reflash 7i73 for different i/o?

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21 Nov 2015 23:03 #65631 by cmorley
Is it possible to reflash the 7i73 for more outputs?
or is it possible to add a keyboard component to another more general SmartSerial board?

I have a project that has a 37 key keyboard, a MPG , 10 inputs,and needs 22 outputs for LED status.

hmm maybe I could rewire the LEDs in a matrix to save on outputs - I saw something on the net about that...
It would also require some HAL magic to light the right LEDs. I wonder if it would flicker too much at the servo rate.
A conversion in FPGA hardware would be nicer.

Chris M

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22 Nov 2015 00:46 #65635 by PCW
Replied by PCW on topic reflash 7i73 for different i/o?
If you have a 1 KHz servo thread, a 4x1 mux for the LEDs would still run at 250Hz so would have minimal flicker

You can use the matrix component to scan a KB matrix on any hardware (even parallel ports)
so a general (say 7I84) sserial remote could use this to scan a KB matrix

Another possibility is a 7I90HD in ssremote mode. This gives you a sserial remote device with
72 I/O bits for any use (KB,LEDs software MPG etc)

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22 Nov 2015 05:32 #65641 by cmorley
I had assumed that scanning in hardware would get better response but then maybe software scanning is fast enough.
I didn't realize the 7i90hd could be a sserial device -very nice.

Thanks Peter

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