[USRP-users] Problems using dsplink on E100

Stefano Speretta s.speretta at isispace.nl
Tue Feb 21 12:04:10 EST 2012

Actually we are just started playing with the E100. I tried using the 
ARm while also running a demodulation routine and
it uses quite a lot of CPU, so we where thinking about offloading part 
of the computation to the DSP.

In the short term I was thinking of using UHD to receive samples and 
pushing them straight to the DSP but we may also try
to directly map the FPGA pins to the DSP and play directly there.... The 
second option is definitely interesting but I fear it
requires quite a lot of work ... I tried googling around to see if 
somebody actually did something similar but I had no success.


On 2/21/2012 5:38 PM, Andre Puschmann wrote:
> On 02/21/2012 04:24 PM, Stefano Speretta wrote:
>> Here is the output:
>> i-dsplink - 1:1_65_00_03-r0i.9
>> ti-dsplink-examples - 1:1_65_00_03-r0i.9
>> ti-dsplink-module - 1:1_65_00_03-r0i.9
>> We also tried the module you sent us and it works!
> Great! What was special about it Philip? I guess you've compiled it for
> your kernel?
> Stefano, you mentioned you wanted to use the DSP for off-loading stuff.
> Are you just beginning or have you or anybody else already done
> something? Is the memory used by the FPGA to exchange bits between GPP
> and FPGA accessible by the DSP already? Are there any UHD changes required?
> -Andre

Stefano Speretta
ISIS - Innovative Solutions In Space BV
Molengraaffsingel 12-14
2629 JD Delft
The Netherlands

Phone:   +31(0)15 256 9018
Fax:     +31(0)15 257 3969
E-mail:  s.speretta at isispace.nl
Web:     www.isispace.nl

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