Hi,
My hardware is NI sbRIO9607. I want to use the RS232 serial interface provided by Labview Clip Generator and I have also done all the necessary assignments written. But I could not find any way to pull-down the created port pins, which they are always pulled-up, except Serial Console Port ASRL1::INSTR, which is pulled down as default. All serial port bits are converted to its bitwise inverse, excluding bits of ASRL1::INSTR. I can invert all the signal bits, but could not pull-down the line while it is idle.
I put screenshots below. The yellow signal might be considered as the actual working TxD signal, which is obtained by using ASRL1::INSTR. And the green signal is the ASRL2::INSTR port TxD signal. If the line is not pulled-down, DCE could not see the signal.
I have tried to select pull-down option of the DIO pins from the Clip Generator, but it did not help, since I think VISA function internally assigns HIGH value to the pin while it is idle. The only way I can see is to write my own Serial functions since I have to solve this problem by just using software.
How could I pull-down this Clip Generator ports while they are idle in labview, is there any way to do this?
Thank you very much,
Best Regards,
Onur YILDIZ