• INT0(P1.3) LPC935 in simulation not working while INT1(P1.4) works fine
    Hi all, I am having a problem with the simulation of my project which uses both external Interrupts, Interrupt 0 and Interrupt 2. I enable all the signals necessary to enable the Interrupts. When in...
  • Input to "disabled" INT1 halts execution
    87C51RA+ Trying to use P3.3/INT1 as an input. I set EX1 = 0; at the beginning of main(), which should disable INT1. EX1 is not referenced again, and remains =0. Whenever I pull the P3.3/INT1 pin...
  • INT0 used as triggering
    Dear collegues, I'm trying to use the INT0 interrupt as trigger system. Basically I have in input a square wave having the low level of 8 msecs and I would like to have on the output a square wave...
  • Require Interrupt function for INT0
    Hi, Can anybody give me a small code which can demonstrate to me the way to write interrupt functions. I have tried but it din't worked.The code is below - #include<AT89x52.h> #include<stdio...
  • Configuration of P1 versus INT0 !
    I want to use the external interupt pin 0. So I configured the Port 1 like this : // 3 IRQ : Input Only. P1M1 = 0X7E; P1M2 = 0x81; But when debugging, the checkboxes in P1 window are greied for...