 Function
The Fast Data Exchange (FDX) enables transferring user data between the target and the host.
The protocol implementation on target side is included in the target application.
Example source code is provided by Lauterbach. On the host side the transmitted data can be
processed by a user application communicating with the TRACE32 Application Interface
or through Named Pipes. In a none-interactive mode TRACE32 can also read or write normal
files as a general data source and sink. The FDX protocol has only a few overhead compared
to the amount of processed data. Due to the buffered data transfer, the FDX channel has a
high bandwidth.
Trace
A special application of the FDX is the FDX software trace.
Through the trace application interface the target application can send trace
information to the host. TRACE32 is capable to interpret the FDX data stream and handle
it as ordinary trace information device.
Methodes
TRACE32 supports different basic transfer methods.
Memory mapped buffered transfer through dual port memory allows
communication in real-time, normal memory access at breakpoints
or spot breakpoints can be used for almost all CPUs.
Some target devices support a Debug Communication Channel (DCC),
which can be used to transfer FDX data in real-time too.
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