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Re: [Discuss-gnuradio] USRP custom registers

From: Tiago Rogério Mück
Subject: Re: [Discuss-gnuradio] USRP custom registers
Date: Thu, 17 Sep 2009 10:33:28 -0300

Good to hear that.

Thank you.

2009/9/16 Eric Blossom <address@hidden>:
> 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).
> Eric

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