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AN14 documentation error?

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Total Posts: 40

Joined 2009-03-20

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In AN14, section 5.3, the third step of sending a reverse message back to the master is:

"3. Send the extended message, appending
the channel ID of the destination master
(configured in step 2) to the data."

I believe this is incorrect.

Instead of sending an extended message to ANT, it works fine to send a normal message on the channel used in steps 1 and 2. After all, the channel configuration is already done for that channel, with the appropriate (device_number, device_type, transmission_type) set.

I ran into this in nrf51422 development, as the nrf51422 SDK doens't include a function to send any "extended message" to the Ant softdevice.

Perhaps the AN14 documentation could be amended to clarify this.
     
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Total Posts: 662

Joined 2012-10-09

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Hello Mark,

Thanks for pointing out the inconsistency in the documentation. There are two ways of sending messages in the reverse direction in scanning mode:

1) Send an extended message with the channel ID field set to match the ID of the intended destination

2) Set up the channel ID of a channel to match the ID of the intended destination and send a standard message

Since option #1 is not available for the nRF51, you should be fine using option #2.