• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 1 answer
  • Subscribers 78 subscribers
  • Views 1022 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

MSP432E401Y: MSP432E401Y

MSP432E411Y: How to program via UART0 and ROM bootloader without BSL Rocket

Sven Probst
Expert 1630 points
Part Number: MSP432E411Y
Other Parts Discussed in Thread: MSP-EXP432E401Y

Dear TI-Expert,

to enable our customers and FSEs to perform a firmware update of our product we have to use a connection to UART0 of an MSP432E411Y. All other communication channels of the processor are not accessible. We want to use the ROM bootloader such that even unprogrammed processors can be accessed.

Using the BSL rocket is not a good option, because customers will very likely loose it. (And it is hard to get one.) A standard USB to UART adapter was used with an earlier version of our product (using a processor of another manufacturer).

I already read the Bootloader (BSL) Scripter User's Guide and tried to program our hardware via UART0 on PA0/PA1 (Pads V3/W3) without success: "No response bytes received from BSL!"

I [Edit: no longer] assume this is due to not using the BSL rocket, but a standard converter. The hardware connection is working OK.

Edit1: I had a closer look at the signals with an oscilloscope. The USB to serial adapter is sending 0x55 at 115200bit/s as expected. But I don't see any reaction from the MSP432E411. (I cleared the processor before by script-> mass erase in CCS's debugger thus the ROM bootloader should work.)

Should the processor give a response??

How can I program the device via UART0? LMFlasher??

After the device is once programmed: Is ROM_UpdateUART the right command to jump into the ROM boot loader? I didn't find any example for the MSP432E. (There was something for TM4C129, especially I remember some example code jumping at a special location to enter the ROM bootloader as it would do after a mass erase ...)

Please help us finding a solution, soon!

  • 0
    TI__Mastermind 22580 points
    Hello Sven,

    I will look into this and get back by end of this week. Apologize for the delay!

    Regards,
    Sai
  • 0 in reply to Sai Reddy
    TI__Mastermind 22580 points
    Hello Sven,

    Apologize for the delay!

    You can use BSL Scripter to upload firmware. Using BSL Rocket is not a requirement. I used the XDS110 on MSP-EXP432E401Y LaunchPad (without using BSL Rocket) and was able to upload blinky.txt file using ROM Bootloader.

    Thanks,
    Sai
  • 0 in reply to Sai Reddy
    Expert 1630 points

    Hello Sai,

    thank you for your answer. Could you send or post the BSL Scripter script, such that I can try it on our hardware?

    Thank you in advance!

  • 0 in reply to Sven Probst
    TI__Mastermind 22580 points

    Hello Sven,

    The script is pretty much the same. You will have to point to the right COM port and file to update.

    Anyway here is the one I used.

    LOG
MODE E4xx UART 115200 COM53
RX_DATA_BLOCK_32 blinky_MSP_EXP432E401Y_nortos_ccs.txt
REBOOT_RESET

    Thanks,

    Sai

  • 0 in reply to Sai Reddy
    Expert 1630 points

    Hello Sai,

    I was able to reproduce your experiment with the eval board. But I'm still not able to get it running with a regular USB to serial adapter (FTDI 3V3). The only difference I can see in the waveforms is, that the processor's TX is high before programming with FTDI, but not with the XDS110 UART. Is the ROM bootloader doing any tests on the RX or TX pins?

  • 0 in reply to Sven Probst
    Expert 1630 points

    Hello Sai,
    I tried some more things. The only reason for the FTDI adapter not being working seems to be a slightly higher jitter on the signal edges. I think we have to use a flash based boot loader with fixed baud rate.

**Attention** This is a public forum