Has anybody had experience with the Xilinx virtex4 port with apu fpu. I’m trying to make it work now. (the apu fpu port) As long as I deal with the "usual" tasks all working fine. When I introduce the floating tasks the system just freezes. All tasks are created with success but when the scheduler is trying to run the first task all freezes. I am working with virtex4 fpga but on a customized board (not evaluation ml410). Also I ported the project from xilinx edk 8.2 to 9.2.02i and running it from there. When I run simple float multiplication without multitasking it succeeds. Xilinx errata on the ppc405 mentions system freeze : http://www.xilinx.com/support/answers/14052.htm But I’m not sure if I encounter one of their scenarios. Any suggestions ? Thank you. In advance.

I had a thing occur where the FPU didn’t work correctly – control didn’t pass back to the CPU so the system froze after a FLOP calculation.  Having ping ponged it back and forth with Xilinx for a while they suggested that I installed their entire tool chain, instead of ‘just the components I needed’.  After I followed their instructions the problem went away. Don’t know if this is in any way related to your issue though. Regards.