Kinetis MicrocontrollersのトピックRe: K-70 USB Device CDC

K-70 USB Device CDC

VGS — Fri, 20 Apr 2012 19:11:16 GMT

Dear all,

I am working with Kinetis K-70(TWR-K70F120M + TWR-LCD) Tower module using CWDS ver10.2 with windows-7 OS

I have try to work USB Device CDC application using Kinetis 120MHz bare metal sample code (KINETIS_120MHZ_SC) and USB Stack ver_3.2

I got an error message in both sample code

--------------------------------------------------------------------------

USB Device Not Recognized

One of the USB device attached to this computer has

Malfunctioned, and windows does not recognize it.

--------------------------------------------------------------------------

But MQX ver3.8 USB Device CDC sample code is working fine

We need bare metal sample code

Please suggest what could be the solution for the above error?

Thanks,

Prabhu.S

ndavies — Sat, 21 Apr 2012 04:10:45 GMT

I just went throught this on a K60 application. Check the allocation of the BDT table. It must be on a 512 boundary.

The following lines (9-10) in USB.c are wrong.

#pragma data_alignment=512

tBDT tBDTtable[16];

CW10.x does not support that pragma.

I had to change the line to

tBDT tBDTtable[16] __attribute__ ((aligned(512));

PaoloRenzo — Wed, 25 Apr 2012 04:23:46 GMT

Have you tried K70 DFU software? That one is bare metal and I tested like 3 weeks ago without problems.

bataliero — Thu, 29 Oct 2020 09:00:00 GMT

I had same problem on TWR-k60 but

__attribute__ ((aligned(512)); solved problem;

btw there is typo , last bracket is missed.

should be :

tBDT tBDTtable[16] __attribute__ ((aligned(512)));