How to use RS232 to get data from PIC

[LabLeo]

HI

Thanks for the files.

Attached you will find what I did so far. Now the communication between the pic and Labview works.

The only problem I do have now is that the gauges tend to jitter.

I wonder If I made a huge mistake in the programm or that Labview is just not fast enough for that.

I do get a new inputstring every 100ms. When I change the constant of the waittimer it becomes better. But I think that is not the right way to get acceptable values.

Bye

[nutmegzzzz]

I am unable to look at your code, I am still working with LV 7.0 and I think you sent 7.1.

I take it you are making an analog measurement with your PIC.  I have that problem too as in my program I am using 10 bits to take in a 5V reference.  Check and see if you are using 8 bits or 10 bits, the code would be

#define ADC = 10

if you don't see this line, you are using the default and it is probably 8 bits.  But still that would be 19.5 mV separation at the PIC input.  I am using a cheap potentiometer as well as 10 bits so I expect some jitter with 5mV separation.

As for speed, I had my baud rate up to 38400, continuously taking in data and never had any problems (generally I operate at 9600). 

My guess is the jitter is coming from the PIC, I haven't done a lot of programming in LV or PIC's but I hope to do more in the future. 

[nizartunisia]

Hi,

wiring diagram please

Thx

[smercurio_fc]

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@nizartun wrote:

Hi,

wiring diagram please

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To whom is your question addressed? And to what are you referring by "wiring diagram"? If you are referring to the block diagram, the VI was posted - just download it and look at it.

[nizartunisia]

I want to say electronic circuit diagram