Linux RTS Control

So after a lot of googling and emailing I finally figured out how to control the RTS level (and DTR level) on linux. Through the use of a simple program setSerialSignal I can set RTS and DTR to high or low. Please see instructions and the source code here:

And just the source file here:

This works a charm and allows me to now set the RTS low at boot-up. However, there will still be a minute or so at powerup while the PC goes through system startup and the bootloader where the RTS will be high – as this appears to be done at the hardware/BIOS level. As a result, I will definitely be adding a physical switch to the RTS line so I can switch it off when it's not in use – which would be good practice anyway (but for some reason not included in the various designs).
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s