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Re: [Discuss-gnuradio] "E" on USRP2 UART
From: |
Leonard Marziliano |
Subject: |
Re: [Discuss-gnuradio] "E" on USRP2 UART |
Date: |
Fri, 06 May 2011 15:15:19 -0400 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 |
Actually, I have some thing like this on the terminal screen:
UEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEE
EEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEE
EEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEE
EEEEEEEUEEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEE
EEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEU
EEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEE
EEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEEUEEEEEEEEE
EEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEUEEEEEEEEEEEEEEEEEEU and
so on..
As you can see, it is very regular.
To put things in context, I'm trying to develop a DVB-S2 Modulator using
a very fast PC (six cores Xeon Dell, running Ubuntu 10.10) and the USRP2
using C++ code. I'm not using GNU Radio. So far, I've not been very
successful in term of getting the system running smoothly in real-time.
When I look at the signal coming out of the USRP2 , it is very choppy.
I've optimized a lot of code but still have the choppy issue. I'll
looking it further but if anybody has any ideas suggestions on this,
I'll be very happy to hear them !
Thanks,
Leonard
On 06/05/2011 11:04 AM, Leonard Marziliano wrote:
Hi,
I'm starting to see "E"s on the USRP2 UART output when my application
is running. I know that "U" means underrun but not "E"s. Anybody has
an idea ?
Thanks
Leonard
--
Leonard Marziliano, Research Engineer
Communications Research Centre Canada (CRC)
3701 Carling, Ottawa, CANADA K2H 8S2
Tel: (613) 993-0578
Fax: (613) 990-0316
http://www.crc.gc.ca