Manchester Coding / Decodeing for RF Modules

[kireytir]

Encode:
For d = 0 to 3 ' 4 bit
if v.0[d]=0 Then
encoded.0[d*2]=0
encoded.0[d*2+1]=1
else
encoded.0[d*2]=1
encoded.0[d*2+1]=0
endif
next
serout2 portb.0,396,[%1000,encoded]
goto basla
'd: number of bits to encode (8 bits)
'v: byte to BE encoded
'encoded: WORD sized variable holding the encoded
'byte v.


im using this manchester encoding but i didnt decode this pls help..

[Ioannis]

Here are the two subroutines to encode and decode the bi-phase or manchester scheme.

It works for sure.

Ioannis

[Skyjumper]

Even after years still usefull... I was reading this topic, cause I am searching for a true solution. In this topic I miss the 90 degrees phase shifting, I think only bytesize is doubled here. I read somewhere else that Manchester code is a bi-phase code with not only transitions on the beginning of a bit, but at the center of a bit as well. It is defined as a transition orientated code, not a bit orientated. But maybe I am wrong here, cause I am quite new to this, so can anyone explain me please ?