Lpc2000

I use a Olimex LPC2214 board and are having some problems. 
When I run this code (see below) I have a few pins that don't "act
normal". When messuring on a working pin I see a square wave with a
duty cycle of ca. 20% and an amplitude of 3.3 V. When I messure on ex.
P0.2 I have the same duty cycle ratio but the voltage is only 200mV.
The defective pins are: P0.2, P0.3, P0.20, P0.27, P0.28 and P0.29. 

I have used the Timers, RTC and on-chip other perf. with no trouble...

Code:

int main(void)
{
	pll_init();
	GPIO0_IODIR |= 0xffffffff;
	GPIO0_IOSET = 0xffffffff;
	while(1)
	{
		GPIO0_IOSET = 0xffffffff;
		GPIO0_IOCLR = 0xffffffff;
	}
}

Regards Jens Alsig

--- In lpc2000@yahoogroups.com, "jensalsig" <alsig@g...> wrote:
> I use a Olimex LPC2214 board and are having some problems. 
> When I run this code (see below) I have a few pins that don't "act
> normal". When messuring on a working pin I see a square wave with a
> duty cycle of ca. 20% and an amplitude of 3.3 V. When I messure on ex.
> P0.2 I have the same duty cycle ratio but the voltage is only 200mV.
> The defective pins are: P0.2, P0.3, P0.20, P0.27, P0.28 and P0.29. 
> 

use pullup resistor

Hi,

I've tried pullup resistors. This just ties the pin to 3.3 volts

Regards Alsig

knatarov wrote:

> --- In lpc2000@yahoogroups.com, "jensalsig" <alsig@g...> wrote:
> > I use a Olimex LPC2214 board and are having some problems.
> > When I run this code (see below) I have a few pins that don't "act
> > normal". When messuring on a working pin I see a square wave with a
> > duty cycle of ca. 20% and an amplitude of 3.3 V. When I messure on ex.
> > P0.2 I have the same duty cycle ratio but the voltage is only 200mV.
> > The defective pins are: P0.2, P0.3, P0.20, P0.27, P0.28 and P0.29.
> >
>
> use pullup resistor
>
>
>
>
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Hi Alsig,
 For pins 2,3 and 20 check what is attached to them.  Pins 27 ..30 
default to AIN0..3, check if PINSEL1 is set correctly.

Krys

--- In lpc2000@yahoogroups.com, "jensalsig" <alsig@g...> wrote:
> I use a Olimex LPC2214 board and are having some problems. 
> When I run this code (see below) I have a few pins that don't "act
> normal". When messuring on a working pin I see a square wave with a
> duty cycle of ca. 20% and an amplitude of 3.3 V. When I messure on 
ex.
> P0.2 I have the same duty cycle ratio but the voltage is only 200mV.
> The defective pins are: P0.2, P0.3, P0.20, P0.27, P0.28 and P0.29. 
> 
> I have used the Timers, RTC and on-chip other perf. with no 
trouble...

> 
> Code:
> 
> int main(void)
> {
> 	pll_init();
> 	GPIO0_IODIR |= 0xffffffff;
> 	GPIO0_IOSET = 0xffffffff;
> 	while(1)
> 	{
> 		GPIO0_IOSET = 0xffffffff;
> 		GPIO0_IOCLR = 0xffffffff;
> 	}
> }
> 
> Regards Jens Alsig

> > int main(void)
> > {
> > 	pll_init();
> > 	GPIO0_IODIR |= 0xffffffff;
> > 	GPIO0_IOSET = 0xffffffff;
> > 	while(1)
> > 	{
> > 		GPIO0_IOSET = 0xffffffff;

--> here need dealay 

> > 		GPIO0_IOCLR = 0xffffffff;
> > 	}
> > }
> > 
> > Regards Jens Alsig

On LPC2214 P0.2(pin 50), P0.3(pin 58) are open drain outputs when
configured as GPIO.
The rest of the "defective" pins belong to PINSEL1. With the posted
code you configure only the GPIO which belong to PINSEL0.
Read the UserManual.

Regards
Zdravko

--- In lpc2000@yahoogroups.com, "jensalsig" <alsig@g...> wrote:

> I use a Olimex LPC2214 board and are having some problems. 
> When I run this code (see below) I have a few pins that don't "act
> normal". When messuring on a working pin I see a square wave with a
> duty cycle of ca. 20% and an amplitude of 3.3 V. When I messure on ex.
> P0.2 I have the same duty cycle ratio but the voltage is only 200mV.
> The defective pins are: P0.2, P0.3, P0.20, P0.27, P0.28 and P0.29. 
> 
> I have used the Timers, RTC and on-chip other perf. with no trouble...
> 
> Code:
> 
> int main(void)
> {
> 	pll_init();
> 	GPIO0_IODIR |= 0xffffffff;
> 	GPIO0_IOSET = 0xffffffff;
> 	while(1)
> 	{
> 		GPIO0_IOSET = 0xffffffff;
> 		GPIO0_IOCLR = 0xffffffff;
> 	}
> }
> 
> Regards Jens Alsig