Hi:
Looking into the datasheet of the B32, I found only ONE asynchronous serial port (SCI0).
The SPI interface is a serial interconnect interface but is it not equivalent to an RS232 serial port.
The B32 has also a J1850 byte data link communication (BDLC), which is not equivalent to an RS232 serial port, either.
DO you know which serial bootloader you have? Some serial bootloaders allow some serial port usage.
I recomment to get the BDM unit, because it will allow you to debug your application much easily, and you won't have to juggle the serial port with the bootloader. BMDs from P&E sell for about US$99, which is not a bad deal.
Regards,
Alex.