Lpc2000

Aye... just to add P0.26 is listed as a reserved pin in the manual. The
other two are open collector from I2C as already explained by Robert. So
your code appears to be working just fine :)

Andy

-----Original Message-----
From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com]On Behalf
Of John Stamos
Sent: 22 May 2006 13:52
To: lpc2000@yahoogroups.com
Subject: Re: [lpc2000] Broken IO Pins?


Can someone recommend a good resistor value to use for the pullup resistor?

  Much Thanks.

Robert Adsett <subscriptions@...> wrote:        At 06:36
PM 5/20/06 +0000, jstamos111 wrote:
  >Hey guys,
  >
  >This problem has me completely baffled.  Hopefully you can help.
  >
  >I have an LPC2106 running on a board of my own design and am using
  >Keil tools to compile the code.  Here's my very short code:
  >
  >void main() {
  >PINSEL0 &= 0x00000000;
  >IODIR0 = 0xFFFFFFFF;
  >IOSET0 = 0xFFFFFFFF;
  >while(1);
  >}
  >
  >The problems when I run this code all IO ports turn on except P0.2,
  >P0.3 and P0.26.  Any idea why?  I tried looking in the documentation
  >but couldn't find anything specific about these ports not working for
  >IO.  I thought maybe the problem was what I had the pins connected to
  >(a CPLD) so I made sure to put the connected CPLD pins as inputs and
  >even disconnected one pin completely and still the same problem.  I
  >have multiple boards and it does it for at least two of them.

  Well P0.2 & P0.3 are open collector so they'll need pull-ups.  See
  http://www.open-research.org.uk/ARMuC/LPC2100Tips.html

  P0.26 I don't see anything off hand unless you have JTAG enabled.

  Robert

  " '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
  http://www.aeolusdevelopment.com/



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