Cannot boot Pandaboard OMAP4460 boot from uart

yong tang

I used following tool to do serial boot on windows 7 
http://github.com/nmenon/omap-u-boot-utils.git

then I get the information follows:

F:\source\omap-u-boot-utils>pserial.exe -p COM4 -f ..\pandaboard-es\u-boot-linaro-stable\MLO -v
s_open[87]:COM4
port COM4 opened fine!
s_configure[135]:115200 0 0 8
Configured fine
Waiting For Device ASIC ID: Press Ctrl+C to stop
s_read[256]:0028EEE0:1

and then nothing was output from the terminal, no asic id was detected. is there anything needed to config with uart ?

over 13 years ago

0 Gina Glaser over 13 years ago

TI__Expert 8055 points

Yong,

Are you trying to use COM4? Only UART3 is supported for UART peripheral boot. See Ch 27 in the OMAP4 TRM, available at http://www.ti.com/general/docs/wtbu/wtbudocumentcenter.tsp?templateId=6123&navigationId=12037#65

Regards,

Gina

0 yong tang over 13 years ago in reply to Gina Glaser

Prodigy 130 points

I've resolved this problem. I did not notice the switch on board for configing SYSBOOT pins.Default is booting from usb not uart3. Just switch it.

But another problem is after I download the MLO from uart, I cannot get anything output from uart . I have connected to uart3. I try to config the baudrate, stop bit, but still nothing.

0 Gina Glaser over 13 years ago in reply to yong tang

TI__Expert 8055 points

Yong,

Can you share your output from using pserial to load the x-loader? Does the same MLO work fine when booting from SD card?

Thanks,

Gina

0 Tushar Agrawal1 over 11 years ago in reply to Gina Glaser

Prodigy 20 points

I am having similar issues when trying on pandaboard ES.

Same MLO works from SDCard.

output from pserial -

C:\omap-u-boot-utils>pserial -p COM3 -f MLO
Waiting For Device ASIC ID: Press Ctrl+C to stop
ASIC ID Detected: OMAP 4440 with ROM Version 0x0701
ASIC ID Detected: 0x44 0x40 0x07 0x01
Sending 2ndFile:
Downloading file: 100.000% completed (34240/34240 bytes)
File download completed.

Processors

Processors forum

Cannot boot Pandaboard OMAP4460 boot from uart