# \[GSoC\] Co-Processors Update #4

**URL:** <https://www.ruby-forum.com/t/gsoc-co-processors-update-4/234786>\
**Category:** GNU Radio\
**Created:** [June 26, 2014, 8:54pm UTC](https://www.ruby-forum.com/t/gsoc-co-processors-update-4/234786 "2014-06-26T20:54:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [June 26, 2014, 8:54pm UTC](https://www.ruby-forum.com/t/gsoc-co-processors-update-4/234786/1 "2014-06-26T20:54:03Z")

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Hello community,

Sorry this update is so late. I spent about a week walking down the  
wrong  
path so I’ve been spending days and nights trying to get an actual  
update.

Logistical:

- Midterm evaluations due tomorrow
- Coproc dev call tomorrow

Progress:

- In getting the FFTC to work, I followed the builtin examples which  
require us to run Ti’s code composer software and have the board in a  
mode  
where the ARMs are shut off. When I tried to program the DSP through the  
ARM to run the examples, I get memory errors because the DSP is trying  
to  
initialize subsystems that have already been initialized by the ARM.  
Spent  
a long time on that getting nowhere so what Philip recommend to me was  
to  
try to get things working without the DSP cores starting from hello  
world.
- I’ve been able to initialize a couple of subsystems like the QMSS and  
CPPI. I just need to get the configuration correct for talking to the  
FFTC.  
I’ve been able to compile the FFTC drivers using the linaro arm  
toolchain  
so I’m confident this approach will work. TI’s software is multi layered  
so  
not that many changes are required to port code from the DSP to the ARM.
- Taking it a step at a time trying to understand what’s going on is  
making  
me a better programmer. I feel a lot more prepared to tackle modifying  
GNU  
Radio. Hopefully I get past setting up the TI chip next week so I can  
switch gears.

I’ve been holding back updating the wiki since I wasn’t sure if this  
method  
was going to get me anywhere but it actually works! will update the wiki  
this weekend with a big section on programming this monster using TI’s  
libraries and the linaro arm toolchain. I’m sure my method isn’t the  
prettiest but hopefully it’s a start so others can develop applications  
using the coprocessors through the ARM. I imagine it will be useful to  
the  
TI people and others using this board.

Not as much progress as I’d hoped but at least I can see the light  
again.  
Thanks!