problems with serial console
Hi,
I had successfully ported u-boot-1.1.1 for MPC8260 based custom SBC. Every thing is fine.
I want to thank Mr. Wolfgang Denk and all the people who contributed to u-boot.
My interested is to boot Linux on this board. I downloaded linux-2.6.6. I followed EST8260 board in the kernel and made changes accordingly for my board.
I did not add board define in "arch/ppc/boot/simple/embed_config.c" because u-boot-1.1.1 passes clock speed in
Hz and so as the kernel versions from 2.4.5 (DULG FAQ) accepts in Hz.
After successful compilation. I tried to boot the kernel. Here I am encountering problem with serial console.
We are using serial port on SMC
u-boot baud rate is set at 115200. I am using hyper terminal for serial console.
Before booting the kernel, my display is ok. I can interact with the console normally
After uncompressing the image and before loading the Linux. Many characters are skipped, And display can not be interpreted.
I tried to change the baud rate using "setenv baud rate 9600". But u-boot in hanging.
I am pasting the text capture for your reference.
kindly help in overcoming this Issue. Does reducing baud rate helps?
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
n ro2.(rhus cvso .. 0327(elwDgLnx303222_) 3TuJn2 00:0IT20 Cre ehSC20Pr
O oe0ttlae:378 M oe 26 ae,LF ac:
Nra oe ae,LF ac:
HgMmzn:0pgs IObth1 ul oeit
Kre omn ie osl=tS,120cnoety ot/e/a w I ahtbeetis 04(re 0 12bts Wrig eltm lc em tc!Mmy13kvll(0kn d 4kdt,5kii,0 ihe)
lri l o...91oMSerchhhaeni:64(re:4 53 ye)neaea b te 12(re:3 26 ye)otaea al nre:52(re:0 06bts
S nrn sigb NFXccniigi iaststncoac o kaitd
enit my4krdixoT0oLu26
cthovalmo ir1
RMSdv iaz:6Adko49Ksz 04bokie
Thanks in advance.
Suresh Chandra Mannava.
Quoted 3 lines · In message <[email protected]> you wrote:
I want to thank Mr. Wolfgang Denk and all the people who contributed to u-boot.
You are welcome.
Quoted 3 lines
I did not add board define in "
arch/ppc/boot/simple/embed_config.c" because u-boot-1.1.1 passes clock speed in
Hz and so as the kernel versions from 2.4.5 (DULG FAQ) accepts in Hz.
Are you sure you know exactly what you are doing?
Quoted 2 lines
After successful compilation. I tried to boot the kernel. Here I am encountering problem with serial console.
Ummm.... I'm afraid I have to point out that this is off topic onthe U-Boot mailing list.
Quoted 2 lines
After uncompressing the image and before loading the Linux. Many characters are skipped, And display can not be interpreted.
This is aconfiguration problem with your serial ports and console in Linux.
Quoted 1 line
kindly help in overcoming this Issue. Does reducing baud rate helps?
This has nothing to do with the baudrate.
Best regards,
Wolfgang Denk
Signature · 4 lines
Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de Just because your doctor has a name for your condition doesn't mean he knows what it is.
Quoted 10 lines
Quoted 5 lines
I did not add board define in "
arch/ppc/boot/simple/embed_config.c" because u-boot-1.1.1 passes clock speed in
Hz and so as the kernel versions from 2.4.5 (DULG FAQ) accepts in Hz.Are you sure you know exactly what you are doing?
I got the thing correct. Problem is I selected the SCC console driver in Linux Kernel.
Now I deselected that option. Linux is booting smoothly.
Once again I thank all the u-boot community for their support.
Regards,
Suresh Chandra Mannava