AWR1642BOOST: CAN-FD Transmit doesn't work

Hello,

I have already asked related questions here.According to the recommendations, there has been some progress now.But I still have some problems.

Now when running the CANFD demo, the oscilloscope can measure the differential voltage waveform between CANH and CANL.As shown below:

Q1: Although there is an output waveform, once the host computer initializes PCAN-USB, the waveform disappears.

Q2: How do I calculate the parameters in the Bit rate Input box in the TI CAN Visualizer GUI? How to correspond to the parameters in the SDK code below？

    /* Configuring 1Mbps and 5Mbps as nominal and data bit-rate respectively
        Prop seg: 8
        Ph seg 1: 6
        Ph Seg2 : 5
        Sync jump: 1
        BRP(Baud rate Prescaler): 2

        Nominal Bit rate = (40)/(((8+6+5)+1)*BRP) = 1Mhz

        Timing Params for Data Bit rate:
        Prop seg: 2
        Ph seg 1: 2
        Ph Seg2 : 3
        Sync jump: 1
        BRP(Baud rate Prescaler): 1

        Nominal Bit rate = (40)/(((2+2+3)+1)*BRP) = 5Mhz
    */

Thanks,

eehzux