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Altera_Forum's avatar
Altera_Forum
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17 years ago

Mailboxes error in multicore system

Hi, I have a 2-CPU system based on the NEEK, with two mailboxes (one for each CPU). One CPU send a 4-bytes message to the other, which displays it. The problem is that after that, the send and get...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

There is no problem. The get function returns EWOULDBLOCK because there is no further message to read. It is the expected result, as you post only one message, and then wait for a long period of time.

If you want the receiving CPU to wait until a new message is available, you should use the altera_avalon_mailbox_pend() function.