Kinetis MicrocontrollersのトピックRe: FRDM-K64F losing program after power off

FRDM-K64F losing program after power off

jasondark — Wed, 06 May 2015 13:43:47 GMT

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?

Re: FRDM-K64F losing program after power off

BlackNight — Wed, 06 May 2015 13:49:27 GMT

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

Re: FRDM-K64F losing program after power off

giacomopetrini — Wed, 06 May 2015 14:07:56 GMT

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

Re: FRDM-K64F losing program after power off

jasondark — Wed, 06 May 2015 14:18:47 GMT

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.

Re: FRDM-K64F losing program after power off

jasondark — Wed, 06 May 2015 14:25:57 GMT

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?

Re: FRDM-K64F losing program after power off

BlackNight — Wed, 06 May 2015 14:48:22 GMT

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

You could give that one a try.

Erich

Re: FRDM-K64F losing program after power off

jasondark — Thu, 07 May 2015 15:06:54 GMT

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

Re: FRDM-K64F losing program after power off

Hui_Ma — Thu, 14 May 2015 07:14:32 GMT

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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Re: FRDM-K64F losing program after power off

Amit_Kumar1 — Tue, 19 May 2015 06:24:14 GMT

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