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.
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.
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.
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
Your request has been assigned to a HW engineer and he will answer your question promptly.
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.
我們使用 iMX258 processor.
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.
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.
Retrieving data ...