KL15 Locked - Bootloader Development - Need Help

[petertwiss]

Hello,

I was working with another FWE, and we have seems to 'bricked' our KL15, which working on our custom bootloader. We're looking to figure out a method of unlocking the device.

Here are some details:

- Using Processor Expert v10.4, and adding a flash_LDD component and configured more or less standard with adding a new extra functions from the methods options

- Exporting PE Project to Keil.

- During an attempted write and restart, the device has no SWD Communication.

- Using the JLINK Cmd Prompt, the SWD is not available: **See Attached Pic: 'unnamed.jpg"

- Attempting to hold reset down while writing the device I get this message in Keil: **See attached Pic: "Keil.jpg"

Any idea what happened? Did we overwrite a special place in flash?

Is this chip toast?

Here are some other details from the other FWE:

"I was working on adding a small region above the flash configuration section .cfmconfig in the scatter file to contain app version info at  fixed location. The location was 0x410 (flash config at 0x400) and I moved the .text region up by 0x40 bytes to make room for the new region which was mostly a copy of this:"

#define FlashConfig_start               0x00000400

#define FlashConfig_size                0x00000010

...

LR_FlashConfig FlashConfig_start FlashConfig_size  {

  ER_FlashConfig FlashConfig_start FlashConfig_size  { ; load address = execution address

   .ANY (.cfmconfig)

  }

}

Please help us if you can thanks,

-Peter

[Hui_Ma]

Hi Peter,

Could you provides KL15 Flash configuration field value?

And if it is possible, could you provide the KL15 SWD interface related circuit also?

Thank you for the attention.

Have a great day,
Ma Hui

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[petertwiss]

Hello Ma Hui,

For SWD:

- Using JLINK Base, 1.8V logic, See Attached picture.

- nRst jump is populated, and no pullups or pulldowns are on.

- System worked flawlessly before we started working with the flash and killed it.

For Flash Config:

-I am sorry but I will need some guidance on how to find those things. We use PE (Driver Suite 10.4) to export into Keil, and then this project has it's specific settings.

- **See 2nd picture attached, is this what you wanted? If not please send more detail to I can get you what you need.

Thanks Mu Hui,

-Peter

[Hui_Ma]

Hi,

1. About SWD interface, your attached SWD debug interface is different with Freescale recommended at pin numbers order.

For you could program and debug the KL15 chip before, I think that's ok.

Below is Freescale recommended SWD debug interface:

2. For you are using the Processor Expert v10.4, I would you could provide the Flash configuration field value.

Please check below picture as a reference:

Thank you for the attention.

Have a great day,
Ma Hui

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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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