Can we configure a specific channel for continuous scanning?

Question

Hi, 
 Would someone please help me to configure a specif channel for continuous scanning. I was browsing through the forums and understand that the SDK/SD not supports these kind feature, but the posts are little old. 
 In other words, I wish to dedicate one specific radio chip to perform only scanning continuously without any time gap. 
 Earliest answer would be a great help. 
 BR, 
 GGotta

Susheel Nuguru · Accepted Answer

Sorry GovindaRao, 
 forgot to answer the second part of your question. Look at the documentation here , where now you find a member called channel_mask in the scan_params. 
 
 Gotta said: "If we mask one/two channels of from the primary channel(s) are we NOT loosing the time window for that particular time ? Can we say this as CONTINUOUS scanning?" 
 No, the scanner will NOT be loosing the time window for the masked channel. Instead this time will be utilized for other radio activity, if scanning is the only RADIO activity at that time, then it will be continuous scanning on the unmasked channel. 
 The scanner anyways scans only on one channel in that particular scan event. If no channels are masked, then it scans in another channel for the whole scan event. The request for the radio time is done just before the scan event is started. So if one or two channels are masked (not utilized) then the scanner would request radio in the next scan event on the same channel. So you wont loose any timeslots for masking the scan channels.

Susheel Nuguru · Answer

Yes, from S132 v6.0 and S140 v6.0 we support selective channel when in observer role (scanning) 
 Please have a look at the migration document for S132 v6.0, you can find this line: 
 The Observer channel map for primary advertising channels can be set through a new parameter ble_gap_scan_params _t::channel_mask. The parameter type ble_gap_ch_mask_t is the same as is used for setting advertiser channel map.