Is speed your problem, cause the spec for IIC is up to 1us per clock
pulse width. Found out that to achieve such speed you need a 20Mhz
crystal at least. The code is really simple will be somthing like
this
wait:
btfss clock  ;poll for clock high
goto wait    ;clock low, wait
movf porta,0 ;clock high, read data
movwf temp   ;store data-1 bit info in 1 byte ram (needs lotsa ram)
wait1:
btfsc clock  ;poll for clock low
goto wait1   ;clock still high, wait
... repeat   ;clock low, poll for clock high again

The code is written for speed, so need lots of rom and ram
cmtan

>>> Thomas Wright <sales@DVDMODS.CO.UK>  31/10/99, 08:32pm >>>
Thanks Quentin
but it still wont work
im am using 12508 pic,pin 5 for data pin 6 for clock..

1-- when i use status,c mplab gives error should this be status,0

what i want to do is to look at an 8 bit data word on pin 5
(standerd i2c
bus )
test to see if it is hi or low then, put the same value into the reg
i named
temp

i used the adapted code you sent but i still cant get the same value
into
temp reg
as i am sending into pin 5 off pic

it looks like my problem is that i am testing for hi,low bit then
moving
temp reg to left (rlf)
this i am doing 8 times the last bit test takes me into carry bit of
temp
reg
(12c508 has 8 bits in reg and carrybit)
so if first bit was logic 1 then and last bit is logic 0 the code
then makes
carry bit 0
so i loose a logic 1 bit,see what i meen??

i have worked this out on paper and i think the 8 bit value left in
temp reg
needs to be reversed
this is fine if first data bit is not logic 1,then i DO get the right
value

i now the code i am sending to pic is fine(i wrote it for a nother
project
and it works fine)

please please help its driving me mad..

thanks