Lpc2000

I don't if this will help you much as I've no idea what uC you are 
using but I'm currently in the process of developing an I2C interface 
myself.  I have the SI interrupt working correctly.  The set up code 
for the interrupt is straight forward and looks something like this:

VICVectAddr4 = (unsigned long) i2c_si_isr;   //set intrpt vector addr
VICVectCntl4 = 0x20 | 9;   //use VICVectAddr4 as SI intrpt
VICIntEnable = 1 << 9;   //enable SI intrpt

The ISR looks something like this:

void i2c_si_isr(void) __irq  {
   unsigned long intrptSwap;
	
   tempIntrpts = VICIntEnable;   // save enabled intrpts
   VICIntEnClr = 0xffffffff;   // disable all intrpts

   // your ISR code here.

   VICIntEnable = intrptSwap;   // restore intrpts
   VICVectAddr = 0;   // acknowledge interrupt (must have this)
}//end i2c_si_isr()


I'm using the lpc2129 and Keil Arm Tools and am new to both so sorry 
if this is of no help.



--- In lpc2000@yahoogroups.com, "Ken" <anotheruglygeek@y...> wrote:
> I am having problems getting the I2C interrupt to work.  I have 
setup 
> the VIC to enable the I2C interrupt (channel 9) in exactly the same 
> way I have setup all the other interrupts (which work).
> 
> I can see that the SI bit is getting set correctly - and I can use 
> the I2C interface by polling this - but the ISR is not executing.  
> 
> Does the I2C interrupt have to be enabled anywhere else or is 
setting 
> up the VIC enough?  The UART requires an enable bit to be set also 
> but I cannot find an equivalent for I2C.
> 
> The samples in the files section seem to also use polling.  Any 
help 
> appreciated.
> 
> Thanks!