Peak detector

[Dennis_Knutson]

Then your sensor does not detect rate. Rate would be something that you have to calculate in your program.

So, since you only have one signal, the example should work though you can delete the write section. What about answering the rest of the questions. And have you tried reading the serial data in another program such as Hyperterminal, Procomm, Putty?

[Bildavid]

mmmmmmmmmmm okayyy now i get it . i just need to delete the write function coz it just writes bytes to the device and that;s not my case . ok 

sampling rate should be fat enough in order to obtaing  the fast ECG signal. so i guess that it should be 1000,

any suggestions /?

[Bildavid]

one thing also . the microcontroller sends a byte which starts with a start bit. the transfer of the block ends when a stop bit is detected last.

[Dennis_Knutson]

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@shangal wrote:

one thing also . the microcontroller sends a byte which starts with a start bit. the transfer of the block ends when a stop bit is detected last.

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That just sounds like normal serial protocol which you select with the VISA Configure Serial Port.

So, run the VI and post back if you get any errors. I will also repeat my suggestion that you try another serial program. If you can read with that, you can read with LabVIEW.

[Bildavid]

DEAR Dennis_Knutson

thank you very much , u were a great help. i'll do the things you told me to and i will try tomorrow, and let you updated.

Sincerely

[husssey]

to acquire that signal in labview you need to purchase a usb daq card to acquire signal in labview graph.

thanks