hi
i know it's not the right forum but do you guys have any information about Clarions CeNet or C-Bus ?
i've been searching around but haven't found anything not even a pin diagramm
there was also a thread in this forum with clarion in its header but i cannot translate it


thx
mike

hi
it is definitly not CAN, neither the protocol nor the voltage levels
the reason why i used the pic 18F452 is that i had one available and i had to much spare time
btw the 18F452 has no built in CAN hardware
the 82C250 is used to transmit and the OPAMP is the receiving part because the voltage levels on the bus are so low (200mV if i remember right) that the 82C250 does not recognize them
hooking up a PC to the bus is easy just use the adapter as a IP-bus to serial connector
u just need to edit the sourcecode so that it fits your needs

if u are going to build an emulator or just want to fool around with this bus i wouldt recommend you to use an AVR and not a PIC
18F452@40Mhz is ok but every smaller type is to slow to handle the bus and serial com


@Brokly
Inter Equipment bus, mode 1 ?!?
are u joking or it is realy called like that ?

hi vitat

you have talked about a special adapter that is needed to connect more devices to the ipbus
is there any information about it on the pioneer homepage ?
how is that thing  called (what model number)?

thx
mike

hi

atmega seems to work then
you are right this error only comes if an acknowledge error occurs during a send from the emulator to the HU  (or the HU is missing  )

regards
mike

hi

i finaly built a working emulator with a pic
your last post with the timing diagram realy helped vitali

i have one last question
if i want to connect more then one CDC or emulator to the HU i just need to give every device a different ID right ?
if yes, do you have other valid ID's or logfiles of a communication with more devices on the ipbus ?


thx alot
mike

hmm.. i guess your right it must be some timing problem i'll check that tomorrow for now i got to get some sleep

thx & cya
mike

hi vitat

i've built a working logger with a PIC18F452 that captures the communication between my HU(KEH-P6600R)  and the CDC(CDX-P24S) but logging is the only thing that seems to work
when i try to emulate the CDC nothing works

are BUS+ and BUS- the only wires that need to be connected to the emulator or is there anything else that needs to be done to get the bus going ?

your code is rather complex so i can't figure out the first steps after powerup that init the bus
what are the nessecary pieces of code to init the communication between the emulator and the HU ?

sorry for so many questions but it seems as if you where the only avaliable specialist for the IPBUS  

thx
mike

that clears up a few things thx  

i'll post some screenshots of those "spikes" as soon as i have a scope available
i guess a picture could help to explain what i mean

cya and thx
mike