IAC-IMX6-Kit Linux Function and Test Manual
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1.Run[gpio]test program [gpio_test]
./gpio_test
It shows the following print information:
Illustration: [gpio_test <device> 0] set [gpio] high level and low level
[gpio_test <device> 1] obtain gpio level
2.
GPIO on J16, J31 is without external signal, execute:
./gpio_test /dev/qiyang_imx6_gpio 0
As the above picture shown, set each [gpio] to low level, use