QY-IMX6S Linux Function And Test Manual
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COM4
J2
（
Rx
、
Tx
、
GND TO Pin2
、
Pin4
、
Pin6
）
/dev/ttymxc4
Test Principle
：
Test program realizes that 1 serial port send character data
“
/dev/ttymxcx
" test string!
!
”
every other 1s, X is actual testing device node,
through multithreading way to block reading serial ports data and then
print.
Test Process & Result
：
When do serial ports testing, PC needs 2 serial ports
②
.One connect to debugging port for interaction
③
.One connect to under test ports to receive and transmit data
If there is only 1 serial port, port connect to under test ports , connect
development board by network cable. Through [telnet] function to log in
development system as debugging ports operation.
Development board defaulted IP address is 192.168.1.71. Click start
button on PC, select [RUN], then type [cmd] and click confirm.
