Failed to read UART with non blocking mode

Programmable Devices

CPLDs, FPGAs, SoC FPGAs, Configuration, and Transceivers

Failed to read UART with non blocking mode

1,147 Views

I am working with Altera FPGA DE2 with with Nios II 13.0sp1 Software Build Tools for Eclipse, first I worked with UART with blocking mode using open(), read() and write() functions, It worked fine, but when I change to non blocking mode (I added O_NONOBLOCK to the open function), but the read call fails, it returns -1, and then I read the errno value and it was 12 which corresponds to ENOMEM. I have found a similar post but it was not answered. Is that a way to fix this ?

Any idea or comment is welcomed

Thank you in advance

Link Copied

0 Replies

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.