Kinetis MicrocontrollersのトピックRe: k64 USB U-disk enumeration error

k64 USB U-disk enumeration error

omercaylan — Tue, 10 Nov 2020 08:16:19 GMT

hi, we desing custom pcb with k64, we are trying to communite via usb, when usb disk attached, i get USB_HostEventEnumerationFail, when i examine the signal with oscilloscope, i get such a signal. Do you have any idea about this problem ? ide : McuXpresso sdk : 2.8.2

Re: k64 USB U-disk enumeration error

danielchen — Fri, 13 Nov 2020 01:58:00 GMT

Hi omeroaylan:

Could you provide more information about your application , what changes did you make? what demo you are using?

Regards

Daniel

Re: k64 USB U-disk enumeration error

omercaylan — Tue, 10 Aug 2021 05:53:47 GMT

mcu : 144pin, MK64FN1M0VLQ12
we use external clock for usb and mcu. usb clk in : 47 - PTE26
we are only testing usb msd example.first we tested the code without any change on our circuit but did not work,
second we created a clean project for out 144 pin mcu and tested again(usb msd) but not a chance.
example working on nxp development board but not working our board. i want to know, is this usb signal correct ?
it works until this function( USB_HostEvent() ) and i get enumeration error.

Re: k64 USB U-disk enumeration error

bobpaddock — Fri, 13 Nov 2020 13:16:15 GMT

Do the OE pins have internal pull-ups? Such pins should not be floating.
The OSC could be randomly turning on and off.

Re: k64 USB U-disk enumeration error

omercaylan — Wed, 18 Nov 2020 13:55:02 GMT

actually i checked the OSCs. links like this. OSC output so I measure the clk voltage 5.1 volts, do you think this could be a mistake? OSC VDD 3.3v

Re: k64 USB U-disk enumeration error

danielchen — Mon, 23 Nov 2020 08:11:22 GMT

I would suggest you use USB analyzer to capture some USB packets.

Do you use OCARM or SDRAM as your first RAM in your project? Or DTCM as your first RAM?

Regards

Daniel

Re: k64 USB U-disk enumeration error

omercaylan — Mon, 07 Dec 2020 11:21:39 GMT

Problem Solved: the schematic was wrong, . i connect 5v to k64 Usb reg. it worked.