We have a baseband board for a wireless communications device which contains an MSP430F5436 and a TMS320VC5507. The MSP provides the serial interface and the DSP provides the radio interface. The two devices are connected via a DSP McBSP and an MSP USCI. We also have serveral other GPIO and interrupt lines available between the two devices. What is the best way to implement a packet-type interface between these two devices? We are thinking SPI, but then which device should be the master and which should be the slave? Is there any sample code available for either of these devices as an SPI slave?
Cheers, Bob Heise