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Re: [Discuss-gnuradio] Fwd: set_fpga_master_clock

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] Fwd: set_fpga_master_clock
Date: Sat, 28 Jun 2008 21:00:49 -0700
User-agent: Mutt/1.5.17 (2007-11-01)

On Thu, Jun 26, 2008 at 11:45:53PM +0300, Juha Vierinen wrote:
> Hi,
> I'm not sure if anyone reads the patch list, so I will forward this here.
> ---------- Forwarded message ----------
> From: Juha Vierinen <address@hidden>
> Date: Wed, Jun 25, 2008 at 00:45
> Subject: set_fpga_master_clock
> To: address@hidden
> Hi,
> Here is a patch to modify the usrp fpga_master_clock using
> set_fpga_master_clock(long mc). The same functionality is added to
> gr-usrp.
> I have one doubt about the patch. How do we make sure that you call
> set_fpga_master_clock early enough? Adding the fpga_master_clock
> parameter to the constructor of usrp_base might be a better idea. But
> I only thought about this while writing this mail :). I'll make
> another patch if you guys feel that setting fpga_master_clock in the
> constructor is a better idea.
> juha

Hi Juha,

I looked at the code, and as long as you set_fpga_master_clock before
you attempt to tune the tx or rx side you should be fine.
I'd recommend calling it immediately after you create the usrp.sink or

Could you please generate another patch that does the minimum
required to get the job done?


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