152 lines
4.5 KiB
Python
152 lines
4.5 KiB
Python
import colorsys
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import time
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import numpy
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import RPi.GPIO as GPIO
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class UnicornHat(object):
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def __init__(self, width, height, rotation_offset = 0):
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self.PIN_CLK = 11
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##################################
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# GPIO Pins for the actual signal. The other ones are for signal clocks and resets.
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self.PINS_DAT = [10, 22]
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##################################
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self.PIN_CS = 8
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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GPIO.setup(self.PIN_CS, GPIO.OUT, initial=GPIO.HIGH)
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GPIO.setup(self.PIN_CLK, GPIO.OUT, initial=GPIO.LOW)
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GPIO.setup(self.PINS_DAT, GPIO.OUT, initial=GPIO.LOW)
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self.SOF = 0x72
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self.DELAY = 1.0/120
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self.WIDTH = width #32
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self.HEIGHT = height #16
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self.rotation = 1
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self.brightness = 1
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self.buffer = numpy.zeros((self.HEIGHT,self.WIDTH,3), dtype=int)
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self.reset_clock()
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def reset_clock(self):
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GPIO.output(self.PIN_CS, GPIO.LOW)
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time.sleep(0.00001)
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GPIO.output(self.PIN_CS, GPIO.HIGH)
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def spi_write(self, buf1, buf2):
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GPIO.output(self.PIN_CS, GPIO.LOW)
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self.spi_write_byte(self.SOF, self.SOF)
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for x in range(len(buf1)):
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b1, b2= buf1[x], buf2[x]
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self.spi_write_byte(b1, b2)
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GPIO.output(self.PIN_CS, GPIO.HIGH)
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def spi_write_byte(self, b1, b2):
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for x in range(8):
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GPIO.output(self.PINS_DAT[0], b1 & 0b10000000)
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GPIO.output(self.PINS_DAT[1], b2 & 0b10000000)
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GPIO.output(self.PIN_CLK, GPIO.HIGH)
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b1 <<= 1
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b2 <<= 1
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#time.sleep(0.00000001)
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GPIO.output(self.PIN_CLK, GPIO.LOW)
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def set_brightness(self, b):
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"""Set the display brightness between 0.0 and 1.0.
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:param b: Brightness from 0.0 to 1.0 (default 1)
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"""
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self.brightness = b
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def rotation(self, r):
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"""Set the display rotation in degrees.
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Actual rotation will be snapped to the nearest 90 degrees.
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"""
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self.rotation = int(round(r/90.0))
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def get_rotation(self):
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"""Returns the display rotation in degrees."""
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return self.rotation * 90
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def set_all(self, r, g, b):
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self.buffer[:] = r, g, b
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def set_pixel(self, x, y, r, g, b):
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"""Set a single pixel to RGB colour.
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:param x: Horizontal position from 0 to width
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:param y: Vertical position from 0 to height
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:param r: Amount of red from 0 to 255
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:param g: Amount of green from 0 to 255
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:param b: Amount of blue from 0 to 255
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"""
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self.buffer[y][x] = r, g, b
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def set_matrix(self, matrix):
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"""Sets a height x width matrix directly"""
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self.reset_clock()
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self.buffer = matrix
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self.show()
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def set_pixel_hsv(self, x, y, h, s=1.0, v=1.0):
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"""set a single pixel to a colour using HSV.
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:param x: Horizontal position from 0 to 15
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:param y: Veritcal position from 0 to 15
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:param h: Hue from 0.0 to 1.0 ( IE: degrees around hue wheel/360.0 )
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:param s: Saturation from 0.0 to 1.0
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:param v: Value (also known as brightness) from 0.0 to 1.0
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"""
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r, g, b = [int(n*255) for n in colorsys.hsv_to_rgb(h, s, v)]
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self.set_pixel(x, y, r, g, b)
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def get_pixel(self, x, y):
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return tuple(self.buffer[x][y])
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def shade_pixels(self, shader):
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for x in range(self.WIDTH):
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for y in range(self.HEIGHT):
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r, g, b = shader(x, y)
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self.set_pixel(x, y, r, g, b)
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def get_pixels(self):
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return self.buffer
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def get_shape(self):
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"""Return the shape (width, height) of the display."""
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return self.WIDTH, self.HEIGHT
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def clear(self):
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"""Clear the buffer."""
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self.buffer.fill(0)
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def off(self):
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"""Clear the buffer and immediately update Unicorn HAT HD.
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Turns off all pixels.
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"""
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self.clear()
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self.show()
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def show(self):
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"""Output the contents of the buffer to Unicorn HAT HD."""
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##########################################################
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## Change to desire
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buff2 = numpy.rot90(self.buffer[:self.HEIGHT,:16],3)
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buff1 = numpy.rot90(self.buffer[:self.HEIGHT,16:32],1)
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##########################################################
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buff1, buff2 = [(x.reshape(768) * self.brightness).astype(numpy.uint8).tolist() for x in (buff1, buff2)]
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self.spi_write(buff1, buff2)
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time.sleep(self.DELAY)
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