MSPM0G1507: Flash the firmware using JLink without invoking BSL

Hi,

You can use SWD directly, and connect PA18 and GND. In this situation, you will never enter into BSL.

I used SWD pins as mentioned above , But PA18 is always required? like before I connected to VDD 

Hi,

If you use Jlink to download or debug something, I think you can ignore BSL. But once you re-power, if you want to run your self code, please put PA18 to GND, or it may run into BSL mode.

Other way is to disable BSL or change BSL invoke pin. You can change it in NONMAIN(Sysconfig NVM part).

Regards,

Zoey

Hi,

I connected the board to the JLink programmer following TI’s guidelines for hardware connections. I initially used the JFLASH tool to program but encountered a connection error.

To work around this, I shorted the PA18 pin to VCC before powering on the board, which invoked the BSL mode. Once in this mode, I was able to successfully establish a connection between JLink and the board and proceed with the flash programming.

But I don't want that, I'm thinking that I don't want any short in the hardware,

Note: I disabled the SWD pins in my application code(DL_SYSCTL_disableSWD());, but the POR re-enabled the SWD pins, correct?

Does MSPM0G1507 MCU need any sequence to flash with jlink or script etc

Observation: Whenever I program with jlink, the MCU should reset and halt but it doesn't, the MCU resets but the application starts immediately instead of halting.

Hi,

Vivek Chitte said:

To work around this, I shorted the PA18 pin to VCC before powering on the board, which invoked the BSL mode. Once in this mode, I was able to successfully establish a connection between JLink and the board and proceed with the flash programming.

It is because you have entered into low power mode, where J-link can not connect it. And once you run into BSL mode, it will wake up ,and re-enter into low power mode after around 10s.

Please follow below step to solve it.1106.How to connect MCU in low power mode with J-link.pptx

Vivek Chitte said:

Note: I disabled the SWD pins in my application code(DL_SYSCTL_disableSWD());, but the POR re-enabled the SWD pins, correct?

Yes, you POR will re-enable SWD, but then MCU will run the code and SWD will be disabled again. You J-link will not connect it also.

Regards,

Zoey

Hi

Thank you, after I made the above changes, I can connect my board with JLINK, I doubt if this will make the read protective.

Hi,

Glad to hear you have resolved this issue.

The old version J-link has lost the function to wake up MCU so it can not connect it and that's way I give the script of this. And the newest version of JFlash has supported this.

Hi Zoey,

what about read protection because any one can use this script and try to read the hex file.

Hi,

We only have SWD access register to protect.

You disable SWD in Nonmain.

Hi 

Can we protect that from the compiler setting?

Thank you for help, I have one more question about to how to disable BSL PA18 pin and use for general purpose operation. I will create new topic for same.