I have a 12-bit A/D comvertor ADS7817. It has serial synchronous 3-wire output. How can I read it directly, without microcontroller, by using LV5.1 software only? May be it is possible to do it by using LPT port as a digital input?

Stas · ‎04-06-2001

ADS7817 serial interface has DCLOC and CS/SHDN as input and Dout as output. Can I generate these signals by LV, send it via LPT to ADS and read 12 bit from LPT? I need a sampling frequency at least 2 KHz. Will it work? I am not sure if LPT can write and read the data simultaneously. At least, if I simulate the DCLOC and CS/SHDN by additional IC generator, how to read by LPT at all?
Alternative way: If somebody have a VI (or CIN) to read 12 bit via COM port?

Best regards,
Stas

Doug C · ‎04-09-2001

Hello Stas,

Once again I have to point out your best option; DAQ Cards from NI will not make you jump through these hoops.
LabVIEW can talk to the LPT port, but you can send strings or commands specific to the instrument that you have. LabVIEW does not have the ablity to convert serial to parallel or anything like that. Anything that the instrument can output as long as it was in the correct format LabVIEW can read. The specific VIs to use are the port in and port out in LabVIEW 6.

Doug

LabVIEW

I have a 12-bit A/D comvertor ADS7817. It has serial synchronous 3-wire output. How can I read it directly, without microcontroller, by using LV5.1 software only? May be it is possible to do it by using LPT port as a digital input?

I have a 12-bit A/D comvertor ADS7817. It has serial synchronous 3-wire output. How can I read it directly, without microcontroller, by using LV5.1 software only? May be it is possible to do it by using LPT port as a digital input?

Re: I have a 12-bit A/D comvertor ADS7817. It has serial synchronous 3-wire output. How can I read it directly, without microcontroller, by using LV5.1 software only? May be it is possible to do it by using LPT port as a digital input?