/**
 * @file GC9A01.c
 *
 */

/*********************
 *      INCLUDES
 *********************/
#include "GC9A01.h"
#include "disp_spi.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

/*********************
 *      DEFINES
 *********************/
 #define TAG "GC9A01"

/**********************
 *      TYPEDEFS
 **********************/

/*The LCD needs a bunch of command/argument values to be initialized. They are stored in this struct. */
typedef struct {
    uint8_t cmd;
    uint8_t data[16];
    uint8_t databytes; //No of data in data; bit 7 = delay after set; 0xFF = end of cmds.
} lcd_init_cmd_t;

/**********************
 *  STATIC PROTOTYPES
 **********************/
static void GC9A01_set_orientation(uint8_t orientation);

static void GC9A01_send_cmd(uint8_t cmd);
static void GC9A01_send_data(void * data, uint16_t length);
static void GC9A01_send_color(void * data, uint16_t length);

/**********************
 *  STATIC VARIABLES
 **********************/

/**********************
 *      MACROS
 **********************/

/**********************
 *   GLOBAL FUNCTIONS
 **********************/

void GC9A01_init(void)
{
	lcd_init_cmd_t GC_init_cmds[]={
////////////////////////////////////////////
		{0xEF, {0}, 0},
		{0xEB, {0x14}, 1},

		{0xFE, {0}, 0},
		{0xEF, {0}, 0},

		{0xEB, {0x14}, 1},
		{0x84, {0x40}, 1},
		{0x85, {0xFF}, 1},
		{0x86, {0xFF}, 1},
		{0x87, {0xFF}, 1},
		{0x88, {0x0A}, 1},
		{0x89, {0x21}, 1},
		{0x8A, {0x00}, 1},
		{0x8B, {0x80}, 1},
		{0x8C, {0x01}, 1},
		{0x8D, {0x01}, 1},
		{0x8E, {0xFF}, 1},
		{0x8F, {0xFF}, 1},
		{0xB6, {0x00, 0x20}, 2},
		//call orientation
		{0x3A, {0x05}, 1},
		{0x90, {0x08, 0x08, 0X08, 0X08}, 4},
		{0xBD, {0x06}, 1},
		{0xBC, {0x00}, 1},
		{0xFF, {0x60, 0x01, 0x04}, 3},
		{0xC3, {0x13}, 1},
		{0xC4, {0x13}, 1},
		{0xC9, {0x22}, 1},
		{0xBE, {0x11}, 1},
		{0xE1, {0x10, 0x0E}, 2},
		{0xDF, {0x21, 0x0C, 0x02}, 3},
		{0xF0, {0x45, 0x09, 0x08, 0x08, 0x26, 0x2A}, 6},
		{0xF1, {0x43, 0x70, 0x72, 0x36, 0x37, 0x6F}, 6},
		{0xF2, {0x45, 0x09, 0x08, 0x08, 0x26, 0x2A}, 6},
		{0xF3, {0x43, 0x70, 0x72, 0x36, 0x37, 0x6F}, 6},
		{0xED, {0x1B, 0x0B}, 2},
		{0xAE, {0x77}, 1},
		{0xCD, {0x63}, 1},
		{0x70, {0x07, 0x07, 0x04, 0x0E, 0x0F, 0x09, 0x07, 0X08, 0x03}, 9},
		{0xE8, {0x34}, 1},
		{0x62, {0x18, 0x0D, 0x71, 0xED, 0x70, 0x70, 0x18, 0X0F, 0x71, 0xEF, 0x70, 0x70}, 12},
		{0x63, {0x18, 0x11, 0x71, 0xF1, 0x70, 0x70, 0x18, 0X13, 0x71, 0xF3, 0x70, 0x70}, 12},
		{0x64, {0x28, 0x29, 0xF1, 0x01, 0xF1, 0x00, 0x07}, 7},
		{0x66, {0x3C, 0x00, 0xCD, 0x67, 0x45, 0x45, 0x10, 0X00, 0x00, 0x00}, 10},
		{0x67, {0x00, 0x3C, 0x00, 0x00, 0x00, 0x01, 0x54, 0X10, 0x32, 0x98}, 10},
		{0x74, {0x10, 0x85, 0x80, 0x00, 0x00, 0x4E, 0x00}, 7},
		{0x98, {0x3E, 0x07}, 2},
		{0x35, {0}, 0},
		{0x21, {0}, 0},
		{0x11, {0}, 0x80},	//0x80 delay flag
		{0x29, {0}, 0x80},	//0x80 delay flag
		{0, {0}, 0xff},		//init end flag
////////////////////////////////////////////

	};

	//Initialize non-SPI GPIOs
    gpio_pad_select_gpio(GC9A01_DC);
	gpio_set_direction(GC9A01_DC, GPIO_MODE_OUTPUT);

#if GC9A01_USE_RST
    gpio_pad_select_gpio(GC9A01_RST);
	gpio_set_direction(GC9A01_RST, GPIO_MODE_OUTPUT);

	//Reset the display
	gpio_set_level(GC9A01_RST, 0);
	vTaskDelay(100 / portTICK_RATE_MS);
	gpio_set_level(GC9A01_RST, 1);
	vTaskDelay(100 / portTICK_RATE_MS);
#endif

	ESP_LOGI(TAG, "Initialization.");

	//Send all the commands
	uint16_t cmd = 0;
	while (GC_init_cmds[cmd].databytes!=0xff) {
		GC9A01_send_cmd(GC_init_cmds[cmd].cmd);
		GC9A01_send_data(GC_init_cmds[cmd].data, GC_init_cmds[cmd].databytes&0x1F);
		if (GC_init_cmds[cmd].databytes & 0x80) {
			vTaskDelay(100 / portTICK_RATE_MS);
		}
		cmd++;
	}

	GC9A01_set_orientation(CONFIG_LV_DISPLAY_ORIENTATION);

#if GC9A01_INVERT_COLORS == 1
	GC9A01_send_cmd(0x21);
#else
	GC9A01_send_cmd(0x20);
#endif
}


void GC9A01_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * color_map)
{
	uint8_t data[4];

	/*Column addresses*/
	GC9A01_send_cmd(0x2A);				//0x2A
	data[0] = (area->x1 >> 8) & 0xFF;
	data[1] = area->x1 & 0xFF;
	data[2] = (area->x2 >> 8) & 0xFF;
	data[3] = area->x2 & 0xFF;
	GC9A01_send_data(data, 4);

	/*Page addresses*/
	GC9A01_send_cmd(0x2B);				//0x2B
	data[0] = (area->y1 >> 8) & 0xFF;
	data[1] = area->y1 & 0xFF;
	data[2] = (area->y2 >> 8) & 0xFF;
	data[3] = area->y2 & 0xFF;
	GC9A01_send_data(data, 4);

	/*Memory write*/
	GC9A01_send_cmd(0x2C);				//0x2C


	uint32_t size = lv_area_get_width(area) * lv_area_get_height(area);

	GC9A01_send_color((void*)color_map, size * 2);
}

void GC9A01_sleep_in()
{
	uint8_t data[] = {0x08};
	GC9A01_send_cmd(0x10);			//0x10 Enter Sleep Mode
	GC9A01_send_data(&data, 1);
}

void GC9A01_sleep_out()
{
	uint8_t data[] = {0x08};
	GC9A01_send_cmd(0x11);		    //0x11 Sleep OUT
	GC9A01_send_data(&data, 1);
}

/**********************
 *   STATIC FUNCTIONS
 **********************/


static void GC9A01_send_cmd(uint8_t cmd)
{
    disp_wait_for_pending_transactions();
    gpio_set_level(GC9A01_DC, 0);	 /*Command mode*/
    disp_spi_send_data(&cmd, 1);
}

static void GC9A01_send_data(void * data, uint16_t length)
{
    disp_wait_for_pending_transactions();
    gpio_set_level(GC9A01_DC, 1);	 /*Data mode*/
    disp_spi_send_data(data, length);
}

static void GC9A01_send_color(void * data, uint16_t length)
{
    disp_wait_for_pending_transactions();
    gpio_set_level(GC9A01_DC, 1);   /*Data mode*/
    disp_spi_send_colors(data, length);
}

static void GC9A01_set_orientation(uint8_t orientation)
{
    assert(orientation < 4);

    const char *orientation_str[] = {
        "PORTRAIT", "PORTRAIT_INVERTED", "LANDSCAPE", "LANDSCAPE_INVERTED"
    };

    ESP_LOGI(TAG, "Display orientation: %s", orientation_str[orientation]);

#if defined CONFIG_LV_PREDEFINED_DISPLAY_M5STACK
    const uint8_t data[] = {0x68, 0x68, 0x08, 0x08};
#elif defined (CONFIG_LV_PREDEFINED_DISPLAY_WROVER4)
    const uint8_t data[] = {0x4C, 0x88, 0x28, 0xE8};
#else
    const uint8_t data[] = {0x08, 0xC8, 0x68, 0xA8};
#endif

    ESP_LOGD(TAG, "0x36 command value: 0x%02X", data[orientation]);

    GC9A01_send_cmd(0x36);
    GC9A01_send_data((void *) &data[orientation], 1);
}