What is the maximum number of EDs, is supported by CC1110 as an Access Point by means of the connection link info it keeps in the RAM using simpliciTI?

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Posted by rahul deo

on Apr 11 2012 07:28 AM

I have a code base, is just modified from CC1111 example code to fit for CC1110. Code works well for any arrangement of star network if the NUM_CONNECTIONS is less than that of 33. The EDs are CC430s.

I want to use at least 36 to 50 EDs for an AP without using any extender. For now it does not matter how slow it responds. For which I tried to build the my code. The IAR is giving following error.

Warning[w18]: Segment XDATA_I (seg part no 48, symbol "simpliciti_start_now" in module "main", address [f9f8-fc0c]) overlaps segment XDATA_AN

(seg part no 9, symbol "flash_write_code" in module "flash", address [fc00-fc1f])

Error while running Linker

Where should I look for decreasing the RAM use or, Is there any option to increase the RAM in the CC1110?

Need urgent help.

Thanks

Rahul Deo

All Replies

Posted by TA12012

on Apr 11 2012 07:33 AM

Expert8395 points

Rahul,

Try cutting your payload sizes in half. The access points are typically limited by payload size.

Regards
/TA

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Posted by rahul deo

on Apr 11 2012 07:55 AM

Intellectual750 points

Thanks TA12012 but it did not help. I just to try, tried decreasing the payload till 0. Same error. Is there any settings in IAR which should be taken care of? I might be missing something.

Is by any chance the RFStudio needed here? Just may be in case.

Thanks

Rahul Deo

Posted by TA12012

on Apr 11 2012 08:15 AM

Expert8395 points

Rahul,

I am not an expert on details of the stack structure of the 8051 core, I found a separate thread discussion a similar issue. Maybe this can help you.

http://e2e.ti.com/support/low_power_rf/f/156/t/136571.aspx

Have you considdered using a CC430 as your AP? It has a much cleaner memory setup.

Regards,
/TA

Posted by rahul deo

on Apr 11 2012 08:44 AM

Intellectual750 points

Hey thanks,

Its not about being expert of something .. a small pointer also sometimes helps like anything. Thanks again.

So it could be IAR software version issue as well. My current version is

IAR Assembler for 8051
7.60.1 (7.60.1.40026)

I will see if this can be done. Any other option I can try for? I am currently just removing all the use of sPersistInfo since I don't need the info all the times. And can get all when ED sends the frame. I'll also look for the EDs only network. I am basically trying RAW communication. Lets C.

Where to start from for RAW communication. I found http://www.cs.washington.edu/education/courses/cse466/10au/pdfs/SimpliciTI%20docs/SimpliciTI%20API.pdf and its last page give a nice way of starting RAW communication. But need to know initial settings.

Thanks

Rahul Deo