i.MX ProcessorsのトピックRe: USB Signal verification and NAND stress test

USB Signal verification and NAND stress test

yslin — Thu, 23 Jan 2014 07:09:36 GMT

Hi ,

We wanna do USB signal verification ,so , have a small program to output USB test patent.

And we wanna do NAND flash R/W test, so, have a small program for NAND R/W test.

Thanks.

Re: USB Signal verification and NAND stress test

YixingKong — Mon, 10 Mar 2014 08:34:04 GMT

Your questions are not clear. Pease repeat your questions here again and state what you want. You can write your question in Chinese if you want.

Thanks,

Yixing

Re: USB Signal verification and NAND stress test

yslin — Mon, 10 Mar 2014 08:53:04 GMT

Hi Yixing,

我需要去測試 NAND flash 的 read /write 和 USB 2.0 device 的訊號測試.

NAND Flash 要做 1 bit R/W 的穩定度測試.

USB 有eye diagram 測試, 需要device 端送出訊號.

High Speed Eye

Re: USB Signal verification and NAND stress test

YixingKong — Tue, 11 Mar 2014 03:28:58 GMT

Your request has been assigned to a HW engineer and he will answer your question promptly.

Regards,

Yixing

Re: USB Signal verification and NAND stress test

arthur_lai — Tue, 11 Mar 2014 07:02:56 GMT

Hi YS,

Can you please let us know which i.MX processor you are using?

In general, for USB test, you can go to www.usb.org to download a HSET tool to set a USB device into test mode.

Thanks,

Arthur

Re: USB Signal verification and NAND stress test

yslin — Thu, 13 Mar 2014 14:21:03 GMT

Hi Ming,

我們使用 iMX258 processor.

Thanks.

Re: USB Signal verification and NAND stress test

arthur_lai — Fri, 14 Mar 2014 02:59:00 GMT

Hi YS,

Besides using HSET tool from usb.org, you can also force i.MX25 USB PHY into various test modes by set PTC bits on PORTSCx register. For detail, please refer to Figure 47-36 and Table 47-33 on the reference manual.

Thanks,

Arthur

Re: USB Signal verification and NAND stress test

YixingKong — Thu, 20 Mar 2014 07:19:35 GMT

Had your issue got resolved? If yes, we are going to close the discussion in 3 days. If you still need help, please feel free to reply with an update to this discussion.

Thanks,

Yixing

Re: USB Signal verification and NAND stress test

israelpz — Thu, 20 Mar 2014 17:08:07 GMT

Hi,

For perform a NAND write/read you could use the boot loader which Freescale provide with the i.mx25(u-boot or redboot)

The instructions are here for redboot:

Flash memory (CM-i.MX27) - BlueWiki

If you want to check and verify the R/W signals you need to solder cables in the pads and perform a R/W then check with a logic analyzer and compare against the signals in the data-sheet of the NAND manufacturer.

Regards,

-Israel.

Re: USB Signal verification and NAND stress test

YixingKong — Fri, 21 Mar 2014 06:46:18 GMT

Had your issue got resolved? If yes, we are going to close the discussion in 3 days. If you still need help, please feel free to reply with an update to this discussion.

Thanks,

Yixing

Re: USB Signal verification and NAND stress test

yslin — Fri, 21 Mar 2014 11:03:50 GMT

Yes，Thanks.