How can I use only 3 PWM High to control the DRV8301 on "instaspin" software

How can I use only 3 PWM High to control the DRV8301 on "instaspin" software.

in the sys_main.c, I modified the

// Send SPI commands to DRV8301 from HET
 hetRAM1->Instruction[2U].Data = 0x208;

But no effect.

Anything else that need to be change to that I do not know off?

Thanks