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:
1050186
Date:
19 months ago
Revision:
22:a3cd35c5cff0
Parent:
10:c36cf363bf55

File content as of revision 22:a3cd35c5cff0:


#include "mbed.h"
#include "EasyAttach_CameraAndLCD.h"
#include "ImageReaderSource.h"
#include "AsciiFont.h"

/**** User Selection *********/
/** JPEG out setting **/
#define JPEG_SEND              (1)                 /* Select  0(JPEG images are not output to PC) or 1(JPEG images are output to PC on USB(CDC) for focusing the camera) */
#define JPEG_ENCODE_QUALITY    (75)                /* JPEG encode quality (min:1, max:75 (Considering the size of JpegBuffer, about 75 is the upper limit.)) */
#define VFIELD_INT_SKIP_CNT    (0)                 /* A guide for GR-LYCHEE.  0:60fps, 1:30fps, 2:20fps, 3:15fps, 4:12fps, 5:10fps */
/** Decode hints **/
#define DECODE_HINTS           (DecodeHints::ONED_HINT | DecodeHints::QR_CODE_HINT | DecodeHints::DATA_MATRIX_HINT | DecodeHints::AZTEC_HINT)
/*****************************/

/* Video input and LCD layer 0 output */
#define VIDEO_FORMAT           (DisplayBase::VIDEO_FORMAT_YCBCR422)
#define GRAPHICS_FORMAT        (DisplayBase::GRAPHICS_FORMAT_YCBCR422)
//#define WR_RD_WRSWA            (DisplayBase::WR_RD_WRSWA_32_16BIT)
#define WR_RD_WRSWA            (DisplayBase::WR_RD_WRSWA_16BIT)
#define DATA_SIZE_PER_PIC      (2u)

/*! 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. */
#if MBED_CONF_APP_LCD
  #define VIDEO_PIXEL_HW       LCD_PIXEL_WIDTH   /* QVGA */
  #define VIDEO_PIXEL_VW       LCD_PIXEL_HEIGHT  /* QVGA */
#else
  #define VIDEO_PIXEL_HW       (640u)  /* VGA */
  #define VIDEO_PIXEL_VW       (480u)  /* VGA */
#endif

#define FRAME_BUFFER_STRIDE    (((VIDEO_PIXEL_HW * DATA_SIZE_PER_PIC) + 31u) & ~31u)
#define FRAME_BUFFER_HEIGHT    (VIDEO_PIXEL_VW)

DisplayBase Display;
// Timer
static Timer decode_timer;

#if defined(__ICCARM__)
#pragma data_alignment=32
static uint8_t user_frame_buffer0[FRAME_BUFFER_STRIDE * FRAME_BUFFER_HEIGHT]@ ".mirrorram";
#else
static uint8_t user_frame_buffer0[FRAME_BUFFER_STRIDE * FRAME_BUFFER_HEIGHT]__attribute((section("NC_BSS"),aligned(32)));
#endif

#if JPEG_SEND
#include "JPEG_Converter.h"
#include "DisplayApp.h"
#include "dcache-control.h"

#if defined(__ICCARM__)
#pragma data_alignment=32
static uint8_t JpegBuffer[2][1024 * 64];
#else
static uint8_t JpegBuffer[2][1024 * 64]__attribute((aligned(32)));
#endif
static size_t jcu_encode_size[2];
static JPEG_Converter Jcu;
static int jcu_buf_index_write = 0;
static int jcu_buf_index_write_done = 0;
static int jcu_buf_index_read = 0;
static volatile int jcu_encoding = 0;
static volatile int image_change = 0;
static DisplayApp  display_app;
static int Vfield_Int_Cnt = 0;

static int decode_wait_time = 0;
static void (*p_callback_func)(char * addr, int size);

static void JcuEncodeCallBackFunc(JPEG_Converter::jpeg_conv_error_t err_code) {
    if (err_code == JPEG_Converter::JPEG_CONV_OK) {
        jcu_buf_index_write_done = jcu_buf_index_write;
        image_change = 1;
    }
    jcu_encoding = 0;
}

static void snapshot(void) {
    while ((jcu_encoding == 1) || (image_change == 0)) {
        Thread::wait(1);
    }
    jcu_buf_index_read = jcu_buf_index_write_done;
    image_change = 0;
    display_app.SendJpeg(JpegBuffer[jcu_buf_index_read], (int)jcu_encode_size[jcu_buf_index_read]);
}

static void IntCallbackFunc_Vfield(DisplayBase::int_type_t int_type) {
    if (Vfield_Int_Cnt < VFIELD_INT_SKIP_CNT) {
        Vfield_Int_Cnt++;
        return;
    }
    Vfield_Int_Cnt = 0;

    //Interrupt callback function
    if (jcu_encoding == 0) {
        JPEG_Converter::bitmap_buff_info_t bitmap_buff_info;
        JPEG_Converter::encode_options_t   encode_options;

        bitmap_buff_info.width              = VIDEO_PIXEL_HW;
        bitmap_buff_info.height             = VIDEO_PIXEL_VW;
        bitmap_buff_info.format             = JPEG_Converter::WR_RD_YCbCr422;
        bitmap_buff_info.buffer_address     = (void *)user_frame_buffer0;

        encode_options.encode_buff_size     = sizeof(JpegBuffer[0]);
        encode_options.p_EncodeCallBackFunc = &JcuEncodeCallBackFunc;
//        encode_options.input_swapsetting    = JPEG_Converter::WR_RD_WRSWA_32_16_8BIT;
        encode_options.input_swapsetting    = JPEG_Converter::WR_RD_WRSWA_16_8BIT;

        jcu_encoding = 1;
        if (jcu_buf_index_read == jcu_buf_index_write) {
            jcu_buf_index_write ^= 1;  // toggle
        }
        jcu_encode_size[jcu_buf_index_write] = 0;
        dcache_invalid(JpegBuffer[jcu_buf_index_write], sizeof(JpegBuffer[0]));
        if (Jcu.encode(&bitmap_buff_info, JpegBuffer[jcu_buf_index_write],
            &jcu_encode_size[jcu_buf_index_write], &encode_options) != JPEG_Converter::JPEG_CONV_OK) {
            jcu_encode_size[jcu_buf_index_write] = 0;
            jcu_encoding = 0;
        }
    }
}
#endif

static void Start_Video_Camera(void) {
    // Video capture setting (progressive form fixed)
    Display.Video_Write_Setting(
        DisplayBase::VIDEO_INPUT_CHANNEL_0,
        DisplayBase::COL_SYS_NTSC_358,
        (void *)user_frame_buffer0,
        FRAME_BUFFER_STRIDE,
        VIDEO_FORMAT,
        WR_RD_WRSWA,
        VIDEO_PIXEL_VW,
        VIDEO_PIXEL_HW
    );
    EasyAttach_CameraStart(Display, DisplayBase::VIDEO_INPUT_CHANNEL_0);
}

#if MBED_CONF_APP_LCD
static void Start_LCD_Display(void) {
    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 *)user_frame_buffer0,
        FRAME_BUFFER_STRIDE,
        GRAPHICS_FORMAT,
        WR_RD_WRSWA,
        &rect
    );
    Display.Graphics_Start(DisplayBase::GRAPHICS_LAYER_0);

    Thread::wait(50);
    EasyAttach_LcdBacklight(true);
}

#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)

static uint8_t user_frame_buffer_string[FRAME_BUFFER_STRIDE_STR * VIDEO_PIXEL_VW_STR]__attribute((section("NC_BSS"),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;
static int error_cnt;

static void decode_string_init(void) {
    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 */
    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_2,
        (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_2);
    string_draw = false;
    error_cnt = 0;
}

static void decode_string_disp(char ** decode_str) {
    if ((decode_str != NULL) && (*decode_str != NULL)) {
        /* 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++;
        }
        string_draw = true;
        error_cnt = 0;
    } else {
        if (string_draw != false) {
            error_cnt++;
            if (error_cnt > 15) {
                /* Clear string */
                ascii_font.Erase(0x00000000);  /* rrrrGBAR (r:Reserve G:Green B:Blue A:Alpha R:Red */
                string_draw = false;
            }
        }
    }
}
#endif


/****** zxing_init ******/
void zxing_init(void (*pfunc)(char * addr, int size)) {
    // Initialize the background to black
    for (int i = 0; i < (int)sizeof(user_frame_buffer0); i += 2) {
        user_frame_buffer0[i + 0] = 0x10;
        user_frame_buffer0[i + 1] = 0x80;
    }

#if MBED_CONF_APP_LCD
    EasyAttach_Init(Display, 640, 360);
#else
    EasyAttach_Init(Display);
#endif
#if JPEG_SEND
    Jcu.SetQuality(JPEG_ENCODE_QUALITY);
    // Interrupt callback function setting (Field end signal for recording function in scaler 0)
    Display.Graphics_Irq_Handler_Set(DisplayBase::INT_TYPE_S0_VFIELD, 0, IntCallbackFunc_Vfield);
#endif
    Start_Video_Camera();
#if MBED_CONF_APP_LCD
    decode_string_init();
    Start_LCD_Display();
#endif

    p_callback_func = pfunc;
    decode_timer.reset();
    decode_timer.start();
}

/****** zxing_main ******/
int zxing_loop() {
    int decode_result = -1;
    vector<Ref<Result> > results;
    char ** decode_str = NULL;

    /* Decode barcode image */
    if (decode_timer.read_ms() >= decode_wait_time) {
        decode_timer.reset();
        DecodeHints hints(DECODE_HINTS);
        hints.setTryHarder(false);
        decode_result = ex_decode(user_frame_buffer0, (FRAME_BUFFER_STRIDE * VIDEO_PIXEL_VW), VIDEO_PIXEL_HW, VIDEO_PIXEL_VW, &results, hints);
        if (decode_result == 0) {
            decode_str = (char **)&(results[0]->getText()->getText());
            int size = strlen(*decode_str);
            if (p_callback_func != NULL) {
                p_callback_func(*decode_str, size);
            }
            decode_wait_time = 500;
        } else {
            decode_wait_time = 10;
        }
#if MBED_CONF_APP_LCD
        decode_string_disp(decode_str);
#endif
    }

    return decode_result;
}