add image examples

micropython/examples/inky_frame/image_gallery/image_gallery.py

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+# An offline image gallery that switches between five jpg images
+# Copy them into your Pico's flash using Thonny.
+# Sample images are taken by the Webb Space Telescope
+# Credit: NASA and the Space Telescope Science Institute (STScI).
+# More images and info @ https://webbtelescope.org/
+# If you want to use your own images they must be 600 x 448 pixels or smaller
+# and saved as *non-progressive* jpgs
+
+from pimoroni import ShiftRegister
+from picographics import PicoGraphics, DISPLAY_INKY_FRAME
+from machine import Pin
+import jpegdec
+
+# you can change your file names here
+IMAGE_A = "jwst1.jpg"
+IMAGE_B = "jwst2.jpg"
+IMAGE_C = "jwst3.jpg"
+IMAGE_D = "jwst4.jpg"
+IMAGE_E = "jwst5.jpg"
+
+# set up the display
+display = PicoGraphics(display=DISPLAY_INKY_FRAME)
+
+# Inky Frame uses a shift register to read the buttons
+SR_CLOCK = 8
+SR_LATCH = 9
+SR_OUT = 10
+
+sr = ShiftRegister(SR_CLOCK, SR_LATCH, SR_OUT)
+
+# set up the button LEDs
+button_a_led = Pin(11, Pin.OUT)
+button_b_led = Pin(12, Pin.OUT)
+button_c_led = Pin(13, Pin.OUT)
+button_d_led = Pin(14, Pin.OUT)
+button_e_led = Pin(15, Pin.OUT)
+
+# and the activity LED
+activity_led = Pin(6, Pin.OUT)
+
+# set up and enable vsys hold so we don't go to sleep
+HOLD_VSYS_EN_PIN = 2
+
+hold_vsys_en_pin = Pin(HOLD_VSYS_EN_PIN, Pin.OUT)
+hold_vsys_en_pin.value(True)
+
+# Create a new JPEG decoder for our PicoGraphics
+j = jpegdec.JPEG(display)
+
+# setup
+activity_led.on()
+# update the image on Inky every time it's powered up
+# comment these lines out if running on battery power
+# button_a_led.on()
+# display_image(IMAGE_A)
+
+
+def display_image(filename):
+
+    # Open the JPEG file
+    j.open_file(filename)
+
+    # Decode the JPEG
+    j.decode(0, 0, jpegdec.JPEG_SCALE_FULL)
+
+    # Display the result
+    display.update()
+
+
+while True:
+    button_a_led.off()
+    button_b_led.off()
+    button_c_led.off()
+    button_d_led.off()
+    button_e_led.off()
+
+    # read the shift register
+    # we can tell which button has been pressed by checking if a specific bit is 0 or 1
+    result = sr.read()
+    button_a = sr[7]
+    button_b = sr[6]
+    button_c = sr[5]
+    button_d = sr[4]
+    button_e = sr[3]
+
+    # light up the activity LED when Inky is awake
+    activity_led.on()
+
+    if button_a == 1:
+        button_a_led.on()
+        display_image(IMAGE_A)
+    elif button_b == 1:
+        button_b_led.on()
+        display_image(IMAGE_B)
+    elif button_c == 1:
+        button_c_led.on()
+        display_image(IMAGE_C)
+    elif button_d == 1:
+        button_d_led.on()
+        display_image(IMAGE_D)
+    elif button_e == 1:
+        button_e_led.on()
+        display_image(IMAGE_E)
+
+    # Go to sleep if on battery power
+    activity_led.off()
+    hold_vsys_en_pin.init(Pin.IN)

micropython/examples/inky_frame/image_gallery/image_gallery_sd.py

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+# An offline image gallery that switches between five jpg images
+# on your SD card (copy them across by plugging your SD into a computer).
+# Sample images are taken by the Webb Space Telescope
+# Credit: NASA and the Space Telescope Science Institute (STScI).
+# More images and info @ https://webbtelescope.org/
+# If you want to use your own images they must be 600 x 448 pixels or smaller
+# and saved as *non-progressive* jpgs
+
+from pimoroni import ShiftRegister
+from picographics import PicoGraphics, DISPLAY_INKY_FRAME
+from machine import Pin, SPI
+import jpegdec
+import sdcard
+import uos
+
+# you can change your file names here
+IMAGE_A = "sd/jwst1.jpg"
+IMAGE_B = "sd/jwst2.jpg"
+IMAGE_C = "sd/jwst3.jpg"
+IMAGE_D = "sd/jwst4.jpg"
+IMAGE_E = "sd/jwst5.jpg"
+
+# set up the display
+display = PicoGraphics(display=DISPLAY_INKY_FRAME)
+
+# Inky Frame uses a shift register to read the buttons
+SR_CLOCK = 8
+SR_LATCH = 9
+SR_OUT = 10
+
+sr = ShiftRegister(SR_CLOCK, SR_LATCH, SR_OUT)
+
+# set up the button LEDs
+button_a_led = Pin(11, Pin.OUT)
+button_b_led = Pin(12, Pin.OUT)
+button_c_led = Pin(13, Pin.OUT)
+button_d_led = Pin(14, Pin.OUT)
+button_e_led = Pin(15, Pin.OUT)
+
+# and the activity LED
+activity_led = Pin(6, Pin.OUT)
+
+# set up the SD card
+sd_spi = SPI(0, sck=Pin(18, Pin.OUT), mosi=Pin(19, Pin.OUT), miso=Pin(16, Pin.OUT))
+sd = sdcard.SDCard(sd_spi, Pin(22))
+uos.mount(sd, "/sd")
+
+# set up and enable vsys hold so we don't go to sleep
+HOLD_VSYS_EN_PIN = 2
+
+hold_vsys_en_pin = Pin(HOLD_VSYS_EN_PIN, Pin.OUT)
+hold_vsys_en_pin.value(True)
+
+# Create a new JPEG decoder for our PicoGraphics
+j = jpegdec.JPEG(display)
+
+# setup
+activity_led.on()
+# update the image on Inky every time it's powered up
+# comment these lines out if running on battery power
+# button_a_led.on()
+# display_image(IMAGE_A)
+
+
+def display_image(filename):
+
+    # Open the JPEG file
+    j.open_file(filename)
+
+    # Decode the JPEG
+    j.decode(0, 0, jpegdec.JPEG_SCALE_FULL)
+
+    # Display the result
+    display.update()
+
+
+while True:
+    button_a_led.off()
+    button_b_led.off()
+    button_c_led.off()
+    button_d_led.off()
+    button_e_led.off()
+
+    # read the shift register
+    # we can tell which button has been pressed by checking if a specific bit is 0 or 1
+    result = sr.read()
+    button_a = sr[7]
+    button_b = sr[6]
+    button_c = sr[5]
+    button_d = sr[4]
+    button_e = sr[3]
+
+    # light up the activity LED when Inky is awake
+    activity_led.on()
+
+    if button_a == 1:
+        button_a_led.on()
+        display_image(IMAGE_A)
+    elif button_b == 1:
+        button_b_led.on()
+        display_image(IMAGE_B)
+    elif button_c == 1:
+        button_c_led.on()
+        display_image(IMAGE_C)
+    elif button_d == 1:
+        button_d_led.on()
+        display_image(IMAGE_D)
+    elif button_e == 1:
+        button_e_led.on()
+        display_image(IMAGE_E)
+
+    # go to sleep if on battery power
+    activity_led.off()
+    hold_vsys_en_pin.init(Pin.IN)