Tomo Yamanaka / Mbed OS GR-LYCHEE_mbed-os-client-ZXingSample

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).

Diff: zxing_main.cpp

Revision:
10:c36cf363bf55
Parent:
6:4e43b6f8f772
--- a/zxing_main.cpp	Mon Mar 19 07:39:08 2018 +0000
+++ b/zxing_main.cpp	Thu Apr 19 08:35:21 2018 +0000
@@ -2,6 +2,7 @@
 #include "mbed.h"
 #include "EasyAttach_CameraAndLCD.h"
 #include "ImageReaderSource.h"
+#include "AsciiFont.h"
 
 /**** User Selection *********/
 /** JPEG out setting **/
@@ -10,8 +11,6 @@
 #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)
-/** Camera setting **/
-#define OV7725_SETTING_TEST    (0)                 /* Exposure and Gain Setting Test 0:disable 1:enable */
 /*****************************/
 
 /* Video input and LCD layer 0 output */
@@ -121,16 +120,6 @@
         }
     }
 }
-
-#if OV7725_SETTING_TEST
-static DisplayApp::touch_pos_t s_touch;
-
-static bool touch_notification = false;
-
-static void touch_callback(void) {
-    touch_notification = true;
-}
-#endif
 #endif
 
 static void Start_Video_Camera(void) {
@@ -169,6 +158,70 @@
     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
 
 
@@ -180,17 +233,19 @@
         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);
-#if OV7725_SETTING_TEST
-    display_app.SetCallback(&touch_callback);
-#endif
 #endif
     Start_Video_Camera();
 #if MBED_CONF_APP_LCD
+    decode_string_init();
     Start_LCD_Display();
 #endif
 
@@ -205,28 +260,6 @@
     vector<Ref<Result> > results;
     char ** decode_str = NULL;
 
-#if JPEG_SEND
-        snapshot();
-#if OV7725_SETTING_TEST
-        // OV7725 Setting test
-        if (touch_notification) {
-            display_app.GetCoordinates(1, &s_touch);
-            if (s_touch.valid) {
-                uint16_t usManualExposure = (uint16_t)(0xFFFF * ((float)s_touch.x / 800.f));
-                uint8_t  usManualGain = (uint8_t)(0xFF * ((float)s_touch.y / 480.0f));
-                OV7725_config::SetExposure(false, usManualExposure, usManualGain);
-                printf("usManualExposure 0x%04x, usManualGain 0x%02x\r\n", usManualExposure, usManualGain);
-            } else {
-                OV7725_config::SetExposure(true, 0x0000, 0x00);
-                printf("SetExposure Auto\r\n");
-            }
-            touch_notification = false;
-        }
-#endif
-#else
-        Thread::wait(1000);
-#endif
-
     /* Decode barcode image */
     if (decode_timer.read_ms() >= decode_wait_time) {
         decode_timer.reset();
@@ -243,6 +276,9 @@
         } else {
             decode_wait_time = 10;
         }
+#if MBED_CONF_APP_LCD
+        decode_string_disp(decode_str);
+#endif
     }
 
     return decode_result;