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Chapter 5: Using Debuggers
Using the Software Development Systems Debugger
Commands should be enclosed in double quotes and given the prefix:
Ctrl-c.
To see the speed that the emulation probe/module is using to
communicate with the target system you would issue the following
command in the SingleStep command window:
control -c "cf procck"
To change the speed to match a 25MHz processor clock you would
issue the following command in the command window:
control -c "cf procck=25"
For more information about "terminal interface" commands see "Built-
In Commands" on page 125.
Download performance
Downloads are fastest when the emulation probe/module speed is set
to match that of the target processor.
The initial speed that the emulation probe/module uses to
communicate with the target processor is set by the Processor clock
item in the Connection tab of the "Debug" dialog.
You are responsible for specifying this speed to be less than or equal to
the initial, reset speed of the processor. Usually a setting in the Target
Configuration tab of the Debug dialog or a command in the _config alias
will raise the speed of the processor above its initial, reset value.
For maximum download performance, the command to increase the
target processor speed should be followed by a command to increase
the speed of the emulation probe/module communication.
The mpc505.cfg file contains the following command which writes to
the SCCR register to set the processor speed to 28 MHz (assumes a
4 MHz crystal).
write -l 0x8007fc50 = 0x041800000
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