CC2652R7: How to Change default CS pin Behavior to Other Manual CS Pin Multiple Slave Mode In SPI

Tool/software:

Here with Attached the image that get from four wire configuration in SPI. In this image, a CS pin is attached to Channel 0.Using the sysconfig file, the CS pin is set to the DIO29. In every 8 bit CS pin automatically high and low it does automatically when configure the SPI using code but I need to use this multiple slave mode. In ti resource explore, use spimaster. For example, used  another pin to master ready pin but i need to use only four..  pins. I can configure normal gpio for the otherCS pins for the slaves but how can i syncronise with the clock and do the enable  every 8 pulse to that gpio. Are there any easy methods to do it?

.