keypad scanner
- From: praveen.kantharajapura@xxxxxxxxx
- Date: 2 Jun 2005 20:54:35 -0700
Hi all,
I am implementing a 6x6 matrix keypad scanner in CPLD.
My requirment is i should detect multiple key presses also.
What i am planning to do is , i will scan the rows (6 of them
sequentially) , when all the 6 rows are scanned i will send the 36 bit
output(each bit corresponds to each individual key .'0' indicates
pressed)to the controller.The scan rate for each row is approximately
32 msec , so every 32x6=192 msec i will be sending the 36 bit code to
controller(HCS12).
I want your comments on this implementation in CPLD.
Regards,
Praveen
.
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