fix Sync-initiated PDO transmissions#66
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PDO transmission_type 1-240 means "send this PDO every N Sync packets". There was a bug in the Sync counting logic that made it only work on the "first Nth" Sync packet, because the PDO's sync counter did not reset to zero when the PDO transmission happened. Luckily the AtomicCell API includes a fetch_update() function that lets the caller pass in an update closure. This commit switches from fetch_add() to fetch_update() with a closure that increments the sync counter, but also makes it reset to 0 when transmission happens.
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PDO transmission_type 1-240 means "send this PDO every N Sync packets".
There was a bug in the Sync counting logic that made it only work on the "first Nth" Sync packet, because the PDO's sync counter did not reset to zero when the PDO transmission happened.
Luckily the AtomicCell API includes a fetch_update() function that lets the caller pass in an update closure.
This commit switches from fetch_add() to fetch_update() with a closure that increments the sync counter, but also makes it reset to 0 when transmission happens.