QY-IMX6S Linux Function And Test Manual
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QY-IMX6S-v1.x Gpio Start Testing...
Please check the following items:
①
Whether there is [/dev/qiyang_imx6_gpio node] in [/dev directory]
②
Whether the kernel configuration select [ <*> IMX6 GPIO TEST
FOR QIYANG BOARD].
2.5.
Serial Port Test
There are 5-ch serial ports: J6 is as the debug UART. The other 4-ch
could be used as the RS232 serial port.
COM1(J31) and COM2(J31) are 5 wire serial ports and multiplexes
with RS485 interface.
COM3(J2) and COM4(J2) is 3 wire serial ports.
This test program only aims at testing of common RS232.
The relations between serial port and hardware:
Serial Port
Hardware Location
Device Node
DBG
（
Debug
UART
）
J6
（
Rx
、
Tx
、
GND TO Pin 2
、
Pin1
、
Pin3
）
/dev/ttymxc0
COM1
J31
（
Rx
、
Tx
、
GND TO Pin11
、
Pin13
、
Pin9
）
/dev/ttymxc1
COM2
J31
（
Rx
、
Tx
、
GND TO Pin12
、
Pin14
、
Pin10
）
/dev/ttymxc2
COM3
J2
（
Rx
、
Tx
、
GND TO Pin1
、
Pin3
、
Pin5
）
/dev/ttymxc3
