shared fifo

[omega7]

Hi all,
I have a concept of a transmit thread which transmits frames by means of a uart and a frame fifo. This transmit thread must have a frame fifo which can be accessed (frame push) by one or more other threads on different cores.
My struggle is that channels are point-to-point. So a resource, in this case a frame fifo, cannot be accessed by two or more threads.
Any suggestion or example for such a fifo is welcome!
Thanks in advance.
Martin

[Bianco]

Hello,

Channels are not neccesary point-to-point.
A multipoint-to-point setup is also possible as multiple channel ends can have the same destination.
This is not achievable in pure XC though, it requires some assembly snippets here and there.

[richard]

Are you able to use multiple channels and a select? You would have a channel between every thread that produces data and the thread managing the FIFO. The thread managing the FIFO would select on receiving data from any of the channel ends attached to the producers and then read the data from that channel end into buffer.

[omega7]

Hi Richard, Bianco,

Thanks for your quick answers. This is what I needed. In the meantime I found some asm code for locking resources. I am thinking of a solution which uses both of your hints. Any example of a frame fifo is welcome by the way... ;)

Martin