def test_open_image(filename):
""" Test the open_image helper """
# open_image() returns a ClipReader objet
clip = open_image(filename)
clip.show()
clip.clip(2, 2, 20, 16) # x,y, w, h
for y in range(clip.height):
print("--- Clip Line %i ---------" % y)
for x in range(clip.width):
print("(%i,%i) : %s" % (x, y, clip.read_pix())) #x,y, color
clip.close()
# spi = SPI(-1, baudrate=4000000, polarity=1, phase=0, sck=Pin(14), mosi=Pin(13), miso=Pin(12))
# Hardware SPI on Pyboard
spi = SPI(2) # MOSI=Y8, MISO=Y7, SCK=Y6, SS=Y5
spi.init(baudrate=2000000, phase=0, polarity=0) # low @ 2 MHz
# We must manage the SS signal ourself
ss = Pin(Pin.board.Y5, Pin.OUT)
# Just 6 LED-8x8RGB organized in 2 row of 3 columns each
# so 24x16 pixel display
modled = ModLedRGB(spi, ss, width=3, height=2)
# ClipReader opening the 24x91 pixels bitmap
modled.clear()
modled.show()
clip = open_image("olimex.bmp")
print("size: X*Y = %i * %i " % (clip.reader.width, clip.reader.height))
for y_scroll in range(91 - 16): # Nbr of pixels to scrool
#print( '=== Clipping @ y = %i ==========================' % y_scroll )
clip.clip(0, y_scroll, 24, 16)
#clip.show( )
#clip.clip( 0, y_scroll, 23, 16 ) # will reseek the cursor at the right position
# Copy from clipped image TO FrameBuffer
for line in range(clip.height): # 16 pixels height
for row in range(clip.width): # 23 pixels width
# Read a pixel color (r,g,b) --> transfert to 3 bit color --> draw pixel on frameBuffer
c = clip.read_pix()
modled.pixel(row, line, colorTo3Bit(c))
modled.show()
# PYBStick: S19=mosi, S23=sck, S26=/ss cs = Pin( 'S26', Pin.OUT, value=0 ) spi = SPI( 1 ) spi.init( polarity=0, phase=1 ) # Pico: GP7=mosi, GP6=sck, GP5=/ss #cs = Pin( 5, Pin.OUT, value=0 ) #spi = SPI( 0 ) #spi.init( polarity=0, phase=1 ) # PYBOARD: Y8=mosi, Y6=sck, Y5=/ss #cs = Pin( 'Y5', Pin.OUT, value=0 ) #spi = SPI( 2 ) #spi.init( polarity=0, phase=1 ) lcd = SPI_LCD12864( spi=spi, cs=cs ) # texte à X=10, Y=25, couleur=1 (trait) #lcd.text( "MicroPython !", 10, 25, 1 ) #lcd.update() def color_transform( rgb ): # transform the clipreader (rgb) color to the target FrameBuffer color (2 colors) return 0 if rgb==(0,0,0) else 1 reader = open_image( 'mpy.pbm' ) reader.clip(0,0,lcd.width,lcd.height) # Copy the clipped aread TO a target FrameBuffer (lcd) at is starting # position 0,0 for the given clipping width,height . reader.copy_to(lcd, 0,0, color_transform ) lcd.update()