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Add hardware serial support for sun_usb converter

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Tested with a Sun Type 5c keyboard and a 7404 inverter.
This commit is contained in:
John Hickey 2016-05-09 22:56:33 -07:00
parent e9a54995bd
commit d3332d32da
3 changed files with 95 additions and 55 deletions
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converter/sun_usb/README
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@ -48,7 +48,9 @@ Frame format: 1-Start bit, 8-Data bits, No-Parity, 1-Stop bit
To use AVR UART engine you need external inverter in front of RX and TX pin.
Otherwise you can software serial routine to communicate the keyboard.
This converter uses software method, you doesn't need any inverter part.
This converter uses software method by default, so you don't need any inverter part. But
it can also be built with 'make HARDWARE_SERIAL=y' to enable hardware serial if there
is an inverter present. Good results have been obtained using a 74LS04 and hardware serial.
Commands From System To Keyboard