Dtr pin serial

You can check the first part of this article on how to identify your serial port. You can open the header file to see constants corresponding to other pins too. You can control both of them together also. You can compile the code rts. Please remember to execute code as root use sudo. One way to test out the code is to connect LED's to the serial port and observe.

If you are using a DB9 hardware serial port ,Please use an appropriate RS decoder chip or high value resistor. Back to Serial Programming Tutorials. Hi I downloaded your zip it works great, but when the program ends it loses the effect. How to edit the code such a way that when you last time press any key, the pins remain how they were set? Usually after you close the connection to your port by using close fd ; Linux frees the port so that other users can use it. Improve this question.

Fifi Fifi 2, 20 20 silver badges 40 40 bronze badges. DeviceIoControl this ioctl code. It is fairly risky, a driver might not implement it. Add a comment. Active Oldest Votes. Improve this answer. Mr Robot Mr Robot 8 8 silver badges 16 16 bronze badges. DCB dcb; I used the serial COM without handshake. I already remember the state of the pin each time I change it but it is not fully satisfying. Your answer is not clear and do not clarify my question.

Is it possible Yes or No? If yes, please provide an example code. The question doesn't give details on what the "not fully satisfying" situation is. Then no one will be able to answer.

And my answer is that unless you use another means, for example, an RSC line monitor, protocol analyzer, or oscilloscope, the exact state of the standard COM port API is not known. All you can do is remember what you have specified and make decisions based on it. All rights reserved. All trademarks and service marks are the properties of their respective owners. Skip to main content. Search form Search. Request new password. Submitted by Rahul.

Sreedharan on 25 December - am. In the previous tutorial , we learned about communicating with the serial port reading and writing using Win 32 API.