Pardon the newbie question.. I'm trying to send out a 16-bit SPI command via the USCI via two 8-bit writes, but the slave device keeps telling me it didn't get 16 bits of data. I'm sure I'm doing something wrong.. my code:
SetSPISlaveSelect(DevAddr); // Chip Select off USCI_A_SPI_transmitData(SPI_BASE, *(pBuf)); while(USCI_A_SPI_isBusy(SPI_BASE)) ; pDummy[0] = USCI_A_SPI_receiveData(SPI_BASE); USCI_A_SPI_transmitData(SPI_BASE, *(pBuf+1)); while(USCI_A_SPI_isBusy(SPI_BASE)) ; pDummy[1] = USCI_A_SPI_receiveData(SPI_BASE); SetSPISlaveSelect(SPI_SLAVE_NONE); // Chip Select OFF nFoo = (pDummy[0] << 8) | pDummy[1];
.. I can see a brief burst on my scope, but the scope is super-cheap and I can't see the individual pulses. The USCI is in 8-bit mode so it's not just sending out 14 bits.
Am I doing something wrong here?
All help appreciated!
Ed Averill
