Mbed Client sample for GR-LYCHEE where ZXing is incorporated.

Dependencies:   DisplayApp AsciiFont

Fork of GR-PEACH_mbed-os-client-ZXingSample by Renesas

Overview

This sample program shows how to use mbed Client together with ZXing which is an open-source, multi-format 1D/2D barcode image processing library. For more info on ZXing, please refer to https://github.com/zxing/zxing.

Required hardware

Application setup

  1. Select the connection type. For details, please refer to the following wiki:
    https://os.mbed.com/users/1050186/code/GR-LYCHEE_mbed-os-client-ZXingSample/wiki/Connection-type.
  2. Set the client credentials. For details, please refer to the following wiki:
    https://os.mbed.com/users/1050186/code/GR-LYCHEE_mbed-os-client-ZXingSample/wiki/Client-credentials.
  3. Change Wifi settings. For details, please refer to the following wiki:
    https://os.mbed.com/users/1050186/code/GR-LYCHEE_mbed-os-client-ZXingSample/wiki/Wifi-settings.

Building the example

To build this example:

  1. Import this example onto mbed Compiler.
  2. Configure the example in accordance with Application setup.
  3. Compile the example on mbed Compiler and download the resultant binary file.
  4. Plug the micro-USB cable into the OpenSDA port which lies on the next to the RESET button.
  5. Copy the binary previously downloaded to your PC to GR-LYCHEE to flash this example. When the copy is successfully completed, the board is ready to work.
  6. Press the RESET button on the board to run the example.
  7. For verification, please refer to the following wiki:
    https://os.mbed.com/users/1050186/code/GR-LYCHEE_mbed-os-client-ZXingSample/wiki/Monitoring-the-application.

Application resources

This example exposes four resources listed below:

  1. 3202/0/5700. Decode result of barcode data input from camera (GET).
  2. 3201/0/5850. Blink function, blinks LED when executed (POST).
  3. 3201/0/5853. Blink pattern, used by the blink function to determine how to blink. In the format of 1000:500:1000:500:1000:500 (PUT).
  4. 3201/0/5855. Blink color, used by the blink function. Any of green, yellow, orange and red is acceptable (PUT).

zxing_main.cpp

Committer:
<>
Date:
2016-10-06
Revision:
0:eb73febb2bba
Child:
2:6ec5c1c1d41c

File content as of revision 0:eb73febb2bba:


#include <vector>

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

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

/**** User Selection *********/
/** Camera setting **/
#define VIDEO_INPUT_METHOD     (VIDEO_CMOS_CAMERA) /* Select  VIDEO_CVBS or VIDEO_CMOS_CAMERA                       */
#define VIDEO_INPUT_FORMAT     (VIDEO_RGB888)      /* Select  VIDEO_RGB888                                          */
#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_ONOFF              (1)                 /* Select  0(without LCD) or 1(with LCD) */
#if LCD_ONOFF
#define LCD_TYPE               (0)                 /* Select  0(4.3inch) or 1(7.1inch) */
#endif
/*****************************/

#if LCD_ONOFF
/** LCD shield config **/
#if (LCD_TYPE == 0)
  #include "LCD_shield_config_4_3inch.h"
#else
  #include "LCD_shield_config_7_1inch.h"
#endif
#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 */
#define VIDEO_FORMAT           (DisplayBase::VIDEO_FORMAT_RGB888)
#define GRAPHICS_FORMAT        (DisplayBase::GRAPHICS_FORMAT_RGB888)
#define WR_RD_WRSWA            (DisplayBase::WR_RD_WRSWA_32BIT)

/* The size of the video input */
#if ((LCD_ONOFF) && (LCD_TYPE == 0))
  #define VIDEO_PIXEL_HW                LCD_PIXEL_WIDTH
  #define VIDEO_PIXEL_VW                LCD_PIXEL_HEIGHT
#else
  #define VIDEO_PIXEL_HW                (640)  /* VGA */
  #define VIDEO_PIXEL_VW                (480)  /* VGA */
#endif

/*! 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              (2u)
#define FRAME_BUFFER_BYTE_PER_PIXEL   (4u)
#define FRAME_BUFFER_STRIDE           (((VIDEO_PIXEL_HW * FRAME_BUFFER_BYTE_PER_PIXEL) + 31u) & ~31u)

#if LCD_ONOFF
#define VIDEO_PIXEL_HW_STR              (VIDEO_PIXEL_HW - 64)
#define VIDEO_PIXEL_VW_STR              (VIDEO_PIXEL_VW - 64)
#define FRAME_BUFFER_BYTE_PER_PIXEL_STR (2u)
#define FRAME_BUFFER_STRIDE_STR         (((VIDEO_PIXEL_HW_STR * FRAME_BUFFER_BYTE_PER_PIXEL_STR) + 31u) & ~31u)
#endif

static DisplayBase Display;
static DisplayApp  display_app;
static Timer decode_timer;
#if LCD_ONOFF
static DigitalOut  lcd_pwon(P7_15);
static DigitalOut  lcd_blon(P8_1);
static PwmOut      lcd_cntrst(P8_15);
#endif

/* 32 bytes aligned */
static uint8_t user_frame_buffer0[FRAME_BUFFER_STRIDE * VIDEO_PIXEL_VW]__attribute((aligned(32)));
static uint8_t user_frame_buffer1[FRAME_BUFFER_STRIDE * VIDEO_PIXEL_VW]__attribute((aligned(32)));
#if LCD_ONOFF
static uint8_t user_frame_buffer_string[FRAME_BUFFER_STRIDE_STR * VIDEO_PIXEL_VW_STR]__attribute((aligned(32)));
static AsciiFont ascii_font(user_frame_buffer_string, VIDEO_PIXEL_HW_STR, VIDEO_PIXEL_VW_STR, FRAME_BUFFER_STRIDE_STR, FRAME_BUFFER_BYTE_PER_PIXEL_STR);
static bool      string_draw;
#endif
static uint8_t * decode_buffer = user_frame_buffer0;
static uint8_t * FrameBufferTbl[FRAME_BUFFER_NUM] = {user_frame_buffer0, user_frame_buffer1};
static volatile int32_t vfield_count = 0;
static int write_buff_num = 0;
static bool graphics_init_end = false;
static int decode_wait_time = 0;
static void (*p_callback_func)(char * addr, int size);

/****** 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);
    }
}

static void dcache_invalid(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 invalid */
    for (addr = start_addr; addr < end_addr; addr += 0x20) {
        __v7_inv_dcache_mva((void *)addr);
    }
}

#if LCD_ONOFF
/****** LCD ******/
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;
}

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

    rect.vs = 0;
    rect.vw = VIDEO_PIXEL_VW;
    rect.hs = 0;
    rect.hw = VIDEO_PIXEL_HW;
    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);
}
#endif

/****** Video ******/
static void IntCallbackFunc_Vfield(DisplayBase::int_type_t int_type) {
    /* Interrupt callback function for Vfield interruption */
    if (vfield_count > 0) {
        vfield_count--;
    }
}

static void Wait_Vfield(const int32_t wait_count) {
    /* Wait for the specified number of times Vsync occurs */
    vfield_count = wait_count;
    while (vfield_count > 0) {
        Thread::wait(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_ONOFF) && (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

    /* 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();
    }
}

/****** zxing_init ******/
void zxing_init(void (*pfunc)(char * addr, int size)) {

#if LCD_ONOFF
    /* Initialization of LCD */
    Init_LCD_Display();    /* When using LCD, please call before than Init_Video(). */
#endif
    /* Initialization of Video */
    Init_Video();

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

    /* Start of Video */
    Start_Video(FrameBufferTbl[write_buff_num]);
    /* Wait for first video drawing */
    Wait_Vfield(2);
#if LCD_ONOFF
    DisplayBase::rect_t rect;

    /* The layer by which the touch panel location is drawn */
    ascii_font.Erase(0x00000000);  /* rrrrGBAR (r:Reserve G:Green B:Blue A:Alpha R:Red */
    dcache_clean(user_frame_buffer_string, sizeof(user_frame_buffer_string));
    rect.vs = 32;
    rect.vw = VIDEO_PIXEL_VW_STR;
    rect.hs = 32;
    rect.hw = VIDEO_PIXEL_HW_STR;
    Display.Graphics_Read_Setting(
        DisplayBase::GRAPHICS_LAYER_1,
        (void *)user_frame_buffer_string,
        FRAME_BUFFER_STRIDE_STR,
        DisplayBase::GRAPHICS_FORMAT_ARGB4444,
        DisplayBase::WR_RD_WRSWA_32_16BIT,
        &rect
    );
    Display.Graphics_Start(DisplayBase::GRAPHICS_LAYER_1);
    string_draw = false;
    /* Start of LCD */
    Start_LCD_Display(FrameBufferTbl[write_buff_num]);
    /* Backlight on */
    Thread::wait(200);
    lcd_cntrst.write(1.0);
#endif
    p_callback_func = pfunc;
    decode_timer.reset();
    decode_timer.start();
}

/****** zxing_main ******/
int zxing_loop() {
    DisplayBase::graphics_error_t error;
    int decode_result = -1;
    vector<Ref<Result> > results;

    decode_buffer = FrameBufferTbl[write_buff_num];
    write_buff_num++;
    if (write_buff_num >= FRAME_BUFFER_NUM) {
        write_buff_num = 0;
    }
    /* 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();
    }
    Wait_Vfield(2);
#if LCD_ONOFF
    /* Change LCD buffer */
    Display.Graphics_Read_Change(DisplayBase::GRAPHICS_LAYER_0, (void *)FrameBufferTbl[write_buff_num]);
#endif
    dcache_invalid(decode_buffer, (FRAME_BUFFER_STRIDE * VIDEO_PIXEL_VW));
    /* Decode barcode image */
    if (decode_timer.read_ms() >= decode_wait_time) {
        decode_timer.reset();
        decode_result = ex_decode(decode_buffer, (FRAME_BUFFER_STRIDE * VIDEO_PIXEL_VW), VIDEO_PIXEL_HW, VIDEO_PIXEL_VW, &results);
        if (decode_result == 0) {
            char ** decode_str;
            int     size;

            decode_str = (char **)&(results[0]->getText()->getText());
            size = strlen(*decode_str);
            if (p_callback_func != NULL) {
                p_callback_func(*decode_str, size);
            }
#if LCD_ONOFF
            /* Drow string */
            ascii_font.Erase(0x00000090);  /* rrrrGBAR (r:Reserve G:Green B:Blue A:Alpha R:Red */
            int rest_size = strlen(*decode_str);
            int draw_idx = 0;
            int draw_size;
            int draw_line = 0;

            while (rest_size > 0) {
                draw_size = ascii_font.DrawStr(*decode_str + draw_idx, 6, 5 + (18 * draw_line), 0x0000ffff, 2);
                if (draw_size <= 0) {
                    break;
                }
                rest_size -= draw_size;
                draw_idx += draw_size;
                draw_line++;
            }
           
            dcache_clean(user_frame_buffer_string, sizeof(user_frame_buffer_string));
            string_draw = true;
#endif
            decode_wait_time = 500;
        } else {
#if LCD_ONOFF
            if (string_draw != false) {
                /* Clear string */
                ascii_font.Erase(0x00000000);  /* rrrrGBAR (r:Reserve G:Green B:Blue A:Alpha R:Red */
                dcache_clean(user_frame_buffer_string, sizeof(user_frame_buffer_string));
                string_draw = false;
            }
#endif
            decode_wait_time = 10;
        }
    }
    display_app.SendRgb888(decode_buffer, VIDEO_PIXEL_HW, VIDEO_PIXEL_VW);

    return decode_result;
}