David Mort

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8 years, 11 months ago.

KL25Z does not mbed enable

I hold down the reset button and plug in the KL25Z and is recognized as E:\BOOTLOADER. I can drag & drop the latest firmware revision onto the KL25Z and the file appears. 20140530_k20dx128_kl25z_if_opensda.s19

When I power cycle the KL25Z it still appears as E:\BOOTLOADER (without holding down the reset button). The firmware file is now gone. Green lights blinking.

Rinse & repeat, same results. Using Windows 7 Professional. Using Freescale Xtrinsic-Sensors-EVK evaluation kit.

Just loaded a LPC11U24 onto my account with no problems. Any suggestions?

Question relating to:

Last updated: 30 Apr 2020
firmware, KL25z

Same is the case with my board as well. I really can't find a solution on any of the forums.

posted by Amit Dhamne 21 Dec 2015

I verified the reset button is okay, removed the shield, and tried updating (and reverting) the firmware. The board will only enumerate as BOOTLOADER (if I hold down the reset while plugging in). When I drag an drop (any) firmware file onto the E:/BOOTLOADER drive, green status light indicates an error (Bootloader Error 2 seconds off followed by 8 rapid on/off blinks). I can read/connect with the four files on E:\BOOTLOADER ( FSL_WEB, LASTSTAT, SDA_INFO, TOOLS) however it does not seem willing to accept any driver update. Linking to the SDA_INFO site always shows (& never changes): Board Name is: FRDM-KL25Z MicroBoot Kernel Version is: 1.03 Bootloader Version is: 1.05 Application Version is: 0.00

In bootloader idle mode, I do get the steady green on/off blinking light (Blinking: 500ms on, 500ms off). Tried to run the mbed Windows serial driver after loading the firmware file for mbed and it will not detect, nor can I 'see' the board unless of course it is in bootloader mode. Still not able to use the board. Any other suggestions?

posted by David Mort 26 Dec 2015

Okay, I found that I had not extracted the .S19 file and once I did, able to recognize as an mbed device. I had been dragging & dropping the compressed file onto the E:\BOOTLOADER drive which would explain the error status on the KL25Z. Problem solved.

posted by David Mort 26 Dec 2015

2 Answers

Wim Huiskamp
8 years, 11 months ago.

Maybe the reset button is stuck low or perhaps the shield holds the reset low at startup. Check the button and remove the shield.

Paul Staron
8 years, 11 months ago.

I had much the same problem on Windows 7, try one of the earlier firmware's from this page, I think I had to use the pre Windows 8.1 version, original firmware.

https://developer.mbed.org/handbook/Firmware-FRDM-KL25Z