I am debugging some code written for the MSP430F2132, which has very little flash memory available for the program. In order to debug properly, I must send information out to a terminal so that it can be stored and viewed at a later time. Normally I would use printf or a similar command (putchar, perhaps) and have it linked to the CCS 6.1 console. However, due to the lack of program memory on the micro, I am unable to use these functions. I also do not have the option of modifying the board to make use of a built-in UART channel on the micro. I am connected to the micro using the MSP-FET430UIF USB debug interface, which supposedly implements a back-channel UART interface but I think this requires special connections to the target that I do not have. Do I have any options that use very little memory that would allow me to store debug information? I just need to send two long ints each cycle.
Upon further inspection (the design was not originally mine), I notice that the "special connections to the target" required for the MSP-FET430UIF (simply to the UCA0RXD and UCA0TXD pins on the target micro) do exist, but the signals are converted to RS-485 using transceivers on the interface board (a test fixture) and the target board. Perhaps I can use the FET430UIF backchannel UART after all, though I have yet to find good instructions on how to do that. If anyone here has experience doing this and will be able to offer guidance, it would be very helpful.