how to send a signal through a usb to a hardware device and make a LED glow

6 次查看（过去 30 天）

显示更早的评论

mahendra kumar 2012-4-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/36992-how-to-send-a-signal-through-a-usb-to-a-hardware-device-and-make-a-led-glow

how to send a signal through a usb port to a hardware device and make a LED glow

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Daniel Shub 2012-4-30

How is the LED connected to the usb port?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson 2012-4-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/36992-how-to-send-a-signal-through-a-usb-to-a-hardware-device-and-make-a-led-glow#answer_46271

USB is by definition a serial bus; any information sent over the bus is only present on the bus for a small fraction of a second. You thus cannot send and hold a signal via USB. Instead you would have to send data that the destination hardware interpreted as indicating the appropriate LED state.

There are suitable USB-compatible devices available: see http://www.mathworks.com/matlabcentral/answers/18366-how-to-send-a-signal-to-usb