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Original question:

CC2652R: Direct Hardware ISR routine on interrupt hit(before TI-RTOS)

CC2652R: CC2652R

Ivan Sojic
Prodigy 50 points
Part Number: CC2652R

Hi,

In the SysCfg It is mentioned: "In Three Pin mode, the user is responsible for controlling the slave select line."

In the documentation I could not find any further description. 

What above comment means in detail?  How the implementation shall be done?

Thanks,

Ivan

  • 0
    TI__Guru**** 217007 points

    Hi Ivan,

    You can find more commentary in the SPI.h TI Drivers Runtime API File Reference.  Using three-pin mode is equivalent to a software chip select, thus the application needs to handle the chip select assertion and de-assertion for the proper SPI peripheral.  For master mode this would mean toggling a GPIO output when the slave needs to be asserted.  For slave mode it would be necessary to enable/disable the SPI peripheral based on the condition of a GPIO input.

    Regards,
    Ryan