Lpc2000

hi,

  I make the same things with pathfinder and EXTMODE are correct BUT without effect on the behaviour of EINT0 always on low level detection mode .... 

  I note that EXTMODE and EXTPOLAR never chane the behaviour of EINT0 !!! (same code with EINT2 work very fine)

Regards,
Sébastien


  ----- Original Message ----- 
  From: philips_apps 
  To: lpc2000@...m 
  Sent: Thursday, March 31, 2005 11:58 PM
  Subject: [lpc2000] Re: external interrupt edge sensitive don't work



  Bruce,

  I tried debugging the below code using the Keil MicroVision3 
  debugger. 

        /* Configuring EXTMODE and EXTPOLAR    */
        VPBDIV=0x0;
        EXTMODE=0x1;
        VPBDIV=0x1;

        VPBDIV=0x0;
        EXTPOLAR=0x1;
        VPBDIV=0x1;

        VPBDIV=0x0;                        

  It works fine on my end. Please dont single-step through these 
  instructions. You need to place a breakpoint at the instruction 
  following

          VPBDIV=0x0;

  When this breakpoint is hit, on the Memory Window of the debugger, 
  EXTMODE and EXTPOLAR  should reflect 0x1 

  Best Regards,
  Philips_apps

  --- In lpc2000@yahoogroups.com, Bruce Paterson <bruce@t...> wrote:
  > jbhoudry wrote:
  > > 
  > > I have the same problem, impossible to put 1 in EXTPOLAR and 
  EXTMODE 
  > > for EINT0 (no problem for 1 to 3). I program all the 
  recomendations 
  > > from philips :
  > > Before writing to the EXTMODE and EXTPOLAR registers,
  > > 1> Write 0x0 to VPBDIV 
  > > 2> Then write the desired value to EXTMODE or EXTPOLAR register. 
  > > 3> Then write the same value to VPBDIV ( additional step)
  > > 4> Restore the VPBDIV to the previously saved value or simply 
  write 
  > >    to the register again with the desired value.
  > > 
  > > I test on 2 LPC2294 the same, so now i use IT capture 0 timer 1 
  > 
  > Could Philips urgently confirm or not this EINT0 edge problem 
  exists on 
  > a LPC2124 ?
  > 
  > Just about to change a layout to use EINT0 in edge sensitive mode 
  > (wasn't using it at all before) to WAKEup out of sleep mode, so I'm 
  not 
  > in a position to test this till it's all too late !!
  > 
  > -- 
  > Cheers,
  > Bruce
  > -------------------------------------------------------------------
  >      /\\\/\\\/\\\    /   /      Bruce Paterson
  >     /  \\\ \\\ \\\  /   /    Senior Design Engineer
  >    /   /\\\/\\\/\\\/   /   8 Anzed Court, Mulgrave, Vic, 3170
  >   /   /  \\\ \\\ \\\  /  PO Box 4112, Mulgrave, Vic, 3170, Australia
  > /   /    \\\/\\\ \\\/   Ph: +61 3 8561 4232   Fax: +61 3 9560 9055
  >        Tele-IP Ltd.      Email: bruce@t...    Icq: #32015991
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  > -------------------------------------------------------------------





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