As pointed out earlier, RCTIME is a digital function not analog. So you'll need to enable the port in digital mode. Your code gears the port up in analog mode. BS2 is an unpopular joke in my opinion.
As pointed out earlier, RCTIME is a digital function not analog. So you'll need to enable the port in digital mode. Your code gears the port up in analog mode. BS2 is an unpopular joke in my opinion.
Alright Thankyou for your help i now got it to work. For other newbs who would prefer not make a fool of themselves. The working code is below.
Thanks again. it now results in different things depending on the light. ^^
Code:'---clock settings define OSC 8 OSCCON = %1111110 ' sets internal osc to run at 8MHZ '----------turn analog on porta off, and use as digital input/output CMCON = 7 'Comparators off ANSEL = 0 'A/D off -- Port pins all digital '----------^^^^^^^^^^ '----------the change is in this block of code '---** Constants rcpin var porta.3 '---**variables rcreturn var byte '------**main program loop: '----its rctime! pause 1000 high rcpin pause 5 rctime rcpin,1,rcreturn low rcpin '----(end rctime) shows over folks ^^ '----send serial feedback serout2 porta.0, 16468, ["rc time was: ",dec rcreturn] 'call for data '-----end serial feedback goto loop 'loop forever end
in case you're using a LDR (or high impedance analog source), i see some advantage of RCTime.. unless, i really don't. A simple transistor+few resistor + PIC adc, would be my solution if i need accuracy.
Level detector? ---> PIC Comparator
OR, PIC16F785i've ordered a thousand of them yesterday, sOOOO much nice stuff on-board... built-in OP-AMP, 2 phase PWM + asynchronous feedback as a teaser...
NEW TOY, NEW TOY![]()
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
So you said there was a way of reading a pot in analog? Is there any chance you could give me a little synopsis of how it is done? Thankyou.
Assuming your POT impedance is equal or less than the maximum recommended, you just need to feed the wiper to a PIC analog input and use the internal ADC.
PBP ADCIN is a nice start point.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
This is for a 877 but it will help you get the picture.
http://www.rentron.com/PICX2.htm
Be sure to look at the speacial feature part of the data sheet for the PIC you are usinf as at this point the PIC are not "standard".
There is a RCTIME and place for everythingUpgrading from the BS2, you will enjoy the built in ADC on some PICs. If you have used an external ADC with the BS2, do not try and compare this with the ones built in. End result the same but how tou get there is another story.
Have fun.
Dave
Always wear safety glasses while programming.
- you must be joking. BS2 hovers along at around 2,000 instructions p/sec. BS2 has two major short comings. 1) Overhead of the serial EEPROM which is the reason why it's so slow. 2) Cost - in Australia when BS2 was initially released it retailed for something like $100. I'd swap you a BS2 for a 16f84a any day. In fact, I'd even pay a bit of money on top. Honda Vs Ferrari basically.
And who drives a Ferrari as there first car. The BS2 is a good way to get started. Compare to the cost of PBP or the time of learning assembly and cost of a good programmer...
And about the swap. Your on. What is you mailing address. This would make the Scouting Troop I work with very happy. Do not worry about the "bit of money on top", paying for the shipping will be fine.
Dave
Always wear safety glasses while programming.
Yeah - I guess few people drive Ferraris as their first car, BS2 has its place. As far as the swap goes, I have never personally owned a BS2. I'd be more than happy to adopt some more 16f84's though. One of my old College teachers was mad into BS2. Come to think of it, he was a bit mad himself actually.
Last edited by T.Jackson; - 16th May 2007 at 09:48.
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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Well despite the fact that I have moved on to bigger and better things. The truth is without the BS2 I can pretty much say for sure I would have just given up before I got this far. I feel that for an initial look on microcontrollers it is a good initial investment. but I have moved on. ^^
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