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PS/2 Driver #4

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thejpster opened this issue Jun 25, 2021 · 6 comments
Open

PS/2 Driver #4

thejpster opened this issue Jun 25, 2021 · 6 comments

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@thejpster
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We need a generic PS/2 driver that works on GPIO pins and interrupts. We can then stand up two of them - one for keyboard, one for mouse.
@thejpster
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Requires #6 so the devices get power

@thejpster
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Note that pins must be inputs floating whilst the DC PSU is off, to avoid back-powering the PS/2 device.

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#17 brings in pc-keyboard. This might need splitting into a generic PS/2 transport, and then a keyboard decoder.

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This is a good guide to how the PC keyboard controller works.

https://www.win.tue.nl/~aeb/linux/kbd/scancodes-11.html#ss11.1

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Keyboard reads work but need write support to alter LEDs and also to turn the mouse on.

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Also consider turning off PS/2 port when we're busy

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