Add camtest

apps/com.example.camtest/META-INF/MANIFEST.MF

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+Manifest-Version: 1.0
+Name: CamTest
+Start-Script: assets/camtest.py

apps/com.example.camtest/assets/camtest.py

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+#define PWDN_GPIO_NUM 17  //power down is not used
+#define RESET_GPIO_NUM -1 //software reset will be performed
+#define XCLK_GPIO_NUM 8
+#define SIOD_GPIO_NUM 21
+#define SIOC_GPIO_NUM 16
+
+#define Y9_GPIO_NUM 2
+#define Y8_GPIO_NUM 7
+#define Y7_GPIO_NUM 10
+#define Y6_GPIO_NUM 14
+#define Y5_GPIO_NUM 11
+#define Y4_GPIO_NUM 15
+#define Y3_GPIO_NUM 13
+#define Y2_GPIO_NUM 12
+#define VSYNC_GPIO_NUM 6
+#define HREF_GPIO_NUM 4
+#define PCLK_GPIO_NUM 9
+
+#define CAM_LEDC_TIMER      LEDC_TIMER_1
+#define CAM_LEDC_CHANNEL    LEDC_CHANNEL_0
+
+
+from camera import Camera, GrabMode, PixelFormat, FrameSize, GainCeiling
+
+cam = Camera(
+    data_pins=[12,13,15,11,14,10,7,2],
+    vsync_pin=6,
+    href_pin=4,
+    sda_pin=21,
+    scl_pin=16,
+    pclk_pin=9,
+    xclk_pin=8,
+    xclk_freq=20000000,
+    powerdown_pin=-1,
+    reset_pin=-1,
+    #pixel_format=PixelFormat.RGB565,frame_size=FrameSize.QQVGA,grab_mode=GrabMode.LATEST # 160x120, FrameSize.QVGA = 320x240
+    #pixel_format=PixelFormat.JPEG,frame_size=FrameSize.QVGA,grab_mode=GrabMode.LATEST
+)
+
+cam.init()
+
+#cam.reconfigure(pixel_format=PixelFormat.RAW,frame_size=FrameSize.QVGA,grab_mode=GrabMode.LATEST, fb_count=2)
+#cam.reconfigure(pixel_format=PixelFormat.YUV420,frame_size=FrameSize.QVGA,grab_mode=GrabMode.LATEST, fb_count=2)
+
+#img = cam.capture()
+
+def memoryview_to_hex_spaced(mv: memoryview) -> str:
+    """Convert the first 50 bytes of a memoryview to a spaced hex string."""
+    sliced = mv[:50]
+    return ' '.join('{:02x}'.format(b & 0xFF) for b in sliced)
+
+#memoryview_to_hex_spaced(img)
+
+
+def capture():
+    width = 160
+    height = 120
+    image = lv.image(subwindow)
+    image_data = cam.capture()
+    memoryview_to_hex_spaced(image_data)
+    image_dsc = lv.image_dsc_t({
+        "header": {
+            "magic": lv.IMAGE_HEADER_MAGIC,
+            "w": width,
+            "h": height,
+            "stride": width * 2,
+            "cf": lv.COLOR_FORMAT.RGB565
+            },
+        'data_size': len(image_data),
+        'data': image_data
+    })
+    image.set_src(image_dsc)
+    image.align(lv.ALIGN.TOP_MID, 0, 0)
+    image.set_size(width, height)
+
+#for _ in range(10):
+#    capture()
+
+capture()