Lpc2000

--- In lpc2000@yahoogroups.com, "Leighton Rowe" <leightonsrowe@y...> 
wrote:
> Are u using IAR? I had to modify the header file I got 
(iolpc2129.h) 
> because apparently the EINT3 channel wasn't defined.
> 
> Well assuming that you're using channel 17 for EINT3... 
> 
> #define VIC_EINT3       17
> 
> ...the code looks ok. 
> 
> 
> Otherwise try clearing the EINT3 flag before enabling the interrupt 
> and let me know what happens.
> 
> Leighton
> 
> 
> 
> --- In lpc2000@yahoogroups.com, "douglasbolton" <doug@c...> wrote:
> > When I set up an external edge sensitive interrupt EINT3 on an 
> > lpc2129 all sorts of problems happen. The jtag stops working and 
> > won't work again until I reprogram through the ISP.
> > 
> > The pin is sitting stable at about 2.8 volts when I run the 
> following 
> > code. If I set up for level sensitive it is ok.
> > 
> > // initialise pin 0.30 (EINT3) to have a negative edge 
> > // triggered interrupt
> > 
> > PINSEL1_bit.P0_30=0x2; 
> > EXTMODE = 0x08;
> > 
> > // enable the interrupt control	
> > VICIntSelect &= ~(1<<VIC_EINT3);  // IRQ on external interrupt
> > VICVectAddr3 = (uint32_t)&ShutdownRamInterrupt;
> > VICVectCntl3 = 0x20 | VIC_EINT3; // vector interrupt for external 
3
> > VICIntEnable = (1<<VIC_EINT3);    // Enable external 3 interrupt.
> > 		
> > Anybody used EINT3 edge sensitive on an lpc2129
> > 
> > thanks Doug



Thanks Leighton but I'd already modified my IAR header file for the 
lpc2129.

Clearing the interrupt before the EXTMODE = 0x08 command did not do 
anything either.

The external interrupt works fine in level sensitive mode, but as 
soon as I write the EXTMODE register with 0x08 to enable level 
sensitive mode on interrupt 3 the processor goes into deep space. 

The EXTMODE register I'm writing is at 0xE01FC148 which agrees with 
the manual.

Something is going very wrong with the processor since I have to 
reprogram the flash with the ISP to get it working again. No matter 
what I do the JTAG is finished.