Linux/PROCESSOR-SDK-AM335X: UART boot unreliable

yingjie gu

Tool/software: Linux

Hi,

I have been using minicom to send u-boot.img through ymodem to am335x-evmSK for a while. My OS is ubuntu 1604 64bits. And I am using sdk 3.3.0.4. (I don't think the sdk matters). Sending u-boot-spl.bin through xmodem works very smoothy if I press the warm reset button as it indicates. But I notice that almost 2 out of 3 times, sending file through ymodem will fail. Although occasionally it works, but this is really annoying since I plan to use UART as initial programming of my custom board.

Is it because of lacking necessary configuration on minicom ? What causes the ymodem so unstable?

Thanks.

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi,

Can you try with picocom? There have been issues with minicom in the past.

0 yingjie gu over 8 years ago in reply to Biser Gatchev-XID

Intellectual 810 points

Hi Biser,

Thank you. I tried picocom, using this command

picocom -b 115200 /dev/ttyUSB1 --send-cmd "sx -vv"

ctrl-a, ctrl-s, then type the u-boot-spl.bin and u-boot.img.

Although it still needs to wait for a while to start loading u-boot.img, but it's more stable compared to minicom. I didn't encounter failure anymore.

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Linux/PROCESSOR-SDK-AM335X: UART boot unreliable