Lpc2000

Hallo,
Thanks for your effort

It’s a pity, but it doesn’t work…
I watched the pins 26 and 27 -> they didn’t toggle.  
Then I changed the code as I need (0xC00000C to 0xC000000C) and pin 30
and 31 didn’t toggle too. 

Regards Sören



PS: these two tings are defined in my LPC2100_addr.h. It's a comfortable
way, to access Registers.
// helper macro to write to a memory mapped register
#define REG(addr) (*(volatile unsigned long *)(addr))

#define PCB_PINSEL0        (0xE002C000) /* pin function sel reg 0 */
#define PCB_PINSEL1        (0xE002C004) /* pin function sel reg 1 */

So I can use it like this: REG(PCB_PINSEL1) &= ~(0xF0000000);
 



>>Hi,
>>
>>I have a similar problem. I want to use p0.2 and p0.3 as standard GPIO
>>Output Pins.
>>For this use I need a Pull up resistor.
>
>Yes, that's to be expected.  They are the IIC pins and need pullups.
>
>
>>If I use another Pin like P0.30 the level not changes on wire, not
with
>>pull up not with pull down and not without anything.
>>What can be wrong?
>>
>>Here is my code: I think it's not the Problem, I hope
>>
>>     REG(PCB_PINSEL1) &= ~(0xF0000000);
>
>First, what is REG defined as?  And also PCB_PINSEL etc...  That's an 
>unusual looking construct.
>
>>     REG(PCB_PINSEL0) &= ~(0xF0);
>>     REG(GPIO_IODIR) |= 0xC00000C; //Output direction for P0.30/31/2/3
>>     REG(GPIO_IOCLR) |= 0xC00000C; //Set Port P0.30/31/2/3 low
>>//P0.2/3 OK with Pull-up
>>     REG(GPIO_IOSET) |= 0xC00000C; //Set Port P0.30/31/2/3 high


>I don't believe These lines do what you think they do.  You want
something 
>more like.
>
>IOCLR = 0xC00000C;
>IOSET = 0xC00000C;
>
>And 0xC00000C should be 0xC000000C;
>
>You're off by a couple of pins.
>
>IOCLR |= 0xC00000C;
>
>will clear (at least) pins 2, 3, 26, 27.  IOCLR is a write only
register.
>
>IOSET |= 0xC00000C;
>
>will set pins 2, 3, 26, 27 AND any other pins that had previously been
set 
>(a little redundant but not harmful).
>
>>//P0.2/3 OK with Pull-up
>>     b_sleep(0xffff);
>>     REG(GPIO_IOCLR) |= 0xC00000C; //Set Port P0.30/31/2/3 low
>>//P0.2/3 OK with Pull-up
>
>Check pins 26 & 27 and see if they are toggling.
>
>
>" 'Freedom' has no meaning of itself.  There are always restrictions,
>be they legal, genetic, or physical.  If you don't believe me, try to
>chew a radio signal. "
>
>                         Kelvin Throop, III