HUB75_G2 38
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#define HUB75_B2 39
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#define HUB75_R3 40
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#define HUB75_G3 41
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#define HUB75_B3 42
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//#define LVGL_TICK_PERIOD_MS 2
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#define LINE_SCAN_LOOP_PERIOD_MS 1000 /* 暂时测试用 */
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#define LINE_SCAN_CNT 8 /* 用于全彩显示，RGB323色彩，最宽3bit取值0-7，需要扫描8次进行灰度调节 */
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#define PSRAM_DATA_ALIGNMENT 64
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#define get_rgb_one_value(n, x) (n < (x) ? 1 : 0) /* 判断r、g、b其中一个本次是否应该点亮 */
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/* 输入一个byte，从高到低：r 3bit, g 2bit, b 3bit */
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/* 输出一个3bit值，从高到低：b, g, r */
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#define get_rgb_value(n, x) (get_rgb_one_value(n, (x >> 5) & 0x07) | (get_rgb_one_value(n, (x >> 3) & 0x03) << 1) | (get_rgb_one_value(n, x & 0x07) << 2))
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typedef unsigned char uint8_t;
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typedef unsigned short int uint16_t;
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uint8_t ledbuf[HUB75_ROW_COUNT][HUB75_COL_COUNT];
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static int line = 0; /* 本次扫描行，32行16扫，一次显示两行 */
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void get_one_line(int *line_ret, uint16_t *line_data)
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{
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int i;
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static int line_scan_cnt = 0; /* 本行已经扫描多少次，8次 */
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/* 准备一行数据 */
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for (i = 0; i < HUB75_COL_UNIT_COUNT; i++)
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{
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/* 后面的注释为bit从低到高，对应i80总线的数据线 */
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line_data[i] = get_rgb_value(line_scan_cnt, ledbuf[line][i]) | /* r0, g0, b0 */
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(get_rgb_value(line_scan_cnt, ledbuf[line + HUB75_SCAN_LINE_CNT][i]) << 3) | /* r1, g1, b1 */
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(get_rgb_value(line_scan_cnt, ledbuf[line][i + HUB75_COL_UNIT_COUNT]) << 6) | /* r2, g2, b2 */
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(get_rgb_value(line_scan_cnt, ledbuf[line + HUB75_SCAN_LINE_CNT][i + HUB75_COL_UNIT_COUNT]) << 9); /* r3, g3, b3 */
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}
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*line_ret = line;
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/* 更新索引 */
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line_scan_cnt++;
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if (line_scan_cnt >= HUB75_SCAN_LINE_CNT)
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line ++;
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if (line >= HUB75_SCAN_LINE_CNT)
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{
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line = 0;
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line_scan_cnt = 0;
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}
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}
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static void line_scan_loop_cb(void *args)
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{
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int line;
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uint16_t line_data[HUB75_COL_UNIT_COUNT];
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esp_lcd_panel_io_handle_t io_handle = (esp_lcd_panel_io_handle_t)args;
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get_one_line(&line, line_data);
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esp_lcd_panel_io_tx_color(io_handle, -1, line_data, sizeof(line_data)); /* 发送行数据 */
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}
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static bool line_trans_done_cb(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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gpio_set_level(HUB75_OE_PIN_NUM, 1); /* 失能显示 */
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gpio_set_level(HUB75_LINE_ADDR_A_PIN_NUM, line & 1); /* 行地址，A是低位（待求证） */
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gpio_set_level(HUB75_LINE_ADDR_B_PIN_NUM, (line >> 1) & 1);
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gpio_set_level(HUB75_LINE_ADDR_C_PIN_NUM, (line >> 2) & 1);
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gpio_set_level(HUB75_LINE_ADDR_D_PIN_NUM, (line >> 3) & 1);
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gpio_set_level(HUB75_LAT_PIN_NUM, 1); /* 锁存拉高 */
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gpio_set_level(HUB75_LAT_PIN_NUM, 0); /* 拉低锁存，下降沿锁存 */
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gpio_set_level(HUB75_LAT_PIN_NUM, 1);
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gpio_set_level(HUB75_OE_PIN_NUM, 0); /* 使能显示 */
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ESP_LOGI(TAG, "line trans done");
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return false;
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}
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void app_main(void)
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{
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/* 8080总线配置 */
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ESP_LOGI(TAG, "Initialize Intel 8080 bus");
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esp_lcd_i80_bus_handle_t i80_bus = NULL;
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esp_lcd_i80_bus_config_t bus_config = {
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.clk_src = HUB75_CLK_PIN_NUM,
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.dc_gpio_num = -1,
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.wr_gpio_num = HUB75_CLK_PIN_NUM,
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.data_gpio_nums = {
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HUB75_R0,
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HUB75_G0,
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HUB75_B0,
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HUB75_R1,
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HUB75_G1,
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HUB75_B1,
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HUB75_R2,
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HUB75_G2,
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HUB75_B2,
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HUB75_R3,
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HUB75_G3,
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HUB75_B3,
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-1,
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-1,
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-1,
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-1,
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},
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.bus_width = 16,
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.max_transfer_bytes = HUB75_COL_COUNT * sizeof(uint16_t), /* 每次发一行 */
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.psram_trans_align = PSRAM_DATA_ALIGNMENT,
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.sram_trans_align = 4,
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};
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ESP_ERROR_CHECK(esp_lcd_new_i80_bus(&bus_config, &i80_bus));
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/* 8080IO设备申请 */
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esp_lcd_panel_io_handle_t io_handle = NULL;
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esp_lcd_panel_io_i80_config_t io_config = {
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.cs_gpio_num = -1,
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.pclk_hz = HUB75_CLOCK_HZ,
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.trans_queue_depth = 10,
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// .dc_levels = {
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// .dc_idle_level = 0,
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// .dc_cmd_level = 0,
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// .dc_dummy_level = 0,
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// .dc_data_level = 1,
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// },
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// .flags = {
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// .swap_color_bytes = !LV_COLOR_16_SWAP, // Swap can be done in LvGL (default) or DMA
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// },
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.on_color_trans_done = line_trans_done_cb,
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.user_ctx = NULL,
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.lcd_cmd_bits = 0,
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.lcd_param_bits = 0,
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};
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ESP_ERROR_CHECK(esp_lcd_new_panel_io_i80(i80_bus, &io_config, &io_handle));
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/* hub75特定类型申请 */
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esp_lcd_panel_handle_t panel_handle = NULL;
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ESP_LOGI(TAG, "Install LCD driver of hub75");
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hub75_panel_config_t panel_config = {
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.line_addr_num = 4,
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.line_addr_gpio_num = {HUB75_LINE_ADDR_A_PIN_NUM, HUB75_LINE_ADDR_B_PIN_NUM, HUB75_LINE_ADDR_C_PIN_NUM, HUB75_LINE_ADDR_D_PIN_NUM},
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.lat_gpio_num = HUB75_LAT_PIN_NUM,
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.oe_gpio_num = HUB75_OE_PIN_NUM,
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};
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ESP_ERROR_CHECK(esp_lcd_new_panel_hub75(io_handle, &panel_config, &panel_handle));
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/* 定时进行行扫描 */
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ESP_LOGI(TAG, "Create a timer to do line scan");
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const esp_timer_create_args_t periodic_timer_args = {
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.callback = line_scan_loop_cb,
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.arg = io_handle,
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.name = "line_scan_loop"
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};
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esp_timer_handle_t line_scan_loop_timer = NULL;
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ESP_ERROR_CHECK(esp_timer_create(&periodic_timer_args, &line_scan_loop_timer));
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ESP_ERROR_CHECK(esp_timer_start_periodic(line_scan_loop_timer, LINE_SCAN_LOOP_PERIOD_MS * 1000));
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// /* 测试，发送一次数据 */
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// ESP_LOGI(TAG, "Test send data to LCD");
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// uint16_t color_data[HUB75_COL_COUNT] = {1, 2, 4};
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// gpio_set_level(HUB75_OE_PIN_NUM, 1);
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// gpio_set_level(HUB75_LINE_ADDR_A_PIN_NUM, 0);
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// gpio_set_level(HUB75_LINE_ADDR_B_PIN_NUM, 0);
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// gpio_set_level(HUB75_LINE_ADDR_C_PIN_NUM, 0);
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// gpio_set_level(HUB75_LINE_ADDR_D_PIN_NUM, 0);
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// gpio_set_level(HUB75_LAT_PIN_NUM, 1);
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// esp_lcd_panel_io_tx_color(io_handle, -1, color_data, sizeof(color_data));
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while (1) {
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vTaskDelay(pdMS_TO_TICKS(10));
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}
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}
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