Kernel update through serial port.

Phil Quiney PQuiney at
Tue Sep 16 02:44:58 CDT 2008

If you want to use kerrmit from Linux then I recommend you install the 'ckermit' package. (I wasted a lot of time trying to get kermit to work in minicom, nothing I tried worked. 'kermit' was faultless)
Anyway, not only is the kermit client robust but the terminal emulation is better than minicom.
You just need a .kermrc in your HOME directory - something like...
set line /dev/ttyS0
set speed 115200
set carrier-watch off
set handshake none
set flow-control none
set file type bin
set file name lit
set rec pack 1000
set send pack 1000
set window 5
..and you are done.
Phil Q
Phil Quiney, Senior Software Engineer
Trinity Convergence
Cambridge Business Park
Cowley Road
Cambridge CB4 0WZ, UK
T: +44(0)1223-435536
F: +44(0)1223-435560 <> 



From: at [ at] On Behalf Of Joshua Hintze
Sent: 15 September 2008 17:48
To: 'Deepak Shankar-TLS,Chennai.'; davinci-linux-open-source at
Subject: RE: Kernel update through serial port.

I actually used Hyperterminal in windows at the time for Kermit transfer. It just started working right away. I haven't done Kermit transfer in minicom. I'm sure somebody can clue us in.




From: Deepak Shankar-TLS,Chennai. [mailto:deepaks at] 
Sent: Monday, September 15, 2008 11:46 AM
To: Joshua Hintze; davinci-linux-open-source at
Subject: RE: Kernel update through serial port.


Hi Josh,


Thanks a lot for  update.

I am trying the kermit mode - I did the following


EVM # loadb

Ready for binary (kermit) download to 0x80700000 at 115200bps


Then in my minicom I did a Ctrl-A Z and choose the uImage in location /uImage


After this there is no more activity in the EVM# prompt.


Should the uImage be put in some specific path or so?





From: Joshua Hintze [mailto:joshh at] 
Sent: Monday, September 15, 2008 9:59 PM
To: Deepak Shankar-TLS,Chennai.; davinci-linux-open-source at
Subject: RE: Kernel update through serial port.

I'm not sure about the Davinci (I haven't tried yet). But on other projects, using the Gumstix processor, I was able to transfer the kernel using Uboots Kermit serial protocol. I would think you could do the same for U-boot.




From: at [ at] On Behalf Of Deepak Shankar-TLS,Chennai.
Sent: Monday, September 15, 2008 10:38 AM
To: davinci-linux-open-source at
Subject: Kernel update through serial port.




I'm a newbie to both Linux and davinci.

Could someone tell me if its possible to update the U-Boot and the Kernel through the serial download.

My target board does not have an Ethernet port and it would not be possible to me to do a tftp on it. 

So the only possibility is JTAG, and I'm interested in onfield upgrades.


Please note, I'm not referring to the booting Linux from UART- but to update the U-boot and the Kernel present in the NAND through UART.

Do  we have to do some tailoring in the U-boot coming with the standard dvevm.

Any other pointers are greatly welcome



Deepak Shankar V



The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only.
It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions presented in 
this email are solely those of the author and may not necessarily reflect the opinions of HCL or its affiliates.
Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of 
this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have 
received this email in error please delete it and notify the sender immediately. Before opening any mail and 
attachments please check them for viruses and defect.



-------------- next part --------------
An HTML attachment was scrubbed...

More information about the Davinci-linux-open-source mailing list