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1 #!/home/matt/templog/venv/bin/python |
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2 |
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3 import smbus |
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4 import time |
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5 import random |
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6 import sys |
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7 |
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8 class LCD(object): |
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9 |
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10 COMMAND = 0x00 |
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11 DATA = 0x40 |
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12 |
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13 def __init__(self): |
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14 self.bus = smbus.SMBus(1) |
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15 #self.address = 0b0111110 |
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16 self.address = 0x3e |
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17 |
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18 def setup(self): |
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19 time.sleep(0.01) |
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20 cmds = """0x38 function set |
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21 0x39 function set |
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22 0x17 freq |
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23 0x78 # was 0x74 contrast, 101000 = 8 contrast (32 below), total 40 |
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24 0x57 # was 0x54 # power/icon/contrast, 0110 = bon, c5 |
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25 0x6a # was 0x6f follower , follow onr, rab 010 = 1.5 |
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26 0x0c on/off""" |
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27 for l in cmds.split('\n'): |
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28 c = eval(l.split()[0]) |
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29 self.cmd(c) |
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30 |
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31 # self.cmd(0x38) |
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32 # self.cmd(0x39) |
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33 # self.cmd(0x14) |
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34 # self.cmd(0x78) # contrast |
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35 # self.cmd(0x57) # power/icon/contrast |
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36 # self.cmd(0x6f) # follower |
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37 # self.cmd(0x0c) |
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38 # self.cmd(0x01) |
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39 # self.cmd(0x04) |
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40 |
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41 def put(self, pos, word): |
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42 addr = 0b10000000 + (pos % 16) + (pos>=16)*40 |
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43 self.cmd(addr) |
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44 for char in word: |
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45 self.data(ord(char)) |
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46 |
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47 def write(self, a, b): |
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48 self.bus.write_byte_data(self.address, a, b) |
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49 time.sleep(0.0001) |
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50 |
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51 def cmd(self, cmd): |
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52 self.write(self.COMMAND, cmd) |
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53 |
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54 def data(self, data): |
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55 self.write(self.DATA, data) |
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56 |
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57 l = LCD() |
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58 l.setup() |
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59 l.put(0, 'a') |
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60 l.put(1, 'b') |
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61 l.put(4, 'b') |
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62 |
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63 #words = [word.strip() for word in file('/usr/share/dict/words', 'r')] |
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64 #random.shuffle(words) |
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65 words = file(sys.argv[1], 'r').read().split() |
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66 |
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67 pos = 0 |
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68 last = '' |
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69 for word in words: |
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70 word = (word + ' '*16)[:16] |
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71 #pos = (pos + 16) % 32 |
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72 #word = random.sample(words, 1)[0][:16] + ' '*16 |
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73 #char = chr(int(random.random() * 26) + ord('a')) |
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74 l.put(0, last) |
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75 l.put(16, word) |
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76 last = word |
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77 time.sleep(0.1) |
