RE: Background Scanning Channel

Petter Myhre — Mon, 22 Sep 2014 12:20:19 GMT

Sorry, that was an error, I have updated the project to use sd_ant_channel_low_priority_rx_search_timeout_set, not sd_ant_search_channel_priority_set. Thank you for making me aware.

RE: Background Scanning Channel

testy — Fri, 19 Sep 2014 23:07:31 GMT

What does sd_ant_search_channel_priority_set serve for in one channel config (*.rar, valid search priority value: 0 to 7 according to SDK's doc, 0 to 255 in ANT Message Protocol)?

Wouldn't be sd_ant_channel_low_priority_rx_search_timeout_set be better?

RE: Background Scanning Channel

Petter Myhre — Wed, 17 Sep 2014 15:40:01 GMT

Sorry for the delayed answer.

ANT has an application note on "Background Scanning Channel".

I just tested what you describe, and it works as expected. I'm able to receive messages from both master channels.

I use the ANT+ USB dongle to send two different messages on two master channels,

I used S210 and modified ant_broadcast/broadcast_rx from our SDK. I also did a quick test with S310.

I added a few defines, and modified

ant_channel_rx_broadcast_setup(void) and channel_event_handle(uint8_t * p_event_message_buffer).

If you go into debug mode and put a breakpoint at count = 0 you should be able to see that the messages array contain both 0x01 and 0x02.

I have attached my project, please use it as a proof of concept. [Updated]

ANT+ USB dongle setup:

Channel0

Master (Transmit)
Tx Only
Device Number: 1
Device Type: 1
Trans. Type: 1
Channel Period: 8 Hz
Radio Freq: 2466MHz
Send Using Extended Messaging (works with or without)
Broadcast:  0x02 0x02 0x02 0x02 0x02 0x02 0x02 0x02 0x02

Channel1

Master (Transmit)
Tx Only
Device Number: 2
Device Type: 1
Trans. Type: 1
Channel Period: 4 Hz
Radio Freq: 2466MHz
Send Using Extended Messaging (works with or without)
Broadcast: 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01