#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_timer.h"
#include "esp_lcd_panel_io_i80_hub75.h"
#include "esp_lcd_panel_ops.h"
#include "driver/gpio.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_rom_sys.h"

static const char *TAG = "led matrix";

#define HUB75_CLOCK_HZ     (10 * 1000 * 1000)
#define HUB75_MAX_SCAN_TIMES   (8)     /* 扫描次数是8次，也就是每一行会被扫8次，用于全彩显示 */
#define HUB75_MAX_SCAN_LINE     (8)     /* 最多扫描行 */
#define HUB75_MAX_TRANSFER_DATA_NUM (128)   /* 最多发送128个uint16数据 */
#define HUB75_MAX_TRANSFER_BUTES    (HUB75_MAX_TRANSFER_DATA_NUM * 2)

#define HUB75_LINE_ADDR_A_PIN_NUM         33 
#define HUB75_LINE_ADDR_B_PIN_NUM         34
#define HUB75_LINE_ADDR_C_PIN_NUM         35
#define HUB75_LINE_ADDR_D_PIN_NUM         36
#define HUB75_LAT_PIN_NUM                 8
#define HUB75_OE_PIN_NUM                  21
#define HUB75_CLK_PIN_NUM                 7

#define HUB75_G0    1
#define HUB75_R0    2
#define HUB75_B0    3
#define HUB75_G1    4
#define HUB75_R1    5
#define HUB75_B1    6
#define HUB75_G2    37
#define HUB75_R2    38
#define HUB75_B2    39
#define HUB75_G3    40
#define HUB75_R3    41
#define HUB75_B3    42

#define PSRAM_DATA_ALIGNMENT        64

typedef unsigned char uint8_t;
typedef unsigned short int  uint16_t;

static int line = 0;            /* 本次扫描行，32行16扫，一次显示两行 */

esp_lcd_i80_hub75_bus_handle_t i80_bus = NULL;
esp_lcd_panel_io_handle_t io_handle = NULL;
void led_matrix_i80_hub75_bus_init(void)
{
    /* 8080总线配置 */
    ESP_LOGI(TAG, "Initialize Intel 8080 bus");
    esp_lcd_i80_hub75_bus_config_t bus_config = {
        .clk_src = HUB75_CLK_PIN_NUM,
        .wr_gpio_num = HUB75_CLK_PIN_NUM,
        .data_gpio_nums = {
            HUB75_R0,
            HUB75_G0,
            HUB75_B0,
            HUB75_R1,
            HUB75_G1,
            HUB75_B1,
            HUB75_R2,
            HUB75_G2,
            HUB75_B2,
            HUB75_R3,
            HUB75_G3,
            HUB75_B3,
            -1,
            -1,
            -1,
            -1,
        },
        .bus_width = 16,
        .max_transfer_bytes = HUB75_MAX_TRANSFER_BUTES,   /* 每次发一行 */
        .max_scan_line = HUB75_MAX_SCAN_LINE,
        .max_scan_times = HUB75_MAX_SCAN_TIMES,
        .psram_trans_align = PSRAM_DATA_ALIGNMENT,
        .sram_trans_align = 4,
    };
    ESP_ERROR_CHECK(esp_lcd_new_i80_hub75_bus(&bus_config, &i80_bus));

    /* 8080IO设备申请 */
    esp_lcd_panel_io_i80_hub75_config_t io_config = {
        .cs_gpio_num = -1,
        .pclk_hz = HUB75_CLOCK_HZ,
        .trans_queue_depth = 10,
        .flags = {
            .pclk_idle_low = 1,               
        },
        .on_color_trans_done = NULL,
        .user_ctx = NULL,
        .lcd_cmd_bits = 0,
        .lcd_param_bits = 0,
    };
    ESP_ERROR_CHECK(esp_lcd_new_panel_io_i80_hub75(i80_bus, &io_config, &io_handle));
}

void led_matrix_addr_gpio_init(void)
{
    gpio_config_t io_conf = {
        .mode = GPIO_MODE_OUTPUT,
        .pin_bit_mask = (1ULL << HUB75_LAT_PIN_NUM) | 
                        (1ULL << HUB75_OE_PIN_NUM)  |
                        (1ULL << HUB75_LINE_ADDR_A_PIN_NUM)  |
                        (1ULL << HUB75_LINE_ADDR_B_PIN_NUM)  |
                        (1ULL << HUB75_LINE_ADDR_C_PIN_NUM)  |
                        (1ULL << HUB75_LINE_ADDR_D_PIN_NUM),
    };
    ESP_ERROR_CHECK(gpio_config(&io_conf));
}



void app_main(void)
{
    led_matrix_i80_hub75_bus_init();
    led_matrix_addr_gpio_init();

    test_init_buf(i80_bus);

    while (1) {
        /* 测试，发送一次数据 */
        ESP_LOGI(TAG, "Test send data to LCD");
        /* HUB75_COL_COUNT */
        int i = 0;
     
        hub75_send_line(io_handle, 0, 0);
        vTaskDelay(pdMS_TO_TICKS(1000));

        ESP_LOGI(TAG, "line trans done");
        gpio_set_level(HUB75_OE_PIN_NUM, 1);                        /* 失能显示 */
        gpio_set_level(HUB75_LAT_PIN_NUM, 1);                       /* 锁存拉高 */
        vTaskDelay(pdMS_TO_TICKS(1));
        gpio_set_level(HUB75_LAT_PIN_NUM, 0);   /* 拉低锁存，下降沿锁存 */     
        gpio_set_level(HUB75_LINE_ADDR_A_PIN_NUM, line & 1);        /* 行地址，A是低位（待求证） */
        gpio_set_level(HUB75_LINE_ADDR_B_PIN_NUM, (line >> 1) & 1);
        gpio_set_level(HUB75_LINE_ADDR_C_PIN_NUM, (line >> 2) & 1);
        gpio_set_level(HUB75_LINE_ADDR_D_PIN_NUM, (line >> 3) & 1);
        line ++;
        gpio_set_level(HUB75_OE_PIN_NUM, 0);    /* 使能显示 */
        vTaskDelay(pdMS_TO_TICKS(1000));
    }

}