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McBSP-SPI interface of C5510-MSP430

Hello everyone,

I am undertaking interface of 04 nos C5510(McBSP) and MSP430(SPI ) with MSP430 as SPI master and the DSP as slave.

FSX receives CS/SS(active low) from MSP430 and other pins are connected as required

Configured McBSP for Clock stop mode

 

I have some queries regarding the McBSP configuration-

-Role of FREE, SOFT in SPCR2

-choice of FSRP

-choice of CLKXP/CLKRP/clksp-are they dont care

-choice of FSRM

-choice of GSYNC in SRGR2 (have chosen 1 for SRGR-McBSP synch)

- Do I have to enable DXENA bit of SPCR1 as McBSP2 of all 4 DSPs are sharing the same bus with the MSP430.

DXENA is enabled in case DX pins of multiple McBSPs are common, but I believe that is the case for McBSPs of the same DSP.