Time to dust off this thread!
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I did confirm with the oscilloscope that what the LCD is receiving is valid data now and that the data matches what it should be. So the bit shift must have occurred outside of the timeframe I sampled with the scope
i.
i switched the clock phase (SPI mode 1 instead of 0)
and it works
i can't
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i.
i switched the clock phase (SPI mode 1 instead of 0)
and it works
i can't
why?? I tested with Arduino's shiftOut weeks ago and it worked?? Isn't shiftOut also mode 0?
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why?? I tested with Arduino's shiftOut weeks ago and it worked?? Isn't shiftOut also mode 0?
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@cato happy eating :3
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@cato happy eating :3
@Citali thanks
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@cato good noms, why is the last word orangy?
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@cato good noms, why is the last word orangy?
@mist yeah no idea, seems like that module might have been replaced and has a slightly different tone
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@cato This is so cool!
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@cato This is so cool!
@thiccpaws thank you! :3
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Next problem: The alternating blinkers next to each row seem to not turn off fully. I already identified this as being caused by the fluorescent tubes inside the display radiating into the ribbon cables (they're just kinda loose inside) and my board missing pulldown resistors. My blinker control uses two shift registers with parallel data but opposite output enables to alternate between left and right and I forgot that enable = low means high-impedance, not low outputs.
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Next problem: The alternating blinkers next to each row seem to not turn off fully. I already identified this as being caused by the fluorescent tubes inside the display radiating into the ribbon cables (they're just kinda loose inside) and my board missing pulldown resistors. My blinker control uses two shift registers with parallel data but opposite output enables to alternate between left and right and I forgot that enable = low means high-impedance, not low outputs.
Pulldown resistors fixed that too!
Next: Fix the broken first row - turns out this was just some broken solder joints. Easy fix. The soldering quality in this display is shockingly poor. But it was a lab / development device after all.
Also gave it a good clean, looks much nicer now!
Now all that's left to do is replace the little potentiometer with a proper brightnes ssensor and wire my board up to the ballasts for dimming.
