Nick Craig-Wood a53a39922b hd44780: add a mode to work with boards where the RW pin is grounded ...

On some HD44780 boards (eg the Keyestudio LCD1602 expansion shield),
the RW pin isn't brought out and is permanently grounded.

This means that the board can't be read from, and in particular the
busy status can't be read.

This patch adapts the package to work with boards like these.

To signal this to the package, set the RW pin to machine.NoPin.

The package will then disallow all reading and use adjustable timing
based writing. The timing can be adjusted the configuration.

2021-03-26 18:03:15 +01:00

..

gpio.go

hd44780: add a mode to work with boards where the RW pin is grounded

2021-03-26 18:03:15 +01:00

hd44780.go

hd44780: add a mode to work with boards where the RW pin is grounded

2021-03-26 18:03:15 +01:00

registers.go

GPIO implements io readwriter interface, simplified display, smoke tests

2019-05-05 11:42:38 +02:00