I remember seeing an APP note on the microchip site a couple of years ago that talk about a project like yours. Do a search there.
Have you done any programming for the palm? If so, (just curious) what developer are you using?
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I remember seeing an APP note on the microchip site a couple of years ago that talk about a project like yours. Do a search there.
Have you done any programming for the palm? If so, (just curious) what developer are you using?
Dave
Always wear safety glasses while programming.
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Hi, the irda signal is not modulated; so, you first need to get rid of the TSOP-IR-Receiver.
Adding irda capability to a PIC could be achieved a number of ways. Microchip themselves have irda codec solutions. Or, look up www.sirpic.com. The guy there, Ravi, specializes in Micro-to-irda solutions in varying degrees of customization. At this site, you'll also find a software-only irda implementation for PICs contributed by another person.
Regards
Anand
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Or modulate the signal. This is what I want to do. Being dependend on light situations has always been the greatest drawback of irda.Originally Posted by ardhuru
Is there a sorce code on his site? I couldn't find any...
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I am using a vb-clone for palm programming.
The only option is to use IrDA.
If I use IrDA,open the connection and send the value 3211 using a baudrate of 38400 and having the TSOP attached to the pic, what should I receive and how do I convert it back to the value via pbp?
Please no links this time. I want to see this problem solved step by step so I can create a code suitable according to this example.
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Ted, here are my views. Consumer IR, which uses modulation, has range, but cannot handle large data flows; that is why irda is not modulated, to enable a relatively higher bandwidth.
You cannot, therefore, modulate and demodulate the raw irda at each end and expect good results (unless you design a complex data buffering system to be stuck in between).
If you must use irda, you will have to accept the raw irda distance limitations.
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There is no need for high bandwidth.
There is a need for emulating the 38khz carrier frequency using IrDA as IrDA is the only way to access the IR Port.
What I found is that using a baudrate of 38400 makes the PIC-Device understand something(I made a LED flash each time the PIC recieves a High-Low and Low-High-change) but I cannot decode it as I don't understand it. It is no real rs-232-code.
You can help me by sharing pseudo-code for my Palm Programme and PBP-Code for the receiving part.
Last edited by Ted's; - 7th June 2008 at 10:36.
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I address this to all readers:
There is no need for high bandwidth.
There is a need for emulating the 38khz carrier frequency using IrDA as IrDA is the only way to access the IR Port.
What I found is that using a baudrate of 38400 makes the PIC-Device understand something(I made a LED flash each time the PIC recieves a High-Low and Low-High-change) but I cannot decode it as I don't understand it. It is no real rs-232-code.
You can help me by sharing pseudo-code for my Palm Programme and PBP-Code for the receiving part.
Last edited by Ted's; - 7th June 2008 at 12:53.
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To the other users: Note that there are some closed source Palm remote control emulators being proof for doability.
There is still a want for a solution.
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Sorry, there must have been an error of some kind.
Many posts of the same message appeared.
Also edited the last message, since it no longer applied.
DT
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I found it. Nice. One drawback is that the tsop is limited to - I guess - 1k bps meaning that the irda requiring 9600bps won't work so I'll have to work with my own codes and low-level. I hope that low - level does not mean assembler though.
Last edited by Ted's; - 5th June 2008 at 00:16.
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