Mercurial > templog
annotate py/lcd.py @ 542:30628aa50a10
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| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Thu, 21 May 2015 00:00:10 +0800 |
| parents | 0af7b38a1847 |
| children |
| rev | line source |
|---|---|
| 450 | 1 #!/home/matt/templog/venv/bin/python |
| 2 | |
| 3 import smbus | |
| 4 import time | |
| 5 import random | |
| 6 import sys | |
| 7 | |
| 8 class LCD(object): | |
| 9 | |
| 10 COMMAND = 0x00 | |
| 11 DATA = 0x40 | |
| 12 | |
| 13 def __init__(self): | |
| 14 self.bus = smbus.SMBus(1) | |
| 15 #self.address = 0b0111110 | |
| 16 self.address = 0x3e | |
| 17 | |
| 18 def setup(self): | |
| 19 time.sleep(0.01) | |
| 20 cmds = """0x38 function set | |
| 21 0x39 function set | |
| 22 0x17 freq | |
| 23 0x78 # was 0x74 contrast, 101000 = 8 contrast (32 below), total 40 | |
| 24 0x57 # was 0x54 # power/icon/contrast, 0110 = bon, c5 | |
| 25 0x6a # was 0x6f follower , follow onr, rab 010 = 1.5 | |
| 26 0x0c on/off""" | |
| 27 for l in cmds.split('\n'): | |
| 28 c = eval(l.split()[0]) | |
| 29 self.cmd(c) | |
| 30 | |
| 31 # self.cmd(0x38) | |
| 32 # self.cmd(0x39) | |
| 33 # self.cmd(0x14) | |
| 34 # self.cmd(0x78) # contrast | |
| 35 # self.cmd(0x57) # power/icon/contrast | |
| 36 # self.cmd(0x6f) # follower | |
| 37 # self.cmd(0x0c) | |
| 38 # self.cmd(0x01) | |
| 39 # self.cmd(0x04) | |
| 40 | |
| 41 def put(self, pos, word): | |
| 42 addr = 0b10000000 + (pos % 16) + (pos>=16)*40 | |
| 43 self.cmd(addr) | |
| 44 for char in word: | |
| 45 self.data(ord(char)) | |
| 46 | |
| 47 def write(self, a, b): | |
| 48 self.bus.write_byte_data(self.address, a, b) | |
| 49 time.sleep(0.0001) | |
| 50 | |
| 51 def cmd(self, cmd): | |
| 52 self.write(self.COMMAND, cmd) | |
| 53 | |
| 54 def data(self, data): | |
| 55 self.write(self.DATA, data) | |
| 56 | |
| 57 l = LCD() | |
| 58 l.setup() | |
| 59 l.put(0, 'a') | |
| 60 l.put(1, 'b') | |
| 61 l.put(4, 'b') | |
| 62 | |
|
453
0af7b38a1847
back to random words on the lcd
Matt Johnston <matt@ucc.asn.au>
parents:
450
diff
changeset
|
63 words = [word.strip() for word in file('/usr/share/dict/words', 'r')] |
|
0af7b38a1847
back to random words on the lcd
Matt Johnston <matt@ucc.asn.au>
parents:
450
diff
changeset
|
64 random.shuffle(words) |
|
0af7b38a1847
back to random words on the lcd
Matt Johnston <matt@ucc.asn.au>
parents:
450
diff
changeset
|
65 #words = file(sys.argv[1], 'r').read().split() |
| 450 | 66 |
| 67 pos = 0 | |
| 68 last = '' | |
| 69 for word in words: | |
| 70 word = (word + ' '*16)[:16] | |
| 71 #pos = (pos + 16) % 32 | |
| 72 #word = random.sample(words, 1)[0][:16] + ' '*16 | |
| 73 #char = chr(int(random.random() * 26) + ord('a')) | |
| 74 l.put(0, last) | |
| 75 l.put(16, word) | |
| 76 last = word | |
|
453
0af7b38a1847
back to random words on the lcd
Matt Johnston <matt@ucc.asn.au>
parents:
450
diff
changeset
|
77 time.sleep(0.3) |