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Thomas Farstrike
163 lines
4.3 KiB
Python
163 lines
4.3 KiB
Python
appscreen = lv.screen_active()
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#define PWDN_GPIO_NUM 17 //power down is not used
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#define RESET_GPIO_NUM -1 //software reset will be performed
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#define XCLK_GPIO_NUM 8
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#define SIOD_GPIO_NUM 21
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#define SIOC_GPIO_NUM 16
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#define Y9_GPIO_NUM 2
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#define Y8_GPIO_NUM 7
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#define Y7_GPIO_NUM 10
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#define Y6_GPIO_NUM 14
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#define Y5_GPIO_NUM 11
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#define Y4_GPIO_NUM 15
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#define Y3_GPIO_NUM 13
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#define Y2_GPIO_NUM 12
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#define VSYNC_GPIO_NUM 6
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#define HREF_GPIO_NUM 4
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#define PCLK_GPIO_NUM 9
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#define CAM_LEDC_TIMER LEDC_TIMER_1
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#define CAM_LEDC_CHANNEL LEDC_CHANNEL_0
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# OV5640 I2C address
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#sensor_addr = 0x3C
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#reg_addr = 0x4300
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#reg_value = 0x6F # RGB565 (bit[6]=1) + sequence 0xF (bits[3:0]=0xF)
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#from machine import I2C, Pin
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#i2c = I2C(scl=Pin(16), sda=Pin(21))
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#i2c.readfrom_mem(0x3C, 0x4300, 1)
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#i2c.writeto_mem(sensor_addr, reg_addr, bytes([reg_value]))
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#width = 480
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#height = 320
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#width = 320
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#height = 240
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#width = 120
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#height = 160
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keepgoing = True
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width = 240
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height = 240
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cont = lv.obj(appscreen)
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cont.set_style_pad_all(0, 0)
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cont.set_style_border_width(0, 0)
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cont.set_size(lv.pct(100), lv.pct(100))
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cont.set_scrollbar_mode(lv.SCROLLBAR_MODE.OFF)
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snap_button = lv.button(cont)
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snap_button.set_size(60, 60)
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snap_button.align(lv.ALIGN.RIGHT_MID, 0, -20)
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snap_label = lv.label(snap_button)
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snap_label.set_text(lv.SYMBOL.OK)
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snap_label.center()
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def snap_button_click(e):
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print("Picture taken!")
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# TODO: keep it on-screen for a while, or save it to storage, or show it in miniature
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snap_button.add_event_cb(snap_button_click,lv.EVENT.CLICKED,None)
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close_button = lv.button(cont)
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close_button.set_size(40,40)
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close_button.align(lv.ALIGN.TOP_RIGHT, 0, 0)
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close_label = lv.label(close_button)
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close_label.set_text(lv.SYMBOL.CLOSE)
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close_label.center()
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def close_button_click(e):
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global keepgoing
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print("Closing camera!")
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keepgoing = False
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close_button.add_event_cb(close_button_click,lv.EVENT.CLICKED,None)
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from camera import Camera, GrabMode, PixelFormat, FrameSize, GainCeiling
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cam = Camera(
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data_pins=[12,13,15,11,14,10,7,2],
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vsync_pin=6,
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href_pin=4,
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sda_pin=21,
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scl_pin=16,
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pclk_pin=9,
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xclk_pin=8,
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xclk_freq=20000000,
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powerdown_pin=-1,
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reset_pin=-1,
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pixel_format=PixelFormat.RGB565,
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frame_size=FrameSize.R240X240,
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grab_mode=GrabMode.LATEST
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)
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#cam.init() automatically done when creating the Camera()
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#cam.reconfigure(frame_size=FrameSize.HVGA)
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#frame_size=FrameSize.HVGA, # 480x320
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#frame_size=FrameSize.QVGA, # 320x240
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#frame_size=FrameSize.QQVGA # 160x120
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cam.set_vflip(True)
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# Initialize LVGL image widget
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image = lv.image(cont)
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image.align(lv.ALIGN.LEFT_MID, 0, 0)
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image.set_rotation(900)
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# Create image descriptor once
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image_dsc = lv.image_dsc_t({
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"header": {
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"magic": lv.IMAGE_HEADER_MAGIC,
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"w": width,
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"h": height,
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"stride": width * 2,
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"cf": lv.COLOR_FORMAT.RGB565
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},
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'data_size': width * height * 2,
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'data': None # Will be updated per frame
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})
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# Set initial image source (optional, can be set in try_capture)
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image.set_src(image_dsc)
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# Variable to hold the current memoryview to prevent garbage collection
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current_cam_buffer = None
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def try_capture():
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global current_cam_buffer
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if cam.frame_available():
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# Get new memoryview from camera
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new_cam_buffer = cam.capture() # Returns memoryview
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# Verify buffer size
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#if len(new_cam_buffer) != width * height * 2:
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# print("Invalid buffer size:", len(new_cam_buffer))
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# cam.free_buffer()
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# return
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# Update image descriptor with new memoryview
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image_dsc.data = new_cam_buffer
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# Set image source to update LVGL (implicitly invalidates widget)
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image.set_src(image_dsc)
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#image.invalidate() #does not work
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# Free the previous buffer (if any) after setting new data
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if current_cam_buffer is not None:
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cam.free_buffer() # Free the old buffer
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current_cam_buffer = new_cam_buffer # Store new buffer reference
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# Initial capture
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try_capture()
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import time
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while appscreen == lv.screen_active() and keepgoing:
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try_capture()
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time.sleep_ms(100) # Allow for the MicroPython REPL to still work. Reducing it doesn't seem to affect the on-display FPS.
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print("App backgrounded, deinitializing camera...")
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cam.deinit()
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show_launcher()
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