MFGTOOL烧录时串行口无打印

[jhp1234]

有个问题请问一下，我们用MFGTOOL通过USB烧录时串行口完全没有打印消息，虽然烧录后系统能跑，但这个工具在使用时里面也运行了LINUX，应该系统启动时一样有打印，现在就是没有，是什么原因？

CPU是IMX6Q, 用的LTIB L3.0.35_4.1.0, MFGTOOL也是对应的,MFGTOOL依赖的UBOOT,KERNEL 相应LOG功能也是打开的, UBOOT 启动命令如下这个样子：

#define CONFIG_BOOTARGS "console=ttymxc0,115200 rdinit=/linuxrc "\
"enable_wait_mode=off"

[Rita_Wang]

Are you using the i.MX6Q sdb board from NXP or the board you design yourself?

[Rita_Wang]

[Rita_Wang]

How about your setting for the uart port?

[jhp1234]

I use a SecureCRT for uart terminal, it connects the imx6 uart1,  it works well for debug, the configures like this:

but the mfgtool has no any comX at PC, the PC os is win10, it's affected by os?

[jhp1234]

Or it need a windows driver?

[Rita_Wang]

You can try to use the putty I am using

[jhp1234]

OK, but I can't see any serial port on PC.

[Rita_Wang]

Have you interface your board to PC, and change the boot mode to download mode?

[jhp1234]

Yes, in the screenshot, the mfgtool is connected to device and in download mode.

[Rita_Wang]

How about the uart port connect?

[jhp1234]

the imx6 uart1 connects to PC for normal boot debug as a terminal, it can see log.  The putty or secureCRT  has no log when mfgtool downloading, whatever the uart1 connects to PC or not.

[jhp1234]

the uart connects to com7, it cann't see any log, but it's OK when normal boot.

[Rita_Wang]

Have you set the proper uart port parameters? It seems that the uart is working now.

[jhp1234]

Yes, the uart works well when device booting.