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HD44780 contrast reg. by software, and other questions ??
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<blockquote data-quote="pshdo" data-source="post: 127305" data-attributes="member: 11391"><p>Hi there....</p><p></p><p>I have been playing with my HD44780 40x4 device (pulled out of an old danish train), and i have some questions.....</p><p></p><p>I see in LCD applications like MP plugin and eg. LCD Smartie, that it is somehow possible to regulate the contrast and the backlight from the software, but what hardware do i need (perhaps to build) to do this ??</p><p></p><p>Also i have tried the MP Plugin, and while it do support 40 car. i dont think it support 4 lines of text..... ??</p><p>LCD Smartie do use all 4 lines, but MP Plugin only use the top 2 lines of the display, leaving the two bottom once blank....</p><p></p><p>Is this right or what have i done wrong ??</p><p></p><p>I try the 44780 40x4 driver, is there any one else i should try for this ??</p></blockquote><p></p>
[QUOTE="pshdo, post: 127305, member: 11391"] Hi there.... I have been playing with my HD44780 40x4 device (pulled out of an old danish train), and i have some questions..... I see in LCD applications like MP plugin and eg. LCD Smartie, that it is somehow possible to regulate the contrast and the backlight from the software, but what hardware do i need (perhaps to build) to do this ?? Also i have tried the MP Plugin, and while it do support 40 car. i dont think it support 4 lines of text..... ?? LCD Smartie do use all 4 lines, but MP Plugin only use the top 2 lines of the display, leaving the two bottom once blank.... Is this right or what have i done wrong ?? I try the 44780 40x4 driver, is there any one else i should try for this ?? [/QUOTE]
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