5272 USB

[AK47]

Hello,
I have a 5272 USB question. I have proprietary board with 5272 USB D+ and D- connected to a SMC Hub chip. While debugging one particular board, I see that when Host sends a message to the CF via the hub, sometimes the OUT token is neither ACked nor NAKed. The Host sends out the same packet again and consequently I get two EOT's from the Coldfire. I do not see this issue when I circumvent the hub. But before I get the hub manufacturers involved , I wanted to know
1) On what conditions can the 5272 neither send out a NAK or an ACK?
2) Why do I get two EOT's?
Thanks in advance for any insight.
-Narayan AK

[AshwinBhamburka]

Hi,

Im also using the MCF5272 processor for application development. My aim is to build Host-Client application utility which communicates with MC5272 via USB.

Im using the HOST end application software as available on the Freescale web-site. I just want to send one byte info from Host to client and maybe get back a Acknowledge back from the client end. Just wanted to know if i can readily use the 'Testsuite.exe' application directly or may be with some changes incoorporated to it. I just want to send '1-byte data' from Host(PC) to client(MC5272).

Can you guide me some insight on this.

The host application im talking about is available on freescale web-site, the file name is  'USBHOSTSW.zip'

Thanks in advance.

Regards,

Ashwin.