uart hal questions ?

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1. how can I open the uart for non blocking read ?[/b]

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As you put it in your example, this opens the UART non-blocking

int fdterm; // FILEDESCRIPTOR RETURNED BY OPEN

flags= O_RDWR | O_NONBLOCK | O_NOCTTY;

fdterm = open(devicename,flags);

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2. how can I do "blocking output" with "non blocking read" ?[/b]

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Open it twice i.e.

int fdterm; // NON BLOCKING FILEDESCRIPTOR RETURNED BY OPEN

int fdterm_block; // BLOCKING FILEDESCRIPTOR RETURNED BY OPEN

flags= O_RDWR | O_NONBLOCK | O_NOCTTY;

fdterm = open(devicename,flags);

flags= O_RDWR | O_NOCTTY;

fdterm_block = open(devicename,flags);

Use the appropriate handle depending upon whether you want blocking or non-blocking behaviour

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3. how can I disable RTS/CTS in software ?[/b]

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You can&#39;t it&#39;s asssumed that if you selected this hardware in SOPC Builder you will want the software. If you don&#39;t want RTS CTS turn it off in SOPC builder and save yourself some hardware resources