K-70 USB Device CDC

[VGS]

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

[bataliero]

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)));

[ndavies]

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]

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