Help in Programming

Fardeen · 2004-11-08 21:35

I am currently working on a wireless vital sign monitor. My project includes taking heart, pressure and temperature signals and analysing them.
I accomplish this by taking the signals, filtering and amplifying them, converting them digitally and processing them in a microcontroller before transmitting them wireless and displaying them using Labview.
I am using a microconroller because I am using serial communications for Labview software instead of DAQ (due to budge issues).
My microcontroller code therefore (BS2) requires to take in 3 signals from 3 different ·A/D, decode them to binary, and then send them in an infinite loop in a·format
······················<Tab>Signal1<Tab>Signal2<Tab>Signal3.
I however suck at assembly language and inspite of refering to so many different sources and sites, I am still having a hard time accomplishing this.
Can anybody help me please???

Jon Williams · 2004-11-08 21:39

Do yo want your pogram to run on the BASIC Stamp II? If yes, you will use PBASIC, not assembly.

What A/D convertors are you using? We have lots of example code for differnt converters.

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Jon Williams
Applications Engineer, Parallax
Dallas Office

Fardeen · 2004-11-09 17:22

I am using 8 bit A/D ( ADC08832)
I will appreciate any examples and help I can get.
Thanks alot.

Jon Williams · 2004-11-10 14:23

I don't have an ADC0832, but I did write the attached code for someone who does -- they said it worked for them.· As always, I suggest that you review the ADC0832 docs before running the code ... I'm human.

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Jon Williams
Applications Engineer, Parallax
Dallas Office

Fardeen · 2004-11-12 19:55

Hey Jon

I have written the code for my project. I just want someone to look over it.

My program is supposed to take 3 input signals from 8 bits A/D (AD08831) and process them·so as to output serially in the format

····································· <Tab>Signal1<Sab>Signal2<Cab>Signal3

so that I can separate them on receivind end (Labview).

Also, is there a way I could just take a signle input from A/D into my chip and serially display the outut on the basic stamp editor??

I noticed the connections between the [url=mailto:BS@-IC]BS2-IC[/url]·and RS232 on the BS2 manual and just wanted to doublecheck before doing that so as not to blow up anything.

Thanks

Fardeen · 2004-11-12 19:59

Sorry. I forgot to attach the file in the first message.

Jon Williams · 2004-11-12 20:09

<Tab> has an ASCII value of 9, and is a defined constant in PBASIC.

You should be able to do this: SEROUT pin, baud, [noparse][[/noparse]TAB, sensorValue]

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Jon Williams
Applications Engineer, Parallax
Dallas Office

Fardeen · 2004-11-12 20:32

Thanks for the response Jon.

Can I just use a single line command as

SEROUT pin, baud, 50, timeout, [noparse][[/noparse]TAB, sig1, CR, sig2, TAB, sig3]

where timeout is a label

Also, would the constants TAB, CR, and·TAB each be sent as 8 bits serially or?????

I would be very thankful if you can overlook my code please.

Thanks again

Jon Williams · 2004-11-12 20:52

Yes, you can do that; but note that there is no timeout parameter for SEROUT -- what you send gets sent. If you need to make sure that the receiver is ready then you'll have to use flow control. Our RS-232 AppMod shows how to do this (you'll also need a pin for the flow control input).

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Jon Williams
Applications Engineer, Parallax
Dallas Office

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