Lpc2000

--- In lpc2000@yahoogroups.com, "James Dabbs" <jdabbs@t...> wrote:
> > I have a problem with my lpc2292.
> > The I2C bus does not generate a interrupt after a writing or 
> > a reading. When I set the interrupt manually by setting the 
> > i2c interrupt bit high then it comes in my isr routine.
> 
> I am in the late stages of trudging through an interrupt-driven I2C
> interface for the 2106..  I believe it's the same hardware.
> 
> The I2C system interrupts you only on a 'state change'.  Therefore, you
> have to read/write the data port at the right time to result in an
> interrupt.  In my case, I had to set the STA flag, write bytes, then set
> the STO flag.  I got an interrupt after setting the STA flag and after
> each write.
> 
> I can see how setting the interrupt bit high will force the issue but
> then your status register will probably only give you an 0xf8.
> 
> Good luck.

I set my sta flag. And still I get no interrupt from the i2c. I is
very strange.

I will try writing it directly. Maybe that it helps.