hi all
this is how i initialize the timer1
void init_timer1(void) { T1MR1 = 15999999;//15990; T1MCR = 3; T1TCR = 1; T1CTCR = 0x00; VICVectAddr5 = (unsigned long)T1_IRQHandler; VICVectCntl5 = 14; VICIntEnable = (1 << 5); }
__irq void T1_IRQHandler (void) { volatile unsigned int pin_status; pin_status = FIO4PIN;
if((pin_status & 0x20000000) == 0x20000000) { FIO4CLR |= 0x20000000; } else { FIO4SET |= 0x20000000; } }
this timer1 is not working in timer0 and timer1 i have initialized as similar which toggles the pin every one sec.here timer0 generates the interrupt and i get the pin toggled but i have the problem with timer1 the pin doesnt toggle so i doubt tht timer1 is not initialized or its not able to generate interrupt so can any one help me to rectify the doubt i have given the code how i initialize the time and the interrupt code ...the default PCONP is set .
Regards suresh
the above code works for timer0 but not for timer1 so wt might be the problem ......do i have to set any other register to make it work
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Hello Suresh Kumar,
You must acknowledge the interrupt in your interrupt service routine.
The following code runs on a Keil evaluation board MCB2300 and toggles the LEDs P2.0, P2.1 with 1Hz.
/* Timer0 IRQ: Executed periodically */ __irq void T0_IRQHandler (void) { volatile unsigned int pin_status = FIO2PIN; if (pin_status & (1 << 0)) FIO2CLR = (1 << 0); /* LED off */ else FIO2SET = (1 << 0); /* LED on */ T0IR = 1; /* Clear interrupt flag */ VICVectAddr = 0; /* Acknowledge Interrupt */ } /* Timer1 IRQ: Executed periodically */ __irq void T1_IRQHandler (void) { volatile unsigned int pin_status = FIO2PIN; if (pin_status & (1 << 1)) FIO2CLR = (1 << 1); /* LED off */ else FIO2SET = (1 << 1); /* LED on */ T1IR = 1; /* Clear interrupt flag */ VICVectAddr = 0; /* Acknowledge Interrupt */ } int main (void) { PINSEL10 = 0; /* Disable ETM interface, enable LEDs */ FIO2DIR = 0x000000FF; /* P2.0..7 defined as Outputs */ FIO2MASK = 0x00000000; /* Enable and setup timer interrupt, start timer */ T0MR0 = 11999999; /* 1sec = 12000000-1 @ 12.0 MHz*/ T0MCR = 3; /* Interrupt and Reset on MR0 */ T0TCR = 1; /* Timer0 Enable */ VICVectAddr4 = (unsigned long)T0_IRQHandler;/* Set Interrupt Vector */ VICVectCntl4 = 15; /* use it for Timer0 Interrupt */ VICIntEnable = (1 << 4); /* Enable Timer0 Interrupt */ /* Enable and setup timer interrupt, start timer */ T1MR0 = 11999999; /* 1sec = 12000000-1 @ 12.0 MHz*/ T1MCR = 3; /* Interrupt and Reset on MR1 */ T1TCR = 1; /* Timer0 Enable */ VICVectAddr5 = (unsigned long)T1_IRQHandler;/* Set Interrupt Vector */ VICVectCntl5 = 15; /* use it for Timer0 Interrupt */ VICIntEnable = (1 << 5); /* Enable Timer0 Interrupt */ while (1); /* Loop forever */ }
Best Regards, Martin Guenther
sorry i had the acknoledge statement it some how got missed it the above published code ... its working now the mistake was i loaded the value in TXMR1 instead of TxMR0. so when TXMR0 is loaded with the value the timer is working but y not when TxMR1,TxMR2,TxMR3 any reason to make it workable ....