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CC2538DK: Reg. channels in CC2538

Part Number: CC2538DK
Other Parts Discussed in Thread: CC2538

Dear TI engineers,

I am using CC2538 (EM) + SmartRF06 Evaluation Board (EB)  (Linux Ubuntu; Contiki OS)

I just wanted to confirm if there are a total of 8 or 16 channels (that can be used) for configuring the CC2538 chips.

The data sheet says it has  only 8 Channels (If so, what nos. are they?)

However, as per example codes (like cc2538-rf.c link: https://github.com/contiki-os/contiki/blob/master/cpu/cc2538/dev/cc2538-rf.c

param channel The desired channel as a value in [11,26]
 \return Returns a value in [11,26] representing the current channel *

 So can I choose any channel/number from 11 to 26?

I assign channels in the following line of the code within the 'contiki-conf.h' file:

#define CC2538_RF_CONF_CHANNEL              26  

(I have configured the CC2538 chips with 11, 25 and 26 so far and all of them seem to work perfectly fine.)

Thanking in advance,

Indrajit