[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: RE : Re: Bricked Sheevaplug

Here is a message to wind down this thread.

The root cause of the problem with seeing the serial port was a bad Sheeva Power PLUG power supply.

I previously measured the no load voltage at 5.3 volts. I later measured the voltage under load at 3 volts. After unsoldering the power leads from the power supply circuit board and attaching the leads to an external 5 volts DC power supply the PLUG initialized and udev was able to dynamically create the ttyUSB0 serial line. OpenOCD was now able to see the JTAG port.

Since PLUG power supplies are noted for their faulty power supplies I will remove the power supply and replace it with a power jack to enable using an external power source.

When I ordered the PLUG from Globalscale they sent me the Power PLUG, v1.3 of the original PLUG. Globalscale did NOT provide the proper documentation, they included the doc for the original PLUG. The two are significantly different. I have not been able to find documentation for the v1.3 Power PLUG.


From: DrEagle <DrEagle@doukki.net>
To: Herman Swartz <herman_swartz@yahoo.com>
Cc: "debian-arm@lists.debian.org" <debian-arm@lists.debian.org>
Sent: Thursday, December 6, 2012 11:13 AM
Subject: RE : Re: Bricked Sheevaplug

I may had same problem with android mail.

I do not see another test to do.

May be a quick reset after power on could help.

I had one of my sheevaplugs with issues like yours.
The only way to get able to talk to it was something like undocumented failsafe recovery.

I just remember playing with reset while power on the sheevaplug.

Hope this will help.

Herman Swartz <herman_swartz@yahoo.com> a écrit :

I am using Yahoo mail. Do not see any way to stop TOFU.

try just
# modprobe ftdi_sio

Herman: No difference

You mean notinh about jtag or nothing at all ?

root@raspberrypi:/lib/udev/rules.d# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.

You ma try to :
add you user to the dialout group

Herman: Using as root

verify openoce rules (/lib/udev/rules.d/60-openocd.rules)
# Marvell Sheevaplug
ATTRS{idVendor}=="9e88", ATTRS{idProduct}=="9e8f", MODE="664", GROUP="plugdev"
Must be present !

Herman: Verified this line is in openocd rules.

Reply to: