Lpc2000

Hello group,

  Have a strange problem. The following code works perfectly on a LPC2106.

    if (((T1IR & T1IR_MR2INT) != 0) || (T1MR2 < T1TC)) // Timer 1,
Match 2 - 500ms LED Delay <<<<<<<<<<<<<<<<<<<<<<
       {
        T1MR2 = T1TC + DEFAULT_TMR1_MR2_TIMEBASE; // Count up to this
value. Generate 2 Hz interrupt.
                    if ((IOPIN & POWER_LED) == 0)
                       {
                        IOSET = POWER_LED;
                       }
                    else
                       {
                        IOCLR = POWER_LED;
                       }
       }

=================================================
 I then used the same software on a LPC2138 and it only runs once and
then never again.

    if (((T1IR & T1IR_MR2INT) != 0) || (T1MR2 < T1TC)) // Timer 1,
Match 2 - 500ms LED Delay <<<<<<<<<<<<<<<<<<<<<<
       {
        T1MR2 = T1TC + DEFAULT_TMR1_MR2_TIMEBASE; // Count up to this
value. Generate 2 Hz interrupt.
                    if ((IO0PIN & POWER_LED) == 0)
                       {
                        IO0SET = POWER_LED;
                       }
                    else
                       {
                        IO0CLR = POWER_LED;
                       }
       }
========================================================
  I then changed the routine to the following and found it worked
perfectly on the LPC2138.

    if (((T1IR & T1IR_MR2INT) != 0) || (T1MR2 < T1TC)) // Timer 1,
Match 2 - 500ms LED Delay <<<<<<<<<<<<<<<<<<<<<<
       {
        T1MR2 = T1TC + DEFAULT_TMR1_MR2_TIMEBASE; // Count up to this
value. Generate 2 Hz interrupt.
                    if (led_50 == TRUE)
                       {
                        IO0SET = POWER_LED;
                        led_50 = FALSE;
                       }
                    else
                       {
                        IO0CLR = POWER_LED;
                        led_50 = TRUE;
                       }
       }

  It almost looks like that the IO0PIN can not be read in an interrupt
for the 2183 but it is ok on the 2106. Anyone else seen this behavior
before??

PS I checked the assembly code and all looked perfect!

regards,
Charles