SAMV71Q21 FPU Issue

Discussions around product based on ARM Cortex M7 core.
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hassen
Posts: 3
Joined: Wed Apr 15, 2015 12:10 am

SAMV71Q21 FPU Issue

Wed Apr 15, 2015 1:34 am

Hello, i wanted to activate the FPU on the samV71Q21 evaluation kit with keil µvision V5.13. So in the option target in keil,in "floating point hardware" field i put "use single precision",the FPU doesn't work. the CPU goes in usage fault handler.
How i can fix this issue, thnx. :wink:
Turboman
Posts: 4
Joined: Mon Sep 07, 2015 9:18 am

Re: SAMV71Q21 FPU Issue

Mon Sep 07, 2015 9:41 am

I've used the FPU successfully on the xplained ultra, in Atmel Studio. I used the enableFPU() function -there may be an underscore / different spelling, but that enables the FPU.

Also, the FPU on this core is double precision, not single, so you may be causing a problem there. I haven't tried this board on keil yet. Try selecting double precision maybe?

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