[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] USRP custom registers

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] USRP custom registers
Date: Wed, 16 Sep 2009 14:37:19 -0700
User-agent: Mutt/1.5.18 (2008-05-17)

On Wed, Sep 16, 2009 at 04:40:33PM -0300, Tiago Rogério Mück wrote:
> Hello,
> We are working on a custom FPGA build that is going to need more then
> the 32 registers available for user's builds. I looked at
> fpga_regs_standard.v/fpga_regs_common.v and
> seems that the registers 96-127 are not being used. Is there a problem
> in using these registers ? Or in extending the registers address space
> beyond 127?

You should be good up to 127.  The host code, the FX2 firmware and the
FPGA code limit the register number to 7-bits (1 bit is used to code
for read vs write in the SPI transaction that is used to read or write
the FPGA registers).


reply via email to

[Prev in Thread] Current Thread [Next in Thread]