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Altera_Forum
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21 years ago

UART(RS232) with 2xCPU

Hi How do I get my system with two CPU's to use the same RS232 UART as STDOUT? It works fine with only one, but when conneccted with two cpu's I get a "permission denied" message, and t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

To keep things simple, can you get by with an RS232 Uart and a JTAG Uart? In situations like these I usually give the resource to a single CPU, and if the data was intended for the other CPU then CPU1 passes the data to CPU2 (by whatever means available). Only problem with this is that you have to "tag" your data so that CPU1 knows whether it is for it or the CPU2. If this isn't an option let us know and maybe someone will have a more suitable idea.