topic usb_device 32 to 64 bytes in Kinetis Microcontrollers

usb_device 32 to 64 bytes

CCandido — Mon, 21 Oct 2013 19:32:34 GMT

Hi,

" KINETIS_50MHZ_SC_03\kinetis_50MHz_sc\k20d50m_sc_baremetal\build\cw\usb_device " example.

changing packet bytes 32 to 64?

EP_IN_Transfer(EP2,CDC_OUTPointer, 32 ); to EP_IN_Transfer(EP2,CDC_OUTPointer, 64 );

question 02:

have option ( INF ) set com port ( in Windows ) example ( install port number COM128 ) ?

thanks,

Carlos.

Re: usb_device 32 to 64 bytes

Kan_Li — Tue, 22 Oct 2013 03:04:12 GMT

Hi Carlos,

I am sorry but I don't understand your questions, so would you please provide a detailed description for them? Thanks in advance!!

Have a good day!!

B.R

Kan

Re: usb_device 32 to 64 bytes

CCandido — Tue, 22 Oct 2013 09:32:21 GMT

Hi kan,

usb_device CDC example packet size = 32 bytes

how to:

modify package size 32 bytes to 64 bytes?

thanks,

Carlos.

Re: usb_device 32 to 64 bytes

Kan_Li — Wed, 23 Oct 2013 03:40:22 GMT

Hi Carlos,

The packet size can be modified by changing the definition in usb.h. For example, EP0_SIZE.

Hope that helps,

B.R

Kan

Re: usb_device 32 to 64 bytes

CCandido — Thu, 24 Oct 2013 09:26:09 GMT

Hi Kan,

What do I see acotece modified.

#define EP0_SIZE 64// 32

#define EP1_SIZE 64// 32

#define EP2_SIZE 64// 32

#define EP3_SIZE 64// 32

0x40 bMaxPcketSize

See

buffer[] = 64 bytes....

EP_IN_Transfer(EP2,CDC_OUTPointer, 64 ); 01 not SEND buffer to PC

EP_IN_Transfer(EP2,CDC_OUTPointer, 64 ); 02 SEND buffer to PC = 64 bytes ok

only the second time it sends the packet.

void EP_IN_Transfer(uint8 u8EP,uint8 *pu8DataPointer,uint8 u8DataSize) ( usb.c ) <----

Thanks,

Carlos.