Hi Eric,
On 2013.02.18. 1:47, Eric Decker wrote:
Not enough information.
Can you push your tree to your account on github? If you don't have
a github account please get one so you can push your code up to it and
then I can look at it.
I didn't have a github account so I created one quickly. I hope I did
everything right. Here is the address of my current tree:
https://github.com/erdelyiadam/prod/tree/AE
I created a new platform under the name of "nthfs".
Then I can see how you have things wired.
Since you get one event it probably isn't a wiring problem but some
other kind of failure.
Sorry, my description was ambiguous. I get no event at all, I can see
only the first SFD signal and only on the oscilloscope. So on SW side I
got nothing abour SFD.
What does your h/w look like? How is the 2520 wired to the 5438a?
The HW I'm using is an MSP-EXP430F5438
<http://www.ti.com/tool/msp-exp430f5438> board from TI with a CC2520EMK
<http://www.ti.com/tool/cc2520emk> RF modul.
As for the wiring: MSP-EXP5438 Users's Guide (Schematics).pdf
<https://www.dropbox.com/s/gdv1mu35kx1hzgl/MSP-EXP5438%20User%27s%20Guide%20%28Schematics%29.pdf>
(Page 30) and CC2520EM_2_1_schematics.pdf
<https://www.dropbox.com/s/wv0tnuq0w5eubpk/CC2520EM_2_1_schematics.pdf>
On Sun, Feb 17, 2013 at 4:00 AM, "Erdélyi Ádám [Edöm]"
<erdelyiadam.e...@gmail.com <mailto:erdelyiadam.e...@gmail.com>> wrote:
Hello Everyone,
I'm (still) trying to interface the MSP430F5438a uC with the CC2520
radio chip. (I'm using the tp-freeforall/prod repo)
Now I'm facing the following problem:
When sending out (TX) messages the SfdCapture.captured event never
fires, except after boot-up for the first time.
- I captured some of these "first packets" with a CC2531 USB
dongle and
TI Packet Sniffer and the result looks like this every time:
41 88 11 22 00 <tel:41%2088%2011%2022%2000> FF XX XX XX XX XX XX
XX XX XX (where XXs are different
every time, but the length is the same, 15)
- I also measured the signal with an oscilloscope on GPIO4 of CC2520
(which is set to SFD by default (based on CC2520 Datasheet / SWRS068)
and connected to P8.1 on MSP430F5438a) and I can see this first SFD
signal after boot-up, but the high-level of the signal is only around
0.3V. (I don' really understand why so low.)
- I tried to remap the timers, because by default the radio uses Micro
timer (my HplCC2520.nc is based on sam3s_ek) which is mapped to
Timer1_A, but the P8.1 (the SFD signal from CC2520) is mapped to
Timer0_A which is a T32khz timer, so I replaced Timer0_A and Timer1_A
with each other, but it didn't get any better.
At the moment I'm out of ideas, if anyone could give me a hint
what the
problem could be, it'd be great.
(the above mentioned event can be found in
/tos/chips/cc2520/CC2520DriverLayerP.nc around line 1600)
Thank you in advance.
Best wishes,
Adam Erdelyi
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--
Eric B. Decker
Senior (over 50 :-) Researcher
It would be great if you could help. I feel totally lost.
Regards,
Adam
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