Details

Measurement Data Output (MDO) is used to capture the transactions on the bus connected from different interfaces of the AM273x device and transmit outside over LVDS (4-data lanes). MDO is comprised of a sniffer, FIFO, and an aggregator. The corresponding sniffer module sniffs a bus interface and accumulates data in the FIFO. When a FIFO threshold is reached, the data is sent out to the aggregator as a burst transfer.

An MDO source can also inject a marker indicator along with its data for tracking or other related purpose. If a marker is inserted such that it is a part of the last element of the FIFO threshold location, it will be missed.

This happens only when a sniffer other than Sniffer 0 is used for transfer.

Workaround

Multiple back to back markers (>1) can be sent out by the user to ensure at least one of them is registered by the receiver. The same sniffer configurations should be programmed to Sniffer 0 registers. This way the markers would be sent out and registered by the receiver. This workaround is only beneficial where Sniffer 0 is not in use and is idle for replicating other sniffer configurations.