File content as of revision 7:ef7429270f19:

#include "mbed.h"
#include "DisplayBace.h"
#include "rtos.h"
#include "AsciiFont.h"

#define VIDEO_CVBS             (0)                 /* Analog  Video Signal */
#define VIDEO_CMOS_CAMERA      (1)                 /* Digital Video Signal */
#define VIDEO_YCBCR422         (0)
#define VIDEO_RGB888           (1)
#define VIDEO_RGB565           (2)

/**** User Selection *********/
/** Camera setting **/
#define VIDEO_INPUT_METHOD     (VIDEO_CVBS) /* Select  VIDEO_CVBS or VIDEO_CMOS_CAMERA                       */
#define VIDEO_INPUT_FORMAT     (VIDEO_YCBCR422)    /* Select  VIDEO_YCBCR422 or VIDEO_RGB888 or VIDEO_RGB565        */
#define USE_VIDEO_CH           (0)                 /* Select  0 or 1            If selecting VIDEO_CMOS_CAMERA, should be 0.)               */
#define VIDEO_PAL              (0)                 /* Select  0(NTSC) or 1(PAL) If selecting VIDEO_CVBS, this parameter is not referenced.) */
/** LCD setting **/
#define LCD_TYPE               (0)                 /* Select  0(4.3inch) or 1(7.1inch) */
/*****************************/

/** LCD shield config **/
#if (LCD_TYPE == 0)
  #include "LCD_shield_config_4_3inch.h"
#else
  #include "LCD_shield_config_7_1inch.h"
#endif

/** Video and Grapics (GRAPHICS_LAYER_0) parameter **/
/* video input */
#if USE_VIDEO_CH == (0)
  #define VIDEO_INPUT_CH       (DisplayBase::VIDEO_INPUT_CHANNEL_0)
  #define VIDEO_INT_TYPE       (DisplayBase::INT_TYPE_S0_VFIELD)
#else
  #define VIDEO_INPUT_CH       (DisplayBase::VIDEO_INPUT_CHANNEL_1)
  #define VIDEO_INT_TYPE       (DisplayBase::INT_TYPE_S1_VFIELD)
#endif

/* NTSC or PAL */
#if VIDEO_PAL == 0
  #define COL_SYS              (DisplayBase::COL_SYS_NTSC_358)
#else
  #define COL_SYS              (DisplayBase::COL_SYS_PAL_443)
#endif

/* Video input and LCD layer 0 output */
#if VIDEO_INPUT_FORMAT == VIDEO_YCBCR422
  #define VIDEO_FORMAT         (DisplayBase::VIDEO_FORMAT_YCBCR422)
  #define GRAPHICS_FORMAT      (DisplayBase::GRAPHICS_FORMAT_YCBCR422)
  #define WR_RD_WRSWA          (DisplayBase::WR_RD_WRSWA_NON)
#elif VIDEO_INPUT_FORMAT == VIDEO_RGB565
  #define VIDEO_FORMAT         (DisplayBase::VIDEO_FORMAT_RGB565)
  #define GRAPHICS_FORMAT      (DisplayBase::GRAPHICS_FORMAT_RGB565)
  #define WR_RD_WRSWA          (DisplayBase::WR_RD_WRSWA_32_16BIT)
#else
  #define VIDEO_FORMAT         (DisplayBase::VIDEO_FORMAT_RGB888)
  #define GRAPHICS_FORMAT      (DisplayBase::GRAPHICS_FORMAT_RGB888)
  #define WR_RD_WRSWA          (DisplayBase::WR_RD_WRSWA_32BIT)
#endif

/* The size of the video input is adjusted to the LCD size. */
#define VIDEO_PIXEL_HW                LCD_PIXEL_WIDTH
#define VIDEO_PIXEL_VW                LCD_PIXEL_HEIGHT

/*! Frame buffer stride: Frame buffer stride should be set to a multiple of 32 or 128
    in accordance with the frame buffer burst transfer mode. */
/* FRAME BUFFER Parameter GRAPHICS_LAYER_0 */
#define FRAME_BUFFER_NUM              (3u)
#if ( VIDEO_INPUT_FORMAT == VIDEO_YCBCR422 || VIDEO_INPUT_FORMAT == VIDEO_RGB565 )
  #define FRAME_BUFFER_BYTE_PER_PIXEL (2u)
#else
  #define FRAME_BUFFER_BYTE_PER_PIXEL (4u)
#endif
#define FRAME_BUFFER_STRIDE           (((LCD_PIXEL_WIDTH * FRAME_BUFFER_BYTE_PER_PIXEL) + 31u) & ~31u)

/* TOUCH BUFFER Parameter GRAPHICS_LAYER_1 */
#define TOUCH_BUFFER_BYTE_PER_PIXEL   (2u)
#define TOUCH_BUFFER_STRIDE           (((LCD_PIXEL_WIDTH * TOUCH_BUFFER_BYTE_PER_PIXEL) + 31u) & ~31u)

/* Touch panel parameter */
#define TOUCH_NUM                     (2u)
#define DRAW_POINT                    (5)

/* STRING BUFFER Parameter GRAPHICS_LAYER_2 */
#define STRING_PIXEL_HW               (120)
#define STRING_PIXEL_VM               (24)
#define STRING_BUFFER_BYTE_PER_PIXEL  (2u)
#define STRING_BUFFER_STRIDE          (((LCD_PIXEL_WIDTH * STRING_BUFFER_BYTE_PER_PIXEL) + 31u) & ~31u)

static DisplayBase Display;
static DigitalOut  lcd_pwon(P7_15);
static DigitalOut  lcd_blon(P8_1);
static PwmOut      lcd_cntrst(P8_15);
static Serial      pc(USBTX, USBRX);
static Semaphore   sem_touch_int(0);
static TouckKey_LCD_shield touch(P4_0, P2_13, I2C_SDA, I2C_SCL);
static Thread *    p_VideoLcdTask = NULL;
static DigitalOut  led_blue(LED_BLUE);

#if defined(__ICCARM__)
/* 32 bytes aligned */
#pragma data_alignment=32
static uint8_t user_frame_buffer0[FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT];
#pragma data_alignment=32
static uint8_t user_frame_buffer1[FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT];
#pragma data_alignment=32
static uint8_t user_frame_buffer2[FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT];
#pragma data_alignment=32
static uint8_t user_frame_buffer_touch[TOUCH_BUFFER_STRIDE * LCD_PIXEL_HEIGHT];
#pragma data_alignment=32
static uint8_t user_frame_buffer_string[STRING_BUFFER_STRIDE * STRING_PIXEL_VM];
#else
/* 32 bytes aligned */
static uint8_t user_frame_buffer0[FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT]__attribute((aligned(32)));
static uint8_t user_frame_buffer1[FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT]__attribute((aligned(32)));
static uint8_t user_frame_buffer2[FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT]__attribute((aligned(32)));
static uint8_t user_frame_buffer_touch[TOUCH_BUFFER_STRIDE * LCD_PIXEL_HEIGHT]__attribute((aligned(32)));
static uint8_t user_frame_buffer_string[STRING_BUFFER_STRIDE * STRING_PIXEL_VM]__attribute((aligned(32)));
#endif
static uint8_t * FrameBufferTbl[FRAME_BUFFER_NUM] = {user_frame_buffer0, user_frame_buffer1, user_frame_buffer2};
#if VIDEO_INPUT_METHOD == VIDEO_CVBS
static volatile int32_t vfield_count = 0;
#endif
static int write_buff_num = 0;
static int read_buff_num = 0;
static bool graphics_init_end = false;

/****** cache control ******/
static void dcache_clean(void * p_buf, uint32_t size) {
    uint32_t start_addr = (uint32_t)p_buf & 0xFFFFFFE0;
    uint32_t end_addr   = (uint32_t)p_buf + size;
    uint32_t addr;

    /* Data cache clean */
    for (addr = start_addr; addr < end_addr; addr += 0x20) {
        __v7_clean_dcache_mva((void *)addr);
    }
}

/****** LCD ******/
#if(0) /* When needing LCD Vsync interrupt, please make it effective. */
static void IntCallbackFunc_LoVsync(DisplayBase::int_type_t int_type) {
    /* Interrupt callback function for Vsync interruption */
}
#endif

static void Init_LCD_Display(void) {
    DisplayBase::graphics_error_t error;
    DisplayBase::lcd_config_t lcd_config;
    PinName lvds_pin[8] = {
        /* data pin */
        P5_7, P5_6, P5_5, P5_4, P5_3, P5_2, P5_1, P5_0
    };

    lcd_pwon = 0;
    lcd_blon = 0;
    Thread::wait(100);
    lcd_pwon = 1;
    lcd_blon = 1;

    Display.Graphics_Lvds_Port_Init(lvds_pin, 8);

    /* Graphics initialization process */
    lcd_config = LcdCfgTbl_LCD_shield;
    error = Display.Graphics_init(&lcd_config);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }
    graphics_init_end = true;

#if(0) /* When needing LCD Vsync interrupt, please make it effective. */
    /* Interrupt callback function setting (Vsync signal output from scaler 0) */
    error = Display.Graphics_Irq_Handler_Set(DisplayBase::INT_TYPE_S0_LO_VSYNC, 0, IntCallbackFunc_LoVsync);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }
#endif
}

static void Start_LCD_Display(uint8_t * p_buf) {
    DisplayBase::rect_t rect;

    rect.vs = 0;
    rect.vw = LCD_PIXEL_HEIGHT;
    rect.hs = 0;
    rect.hw = LCD_PIXEL_WIDTH;
    Display.Graphics_Read_Setting(
        DisplayBase::GRAPHICS_LAYER_0,
        (void *)p_buf,
        FRAME_BUFFER_STRIDE,
        GRAPHICS_FORMAT,
        WR_RD_WRSWA,
        &rect
    );
    Display.Graphics_Start(DisplayBase::GRAPHICS_LAYER_0);
}

/****** Video ******/
#if(0) /* When needing video Vsync interrupt, please make it effective. */
static void IntCallbackFunc_ViVsync(DisplayBase::int_type_t int_type) {
    /* Interrupt callback function for Vsync interruption */
}
#endif

static void IntCallbackFunc_Vfield(DisplayBase::int_type_t int_type) {
    /* Interrupt callback function */
#if VIDEO_INPUT_METHOD == VIDEO_CVBS
    if (vfield_count == 0) {
        vfield_count = 1;
    } else {
        vfield_count = 0;
#else
    {
#endif
        if (p_VideoLcdTask != NULL) {
            p_VideoLcdTask->signal_set(1);
        }
    }
}

static void Init_Video(void) {
    DisplayBase::graphics_error_t error;

    /* Graphics initialization process */
    if (graphics_init_end == false) {
        /* When not initializing LCD, this processing is needed. */
        error = Display.Graphics_init(NULL);
        if (error != DisplayBase::GRAPHICS_OK) {
            printf("Line %d, error %d\n", __LINE__, error);
            mbed_die();
        }
        graphics_init_end = true;
    }

#if VIDEO_INPUT_METHOD == VIDEO_CVBS
    error = Display.Graphics_Video_init( DisplayBase::INPUT_SEL_VDEC, NULL);
    if( error != DisplayBase::GRAPHICS_OK ) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }
#elif VIDEO_INPUT_METHOD == VIDEO_CMOS_CAMERA
    DisplayBase::video_ext_in_config_t ext_in_config;
    PinName cmos_camera_pin[11] = {
        /* data pin */
        P2_7, P2_6, P2_5, P2_4, P2_3, P2_2, P2_1, P2_0,
        /* control pin */
        P10_0,      /* DV0_CLK   */
        P1_0,       /* DV0_Vsync */
        P1_1        /* DV0_Hsync */
    };

    /* MT9V111 camera input config */
    ext_in_config.inp_format     = DisplayBase::VIDEO_EXTIN_FORMAT_BT601; /* BT601 8bit YCbCr format */
    ext_in_config.inp_pxd_edge   = DisplayBase::EDGE_RISING;              /* Clock edge select for capturing data          */
    ext_in_config.inp_vs_edge    = DisplayBase::EDGE_RISING;              /* Clock edge select for capturing Vsync signals */
    ext_in_config.inp_hs_edge    = DisplayBase::EDGE_RISING;              /* Clock edge select for capturing Hsync signals */
    ext_in_config.inp_endian_on  = DisplayBase::OFF;                      /* External input bit endian change on/off       */
    ext_in_config.inp_swap_on    = DisplayBase::OFF;                      /* External input B/R signal swap on/off         */
    ext_in_config.inp_vs_inv     = DisplayBase::SIG_POL_NOT_INVERTED;     /* External input DV_VSYNC inversion control     */
    ext_in_config.inp_hs_inv     = DisplayBase::SIG_POL_INVERTED;         /* External input DV_HSYNC inversion control     */
    ext_in_config.inp_f525_625   = DisplayBase::EXTIN_LINE_525;           /* Number of lines for BT.656 external input */
    ext_in_config.inp_h_pos      = DisplayBase::EXTIN_H_POS_CRYCBY;       /* Y/Cb/Y/Cr data string start timing to Hsync reference */
    ext_in_config.cap_vs_pos     = 6;                                     /* Capture start position from Vsync */
    ext_in_config.cap_hs_pos     = 150;                                   /* Capture start position form Hsync */
#if (LCD_TYPE == 0)
    /* The same screen ratio as the screen ratio of the LCD. */
    ext_in_config.cap_width      = 640;                                   /* Capture width */
    ext_in_config.cap_height     = 363;                                   /* Capture height Max 468[line]
                                                                             Due to CMOS(MT9V111) output signal timing and VDC5 specification */
#else
    ext_in_config.cap_width      = 640;                                   /* Capture width  */
    ext_in_config.cap_height     = 468;                                   /* Capture height Max 468[line]
                                                                             Due to CMOS(MT9V111) output signal timing and VDC5 specification */
#endif
    error = Display.Graphics_Video_init( DisplayBase::INPUT_SEL_EXT, &ext_in_config);
    if( error != DisplayBase::GRAPHICS_OK ) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }

    /* Camera input port setting */
    error = Display.Graphics_Dvinput_Port_Init(cmos_camera_pin, 11);
    if( error != DisplayBase::GRAPHICS_OK ) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }
#endif

#if(0) /* When needing video Vsync interrupt, please make it effective. */
    /* Interrupt callback function setting (Vsync signal input to scaler 0) */
    error = Display.Graphics_Irq_Handler_Set(DisplayBase::INT_TYPE_S0_VI_VSYNC, 0, IntCallbackFunc_ViVsync);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }
#endif

    /* Interrupt callback function setting (Field end signal for recording function in scaler 0) */
    error = Display.Graphics_Irq_Handler_Set(VIDEO_INT_TYPE, 0, IntCallbackFunc_Vfield);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }
}

static void Start_Video(uint8_t * p_buf) {
    DisplayBase::graphics_error_t error;

    /* Video capture setting (progressive form fixed) */
    error = Display.Video_Write_Setting(
                VIDEO_INPUT_CH,
                COL_SYS,
                p_buf,
                FRAME_BUFFER_STRIDE,
                VIDEO_FORMAT,
                WR_RD_WRSWA,
                VIDEO_PIXEL_VW,
                VIDEO_PIXEL_HW
            );
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }

    /* Video write process start */
    error = Display.Video_Start(VIDEO_INPUT_CH);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }

    /* Video write process stop */
    error = Display.Video_Stop(VIDEO_INPUT_CH);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }

    /* Video write process start */
    error = Display.Video_Start(VIDEO_INPUT_CH);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }
}

/****** Video input is output to LCD ******/
static void video_lcd_task(void) {
    DisplayBase::graphics_error_t error;
    int wk_num;
    int i;

    /* Initialization memory */
    for (i = 0; i < FRAME_BUFFER_NUM; i++) {
        memset(FrameBufferTbl[i], 0, (FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT));
        dcache_clean(FrameBufferTbl[i], (FRAME_BUFFER_STRIDE * LCD_PIXEL_HEIGHT));
    }

    /* Start of Video */
    Start_Video(FrameBufferTbl[write_buff_num]);

    /* Wait for first video drawing */
    Thread::signal_wait(1);
    write_buff_num++;
    if (write_buff_num >= FRAME_BUFFER_NUM) {
        write_buff_num = 0;
    }
    error = Display.Video_Write_Change(VIDEO_INPUT_CH, FrameBufferTbl[write_buff_num], FRAME_BUFFER_STRIDE);
    if (error != DisplayBase::GRAPHICS_OK) {
        printf("Line %d, error %d\n", __LINE__, error);
        mbed_die();
    }

    /* Start of LCD */
    Start_LCD_Display(FrameBufferTbl[read_buff_num]);

    /* Backlight on */
    Thread::wait(200);
    lcd_cntrst.write(1.0);

    while (1) {
        Thread::signal_wait(1);
        wk_num = write_buff_num + 1;
        if (wk_num >= FRAME_BUFFER_NUM) {
            wk_num = 0;
        }
        /* If the next buffer is empty, it's changed. */
        if (wk_num != read_buff_num) {
            read_buff_num  = write_buff_num;
            write_buff_num = wk_num;
            /* Change video buffer */
            error = Display.Video_Write_Change(VIDEO_INPUT_CH, FrameBufferTbl[write_buff_num], FRAME_BUFFER_STRIDE);
            if (error != DisplayBase::GRAPHICS_OK) {
                printf("Line %d, error %d\n", __LINE__, error);
                mbed_die();
            }
            /* Change LCD buffer */
            Display.Graphics_Read_Change(DisplayBase::GRAPHICS_LAYER_0, (void *)FrameBufferTbl[read_buff_num]);
        }
    }
}

/****** Touch panel ******/
static void draw_touch_pos(uint8_t * p_buf, int id, int x, int y) {
    int idx_base;
    int wk_idx;
    int i;
    int j;
    uint8_t coller_pix[TOUCH_BUFFER_BYTE_PER_PIXEL];  /* ARGB4444 */

    /* A coordinate in the upper left is calculated from a central coordinate. */
    if ((x - (DRAW_POINT / 2)) >= 0) {
        x -= (DRAW_POINT / 2);
    }
    if (x > (LCD_PIXEL_WIDTH - DRAW_POINT)) {
        x = (LCD_PIXEL_WIDTH - DRAW_POINT);
    }
    if ((y - (DRAW_POINT / 2)) >= 0) {
        y -= (DRAW_POINT / 2);
    }
    if (y > (LCD_PIXEL_HEIGHT - DRAW_POINT)) {
        y = (LCD_PIXEL_HEIGHT - DRAW_POINT);
    }
    idx_base = (x + (LCD_PIXEL_WIDTH * y)) * TOUCH_BUFFER_BYTE_PER_PIXEL;

    /* Select color */
    if (id == 0) {
        /* Blue */
        coller_pix[0] = 0x0F;  /* 4:Green 4:Blue */
        coller_pix[1] = 0xF0;  /* 4:Alpha 4:Red  */
    } else {
        /* Pink */
        coller_pix[0] = 0x07;  /* 4:Green 4:Blue */
        coller_pix[1] = 0xFF;  /* 4:Alpha 4:Red  */
    }

    /* Drawing */
    for (i = 0; i < DRAW_POINT; i++) {
        wk_idx = idx_base + (LCD_PIXEL_WIDTH * TOUCH_BUFFER_BYTE_PER_PIXEL * i);
        for (j = 0; j < DRAW_POINT; j++) {
            p_buf[wk_idx++] = coller_pix[0];
            p_buf[wk_idx++] = coller_pix[1];
        }
    }
}

static void draw_touch_keyonoff(uint8_t * p_buf, int id, bool onoff) {
    int idx_base;
    int wk_idx;
    int i;
    int j;
    uint8_t coller_pix[TOUCH_BUFFER_BYTE_PER_PIXEL];  /* ARGB4444 */

    /* Display position */
    if (id == 0) {
        idx_base = 0;
    } else {
        idx_base = DRAW_POINT * TOUCH_BUFFER_BYTE_PER_PIXEL;
    }

    /* Select color */
    if (onoff == false) {
        /* Transparency */
        coller_pix[0] = 0x00;  /* 4:Green 4:Blue */
        coller_pix[1] = 0x00;  /* 4:Alpha 4:Red  */
    } else {
        /* White */
        coller_pix[0] = 0xff;  /* 4:Green 4:Blue */
        coller_pix[1] = 0xff;  /* 4:Alpha 4:Red  */
    }

    /* Drawing */
    for (i = 0; i < DRAW_POINT; i++) {
        wk_idx = idx_base + (LCD_PIXEL_WIDTH * TOUCH_BUFFER_BYTE_PER_PIXEL * i);
        for (j = 0; j < DRAW_POINT; j++) {
            p_buf[wk_idx++] = coller_pix[0];
            p_buf[wk_idx++] = coller_pix[1];
        }
    }
}

static void touch_int_callback(void) {
    sem_touch_int.release();
}

static void touch_task(void) {
    DisplayBase::rect_t rect;
    TouchKey::touch_pos_t touch_pos[TOUCH_NUM];
    int touch_num = 0;
    int touch_num_last = 0;
    int i;

    /* The layer by which the touch panel location is drawn */
    memset(user_frame_buffer_touch, 0, sizeof(user_frame_buffer_touch));
    dcache_clean(user_frame_buffer_touch, sizeof(user_frame_buffer_touch));
    rect.vs = 0;
    rect.vw = LCD_PIXEL_HEIGHT;
    rect.hs = 0;
    rect.hw = LCD_PIXEL_WIDTH;
    Display.Graphics_Read_Setting(
        DisplayBase::GRAPHICS_LAYER_1,
        (void *)user_frame_buffer_touch,
        TOUCH_BUFFER_STRIDE,
        DisplayBase::GRAPHICS_FORMAT_ARGB4444,
        DisplayBase::WR_RD_WRSWA_32_16BIT,
        &rect
    );
    Display.Graphics_Start(DisplayBase::GRAPHICS_LAYER_1);

    /* Callback setting */
    touch.SetCallback(&touch_int_callback);

    /* Reset touch IC */
    touch.Reset();

    while (1) {
        /* Wait touch event */
        sem_touch_int.wait();

        /* Get touch coordinates */
        touch_num = touch.GetCoordinates(TOUCH_NUM, touch_pos);

        /* When it's a new touch, touch frame buffer is initialized */
        if ((touch_num != 0) && (touch_num_last == 0)) {
            memset(user_frame_buffer_touch, 0, sizeof(user_frame_buffer_touch));
        }
        touch_num_last = touch_num;

        /* Drawing of a touch coordinate */
        for (i = 0; i < TOUCH_NUM; i ++) {
            printf("{valid=%d,x=%d,y=%d} ", touch_pos[i].valid, touch_pos[i].x, touch_pos[i].y);
            draw_touch_keyonoff(user_frame_buffer_touch, i, touch_pos[i].valid);
            if (touch_pos[i].valid) {
                draw_touch_pos(user_frame_buffer_touch, i, touch_pos[i].x, touch_pos[i].y);
            }
        }
        printf("\n");

        /* Data cache clean */
        dcache_clean(user_frame_buffer_touch, sizeof(user_frame_buffer_touch));
    }
}

/****** main ******/
int main(void) {
    DisplayBase::rect_t rect;
    char test_cnt = 0x20;

    /* Change the baud rate of the printf() */
    pc.baud(921600);

    /* Initialization of LCD */
    Init_LCD_Display();    /* When using LCD, please call before than Init_Video(). */

    /* Initialization of Video */
    Init_Video();

    /* Start Video and Lcd processing */
    p_VideoLcdTask = new Thread;
    p_VideoLcdTask->start(video_lcd_task);

    /* Start touch panel processing */
    Thread touchTask;
    touchTask.start(touch_task);

    /* The layer by which the character string is drawn */
    memset(user_frame_buffer_string, 0, sizeof(user_frame_buffer_string));
    dcache_clean(user_frame_buffer_string, sizeof(user_frame_buffer_string));
    rect.vs = LCD_PIXEL_HEIGHT - STRING_PIXEL_VM - 10;
    rect.vw = STRING_PIXEL_VM;
    rect.hs = LCD_PIXEL_WIDTH - STRING_PIXEL_HW - 10;
    rect.hw = STRING_PIXEL_HW;
    Display.Graphics_Read_Setting(
        DisplayBase::GRAPHICS_LAYER_2,
        (void *)user_frame_buffer_string,
        STRING_BUFFER_STRIDE,
        DisplayBase::GRAPHICS_FORMAT_ARGB4444,
        DisplayBase::WR_RD_WRSWA_32_16BIT,
        &rect
    );
    Display.Graphics_Start(DisplayBase::GRAPHICS_LAYER_2);

    /* String */
    AsciiFont ascii_font(user_frame_buffer_string, STRING_PIXEL_HW, STRING_PIXEL_VM,
                         STRING_BUFFER_STRIDE, STRING_BUFFER_BYTE_PER_PIXEL);
    ascii_font.DrawStr("Font:", 0, 8, 0x0000ffff, 2);
    while (1) {
        led_blue = !led_blue;
        //colour: rrrrGBAR (r:Reserve G:Green B:Blue A:Alpha R:Red
        ascii_font.DrawChar(test_cnt, 84, 0, 0x0000aa9f, 3);
        if (test_cnt < 0x7e) {
            test_cnt++;
        } else {
            test_cnt = 0x20;
        }
        dcache_clean(user_frame_buffer_string, sizeof(user_frame_buffer_string));
        Thread::wait(1000);
    }
}