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2 GraphLCD driver library
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9 The HD61830 driver supports LC displays that use the Hitachi HD61830
10 controller, connected to the parallel port of your PC.
15 The HD61830 driver supports the following connection on a parallel
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20 GND (18) GND (01) GND (Ground)
21 VDD (02) +5V (V Controller)
22 V0 (03) +5V..-15V (Contrast)
23 INIT (16) RS (04) (Register Select)
24 nAUTO (14) R/W (05) (Read 1/Write 0)
25 nSTRB (01) EN (06) (Enable)
26 D0 (02) D0 (07) (DataBit0)
27 D1 (03) D1 (08) (DataBit1)
28 D2 (04) D2 (09) (DataBit2)
29 D3 (05) D3 (10) (DataBit3)
30 D4 (06) D4 (11) (DataBit4)
31 D5 (07) D5 (12) (DataBit5)
32 D6 (08) D6 (13) (DataBit6)
33 D7 (09) D7 (14) (DataBit7)
34 nCS (15) GND (Chip Select)
37 nDO (18) (not connected)
39 Note: The pin numbering may vary with other displays.
42 Configuration Parameters
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44 The HD61830 driver supports the following parameters in config file:
47 Instead of using the direct output via port address (see Port), you
48 can use the parport device (/dev/parportX). The advantage over the
49 direct output via port address is that this works for non-root users
50 also. But it's a little bit slower. The modules ppdev.o, parport.o
51 and parport_pc.o must be loaded or compiled into the kernel.
54 Sets the port address of the parallel port. If this parameter is not
55 given, 0x378 is used. To use this direct output, the program that
56 uses the driver library has to be started with user 'root'.
59 Sets the horizontal size of the display. If this parameter is not
60 given, a default value of 240 pixels is used.
63 Sets the vertical size of the display. If this parameter is not
64 given, a default value of 128 pixels is used.
67 Rotates the display output by 180 degrees. This might be useful, if
68 the LCD is mounted upside-down.
69 Possible values: 'yes', 'no'
74 Possible values: 'yes', 'no'
78 To get a timing that is as accurate as possible, the drivers measure
79 the time for port commands (see: benchmark in syslog). You might
80 decrease or increase the time to wait after port commands with this
81 parameter. Normally, there is no need to change this parameter.
82 Possible values: -50 <= x <= 50
86 Normally, most of the drivers do not update the whole display, but
87 only the areas that have changed since last update. So it might be,
88 that some faulty pixels would stay a longer time. To avoid this, the
89 plugin makes a complete refresh from time to time. This parameter
90 defines how often a complete refresh will be done.
91 e.g.: A value of 5 means, that the plugin will make a complete
92 refresh on every 5th update.
93 A value of 0 completely disables complete refreshs.
94 Possible values: 0 <= x <= 50