Lpc2000

> > I was looking for something that would let me do:
> >
> > if(LED1)
> >   LED2 = 1;
> >
> > This would require associating LED1 and LED2 with a particular bit in
> > the appropriate IOPIN register.  Judging from your response, this is
> > not possible with GCC and ARM?
> 

Of course if portability is a concern use bit shifting and masking instead.
Macros make quick work of this.


> If you're ok with bit fields, try this (it works in IAR, should work in
> GCC):
> 
> struct PORT  {
>      unsigned bit0:1;
>      unsigned bit1:1;
>      unsigned bit2:1;
>      unsigned bit3:1;
>      unsigned bit4:1;
>      unsigned bit5:1;
>      unsigned bit6:1;
>      unsigned bit7:1;
>      unsigned bit8:1;
>      unsigned bit9:1;
>      unsigned bit10:1;
>      unsigned bit11:1;
>      unsigned bit12:1;
>      unsigned bit13:1;
>      unsigned bit14:1;
>      unsigned bit15:1;
>      unsigned bit16:1;
>      unsigned bit17:1;
>      unsigned bit18:1;
>      unsigned bit19:1;
>      unsigned bit20:1;
>      unsigned bit21:1;
>      unsigned bit22:1;
>      unsigned bit23:1;
>      unsigned bit24:1;
>      unsigned bit25:1;
>      unsigned bit26:1;
>      unsigned bit27:1;
>      unsigned bit28:1;
>      unsigned bit29:1;
>      unsigned bit30:1;
>      unsigned bit31:1;
> };
> 
> volatile struct PORT *port0_reg = ((volatile struct PORT *)
FIO_BASE_ADDR);
> 
> #define LED1 (port0_reg->bit13)
> #define LED2 (port0_reg->bit12)
> 
> if(LED1)
> 	LED2 = 1;
> 
> 
> Joel