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Altera_Forum's avatar
Altera_Forum
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13 years ago

Bug in altera_avalon_uart_read

NOTE: This is not a question, but an information ************************************ The call to read for a /dev/uart returns a wrong value when non-blocking and no data available. This...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Yes, that is correct and was not changed. Quartus 9 returns 0 (no chars received):

return count;

while Quartus 11 and 12 (and maybe 10) replaced that line by:

if(read_would_block) {

return ~EWOULDBLOCK;

}

else {

return count;

}

The bug appears in Quartus 11 and 12 (and maybe 10 also; I don't have it installed).