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* altos/vidtime: Check for value change in normal code, not irqKeith Packard2018-05-16
| | | | | | This makes sure each value change is reported to the user. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos: add 'vidtime', a simple brightness monitorKeith Packard2018-05-07
This is a testing tool for video refresh tracking. It uses the mpusb v3.0 hardware and monitors the phototransistor value, sending 0 or 1 to the USB port when the value changes. Signed-off-by: Keith Packard <keithp@keithp.com>