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Altera_Forum's avatar
Altera_Forum
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20 years ago

UART polling

Hello to everybody, I'm developing an application made by several task. I'd like to receive data from uart in asynchronous way. So I has a main loop that continuously execute some task and...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

instead of using the FILE *

try using the next code

int fdterm;

int flags= O_RDWR | O_NONBLOCK | O_NOCTTY;

fdterm = open(uartName.c_str(),flags);

if(0==fdterm)

throw Execption;

int len=read(fdterm,str,ALT_AVALON_UART_BUF_LEN);

read will return 0 if there is nothing to read