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If your new filesystem/kernel doesn’t work and you don’t know why, or you are unable to resuscitate your patient using the ADAM2 FTP server it may be time to pop inside and do some debugging. Without the console port, you have very little idea of what’s going on between the bootloader passing control to the kernel and the web configuration utility loading. The kernel could be corrupt, environment variables incorrect, or the file system not mounting.  Console Connector The NB5 has a four pin connector (J4) which provides a console debug port. Pin 1 of J4 is shown of the left of the above photo (black wire). Using this asynchronous serial port, you can gain access to the bootloader and watch the kernel/userland apps load. This port is a 3V3 volt CMOS asynchronous port running at 38,400bps 8N1. ADAM2 Bootloader Commands The ADAM2 Bootloader provides the following commands. The printenv command is an advantage over the ADAM2 FTP server allowing the dumping of all variables.
ADAM2 Revision 0.22.02
(C) Copyright 1996-2003 Texas Instruments Inc. All Rights Reserved.
(C) Copyright 2003 Telogy Networks, Inc.
Usage: setmfreq [-d] [-s sys_freq, in MHz] [cpu_freq, in MHz]
Memory optimization Complete!
Adam2_AR7RD >
Press any key to abort OS load, or wait 5 seconds for OS to boot...
Adam2_AR7RD > help
Commands Description
-------- -----------
h/help Displays the commands supported
info Displays board information
memop Memory Optimization
setmfreq configures/dumps the system and cpu frequencies
erase Erase Flash except Adam2 Kernel and Env space
printenv Displays Env. Variables
setenv Sets Env. variable <var> with a value <val>
unsetenv Unsets the Env. variable <var>
fixenv Defragment for Env. space
go Loads the image starting at address
Netcomm NB5 - Sample Boot For the inquisitive, here is the NB5 booting as captured from the console port. ADAM2 Revision 0.22.02 (C) Copyright 1996-2003 Texas Instruments Inc. All Rights Reserved. (C) Copyright 2003 Telogy Networks, Inc. Usage: setmfreq [-d] [-s sys_freq, in MHz] [cpu_freq, in MHz] Memory optimization Complete! Adam2_AR7RD > Press any key to abort OS load, or wait 5 seconds for OS to boot... Launching kernel decompressor. Starting LZMA Uncompression Algorithm. Copyright (C) 2003 Texas Instruments Incorporated; Copyright (C) 1999-2003 Igor Pavlov. Compressed file is LZMA format. Kernel decompressor was successful ... launching kernel. LINUX started... Config serial console: ttyS0,38400 CPU revision is: 00018448 Primary instruction cache 16kb, linesize 16 bytes (4 ways) Primary data cache 16kb, linesize 16 bytes (4 ways) Number of TLB entries 16. Linux version 2.4.17_mvl21-malta-mips_fp_le (khcheng@atmos2) (gcc version 2.95.3 20010315 (release/MontaVista)) #12 Tue Aug 31 18:43:49 SGT 2004 Determined physical RAM map: memory: 14000000 @ 00000000 (reserved) memory: 00020000 @ 14000000 (ROM data) memory: 007e0000 @ 14020000 (usable) On node 0 totalpages: 2048 zone(0): 2048 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: the pacing pre-scalar has been set as 600. calculating r4koff... 000b71b0(750000) CPU frequency 150.00 MHz Calibrating delay loop... 149.91 BogoMIPS Freeing Adam2 reserved memory [0x14001000,0x0001f000] Memory: 6312k/8192k available (1477k kernel code, 1880k reserved, 119k data, 60k init) Dentry-cache hash table entries: 1024 (order: 1, 8192 bytes) Inode-cache hash table entries: 512 (order: 0, 4096 bytes) Mount-cache hash table entries: 512 (order: 0, 4096 bytes) Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes) Page-cache hash table entries: 2048 (order: 1, 8192 bytes) Checking for 'wait' instruction... unavailable. POSIX conformance testing by UNIFIX Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket Starting kswapd Disabling the Out Of Memory Killer devfs: v1.7 (20011216) Richard Gooch (rgooch@atnf.csiro.au) devfs: boot_options: 0x1 pty: 32 Unix98 ptys configured Serial driver version 5.05c (2001-07-08) with no serial options enabled ttyS00 at 0xa8610e00 (irq = 15) is a 16550A ttyS01 at 0xa8610f00 (irq = 16) is a 16550A block: 64 slots per queue, batch=16 Using the MAC with internal PHY PPP generic driver version 2.4.1 avalanche flash device: 0x400000 at 0x10000000. Physically mapped flash: Found 1 x16 devices at 0x200000 in 16-bit mode Amd/Fujitsu Extended Query Table v1.0 at 0x0040 number of CFI chips: 2 Looking for mtd device :mtd0: Found a mtd0 image (0x90000), with size (0x160000). Looking for mtd device :mtd1: Found a mtd1 image (0x10000), with size (0x80000). Looking for mtd device :mtd2: Found a mtd2 image (0x0), with size (0x10000). Looking for mtd device :mtd3: Found a mtd3 image (0x1f0000), with size (0x10000). Looking for mtd device :mtd4: Creating 4 MTD partitions on "Physically mapped flash": 0x00090000-0x001f0000 : "mtd0" 0x00010000-0x00090000 : "mtd1" 0x00000000-0x00010000 : "mtd2" 0x001f0000-0x00200000 : "mtd3" NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP, IGMP IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 512 bind 512) Linux IP multicast router 0.06 plus PIM-SM ip_conntrack version 2.0 (64 buckets, 512 max) - 364 bytes per conntrack ip_tables: (c)2000 Netfilter core team netfilter PSD loaded - (c) astaro AG NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. NET4: Ethernet Bridge 008 for NET4.0 VFS: Mounted root (squashfs filesystem) readonly. Mounted devfs on /dev Freeing unused kernel memory: 60k freed serial console detected. Disabling virtual terminals. console=/dev/tts/0 init started: BusyBox v0.61.pre (2004.03.30-19:34+0000) multi-call binary Starting pid 9, console /dev/tts/0: '/etc/init.d/rcS' Standard Configuration File proc write:Calling Configuration Number of State module = 1 STATE = 1 STATE = 2 STATE = 3 module = 2 STATE = 1 STATE = 2 module = 3 STATE = 1 STATE = 2 STATE = 3 module = 5 STATE = 1 STATE = 2 STATE = 3 module = 6 STATE = 1 STATE = 2 STATE = 3 Elements = 14 Total Length = 116 Using /lib/modules/2.4.17_mvl21-malta-mips_fp_le/kernel/drivers/net/avalanche_us b.o USB: Entering USB_init_module. vid = 0x6ea pid = 0x5 No Serial Number String present. man = Texas Instruments prod = TI RNDIS Network Adapter USB: Entering USB_Init. USB: Leaving USB_Init. USB: Leaving USB_init_module. Using /lib/modules/2.4.17_mvl21-malta-mips_fp_le/kernel/drivers/atm/tiatm.o registered device TI Avalanche SAR Initializing DSL interface size=10120 size=38720 size=46304 size=45312 Texas Instruments ATM driver: version:[4.02.04.00] Waiting for enter to start '/bin/sh' (pid 35, terminal /dev/tts/0) Please press Enter to activate this console. Sep 8 12:00:07 cm_monitor: Monitor Starting SIOCGIFFLAGS: No such device Sep 8 12:00:07 cfgmgr(pppoa-103): Valid Configuration Tree Sep 8 12:00:08 cfgmgr(fdb): Firewall NAT service started create:0 text2atm:0 Communicating over ATM 0.0.35 setsockopt SO_SNDBUF: (0) Success assign:0 SIOCGIFFLAGS:0 SIOCGIFFLAGS:0 Sep 8 12:00:09 cfgmgr(bridge): Bridge Created: br0 device nas0 entered promiscuous mode br0: port 1(nas0) entering learning state Sep 8 12:00:09 cfgmgr(bridge): Bridge Interface Added: nas0 device eth0 entered promiscuous mode br0: port 2(eth0) entering learning state device usbrndis entered promiscuous mode Sep 8 12:00:09 cfgmgr(bridge): Bridge Interface Added: eth0 Sep 8 12:00:10 cfgmgr(bridge): Bridge Interface Added: usbrndis br0: port 3(usbrndis) entering learning state br0: port 1(nas0) entering forwarding state br0: topology change detected, propagating br0: port 2(eth0) entering forwarding state br0: topology change detected, propagating br0: port 3(usbrndis) entering forwarding state br0: topology change detected, propagating DSL in Sync Sep 8 12:00:17 cfgmgr(sar): DSL Carrier is up Sep 8 12:00:17 pppd[85]: pppd 2.4.1 started by root, uid 0 |