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hd44780: configure and write fixes #647

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hd44780: configure and write fixes #647

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Commits on Jan 26, 2024

  1. hd44780: configure and write fixes 

    - Write only the high-part of the byte when configuring in 4-bit mode
similar to the LiquidCrystal library around
[here](https://github.com/arduino-libraries/LiquidCrystal/blob/1.0.7/src/LiquidCrystal.cpp#L116)

- Pulse enable after writing data
similar to the LiquidCrystal library:
[4-bits here](https://github.com/arduino-libraries/LiquidCrystal/blob/1.0.7/src/LiquidCrystal.cpp#L312),
[8-bits here](https://github.com/arduino-libraries/LiquidCrystal/blob/1.0.7/src/LiquidCrystal.cpp#L320)

Addresses issue [tinygo-org#646](tinygo-org#646).
    @sorf
    sorf committed Jan 26, 2024
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