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1 --------------------------------------------------------------------- |
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2 GraphLCD driver library |
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3 |
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4 The GU140X32F driver |
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5 --------------------------------------------------------------------- |
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6 |
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7 Description |
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8 ----------- |
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9 The GU140X32F driver supports Noritake GU140x32-F7806 VFD displays. |
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10 The VFD is operating in its 8 bit-mode connected to a PC's parallel |
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11 port. |
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12 |
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13 |
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14 Wirings |
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15 ------- |
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16 The GU140x32F driver supports the following connections on a parallel |
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17 port: |
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18 - Standard |
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19 - Windows |
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20 |
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21 Standard wiring: |
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22 |
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23 printerport LCD other |
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24 ----------- ---------- ---------- |
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25 GND (01) GND (Ground) |
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26 VCC (02) VCC (+5VDC 500mA) |
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27 NC (03) |
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28 nSTRB (01) RS (04) (Register Select) |
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29 nAUTO (14) RW (05) (Read/Write) |
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30 INIT (16) EN (06) (Chip Enable) |
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31 D0 (02) D0 (07) (Data Bit 0) |
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32 D1 (03) D1 (08) (Data Bit 1) |
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33 D2 (04) D2 (09) (Data Bit 2) |
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34 D3 (05) D3 (10) (Data Bit 3) |
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35 D4 (06) D4 (11) (Data Bit 4) |
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36 D5 (07) D5 (12) (Data Bit 5) |
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37 D6 (08) D6 (13) (Data Bit 6) |
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38 D7 (09) D7 (14) (Data Bit 7) |
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39 |
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40 Windows wiring: |
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41 |
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42 printerport LCD other |
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43 ----------- ---------- ---------- |
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44 GND (01) GND (Ground) |
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45 VCC (02) VCC (+5VDC 500mA) |
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46 NC (03) |
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47 INIT (16) RS (04) (Register Select) |
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48 nAUTO (14) RW (05) (Read/Write) |
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49 nSTRB (01) EN (06) (Chip Enable) |
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50 D0 (02) D0 (07) (Data Bit 0) |
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51 D1 (03) D1 (08) (Data Bit 1) |
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52 D2 (04) D2 (09) (Data Bit 2) |
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53 D3 (05) D3 (10) (Data Bit 3) |
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54 D4 (06) D4 (11) (Data Bit 4) |
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55 D5 (07) D5 (12) (Data Bit 5) |
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56 D6 (08) D6 (13) (Data Bit 6) |
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57 D7 (09) D7 (14) (Data Bit 7) |
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58 |
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59 Note: The pin numbering may vary with other displays. |
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60 |
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61 |
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62 Configuration Parameters |
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63 ------------------------ |
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64 The GU140x32F driver supports the following parameters in config file: |
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65 |
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66 Device |
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67 Instead of using the direct output via port address (see Port), you |
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68 can use the parport device (/dev/parportX). The advantage over the |
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69 direct output via port address is that this works for non-root users |
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70 also. But it's a little bit slower. The modules ppdev.o, parport.o |
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71 and parport_pc.o must be loaded or compiled into the kernel. |
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72 |
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73 Port |
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74 Sets the port address of the parallel port. If this parameter is not |
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75 given, 0x378 is used. To use this direct output, the program that |
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76 uses the driver library has to be started with user 'root'. |
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77 |
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78 Width |
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79 Sets the horizontal size of the display. If this parameter is not |
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80 given, a default value of 140 pixels is used. |
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81 |
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82 Height |
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83 Sets the vertical size of the display. If this parameter is not |
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84 given, a default value of 32 pixels is used. |
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85 |
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86 UpsideDown |
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87 Rotates the display output by 180 degrees. This might be useful, if |
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88 the LCD is mounted upside-down. |
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89 Possible values: 'yes', 'no' |
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90 Default value: 'no' |
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91 |
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92 Invert |
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93 Inverts the display. |
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94 Possible values: 'yes', 'no' |
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95 Default value: 'no' |
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96 |
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97 Brightness |
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98 Sets the brightness of your display's backlight. |
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99 Possible values: 0 <= x <= 100) |
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100 Default value: 100 |
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101 |
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102 AdjustTiming |
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103 To get a timing that is as accurate as possible, the drivers measure |
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104 the time for port commands (see: benchmark in syslog). You might |
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105 decrease or increase the time to wait after port commands with this |
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106 parameter. Normally, there is no need to change this parameter. |
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107 Possible values: -50 <= x <= 50 |
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108 Default value: 0 |
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109 |
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110 RefreshDisplay |
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111 Normally, most of the drivers do not update the whole display, but |
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112 only the areas that have changed since last update. So it might be, |
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113 that some faulty pixels would stay a longer time. To avoid this, the |
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114 plugin makes a complete refresh from time to time. This parameter |
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115 defines how often a complete refresh will be done. |
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116 e.g.: A value of 5 means, that the plugin will make a complete |
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117 refresh on every 5th update. |
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118 A value of 0 completely disables complete refreshs. |
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119 Possible values: 0 <= x <= 50 |
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120 Default value: 5 |
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121 |
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122 Wiring |
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123 Select the type of wiring your display is connected with. |
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124 Possible values: 'Standard', 'Windows' |
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125 Default value: 'Standard' |
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126 |