1 ===================================
2 cfag12864b LCD Driver Documentation
3 ===================================
4
5 :License: GPLv2
6 :Author & Maintainer: Miguel Ojeda <ojeda@ker
7 :Date: 2006-10-27
8
9
10
11 .. INDEX
12
13 1. DRIVER INFORMATION
14 2. DEVICE INFORMATION
15 3. WIRING
16 4. USERSPACE PROGRAMMING
17
18 1. Driver Information
19 ---------------------
20
21 This driver supports a cfag12864b LCD.
22
23
24 2. Device Information
25 ---------------------
26
27 :Manufacturer: Crystalfontz
28 :Device Name: Crystalfontz 12864b LCD Series
29 :Device Code: cfag12864b
30 :Webpage: http://www.crystalfontz.com
31 :Device Webpage: http://www.crystalfontz.com/p
32 :Type: LCD (Liquid Crystal Display)
33 :Width: 128
34 :Height: 64
35 :Colors: 2 (B/N)
36 :Controller: ks0108
37 :Controllers: 2
38 :Pages: 8 each controller
39 :Addresses: 64 each page
40 :Data size: 1 byte each address
41 :Memory size: 2 * 8 * 64 * 1 = 1024 bytes =
42
43
44 3. Wiring
45 ---------
46
47 The cfag12864b LCD Series don't have official
48
49 The common wiring is done to the parallel port
50
51 Parallel Port cfag1
52
53 Name Pin# Pin#
54
55 Strobe ( 1)------------------------------(17
56 Data 0 ( 2)------------------------------( 4
57 Data 1 ( 3)------------------------------( 5
58 Data 2 ( 4)------------------------------( 6
59 Data 3 ( 5)------------------------------( 7
60 Data 4 ( 6)------------------------------( 8
61 Data 5 ( 7)------------------------------( 9
62 Data 6 ( 8)------------------------------(10
63 Data 7 ( 9)------------------------------(11
64 (10) [+5v]---( 1
65 (11) [GND]---( 2
66 (12) [+5v]---(14
67 (13) [GND]---(15
68 Line (14)------------------------------(13
69 (15)
70 Init (16)------------------------------(12
71 Select (17)------------------------------(16
72 Ground (18)---[GND] [+5v]---(19
73 Ground (19)---[GND]
74 Ground (20)---[GND] E A
75 Ground (21)---[GND] [GND]---[P1]---(18
76 Ground (22)---[GND] |
77 Ground (23)---[GND] ---- S ------( 3
78 Ground (24)---[GND] | |
79 Ground (25)---[GND] [GND]---[P2]---[R]---(20
80
81
82 4. Userspace Programming
83 ------------------------
84
85 The cfag12864bfb describes a framebuffer devic
86
87 It has a size of 1024 bytes = 1 Kbyte.
88 Each bit represents one pixel. If the bit is h
89 turn on. If the pixel is low, the pixel will t
90
91 You can use the framebuffer as a file: fopen,
92 Although the LCD won't get updated until the n
93
94 Also, you can mmap the framebuffer: open & mma
95 which is the best option for most uses.
96
97 Check samples/auxdisplay/cfag12864b-example.c
98 for a real working userspace complete program
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