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This may be a serial setup problem. Make sure you have specified no hardware handshake on the terminal emulator setup. From: Jim Jackson <> To: Sent: Thursday, September 29, 2011 12:41 PM Subject: Re: [ts-7000] Re: TS-7250 seems inoperative On Thu, 29 Sep 2011, Mike Dodd wrote: > I confirmed that the serial port on the Linux box can talk to the > USB-serial cable on the laptop at 115 kbps -- minicom on Linux, HyperTerm > on Windows. Good data in both directions, one key at a time from the > other end. > > HOWEVER, neither 7250 will log me in on the serial port. I see the > standard boot-up messages, but there is NO response when I type 'root' at > the login prompt. This is very odd. It _looks_ as if you have some sort of localecho set on minicom, and a fault in the Terminal -> 7250 serial connection. Terminal emulators can be set to display the keys you press, this is useful when connecting to a serial device that does not echo. > Here is a link to the full minicom session > <http://mdodd.com/files/minicom_7250.txt> and here is a link to the > Telnet session <http://mdodd.com/files/telnet_7250.txt>. from this Platform: TS-7250 Board (ARM920T) Rev A Copyright (C) 2000, 2001, 2002, 2003, 2004 Red Hat, Inc. RAM: 0x00000000-0x02000000, [0x00051570-0x01ff9000] available FLASH: 0x60000000 - 0x62000000, 2048 blocks of 0x00004000 bytes each. == Executing boot script in 0.100 seconds - enter ^C to abort RedBoot> fis load vmlinux RedBoot> exec -c "console=ttyAM0,115200 root=/dev/mtdblock1" Someone has made it difficult to rescue this! 0.1sec to press control-C is pushing it. Someone has set a timeout of 1, probably thinking that was 1sec, instead 0.1sec. I'd do an fconfig and set a timeout of at least 20 (2secs). If you can reboot, and repeatedly press Control-C you should get to a Redboot prompt (you may have to do it a few times). From there you can manually boot the board doing this... fis load vmlinux exec -c "console=ttyAM0,115200 root=/dev/mtdblock1 init=/bin/sh" This boots the board straight into a shell with nothing else running. From the shell you can sort things out and fix any problems. Mind you, if I'm right and there is something wrong with the serial link to the board, you'll never get in to the RedBoot prompt. > The tail-end of the minicom session, showing the serial login attempt and > messages resulting from Telnet activity looks like this: Given you can get in via telnet as root, maybe you can confirm that what is running, and check that the correct getty is running on /dev/ttyAM0 > > ---------------- > Starting telnetd... > Starting apache.../www/apache/bin/apachectl start: httpd started > > Technologic Systems TS-LINUX/arm 7.0 > operator login: root [NO RESPONSE ON SERIAL PORT] > > THIS SHOWED UP WHEN I LOGGED INTO THE 7250 USING TELNET---> login[81]: root login on `pts/0' > > ls -l [NO RESPONSE ON SERIAL PORT] > > THIS SHOWED UP WHEN I ISSUED 'SHUTDOWN -H NOW' ON TELNET ---> login[82]: root login on `pts/0' > > INIT: Switching to runlevel: 0 > INIT: Sending pro? > The system is going down NOW !! > Sending SIGTERM to all processes. > INIT: no more processes left in this runlevel > Sending SIGKILL to all processes. > System halted. > ---------------- > > I'm stumped. Why won't either 7250 log me in on the serial port? > > --- Mike > > > __._,_.___
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