On Mon, Oct 20, 2008 at 5:47 PM, Dennis Muhlestein <djmuhlestein@gmail.com> wrote:
I've been playing around with reading and writing i2c data on my fx2lp
board.  Here is the 1st three steps for reading i2c data according to
the TRM (13.4.4)

1. Set START=1. If BERR = 1, start timer*.
2. Write the 7-bit peripheral address and the direction bit (1 for a
read) to I2DAT.
3. Wait for DONE=1 or for timer to expire*. If BERR=1, go to step 1.

I understand you can get a BERR if another controller on the board is
trying to send data on the bus.  I'm not quite clear on what do do in
this case.

Should I

a) set a timer, wait for the timer to go off, and then start over at
step 1 or
b) set the timer, write the address to I2DAT, and then wait for the
timer then check DONE and BERR both.

Thanks for helping noobs!
Dennis

If I recall correctly, you should use option a. set a timer and then start over at step 1.

--
Ori Idan