How to realize Test Led Lamp based on QtE4.7

This article mainly explains "how to achieve test Led light based on QtE4.7", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's train of thought slowly in depth, together to study and learn "how to test Led light based on QtE4.7"!

Based on QtE4.7, the development board of iTOP-4418

Enter the command "vi etc/init.d/rcS" in HyperTerminal to switch to qtopia startup, as shown in the following figure.

After reboot, use the command "mknod / dev/sda1 b 8 1" in HyperTerminal to create the device section of the U disk.

Point.

As shown in the following figure, use the command "mount / dev/sda1 / mnt/udisk/" to mount the U disk.

As shown in the following figure, modify the permissions of the test program. In HyperTerminal, enter the modify permission command "chmod 777 LEDs"

In HyperTerminal, enter the run command "leds-qws", as shown in the following figure.

The running result is shown in the following figure, and the led light of the development board can be controlled by LED1.

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