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MK64FN1M0VMD12 freescale freedom bootloader (FSL 1.0.2) with WinUpdater issue (Over serial)t

Question asked by Nitin Harish on Oct 17, 2014
Latest reply on Oct 20, 2014 by Mark Butcher



I am facing an issue (CPU resetting) with MK64FN1M0VMD12 freescale freedom bootloader (FSL 1.0.2) and WinUpdater communicating over Serial port.


K64's boot loader boots up fine and when I ping it from Winupdater it gets into "bootloader_run" which is expected but then after a little while CPU resets.


When I say ping from Winupdater what it means is (I have disabled erasing and writing flash functions from Winupdater code) after I press "Update" button on Winupdater GUI (This is for debugging only) it just sends a serial ping message.


I have verified K64 receives the serial ping message and gets into "bootlader_run" function (verified with IAR IDE) but after that it takes <= 5-6 seconds and the CPU resets.


Any ideas ?

HW: I-JET Probe (JTAG)

SW: IAR IDE v7.20, FSL 1.0.2 (Freescale Boot loader for MK64FN1M0VMD12), Winupdater (FSL 1.0.2)