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'''Generates the byte array for setting the global brightness.'''
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def CMD_Set_BC(brightness):
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barray = bytearray.fromhex('7E 00 02 0A')
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barray.extend([brightness])
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barray.extend([Calculate_Checksum(barray)])
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return barray
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'''Generates the byte array for clearing all pixels.'''
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def CMD_Clear():
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return bytearray.fromhex('7E 00 01 0B F4')
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'''Generates the command for setting a specific pixel.'''
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def CMD_Set_Pixel(layer, row, column, r, g, b):
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barray = bytearray.fromhex('7E 00 07 10')
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barray.extend([layer,row,column,r,g,b,])
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barray.extend([Calculate_Checksum(barray)])
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return barray
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'''Generates the command for setting an entire layer.'''
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def CMD_Set_Layer(layer, leds):
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barray = bytearray.fromhex('7E 01 22 11')
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barray.extend([layer])
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barray.extend(leds)
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barray.extend([Calculate_Checksum(barray)])
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return barray
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'''Generates the command for setting the rotating overlay text.'''
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def CMD_Start_Text(r, g, b, string):
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length = len(string) + 4
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barray = bytearray.fromhex('7E 00')
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barray.extend([length, 0x20, r, g, b])
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barray.extend(string.encode())
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barray.extend([Calculate_Checksum(barray)])
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return barray
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'''Generates the command for stopping the rotating overlay text.'''
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def CMD_Stop_Text():
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return bytes.fromhex('7E 00 01 21 DE')
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def Calculate_Checksum(barray):
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s = 0
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for entry in range(3,len(barray)):
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s += barray[entry]
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return 255 - (s & 0xFF)
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