how to build a CMOS/TTL to RS232 convertor with Labview7.0

[chang qiang]

my GPS receiver provider a serial CMOS/TTL commnication port and I have a PCI-6014 DAQ card. How to program UART in abview7.0 to convert CMOS/TTL siganal to RS232 protocol signal by using PCI-6014 DAQ.
Thanks

[DOC-doc]

Why can't you plug your GPS on the RS232 port and read il with LabVIEW ?

[Henrik_Volkers]

To use the RS232 Port he might need a circuit to shift (and mostly invert) the TTL level to RS232 levels.
traditional solution is a maxim IC that does the job.
shematics can be googled 'TTL RS232'
Even if he buy a ready device that will be cheaper than the DIO solution 😉

[Swapnil]

Yes, probably it will be a good idea to convert the data from the TTL port of your GPS receiver to RS 232 signal (pass the signal through a RS 232 driver). You can then use LabVIEW to read it directly.
What are you using PCI-6014 exactly for?
Good luck !

[chang qiang]

A simple way is to use a chip hardware convertor. But it is possible to program a UART protocol driver with labview. I'm very appreciated if someone can provide the driver code or some advice for the driver programming.

[chang qiang]

I just use PCI-6014 for GPS CMOS/TTL signal acquisition

[chang qiang]

Can you explain your ideal in details.
GPS send serial singals with CMOS/TTL level which can not be accepted by RS232. So I want to read it through DIO of PCI-6014 and process these signal using labview.
I need extract real data from these signals.
In this project, we need this software driver instead of hardware convertor from TTL to RS232 (such as DS275 or MAXIM MAX232 chip)