Bluewater Systems Support Forum - Snapper 9260

I2C Voltage Level Problem: < 2.0V (17 replies)

pteh — Thu, 06 May 2010 21:36:39 -0600

Hi,

I'm running into a problem with physical I2C voltage level.

See the following scenarios. I'm using QSK9260.

Scenario 1:
1. Power Cycle
2. Boot from NAND
3. I2C pins during boot-up reads < 2.0V
4. Soon, still during boot-up, it bumps back to 3.3V (NOTE: sometimes it stays < 2.0V)
5. Once it reached 3.3V, issuing reboot in shell login, issuing reset in u-boot prompt and pressing reset switch on QSK board, I2C voltage level always read 3.3V. I won't see point 3 above
6. If power cycle again, it goes back to point 3

Scenario 2:
1. Power Cycle
2. Enter U-Boot prompt
3. Boot from NFS Server
4. I2C Voltage Level always read < 2.0V
5. Issuing reboot in shell login, issuing reset in u-boot prompt and pressing reset switch on QSK board, I2C voltage level always read < 2.0V
6. Power Cycle and repeat from point 2 above doesn't help

Is there something going on during NAND boot? Can you please tell me if there is a GPIO pin/register in Snapper 9260 that needs to be set during boot-up to bring I2C voltage level to 3.3V?

There is no data transmitted on the above scenarios.

Regards,

pteh

U-boot flash partitions (2 replies)

Stephen — Wed, 17 Mar 2010 21:35:03 -0600

Hello,

With the U-Boot bootloader that is preloaded on Snapper 9260 board, how do I list all partitions that are on flash? Is there a way to split the filesystem partition into multiple partitions from u-boot?

Thanks.

MAC Address unique for all Snapper 9260 modules? (1 reply)

pteh — Tue, 02 Mar 2010 17:52:38 -0700

Hi,

Is the MAC address assigned in Snapper 9260 unique for all Snapper modules? i.e. Can I safely assume I will not find two Snapper 9260 modules having the same MAC address coming out from manufacturer when I order in quantity?

Regards,

pteh

initialize SD card after boot - sort of hot plug (2 replies)

IGW — Fri, 12 Mar 2010 19:09:30 -0700

Hi all,

SD card works fin on my '9260 (2.6.29 kernel) if the card is plugged in an power to the SD card slot is enabled at boot. However, our app wants to be able to control the power to the SD slot - using simple p-channel switch.

I can't figure out, though, how I can get the card initialized after enabling power so I can mount it. dmesg reports:
mmc0: error -110 whilst initializing SD card
this is not surprising.

What I want to know is how I can subsequently force linux to rescan the slot and initialize the card after we enable power?

Thanks,
Ian

Details on audio clock output (14 replies)

IGW — Thu, 11 Feb 2010 16:00:55 -0700

Hi all,

We are interested in using the Line-in inputs to sample a few audio signals.

Easy enough but we need to ensure good time alignment between these audio samples and bunch of other signals sampled by our hardware. We need better than 0.5 seconds over 12 hours - so better than about 11 ppm maximum average sampling clock error.

I assume that the oscillator providing the audio sampling clock has a pretty loose tolerance - +/-100 ppm maybe?

Alternatively we may be able to use the 18.432 MHz output from the Snapper in some fashion.

Two questions:
1) Is there any data on how clean this 18.432 MHz clock is? Jitter/phase noise? How is it generated? Is the original source a clean crystal and what happens in-between (just nice clean divisions, or is there a "noisy" PLL in the way)?

2) Are there any details available on enabling this clock output on PC1 under Linux.

Many thanks,
Ian

telnetd fails to allow incoming connections (2 replies)

robin szemeti — Mon, 07 Sep 2009 16:46:29 -0600

im getting;

root@snapper:/bin$ telnetd -F
telnetd: ptsname error (is /dev/pts mounted?): No such file or directory
telnetd: can't create pty

any clues?

ethernet termination (3 replies)

Glenn — Thu, 10 Sep 2009 02:33:06 -0600

Hi Bluewater,

Could you please let me know if the Snapper 9260 board has the ethernet termination resistors fitted for the receiver. I note that the Quick start kit has them fitted for the Tx on the Quick start carrier board. I can't seem to find any Rx terminators on the carrier board or within the Pulsejack connector.

Regards,

Glenn

boot fails (1 reply)

Lance — Fri, 28 Aug 2009 13:34:35 -0600

My 9260 QSK suddenly stopped booting. Nothing at all prints to the terminal and the power LED does not come on. However, there is 5V at pins 2 and 60 of the expansion header so there is some power getting to the board and the 5V regulator works. The system worked one night and the next morning, without begin moved or changed, it wouldn't boot.
Thanks,

Lance

NANDRNB use? (1 reply)

pteh — Mon, 24 Aug 2009 14:31:08 -0600

Hi,

What is pin NANDRNB use for?

Regards,

3V3_OK_N which GPIO? (1 reply)

pteh — Sun, 23 Aug 2009 21:57:11 -0600

Hi,

Pin 94 or 3V3_OK_N, which GPIO is it connected to in AT91SAM9260? Do I have to drive it?

Regards,

Mount of USB disk fails (2 replies)

pas — Mon, 31 Aug 2009 09:32:36 -0600

I have hooked up the USB host port as described in the FAQ section and my USB flash drive is recognized but I can't mount the file system. When the drive is detected I get the following in dmesg:

usb 1-1: new full speed USB device using at91_ohci and address 7
usb 1-1: configuration #1 chosen from 1 choice
scsi3 : SCSI emulation for USB Mass Storage devices
scsi 3:0:0:0: Direct-Access USB DISK 2.0 PMAP PQ: 0 ANSI: 0 CCS
SCSI device sda: 31277056 512-byte hdwr sectors (16014 MB)
sda: Write Protect is off
sda: assuming drive cache: write through
SCSI device sda: 31277056 512-byte hdwr sectors (16014 MB)
sda: Write Protect is off
sda: assuming drive cache: write through
sda: sda1
sd 3:0:0:0: Attached scsi removable disk sda

All looks good so I then try to mount the drive:

root@snapper:~$ mount /dev/sda1 /mnt
mount: mounting /dev/sda1 on /mnt failed: No such device or address

Both /dev/sda1 and /mnt exist and the USB is formatted as ext2.

Any clues?

Thanks,

Pete

Need Pull-Up Resistors for I2C interface? (3 replies)

pteh — Mon, 17 Aug 2009 01:01:50 -0600

Hi,

When using I2C interface on Snapper 9260, do I still need to supply pull-up resistor to VDD externally?

I can see there are 3 x I2C devices already on the board which make me assume there is no need to supply pull-up resistors externally. Please correct me if I'm wrong.

Thanks.

How to load U-Boot when there is no U-Boot? (1 reply)

pteh — Tue, 11 Aug 2009 17:09:26 -0600

Hello,

Can you tell me how to load U-Boot if the board doesn't have U-Boot?
(either corrupted during upgrade or accidently deleted from any operation)

May be there is a JTAG connection/device that works together with Snapper 9260 / QSK9260?

Thanks.

MCLK (1 reply)

IGW — Mon, 10 Aug 2009 22:44:40 -0600

To save me the (somewhat error-prone) task of trolling through the code or probing on the QSK header pins, is someone able to tell me what the MCLK rate is on the 9260 module?

I am working through the revised timing settings I need in the SMC for chip select CS2 to ensure it interfaces with our FPGA.

I need to know what the MCLK rate is for an "as-shipped" Snapper 9260 so I can work out how many clock cycles to add for each phase of the bus cycle(s).

Many thanks,
Ian

how to use host port (1 reply)

lajmi — Mon, 08 Jun 2009 21:05:16 -0600

I have a quik start with a Snapper 9260,
I need to connect a mass storage device to the board
The probleme is that QUICKSTART doesn't provide a usb host jack
Can you help me to find a interface between an usb device and the host port of the Snapper 9260

OpenEmbedded machine file (2 replies)

tom — Mon, 01 Jun 2009 16:02:09 -0600

I'm curious what the Bluewater Systems machine file for the Snapper9260 looks like.

I've got

TARGET_ARCH = "arm"
...
require conf/machine/include/tune-arm926ejs.inc

and it seems to work.

ipkg Segmentation Fault (5 replies)

tom — Fri, 05 Jun 2009 20:15:31 -0600

Somehow I manged to break ipkg. Now when I try to install anything I get "Segmentation Fault". Have you encountered this before? There's got to be a simple way to restore ipkg to a simple state.

Here are some examples:

root@snapper:~$ ipkg-cl install helloworld
Installing helloworld (1.0.0-r0.2) to root...
Downloading [192.168.1.104]
Segmentation fault

I switched OpenEmbedded to tune with machine/include/tune-arm926ejs.inc, so now I'm working with armv5te. I brought down my repository for a moment so the Snapper couldn't download anything (/etc/ipkg.conf still references armv4t):

root@snapper:/home/root$ ipkg-cl install helloworld_1.0.0-r0.2_armv5te.ipk 
Clearing state_want and state_flag for pkg=helloworld (arch_priority=0 flag=16 want=2)
Installing helloworld (1.0.0-r0.2) to root...
Downloading [192.168.1.104]
wget: cannot connect to remote host (192.168.1.104): No route to host
Segmentation fault

Then I changed /etc/ipkg.conf from armv4t to armv5te:

root@snapper:/home/root$ nano /etc/ipkg.conf 
root@snapper:/home/root$ ipkg-cl install helloworld_1.0.0-r0.2_armv5te.ipk 
Clearing state_want and state_flag for pkg=dropbear (arch_priority=0 flag=256 want=2)
Clearing state_want and state_flag for pkg=libc6 (arch_priority=0 flag=256 want=2)
Clearing state_want and state_flag for pkg=libgcc1 (arch_priority=0 flag=0 want=2)
Clearing state_want and state_flag for pkg=libz1 (arch_priority=0 flag=0 want=2)
Clearing state_want and state_flag for pkg=nano (arch_priority=0 flag=256 want=2)
Clearing state_want and state_flag for pkg=ncurses (arch_priority=0 flag=0 want=2)
Clearing state_want and state_flag for pkg=ntpdate (arch_priority=0 flag=256 want=2)
Clearing state_want and state_flag for pkg=tzdata (arch_priority=0 flag=256 want=2)
Installing helloworld (1.0.0-r0.2) to root...
Segmentation fault

root@snapper:/home/root$ ipkg-cl list_installed
dropbear - 0.51-r1.01.2 - 
libc6 - 2.6.1-r16.2 - 
libgcc1 - 4.3.3-r4.1.2 - 
libz1 - 1.2.3-r5.2 - 
nano - 2.0.7-r0.2 - 
ncurses - 5.4-r16 - 
ntpdate - 4.2.2p3-r1.2 - 
tzdata - 2007k-r4.2 - 
update-rc.d - 0.7-r1.2 - 
Successfully terminated.
root@snapper:/home/root$ helloworld 
Hello world!

Weird stuff here. It finally installed helloworld, but the install process still ended with a segmentation fault. Something is definitely awry with ipkg. By the way, I have the same problem when trying to install other packages too. Just curious if you've encountered this before, or have any ideas. I'm not very familiar with ipkg.

Snapper9260 and Quickstart Kit initial boot (14 replies)

tom — Tue, 19 May 2009 16:24:20 -0600

I've got a Snapper 9260 (bag labeled "SN9260 Rev1 Industrial Temp") and a Quickstart Kit (board labeled "SHARK Rev 1 Feb 2008). It's plugged in to my network switch, and the serial port is plugged in to my null modem cable. I have minicom running at 115200 8N1. When I apply 6v, the board doesn't seem to fully boot.

Here's what I get when I apply 6v:

Hit any key to stop autoboot:  0                     
Snapper>

Ok, looks like something is interrupting u-boot. That is one problem...

If I hit the reset button it gets farther:

RomBOOT                                     
>Start Snapper 9260 Bootstrap...                     


U-Boot 1.1.6 (Mar 10 2009 - 11:23:19)

Processor:        AT91SAM9xx Series
Core Speed:       180.07 MHz
Peripheral Speed: 90.03 MHz
External Crystal: 18.432 MHz
USB Speed:        48.08 MHz
Core:             ARM926EJS, version: 2
Internal SRAM:    8KB
RAM Configuration:                                                              
Bank #0: 20000000 64 MB                                                         
NAND:  256 MiB                                                                  
In:    serial                                                                   
Out:   serial                                                                   
Err:   serial                                                                   
Hit any key to stop autoboot:  0                                                
Initing power domains...                                                        
No FPGA on this module, or no FPGA init required                                
Usage:                                                                          
nand    - NAND sub-system                                                       
                                                                                
                                                                                
Loading from NAND 256MiB 3,3V 8-bit, offset 0x80000                             
   Image Name:   Linux-2.6.20-snapper-gc533fa03-d                               
   Image Type:   ARM Linux Kernel Image (uncompressed)                          
   Data Size:    1682868 Bytes =  1.6 MB                                        
   Load Address: 20008000                                                       
   Entry Point:  20008000                                                       
IP-Config: Complete:                                                            
      device=eth0, addr=192.168.2.200, mask=255.255.255.0, gw=192.168.2.254,    
     host=snapper, domain=, nis-domain=(none),                                  
     bootserver=192.168.2.25, rootserver=192.168.2.25, rootpath=                
yaffs: dev is 32505860 name is "mtdblock4"                                      
yaffs: passed flags ""                                                          
yaffs: Attempting MTD mount on 31.4, "mtdblock4"                                
yaffs: auto selecting yaffs2                                                    
block 1825 is bad                                                               
1 bad blocks total                                                              
VFS: Mounted root (yaffs filesystem).                                           
Freeing init memory: 316K

And it sits there forever. Never finishes booting.

This section raises questions:

Initing power domains...                                                        
No FPGA on this module, or no FPGA init required                                
Usage:                                                                          
nand    - NAND sub-system

Why does nand print usage? Is something configured wrong?

Also, it says NAND 256MiB. I thought the board was supposed to have 1GB, but maybe it's just not mounting the rest of it yet.

BTW, I've tried this with two 9260 boards so far (but just one Quickstart Kit), and get the same results.

I'm not sure what to do next. I figured it would boot to a linux login prompt like the quickstart guide shows. Any help and explanation would be appreciated.

Thanks

Tom

Polarity indication to power on the Snapper 9260 QS Kit (1 reply)

fab — Thu, 23 Apr 2009 15:49:54 -0600

About power inputs of the Quick Start Kit, besides being 6V, which is the polarity of the connector?