The OpenWrt serial port is occupied and the program cannot read the serial port data

q397064399

I set the baud rate with the program, but the data sent by the serial port was intercepted, and the program I wrote myself could not receive the serial port information at all

The serial port information sent in the past is executed as a shell command, and the serial port data sent by the program can be received by the PC
How can I solve this serial communication problem?

q397064399

I checked the boot process of linux, and it seems that when the computer is turned on, uboot will pass the information to the kernel, and then the kernel has been occupying the serial port

S rain, cold S_ wind and snow

It's not okay to change putty or something like that

q397064399

S Qin Yu Han S_ Wind and Snow Posted on 2014-8-15 16:59
It's not okay to change putty or something like that

It's not a matter of changing putty, it's that the serial port of the PC sends the routing information as a shell, and I want my application to receive it

q397064399

Tie-up  
Modify /etc/inittab  

####ttyS0::askfirst:/bin/ash --login
####ttyS1::askfirst:/bin/ash --login
Just comment out the bottom two lines

s_h_ě_n

Take a look at thishttp://blog.csdn.net/neiloid/article/details/7585876