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Altera_Forum
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16 years ago

"Resource temporarily unavailable" while reading from "dev/ttyS0"

Hi all, i have ported uClinux on DE2 2c35 board and i want to use RS232 port on the board to communicate with a PC. I understand that I can use "dev/ttyS0" for that purpose. I can open and write ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

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Hi ARTEM_BOND,

thanks for replying!

I know using delay is a bad way. Can u plz tell me another way to wait data from the host?

I tried fcntl(fd1, F_SETFL, 0);, but i had to a long time without receive any data.

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Set timeout.

http://linux.die.net/man/2/select

http://www.linux.org/docs/ldp/howto/serial-programming-howto/x115.html

Also you can make you own module (driver) for UART. And write you own UART with hardware time-out timer on Verilog.