Now I am approaching a different task.
I connected a TSOP-IR-Receiver to my device being run by a 16f628a. I want to control it via palmos 3.5 irda or own codes.
Question: Who has already accomplished that task and can give me reliable sources?
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Now I am approaching a different task.
I connected a TSOP-IR-Receiver to my device being run by a 16f628a. I want to control it via palmos 3.5 irda or own codes.
Question: Who has already accomplished that task and can give me reliable sources?
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?
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
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.Quote:
Originally Posted by mackrackit
Or modulate the signal. This is what I want to do. Being dependend on light situations has always been the greatest drawback of irda.Quote:
Originally Posted by ardhuru
Is there a sorce code on his site? I couldn't find any...
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.
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.
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.
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.
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.
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.
Thanks, Darrel.
I have no idea why my message got posted repeatedly.
I'm sorry for the inconvenience caused.
Regards,
Anand
I accept your excuse.
Darrel, do you have a recommendation on how to proceed regarding the main issue?
I proceeded in the past. I succeeded in creating the signal, but decoding using pbp is a challenge.
The code is rc5.
Here is the pbpcode. Receiver means TSOP1740, 1 = No signal, 0 = Signal:
Content and DeviceNr are always 0xFF. Why is this so?Code:Palm:
WHILE Receiver = 1
WEND
WHILE Receiver = 0
WEND
WHILE Receiver = 1
WEND
ByteNumber = 5
WHILE ByteNumber > 0
--------Time = 0
--------WHILE Receiver = 0
----------------Time = Time + 1
----------------Pauseus 10
--------WEND
--------IF Time > 140 THEN
----------------DeviceNr.0[ByteNumber-1] = 0
--------ELSE
----------------DeviceNr.0[ByteNumber-1] = 1
--------ENDIF
--------ByteNumber = ByteNumber - 1
--------Time = 0
--------WHILE Receiver = 1
----------------Time = Time + 1
----------------Pauseus 10
--------WEND
--------IF Time > 140 THEN
----------------DeviceNr.0[ByteNumber-1] = 1
--------ELSE
----------------DeviceNr.0[ByteNumber-1] = 0
--------ENDIF
--------ByteNumber = ByteNumber - 1
WEND
ByteNumber = 6
WHILE ByteNumber > 0
--------IF Receiver = 1 THEN
----------------Time = 0
----------------WHILE Receiver = 1
------------------------Time = Time + 1
------------------------Pauseus 10
------------------------If Time = 254 THEN
--------------------------------ByteNumber = 0
------------------------ENDIF
----------------WEND
----------------IF Time > 140 THEN
------------------------Content.0[ByteNumber-1] = 0
----------------ELSE
------------------------Content.0[ByteNumber-1] = 1
----------------ENDIF
----------------ByteNumber = ByteNumber - 1
--------ELSE
----------------Time = 0
----------------WHILE Receiver = 0
------------------------Time = Time + 1
------------------------Pauseus 10
----------------WEND
----------------IF Time > 140 THEN
------------------------Content.0[ByteNumber-1] = 1
----------------ELSE
------------------------Content.0[ByteNumber-1] = 0
----------------ENDIF
----------------ByteNumber = ByteNumber - 1
--------ENDIF
WEND
Goto Palm
If you have questions, ASK!
Thank you.
To be continued here: http://www.picbasic.co.uk/forum/show...8443#post58443