FRDM-KL27Z kboot

[neilhancock]

HI, is there a way of getting the FRDM-KL27Z to enter the kboot.

From the KL27Z ref manual I thought it was holding the NMI /SW1 down after Reset, but I can't seem to get that to work.

thanks

[Jorge_Gonzalez · Accepted solution]

Hello Neil Hancock:

Try entering the KBOOT USB HID mode with these steps:

1. Connect a USB cable from your PC to the J10 mini-USB connector on FRDM-K27Z.

2. Press and hold the reset button (SW2).

3. Press and hold the NMI button (SW1).

4. Release the Reset button (SW2).

Then you can also release the NMI button.

If you have not reprogrammed the default FOPT configuration in Flash, then with the steps above the KL27 should enumerate as USB HID device and stay in bootloader mode.

I hope this helps.

Regards!,
Jorge Gonzalez

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[neilhancock]

Many thanks - that worked for me. I thought I had tried all those steps to begin with - and for some reason that time it didn't work.

But its done it nicely now, and responded to

Kboot\FSL_Kinetis_Bootloader_1_2_0\bin\win\blhost.exe  -u -- get-property 17

Inject command 'get-property'

Response status = 0 (0x0) Success.

Response word 1 = 0 (0x0)

Flash Security State = UNSECURE

blhost.exe  -u -- get-property 7

Inject command 'get-property'

Response status = 0 (0x0) Success.

Response word 1 = 7535 (0x1d6f)

Available Commands = flash-erase-all, flash-erase-region, read-memory, write-memory, flash-security-disable, get-property, execute, reset, set-property, flash-erase-all-unsecure

and kudos to the developers for adding a JSON option

blhost.exe -u -j -- get-property 7

{

   "command" : "get-property",

   "response" : [ 7535 ],

   "status" : {

      "description" : "0 (0x0) Success.",

      "value" : 0

   }

}