AWR1642BOOST: CAN-FD Transmit doesn't work

eehzux

Part Number: AWR1642BOOST

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

over 6 years ago

0 Raghunandan Kamath over 6 years ago

TI__Mastermind 22155 points

Hello Eehzux,

If you are using the CANFD test applciation you can use the default PCAN-View application that is available for the PCANUSB-FD to view the CAN messages.

The TI CAN Visializer application is only for the Object data over CAN (TI REX project). The bittiming values in this application are "Bit Rate " window.

However, in your current case(CANFD Test application), you need to just use the PCAN-View to validate the messages send from the device.

-Raghu

0 eehzux over 6 years ago in reply to Raghunandan Kamath

Prodigy 100 points

Hi Raghu,

1. I just use Object data over CAN (TI REX project), and the corresponding TI CAN Visializer application.But once the TI CAN Visializer initializes, the waveform disappears.

2. As shown below, I don't understand why the values written in these two places are different？ How should I convert these two values?