Hello Ken,
these usb to serial connections are are little weird. when you plug it in the linux side sees the serial USB port, even if there's nothing on the other end yet.
On the arduino side, if it is rs232, you could just set all handshake signals low. I don't think you can "influence" the USB connection, from the serial side.
The only thing you could do is make the computer side wait, until the arduino raises a DTR signal or so.
|||| |||| ||Ron || On 12/1/20 7:20 PM, ken.stra...@gmail.com wrote:
I'm looking for a USB <-> Serial chip (something similar to the FT232R or CH340) that has an enable pin so it can be plugged into the computer's USB port but not initiate the connection process until the enable pin is activated. One possibility is to power up the widget, wait and then boot Linux but this is prone to operator error. Or perhaps someone can suggest an alternate approach. To explain: I am building an Arduino controlled widget that requires a lengthy initialization delay to home the axis and other tasks before it is ready to "talk" to Linux. I want to leave it plugged into the computer's USB port but unfortunately Linux boots before it completes initialization. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
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