Hi Guys,
I am porting usb host tty device driver on uboot. I just use usb
usb_bulk_msg to communicate with modem. I met the following problems.
Could you please help me resolve the following issue? Thanks in advance.
When I use usb usb_bulk_msg to connect one USB modem, send one AT
command (e.g. AT) to Modem, and can receive a responding message, e.g.,
OK and so on.
But When I want to use usb usb_bulk_msg to receive the RING command from
modem without sending any AT command to modem, I could not receive any
data from modem, even NAK, STALL cannot be received. Then program
timeout. But if I send ATA, the can answer the incoming call.
I do not know how to receive the data from modem, when host did not send
AT command to modem.
Even I use usb_submit_int_msg, I only receive NULL.
WHY?
Thanks & Best regards,
Steven Wang
-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
Don't miss this year's exciting event. There's still time to save $100.
Use priority code J8TL2D2.
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
_______________________________________________
U-Boot-Users mailing list
U-Boot-Users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/u-boot-users
