FRDM-K64F losing program after power off

[jasondark]

I am using the FRDM-K64F for a senior design project. I am programming the controller using KDS and processor expert by way of OpenSDAv2 from the segger website. I am programming the microcontroller with low level components instead of using the specified freedom board library. When I disconnect the board after debugging, the program only works until it loses power a second time. Any idea why it will not stay programmed indefinitely?

[giacomopetrini]

I had this kind of problem when using the default bootloader (from mbed.org).
Installing the JSegger bootloader solved the problem. And it is also much faster.

Best Regards

Giacomo

[jasondark]

I thought I was using the segger loader, do you have a link to the one you are using? It's from the segger website I assume.

[BlackNight]

There is an option in the Processor Expert (CPU component) to disable EZPORT:

You could give that one a try.

Erich

[jasondark]

I tried this.. it still would not solve the problem.

[Amit_Kumar1]

Hi Jason

In the selected processor expert component can u check if u have selected Flash or RAM for coding. By default the processor expert selects RAM so In that case, it can erase the program on POR. Try selecting Flash .Hope it helps

Regards

Amit

[Hui_Ma]

Hi Jason,

Does that issue be fixed? What's your FRDM-K64F board hardware version?

Please check the FRDM-K64f board errata file.

Have a great day,
Ma Hui

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[BlackNight]

I'm aware of a booting problem with the EZPORT enabled. Maybe this is your issue?

See

FW does not run without SW1 reset after PowerOn

FRDM-K64F booting issue when powered from USB port

Erich

[jasondark]

After reading through the past threads, it is possible to make a software fix for this, correct? My question, is it as simple as changing a value in the flash configuration settings (per a reply to "FRDM-K64F booting issue when powered from USB port") or do I need to mess with the NMI and have it setup something (also mentioned in the post) Right now, I took all of the button inputs and used them for test inputs, thus disabling the NMI; however, enabling the NMI is not an issue, I guess I just do not fully understand what should be my end goal. Should I just read up more on the EZPORT mode in the reference manual?