I just had the same problem today. In our case, turning off CR/LF and only sending ^M helped.
As to why only some commands get run twice: The longer commands stops the serial port polling long enough that uboot drops the the LF after getting the CR. The shorter ones finish faster, and the last character gets interpreted as a nev return.
-----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net] On Behalf Of Jeff Angielski Sent: Thursday, March 11, 2004 17:41 To: u-boot-users Subject: [U-Boot-Users] Command line parsing question
u-boot-1.0.0/MPC8260 custom board
When I type in commands at the command prompt and hit enter, some of the commands are getting run twice.
For instance, version gets run twice while an md runs only once.
=> version version
U-Boot 1.0.0 (Mar 11 2004 - 12:24:15) =>
U-Boot 1.0.0 (Mar 11 2004 - 12:24:15) => md 0x0 1 md 0x0 1 00000000: ff000000 .... =>
One thing to note about my setup is that I am accessing the serial console using telnet over a remote serial devices server. So the whole telnet end-of-line issue and the processing of CR,LF, and NUL come into play.
Snooping the network and watching the character counts on the seriver server's serial port, I can see that each time I hit <Enter> there are two characters going over the serial line (CR-LF or CR-NUL) to the target.
My questions are:
- Has anybody else encountered this problem? I already
googled for an answer but came up with nothing.
- Does anybody have any idea why some commands are working
and others are not? I would expect that either all would be repeated or none of them would be repeated.
Thanks, Jeff
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