topic LPC1114 interrupt issue in LPC Microcontrollers

LPC1114 interrupt issue

keny — Fri, 24 Mar 2017 17:26:37 GMT

I made a simple code to test the interrupt on LPC1114 but it doesn't enter the routine.

the code:

#include "LPC11xx.h"

volatile int count=0;

void TIMER_32_0_IRQHandler(void) {
   LPC_TMR32B0->IR = 1; //reset flag
   count++;
   if (count == 44000) {
      count = 0;
   LPC_GPIO1->DATA ^= (1<<6);
   }
}

int main(void) {
   LPC_SYSCON->SYSAHBCLKCTRL |= (1<<9);//enable clock on TC32B0
   LPC_TMR32B0->MCR = 3; //enable interrupt + interrupt when TC = MR0
   LPC_TMR32B0->MR0 = 1091; //match register
   LPC_TMR32B0->IR = 1; //interrupt on MR0
   NVIC_EnableIRQ(TIMER_32_0_IRQn);//enable interrupt
   LPC_TMR32B0->TCR = 1; //enable timer
   LPC_GPIO1->DIR |= (1<<6);
   while(1) {
   }
}

I don't understand where i am wrong.

Re: LPC1114 interrupt issue

keny — Fri, 24 Mar 2017 20:42:59 GMT

I try

void TIMER32_0_IRQHandler(void) {

but it doesn't work too

Re: LPC1114 interrupt issue

jeremyzhou — Tue, 28 Mar 2017 02:39:29 GMT

Hi keny keny ,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.

I'd highly recommend you to refer to these periph_blinky demo which are involved in the LPCOpen library.

LPCOpen library:

www.nxp.com/assets/downloads/data/en/software/lpcopen_v2_00a_keil_iar_nxp_lpcxpresso_11c24.zip

Have a great day,

Ping

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Re: LPC1114 interrupt issue

Badman — Wed, 29 Mar 2017 18:12:36 GMT

Check this code:

#include "LPC11xx.h"

volatile int count=0;

void TIMER32_0_IRQHandler(void)
{
     if ( LPC_TMR32B0->IR & 0x01 )     // check interrrupt from MR0
     {
       LPC_TMR32B0->IR = 1; //reset flag
       count++; 
     }
}

int main(void) {
   LPC_SYSCON->SYSAHBCLKCTRL |= (1<<9);     //enable clock on TC32B0

   LPC_GPIO1->DIR |= (1<<6);     // P1.6 as output
   
   LPC_TMR32B0->MCR = 3; //enable interrupt + interrupt when TC = MR0
   LPC_TMR32B0->MR0 = 1091; //match register
   NVIC_EnableIRQ(TIMER_32_0_IRQn);//enable interrupt
   LPC_TMR32B0->TCR = 1; //enable timer

   while(1) {
        if (count >= 44000)
       {
            count = 0;
            LPC_GPIO1->DATA ^= (1<<6);
       }
   }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍