Formatted output
C-SPY provides various methods for producing formatted output:

_ _message argList; Prints the output to the Debug Log window.
_ _fmessage file, argList; Prints the output to the designated file.
_ _smessage argList; Returns a string containing the formatted output.

where argList is a comma-separated list of C-SPY expressions or strings, and file is the result of the _ _openFile system macro, see _ _openFile.
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Examples
Use the _ _message statement, as in this example:
var1 = 42;var2 = 37;_ 
__message "This line prints the values ", var1, " and ", var2, " in the Log window.";This should produce this message in the Log window:

Перепишите (напишите свою) функцию __write или putchar (не помню точно, см. документацию) и перенаправьте вывод куда вам будет угодно.

Так а каким образом её перенаправить??? (впринципе именно это и интересует) как бы например на компорт перенаправить???

THE C-SPY TERMINAL I/O WINDOW
To make the Terminal I/O window available, the application must be linked with support
for I/O debugging. This means that when the functions __read or __write are called
to perform I/O operations on the streams stdin, stdout, or stderr, data will be sent
to or read from the C-SPY Terminal I/O window.
Note:The Terminal I/O window is not opened automatically just because __read or
__writeis called; you must open it manually.
For more information about the Terminal I/O window, see the C-SPY® Debugging
Guide for MSP430.