http://www.programmersheaven.com/ Contains the latest posts from the thread 'Need help about embedded C programming' posted on the 'C and C++' forum at Programmer's Heaven. en Copyright 2013 Programmers Heaven Fri, 24 May 2013 19:46:03 -0700 Fri, 24 May 2013 19:46:03 -0700 Argotic Syndication Framework 2007.3.0.1, http://www.codeplex.com/Argotic http://www.rssboard.org/rss-specification 360 http://www.programmersheaven.com/images/ph.gif http://www.programmersheaven.com/ 88 31 http://www.programmersheaven.com/mb/CandCPP/394372/394372/need-help-about-embedded-c-programming/ Hi all,<br /> I need some info about below program for embedded C,<br /> <br /> void main (void ){<br /> unsigned char mybyte;<br /> P1=0xFF; // make port input enabled<br /> while (1){<br /> mybyte=P1;<br /> MSDelay(500);<br /> P2=mybyte; // buzzer signal<br /> }<br /> }<br /> <br /> In above program, 0xFF signal is sent to port 1 for enabling it for input.<br /> Now if, i am passing 0xFF as an input signal to port 1 then the same data will get assigned to mybyte and after that it will be sent to P2.<br /> Now my question is, will P2 become input enabled or it will just send that data to output device?<br /> How does the port differentiate between output signal and latch signal? <br /> <br /> Regards,<br /> Mahesh Kedari http://www.programmersheaven.com/mb/CandCPP/394372/394372/need-help-about-embedded-c-programming/ Wed, 29 Jul 2009 10:05:08 -0700 C and C++ http://www.programmersheaven.com/mb/CandCPP/394372/394461/re-need-help-about-embedded-c-programming/#394461 Typically, microcontrollers have at least 2 registers per port: one for data direction (input/output) and one for the actual data.<br /> <br /> How your particular microcontroller works, I have no idea. Might be wise posting which one it is if you expect better replies... http://www.programmersheaven.com/mb/CandCPP/394372/394461/re-need-help-about-embedded-c-programming/#394461 Fri, 31 Jul 2009 07:23:31 -0700 C and C++