code for SPI test for MSP430

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The examples can be downloaded at msp430.com, in the Code Examples tab.

However, using the MSP430 as a spi master: I have found it best to onl use the RX ISR, and leave the transmit interrupt off. SPI always transmits a byte when it receives a byte, so when you get a R interrupt it means both the transmit register is ready for another byte and the receiver buf has a byte ready for you to read out. And in thi case its best to start the transfer by writing to the TXBUFx. The transfe ends when the RX ISR doesnt put another byte into the TXBUFx.

You also need to consider whether your slave needs a chipselect to toggl states after every byte, or every 16bits or whatever. So the code to driv the SPI depends heavily on what the other side needs.

The example code on msp430.com website is a good basic start.