Mercurial > templog
view py/lcd.py @ 523:21ce2b15128f
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author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 29 Jan 2015 22:52:26 +0800 |
parents | 0af7b38a1847 |
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#!/home/matt/templog/venv/bin/python import smbus import time import random import sys class LCD(object): COMMAND = 0x00 DATA = 0x40 def __init__(self): self.bus = smbus.SMBus(1) #self.address = 0b0111110 self.address = 0x3e def setup(self): time.sleep(0.01) cmds = """0x38 function set 0x39 function set 0x17 freq 0x78 # was 0x74 contrast, 101000 = 8 contrast (32 below), total 40 0x57 # was 0x54 # power/icon/contrast, 0110 = bon, c5 0x6a # was 0x6f follower , follow onr, rab 010 = 1.5 0x0c on/off""" for l in cmds.split('\n'): c = eval(l.split()[0]) self.cmd(c) # self.cmd(0x38) # self.cmd(0x39) # self.cmd(0x14) # self.cmd(0x78) # contrast # self.cmd(0x57) # power/icon/contrast # self.cmd(0x6f) # follower # self.cmd(0x0c) # self.cmd(0x01) # self.cmd(0x04) def put(self, pos, word): addr = 0b10000000 + (pos % 16) + (pos>=16)*40 self.cmd(addr) for char in word: self.data(ord(char)) def write(self, a, b): self.bus.write_byte_data(self.address, a, b) time.sleep(0.0001) def cmd(self, cmd): self.write(self.COMMAND, cmd) def data(self, data): self.write(self.DATA, data) l = LCD() l.setup() l.put(0, 'a') l.put(1, 'b') l.put(4, 'b') words = [word.strip() for word in file('/usr/share/dict/words', 'r')] random.shuffle(words) #words = file(sys.argv[1], 'r').read().split() pos = 0 last = '' for word in words: word = (word + ' '*16)[:16] #pos = (pos + 16) % 32 #word = random.sample(words, 1)[0][:16] + ' '*16 #char = chr(int(random.random() * 26) + ord('a')) l.put(0, last) l.put(16, word) last = word time.sleep(0.3)