Using DTR/RTS lines in Serial

[Jim_Marquardt]

Hello All,
Just starting out with XOJO and I am trying to understand the Serial controller interface regarding the DTR/RTS lines. I need to pulse these lines using radio buttons, which I thought would be easy enough with an event>action that triggers a timer that will pulse the line(s), but in the help file I read this:

Changing property values does not automatically change the state of the hardware, you must call Reset or re-Open the connection in order for the change to take effect

I read this as in order for me to activate/deactivate the line(s) I have to reset the connection twice. I hope I am wrong on this as the way I read the quote would be a rather time consuming operation.

Any tops on how to pulse these two lines?

Thanks
JIm

[anon20074439]

Set both settings then call one reset to enact the change?

[Ulrich_Bogun]

See the docs:

Changes to the serial device are queued so that you can modify multiple properties of it without them all taking effect immediately. For instance, you can set the baud, parity and stop bits as one operation instead of three. The same thing applies to the line state properties. Once you’ve made all your changes, you need to call .Reset on the serial device to reset the device to the new settings.

[Jim_Marquardt]

Set both settings then call one reset to enact the change?

No good. Each line controls a separate item. THey are not simultaneous action items.

The same thing applies to the line state properties. Once you’ve made all your changes, you need to call .Reset on the serial device to reset the device to the new settings.

Then that is a bug in XOJO as thats not how those lines operate in actual serial comms. Closing and reopening the connection will cause the loss of one or two bytes.

[Tim_Hare]

Reset does not close the port, it merely sets the state of the lines. If they are operating independently, put a reset in each button.

[Jim_Marquardt]

I’ll try it and see what happens. THank you