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NOOB HELP: want to access one bit at a certain address

 
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NOOB HELP: want to access one bit at a certain address
PostPosted: Sat Sep 08, 2007 5:57 pm     Reply with quote
We are using TIMER1 as a Timer on the 16F877A. What we are trying to do is count the number of times the Timer over flows by polling bit 0 of PIR1, which is TMR1IF. The question is how do we poll/read this one bit at a certain address or what is the code for polling/reading one bit at a certain location? There is a Bit_Test() function but how can we specify which byte/address to bit test?
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Sat Sep 08, 2007 9:35 pm     Reply with quote
You can use the #bit directive to make the TMR1IF flag into an accessible
variable. Then just write C code to test it. See near the end of this post:
http://www.ccsinfo.com/forum/viewtopic.php?t=17174&highlight=bit+TMR1IF&start=4
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