looking for h/w i2c master example

[Mark DSylva]

Hi,
I'm looking for an example which uses the h/w I2C in master mode. I wrote some code and expected to see some activity on the SCLK and SDATA lines but the they are always high.

Mark
___________________________
This message was ported from CCS's old forum
Original Post ID: 10519

[PCM programmer]

:=Hi,
:=I'm looking for an example which uses the h/w I2C in master mode. I wrote some code and expected to see some activity on the SCLK and SDATA lines but the they are always high.
-----------------------------------------------

1. What version of the compiler do you have ?

2. What PIC do you have ?

Those are the first two things to check when H/W i2c doesn't
work.

Here is a previous post, regarding the compiler version issue:
<a href="http://www.pic-c.com/forum/general/posts/10231.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/10231.html</a>

Here is a post, regarding the type of PIC that you're using:
<a href="http://www.pic-c.com/forum/general/posts/8499.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/8499.html</a>

Assuming that your version of the compiler supports it,
here is a test program. You will have to un-comment
the line that enables H/W i2c, and comment out the line
for software i2c.
<a href="http://www.pic-c.com/forum/general/posts/8281.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/8281.html</a>

If your version of the compiler doesn't support H/W i2c
then this program can be used:
<a href="http://www.pic-c.com/forum/old/messages/725.html" TARGET="_blank">http://www.pic-c.com/forum/old/messages/725.html</a>
___________________________
This message was ported from CCS's old forum
Original Post ID: 10521

[Mark DSylva]

:=:=Hi,
:=:=I'm looking for an example which uses the h/w I2C in master mode. I wrote some code and expected to see some activity on the SCLK and SDATA lines but the they are always high.
:=-----------------------------------------------
:=
:=1. What version of the compiler do you have ?
:=

The version is quite recent : 3.130


:=2. What PIC do you have ?

I am using a PIC 18F452 and an ICE2000 emulator.

I'm going to try your suggestion and report back if I have success or not.

Thanks

Mark


:=
:=Those are the first two things to check when H/W i2c doesn't
:=work.
:=
:=Here is a previous post, regarding the compiler version issue:
:= <a href="http://www.pic-c.com/forum/general/posts/10231.html" TARGET="_blank"> <a href="http://www.pic-c.com/forum/general/posts/10231.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/10231.html</a></a>
:=
:=Here is a post, regarding the type of PIC that you're using:
:= <a href="http://www.pic-c.com/forum/general/posts/8499.html" TARGET="_blank"> <a href="http://www.pic-c.com/forum/general/posts/8499.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/8499.html</a></a>
:=
:=Assuming that your version of the compiler supports it,
:=here is a test program. You will have to un-comment
:=the line that enables H/W i2c, and comment out the line
:=for software i2c.
:= <a href="http://www.pic-c.com/forum/general/posts/8281.html" TARGET="_blank"> <a href="http://www.pic-c.com/forum/general/posts/8281.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/8281.html</a></a>
:=
:=If your version of the compiler doesn't support H/W i2c
:=then this program can be used:
:= <a href="http://www.pic-c.com/forum/old/messages/725.html" TARGET="_blank"> <a href="http://www.pic-c.com/forum/old/messages/725.html" TARGET="_blank">http://www.pic-c.com/forum/old/messages/725.html</a></a>
___________________________
This message was ported from CCS's old forum
Original Post ID: 10527