hd44780: configure and write fixes

tinygo-org / drivers

TinyGo drivers for sensors, displays, wireless adaptors, and other devices that use I2C, SPI, GPIO, ADC, and UART interfaces.

https://tinygo.org

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hd44780: configure and write fixes #647

Open sorf opened 5 months ago

sorf commented 5 months ago

Write only the high-part of the byte when configuring in 4-bit mode similar to the LiquidCrystal library around here
Pulse enable after writing data similar to the LiquidCrystal library: 4-bits here, 8-bits here

Addresses issue #646.

0pcom commented 4 months ago

I tested this as requested and was still getting panic with my setup and this particular 16X1 VFD. I posted my workaround in #646 the panic i was experiencing is related to lcd.Display() however and is perhaps unrelated to the fixes in this PR