Help with Manchester Encoding

[jhorsburgh]

Thanks Skimask, i made the changes to the code and it compiled with no errors.

I managed to download the HEX files to both the transmitter and reciever chips and installed them back into the circuit. I connected it to the computer and started HyperTerminal. When i powered the circuit up, Hyperterminal displayed "uB=" three times and then no more information was displayed.

I am still new to this so i am not sure whether i have stuffed up the circuit or the code. I have attached a copy of the circuit design, can anyone's see anything wrong with it or programmed it incorrectly?

Thanks again,
Jeremy

[skimask]

I managed to download the HEX files to both the transmitter and reciever chips and installed them back into the circuit. I connected it to the computer and started HyperTerminal. When i powered the circuit up, Hyperterminal displayed "uB=" three times and then no more information was displayed.

Re-Read your PBP manual SLEEP section VERY VERY carefully.
Then compare that chapter to your code and you will have your answer.

I believe that the thread referenced in post #1 is flawed in one particular aspect (it also contain the phrase 'this example has not been tested'), and it is this aspect in which yours is also flawed...

[jhorsburgh]

Thanks Skimask, i had to read over the SLEEP definition a couple of times but i got it in the end. The code worked fine when there is a wire between the PIC's but when i use the RF Modules the first signal goes through to the computer but after that only 30% make it.

I looked around and found that almost all similar project use an external oscillator, so i changed it to external and added leds to both circuits so i know when a signal is sent and recieved. That didn't really do much more than tell me that the reciever wasn't getting the signal.

Would a preamble be needed to make this more reliable. If so how would i go about doing that?
Thanks,
Jeremy

[Ioannis]

Are your modules capable of sending serial data? If not, then manchester encoding - decoding is a must. Also preamble always needed.

This case has been brought up many times, just have a look around.

Ioannis

[jhorsburgh]

Thank you all for your help.
I have moved back to SEROUT/SERIN to keep things simple. The RF seems to be working great, now i just have to get the IR working.

Thanks Again,
Jeremy

[Ioannis]

Serin/Serout has nothing to do with the modules ability to send raw binary or encoded data for Data slicer balancing. Be carefull with that.

Ioannis