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ST7789 using array instead of numpy #368

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May 23, 2023
Merged

ST7789 using array instead of numpy #368

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11 changes: 5 additions & 6 deletions src/seedsigner/hardware/ST7789.py
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import spidev
import RPi.GPIO as GPIO
import time
import numpy as np
import array



Expand Down Expand Up @@ -153,11 +153,10 @@ def ShowImage(self,Image,Xstart,Ystart):
if imwidth != self.width or imheight != self.height:
raise ValueError('Image must be same dimensions as display \
({0}x{1}).' .format(self.width, self.height))
img = np.asarray(Image)
pix = np.zeros((self.width,self.height,2), dtype = np.uint8)
pix[...,[0]] = np.add(np.bitwise_and(img[...,[0]],0xF8),np.right_shift(img[...,[1]],5))
pix[...,[1]] = np.add(np.bitwise_and(np.left_shift(img[...,[1]],3),0xE0),np.right_shift(img[...,[2]],3))
pix = pix.flatten().tolist()
# 24-bit RGB-8:8:8 becomes 16-bit BGR-5:6:5 plus endianness toggle.
arr = array.array("H", Image.convert("BGR;16").tobytes())
arr.byteswap()
pix = arr.tobytes()
self.SetWindows ( 0, 0, self.width, self.height)
GPIO.output(self._dc,GPIO.HIGH)
for i in range(0,len(pix),4096):
Expand Down