Microblaze and software interrupts?

What abiout using FSLs to communicate between processors? They have a FIFO with somne capacity, they generate interrupts... it is the firmware implem,entation of a queue.

Zara

If you have the ML410 board, then you should already have access to the Xilinx resources for it as well. Take a look at the ML410 Reference Design page and you'll see that Xilinx has provided reference designs for dual-processor configurations. If you dig a little deeper into the projects, you'll see that Xilinx has even gone so far as to provide a core for what you're looking for:

Mutex Mailbox Interface

Here's the ML410 Ref Design page:

-- Mike

The problem is, that I have to link every core with each other. A Microblaze core only have eight FSL ports so I could only combine three cores. But I have to check the interrupt idea, perhaps I can use the interrupt signal in my global interrupt controller and all cores react to the interrupt.

I solved my Problem with the two GPIOs. You have to design the interrupt GPIO as an input only element an link the GPIO_in port with the GPIO_d_out port of the other GPIO core. If the global interrupt register and the IP-Interrupt register is set correctly, every transition in the second GPIO data register activate an interrupt.

Thanks to Zara and morphiend for their ideas!

Hi,

Each FSL port has one input connection (slave) and one output connection (master). So with 8 FSL ports, you can connect from one MicroBlaze to eight other MicroBlazes.

This should be enough for your system.

Göran Bilski

Yes, that's right. But it doesn't work when MicroBlaze Nr. 3 should communication with MicroBlaze Nr. 2 - or? In my opinion the only solution in this configuration is to use a token ring communication. But then it must be a cyclic communication and not an interrupt driven.

Each MicroBlaze has 8 FSL-Ports. So if you have up to 9 MicroBlazes you can connect every MicroBlaze with every other.

Andreas

on

OK - I see. There are eight input AND eight output ports so it's possible to connect 9 MicroBlazes with each other. Thanks for your explanations. The advantage of my solution is, that there is only one interrupt source and all processors can handle it in the same way.