|
1 --------------------------------------------------------------------- |
|
2 GraphLCD driver library |
|
3 |
|
4 The serdisp driver |
|
5 --------------------------------------------------------------------- |
|
6 |
|
7 Description |
|
8 ----------- |
|
9 The serdisp driver supports LC displays that are supported by |
|
10 serdisplib (http://serdisplib.sourceforge.net). |
|
11 |
|
12 |
|
13 Configuration Parameters |
|
14 ------------------------ |
|
15 The serdisp driver supports the following parameters in config file: |
|
16 |
|
17 Controller |
|
18 Select the controller your LCD uses named like in serdisplib. |
|
19 Possible values: See README in serdisplib package |
|
20 |
|
21 Device |
|
22 Instead of using the direct output via port address (see Port), you |
|
23 can use the parport device (/dev/parportX). The advantage over the |
|
24 direct output via port address is that this works for non-root users |
|
25 also. But it's a little bit slower. The modules ppdev.o, parport.o |
|
26 and parport_pc.o must be loaded or compiled into the kernel. |
|
27 |
|
28 Port |
|
29 Sets the port address of the parallel port. If this parameter is not |
|
30 given, 0x378 is used. To use this direct output, the program that |
|
31 uses the driver library has to be started with user 'root'. |
|
32 |
|
33 Width |
|
34 Sets the horizontal size of the display. If this parameter is not |
|
35 given, a default value according to the selected controller is used. |
|
36 |
|
37 Height |
|
38 Sets the vertical size of the display. If this parameter is not |
|
39 given, a default value according to the selected controller is used. |
|
40 |
|
41 UpsideDown |
|
42 Rotates the display output by 180 degrees. This might be useful, if |
|
43 the LCD is mounted upside-down. |
|
44 Possible values: 'yes', 'no' |
|
45 Default value: 'no' |
|
46 |
|
47 Invert |
|
48 Inverts the display. |
|
49 Possible values: 'yes', 'no' |
|
50 Default value: 'no' |
|
51 |
|
52 Contrast |
|
53 Sets the contrast of your display. |
|
54 Possible values: 0 <= x <= 10 |
|
55 Default value: 5 |
|
56 |
|
57 Backlight |
|
58 Switches the backlight of your display on and off. |
|
59 Possible values: 'yes', 'no' |
|
60 Default value: 'yes' |
|
61 |