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Today's Topics:
1. Object for spi_iface (Pertti Sepp?nen)
2. AD9862 frequcncy (???)
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Message: 1
Date: Sun, 10 Jun 2012 12:17:33 +0300
From: Pertti Sepp?nen <[email protected]>
To: [email protected]
Subject: [USRP-users] Object for spi_iface
Message-ID:
<camcf0wku3fskfgom5uuby40du-ib0j44ar7+ztmhfmewsmm...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
going thru the documentation & code on the SPI interface for usrp1 I did
not manage to find a way how to construct an object for it. The interface
is there and is used by for instance in codec_control. The latter has a
constructor but it is not opened for an application programmer.
Is there a way to use the SPI interface with usrp1 that I missed in my
search or is there any other means to access the ADC/DAC registers from the
application code?
BR
Pertti Sepp?nen
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Message: 2
Date: Sun, 10 Jun 2012 23:42:23 +0800 (CST)
From: ??? <[email protected]>
To: [email protected]
Subject: [USRP-users] AD9862 frequcncy
Message-ID: <[email protected]>
Content-Type: text/plain; charset="gbk"
Dear everyone:
You see in USRP1, when AD9862 performs DAC, I/Q interleaved data are
latched using CLKOUT1 or CLKOUT2, that is I1Q1, I2Q2, I3Q3,etc. Suppose we use
CLKOUT1 and CLKOUT1 is 64MHz, should the I/Q data together be interpolated to
32MHz so that I data and Q data are latched in 64MHz respectively? For example
I1Q1 last 1/32M second, CLKOUT1 use 64MHz to latch I1 and Q1. Do I understand
correctly?
Best regards
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