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AWR1642: How to flash AWR1642 without TM4C1294NCPDT ?

Moretti Matthieu
Prodigy 20 points
Part Number: AWR1642
Other Parts Discussed in Thread: TM4C1294NCPDT, UNIFLASH
Hello,
We work with the AWR1642 BOOST EVM and we plan to integrate the AWR1642 in a custom board.

We are able to flash the system in the EVM but through the TM4C1294NCPDT (and XDS110 firmware) which won’t be present in our custom board. So if we understand properly, what append in EVM is :
According to this document :
We should be able to flash the MCU R4F, the TI DSP and te radar through UART :
So we tried to flash AWR1642 by bypassing  TM4C1294NCPDT using uniflash and by connecting UART wires directly to pin 5 and 7 of J6 connector on EVM :
But the connexion failed, SOP were in flash Mode (101) and we have welded Resistors R169 and R166 in J6 connector.
 
Can we Flash the AWR1642 system without TM4C1294NCPDT ?
                If yes, can we test it on the EVM ?
Why does EVM use JTAG to flash AWR1642 system and not UART like it’s specified in the AWR1642 Bootloader Flow documentation ?
 
Thank you,
Best regards,
Matthieu
  • 0
    TI__Mastermind 30165 points

    Hello,

    I am very sorry for the delayed response. Yes, you can flash through UART without the TM4C MCU. The EVM uses UART to flash, not JTAG. The TM4C acts as a USB to UART converter.

    How did you try to flash through the UART pins when it didn't work? You should be able to connect to the UART pins (n5, n6) using a USB to RS232 converter like this:

    Then you can flash through UniFlash the same way you normally would.

    Regards,

    Adrian

  • 0 in reply to aozer
    Prodigy 20 points

    Hi Adrian,

    Thank you for your answer,

    « How did you try to flash through the UART pins when it didn't work? You should be able to connect to the UART pins (n5, n6) using a USB to RS232 converter like this: »

    We tried to flash with an USB to RS232 converter equivalent to the one you propose. We were connected to pin 5 and 7 of J6 connector on EVM.

                

    SOP jumpers were in flash mode (101) and Resistors R169 and R166  were soldered.

    Then we tried to flash one time with R129 and R128 soldered and another time desoldered.

    In both configurations, we obtain this error on uniflash :

    [ERROR] Cortex_R4_0: Initial response from the device was not received. Please power cycle device before re-flashing.
    [ERROR] Cortex_R4_0: Not able to connect to serial port. Recheck COM port selected and/or permissions.

    We checked and no others application is using the COM port while we try to flash.

    Another point is  since R169 and R166 has been soldered we are not able to flash through USB anymore.

    Do you have any idea of what we are doing wrong ?

     

    Thank you,

     

    Regards,

     

    Matthieu

  • 0 in reply to Moretti Matthieu
    TI__Mastermind 30165 points

    Hello,

    Can you provide the part number for the USB to UART converter you are using?

    Regards,

    Adrian

  • 0 in reply to aozer
    TI__Mastermind 30165 points

    Hello,

    Due to inactivity I will be closing this thread. If your issue persists, please create a new thread.

    Regards,

    Adrian