Hi Abhinand,
This board is designed to be connected to the MPC5777C-DEVB MCU controller board with a S32SDEV-CON18 PCIe cable.
How are you connecting SPIGen to the RDGD3100I3PH5EVB?
When you are trying to use SPIGen, you will need a GD3100 translator board. The translator board is required to convert the 3.3V levels used on the SPIGen KL25Z Freedom board to the 5V logic levels used on the RDGD3100I3PH5EVB. You will also need to wire the SPI outputs and some GPIO signals on the translator board directly to the S32SDEV-CON18 PCIe cable.
Please post a list of the hardware you are using and diagram of how you have SPI connected to the RDGD3100I3PH5EVB.
Best regards,
Tomas