A hardware filter checks I2C events locally, thus, the total number of messages send to the PC can be reduced.In case you want an I2C tracer with analog tracing capabilities maybe you should consider using Tracii XL 2.0. This, you have a good chance to show the event you are interested in on your oscilloscope triggered by Tracii 400. Trigger output for the I2C bus conditions start, stop, ack and for the error condition frame error.Thus, you do no only see the order of the messages, you have the actual timing at your fingertips. Time stamps are available, each and every message byte has a time value.Thus, the I2C clock is not stretched except for the unlikely event of a buffer overflow. Since I2C logging is done in hardware Tracii’s tracing capabilites are superior to all software based solutions.Įven for 400 kbit/s all the I2C traffic is logged without slowing down the bus as long as the 64 kByte local buffer is not filled up.With the help of hard- and software filter the stored messages can be limited to the interesting ones. I2C traffic is logged to the local on-board memory.
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