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problem with key pad matrix interfacing problem with key pad matrix interfacing
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Old 7th May 2008, 11:57 AM   (permalink)
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How can it compile when there are variables/constants undefined?

Writing 0xff to an input port does not pull it high. It is not an 8051. Look in the data sheet at the option register.

Mike.
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Old 8th May 2008, 04:12 AM   (permalink)
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Quote:
Originally Posted by Pommie
Writing 0xff to an input port does not pull it high. It is not an 8051. Look in the data sheet at the option register.

Mike.
i was pull down the PORTB registers,making one row high and check the columns......
but the same problem occoring..
help me boss..............
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Old 9th May 2008, 10:29 AM   (permalink)
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Quote:
Originally Posted by Pommie
How can it compile when there are variables/constants undefined?

Writing 0xff to an input port does not pull it high. It is not an 8051. Look in the data sheet at the option register.

Mike.
Pommie, it works fine ..
i used keypad library from mikroC for programming purpose.....
Problem is with the keypad matrix.....
i did not ground rows throgh 10k or 1000k resistor......
after this it works fine......
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Old 9th May 2008, 10:30 AM   (permalink)
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thanx every on who are supported me......
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