I'm trying to build a serial communication (RS232, TX and RX only) between a uC and a PC. The uC card is measuring low level of currents and thus very prone to EMC problem. At the moment there is an ADC converter on the uC card and I have achieved a resolution of 15 bits. No wonder that if I connect the serial port directly to the card my resolution will be down by a couple of bits due to the noise injected by the PC. Thus what I would like to do is to isolate the PC and the uC using optocouplers. I'd like to use the voltage available in a serial port to drive my optocoupler. For this I need to permanently assert one pin low and one pin high of the serial port and connect the optocoupler with the proper resistors. I'm using an old (ca 2000) LabVIEW 6i and I wonder if it possible with this version to assert pins individually, like CTS/RTS for instance. Can you help me with this ?
On 20 oct, 17:10, chilly charly <x...@no.email> wrote:
> You need to use a property node, as in the attached example
> <img src="http://forums.ni.com/attachments/ni/170/279343/1/Assert%20RTS..png"> Message Edité par chilly charly le 10-20-2007 04:56 PM
>
> Assert RTS.png:http://forums.ni.com/attachments/ni/170/279343/1/AssertRTS..png
>
> Assert RTS-DTR.vi:http://forums.ni.com/attachments/ni/170/279343/3/AssertRTS-DTR.vi
