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Character LCDs / NHD-0108HZ-FSW-GBW example code
« on: November 22, 2015, 02:50:31 PM »
having trouble getting my NHD-0108HZ-FSW-GBW started using example code on page 7 of its user document.  All pixels remain "on" (dark) after running the "initialization" and "command" functions, with I believe adequate time delays it shows.
2 questions:
1. My understanding is that the 4-bit-mode device expects the high-order digit first, then the low, yet comments in the code for the command and write functions say "clock lower..." followed by "clock upper..."
2. Shouldn't the "command(0x28);" late in the "init" function instead send "0x20" for this single-line display?
Any clarifications would be appreciated

Later Update:
coded an initialization per page 25 of ST7066U chip spec with slight success: now all the 5x8 pixels of the leftmost character are much darker (and blinking) than the other seven characters, but those are also quite visible.  Shouldn't they be almost invisible - this device lacks the contrast-control input that exists on some other models...

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