Archives
-
LPC2478 Timer0 interrupt
I’m busy with a Timer interrupt, but it seems not to work and I search a lot in the examples code and have used a lot but nothing likes to work:
Code.h:
void Timer0_irq (void) __attribute__ ((interrupt (“IRQ”)));;Code.c
/**********************************************************
Functie: Timer0 irq
**********************************************************/
void Timer0_irq(void)
{
print(“T”);timer0_counter++;
if(timer0_counter == 500)
{
flag_time = 1 ltlt flag_time_500ms;
timer0_counter = 0;}
T0IR = 1; //Clear interrupt flag
VICVectAddr = 0; //Acknowledge Interrupt
}
/*********************************************************//**********************************************************
Functie: Timer0 init
**********************************************************/
void Timer0_init(void)
{
T0MR0 = 12000;
T0MCR = 0×03; //Interupt when MR0 is TC amp TC is reset when MR0 matches itVICVectAddr4 = (U32)Timer0_irq; //Timer0 irq
VICVectCntl4 = 15;
VICIntEnable = (1 ltlt 4); //Enable Timer0 irqT0TCR = 0×01; //Timer enabeled
return;
}
/*********************************************************/
Related Forum Messages
- Interrupt program
- LPC2468 timer interrupt
- Can’t get LPC2148 timer match interrupts to work
- Problem regarding timer0 in the lpc2378
- LPC 3250 Timer 0 interrupt
- Explanation of logomatic IRQ frequency asked
- [SOLVED] LPC2124 timer in Proteus
- C8051 adc in c programming
- Problem timer0 interrupt PIC18F4550
- Problem with timer and reading frequency
- Simple LED with timer on PIC18 C18 Compiler
- I want timer program to generate pulse using 10khz frequency
- IRQ meaning
- Problem with Timer0 Interrupt
- Need help: Timer0 in interrupt mode
- Need help with PWM,Interrupt and Timer0 coding in C language on PIC18F
- Atmega162: to check the Timer0 ticking
- Anomalous Timer0 Behavior w/External Interrupts
- Interrupt on timer
- Set PWM o/p pin in AT89C51CC01
i tried to execute a timer program in ARM7- LPC2148 series.....but i got a problem in matching the vector address....can anyone help me to find a solution for this.... this was the program #include "lpc21xx.h" void initTimer(void); //void initPLL(void); void T0ISR(void) __irq; int main(void) { initTimer(); while(1) { __nop(); } return 0; } void initTimer(void) { VPBDIV=0x00000002; // 60 MHz - Div by 6 T0IR = 0x00000000; IODIR1=0x000F0000; // P1^16 =LED --gt Output T0PR = 0x0000001E; // Clk =gt 1 MHz =gt 1 uSec T0TCR= 0x00000000; // Disable Timer0 T0MCR= 0x00000003; // T0MR0= 10000000; // Count upto 1 Sec duration T0TCR= 0x00000001; // Enable Timer0 ...Hi guys I am going through a very strange problem, I made a code which comes in timer interrupt after certain period of time but even after correct configuration of all registers the code is not coming in ISR even in the simulator. But in simulator it is observed that the interrupt flag is setting. Follwoing is the sorce code __irq void T2_IRQHandler (void) //x milli second timer { T2IR = 1; // Clear interrupt flag VICVectAddr = 0; // Acknowledge Interrupt ...I wrote this little test program and can't get the interrupt to fire. I've been over it and over it. Looks right to me (not that that means anything ). I'm using Eclipse/yagarto (GCC). Can anyone spot what I'm doing wrong here? Code: #include "LPC214x.h" #define PLOCK 0x400 void init(void); void IRQ_Routine (void) __attribute__ ((interrupt("IRQ"))); void FIQ_Routine (void) __attribute__ ((interrupt("FIQ"))); void SWI_Routine (void) __attribute__ ((interrupt("SWI"))); void UNDEF_Routine (void) __attribute__ ((interrupt("UNDEF"))); int main(void) { int i; IODIR0 = 0x30600000; IOCLR0 = 0x30600000; ...Hi i am currently working on the mcb2300. the timer0 is used.Iam just toggling the led ports.In the simulation i am able to get the output but regarding the hardware i am not able to see the toggling of the led's. Here i am posting the code snippet.kindly help me to solve the problem. Thanks in advance.... #include<stdio.h> #include <LPC23XX.H> void T0isr(void); void time_init(void); void delay(void); unsigned int value; void led_init(void); void delay(void); int main(void) { PLLCON=0x00; CLKSRCSEL=0x01; CCLKCFG=0x03; PCONP=0x00000002; time_init(); T0PR=0x0000C6C0; T0TCR=0x02; T0MCR=0x0003; T0MR0=0x00000005; T0TCR=0x01; //T0CR0=0x01; T0TC=0x00; //T0CTCR=0x00; T0PC=0x00; FIO2DIR=0x000000FF; FIO2MASK=0x00000000; FIO2SET=0x00000055; FIO2CLR=0x000000AA; T0IR=0x01; VICVectAddr4 = (unsigned)T0isr; VICVectPriority4=0X00000024; //Enable the interrupt VICIntEnable |= 0x00000010; while(1); } void time_init() { PCLKSEL0=0x0000000C; PINSEL3=0x03000000; PINMODE3=0x00000000; } void T0isr(void) { FIO2CLR = 0x000000AA; FIO2SET = 0x00000055; T0IR |= 0x00000001; //Dummy write to signal end of interrupt VICVectAddr = 0x00000000; }I am trying to test the timer for LPC3250.I am not sure what is issue with the below code.Interrupt is getting enabled but it is getting in one after another interrupt because of which it is just stuck in ISR.I tired using the CDL and it also gives the same error. Please let me know if i am missing any setting. /* Timer example */ void time_task() { /*Init timer */ // int x =0; //term_dat_out(sendstr, sizeof(sendstr)); TIMCLK_CTRL1 |= 0x04; T0TCR =0; T0TCR =0; T0CTCR =00; T0MCR =0; T0CCR =0; T0EMR=00; T0TC=0; T0PC=0; T0PR=0; T0MR0 = 0; T0MR1 = 0; T0MR2 = 0; T0MR3 = 0; T0IR |= 0x01; /* Set up timer scale*/ //T0PR ...I tried to understand the frequency working of the logging but do not understand how it calculates the counter value for IRQ. The T0MR0 = 58982400 / freq; should match the clock speed of 12 mHz at a frequency of 1Hz. It is 4,9 times bigger. I tested the frequency and it really works at 20Hz. Does anyone know how it works? This is the timer setup code: void mode_2(void) { rprintf("MODE 2\n\r"); enableIRQ(); // Timer0 interrupt is an IRQ interrupt VICIntSelect amp= ~0x00000010; // Enable Timer0 interrupt VICIntEnable |= 0x00000010; // Use slot 2 for UART0 interrupt VICVectCntl2 = ...Hello friends, I was trying to simulate TIMER0 of LPC2124 in Proteus but in vain. I've configured my timer to blink two LEDs at P0.0 amp P 0.1 every 1 sec. But the LED blinks with a delay of 3-4 sec. Also the simulation log says "simulation is not running in real time due to excessive cpu load". you can have a look at my code. Crystal = 10 MHz Microcontroller = LPC2124 Code: #include<LPC21xx.h> void TMER0_INITIALIZE(void); void PINSELECT(void); void delay_ms(unsigned int value); main() { char alter = 0; PINSELECT(); TMER0_INITIALIZE(); while(1) { if(alter) { IO0SET |= 0x03;delay_ms(10); } else { IO0CLR |= 0x03;delay_ms(10); } alter = ~alter; } } /************************************************** Common Pinselect function for all peripherals **************************************************/ void PINSELECT(void) { PINSEL0|= 0; //all GPIO ...hi, i need help for c programming of adc converter on c8051. may i know if my programming is correct cos i'm new at this . How can i put the result for adc in the assigned pin.thanks. CODE: #define SYSCLK 2000000 #define PULSE_WIDTH 35000d sbit LED = P2^4; ...Hello everybody; i neeeeeeeed your help please ! this is my program : Code: /** INCLUDES *******************************************************/ #include <p18cxxx.h> #include "bootloader.h" void low_ISR (void); void YourLowPriorityISRCode(void); #pragma code low_vector = 0x18 void low_ISR (void) { _asm goto YourLowPriorityISRCode _endasm } #pragma code #pragma interruptlow YourLowPriorityISRCode void YourLowPriorityISRCode(void) { INTCONbits.TMR0IF = 0; //Clear Timer 0 Interrupt Flag LATBbits.LATB0 =!(LATBbits.LATB0) ; //inverse the output } /** Ports Init ******************************************/ void Init_Portb(void) { TRISBbits.TRISB0 = 0; //RB0 = output LATBbits.LATB0 = 0; } /** TIMER0 Init ******************************************/ void EnableTimer (void) { TMR0H = 0x00; TMR0L = 0x00; T0CON = 0x01; // Timer disabled; prescalar of 1:4; 16 bit mode RCONbits.IPEN = 1; //Enable Interrupt Priorities INTCONbits.GIEL = 1; //Enable Low Priority Interrupt INTCONbits.GIE = 1; //Enable GlobalInterrupt INTCONbits.TMR0IE = 1; //Enable ...I want to detect frequency with ATmega 8,I have only timer0 and timer2,in this I way start Timer0 for counting signal edge and Timer2 after for controlling timer0,after 1 second timer2 stop operation and initialize timers,But in my code It seems that Timer0_overFlow never increase!Help please? Code: #include "avr/io.h" #include ltutil/delay.hgt #include ltavr/interrupt.hgt #include "usart.h" int Timer2_overFlow = 0, Timer0_overFlow = 0; int frequency = 0; ISR(TIMER0_OVF_vect) { Timer0_overFlow++; TCCR0 = 0x06; TCNT0 = 0; TIMSK = (1 ltlt TOIE0); } void Timer0_init() { TCCR0 = ...Hi guys, I can't get this to work. I am using the internal oscillator at 31 kHz and have a prescale value of 1:128 with the 8-bit timer. If I did my math right, this should take about 4 seconds for the timer interrupt flag to recieve a 1 after overflow. If someone can give me tips and/or advice, it would be greatly appreicated!!! Thanks! Here is my code: Code: #include <p18f14k50.h> //pragma codes #pragma code high_vector=0x08 #pragma config FOSC = IRC //enable the internal oscillator //function prototypes void oscillator(void); void timer(void); void high_isr(void); void interrupt_at_high_vector(void) { _asm goto high_isr _endasm } /*******Oscillator function - This function will set the oscillator to 31 ...here is my code..is it correct.if wrong plz help me to generate pulse of 10khz . #include ltLPC21xx.Hgt void T0isr(void)__irq; void delay(void) { VPBDIV = 0x00000002; //Set pclk to 30 Mhz PINSEL0 = 0x00000020; //Enable pin 0.2 as capture channel0 T0PR = 0x0000001E; //Load prescaler for 1 Msec tick T0TCR = 0x00000002; //Reset counter and prescaler T0CCR = 0x00000005; //Capture on rising edge of channel0 T0TCR = 0x00000001; //enable timer VICVectAddr4 = (unsigned)T0isr; //Set the timer ISR vector address VICVectCntl4 = 0x00000024; //Set channel VICIntEnable = 0x00000010; //Enable the interrupt } int main(void) { IODIR0=0X000000001; while(1) { IOSET0=0X00000001; delay(); IOCLR0=0X00000001; delay(); } } void T0isr (void)__irq { //static int value; //value = T0CR0; // read ...Does using the __irq at the end of the function automatically calls itself when an interrupt occurs? for e.g. void ISR_TIMER0(void) __irq { int interrupt; //-------------------------- if( T0IR amp _MR0 ) { interrupt = _MR0; if(isrT0MR0Handler != NULL) (*isrT0MR0Handler)(); //call Timer0-Match0 handler function } else if( T0IR amp _MR1) { interrupt = _MR1; if(isrT0MR1Handler != NULL) (*isrT0MR1Handler)(); //call Timer0-Match1 handler function } else if( T0IR amp _MR2) { interrupt = _MR2; if(isrT0MR2Handler != NULL) (*isrT0MR2Handler)(); //call Timer0-Match2 handler function } else if( T0IR amp _MR3) { interrupt = _MR3; if(isrT0MR3Handler != NULL) (*isrT0MR3Handler)(); //call Timer0-Match3 handler function } else if( T0IR amp _CR0) { interrupt = _CR0; if(isrT0CR0Handler != NULL) (*isrT0CR0Handler)(); //call Timer0-Capture0 handler function } else if( T0IR amp _CR1) { interrupt = _CR1; if(*isrT0CR1Handler != NULL) (isrT0CR1Handler)(); //call Timer0-Capture1 handler function } //-------------------------- T0IR |= interrupt; //clear interrrupt //-------------------------- } ...Hi all, I am using Timer0 as interrupt for display time on LCD. But when the interrupt occurs, it won't come back to the last executed command of interrupted. It is repeating the ISR. I am using embedded C. I don't know what is happening. I did my best. Please help me. here is my ISR void timer0() interrupt 1 { TH0 = 0xFC; TL0 = 0x17; time_display(); }Hello... I am using Atmega644p as target and I am using external 8MHz crystal. For the RTC clock I am using 32.768 KHz crystal to count for seconds etc... I am trying to use timer0 to find the pulse period... But first I need to make sure that timer0 is working properly... I am using the following code to operate the timer0 in interrupt mode and using an output pin to check the timer0 roll over frequency on a scope. Code: Tim0pin Alias Portd.7 ...I want to produce a frequency(I use PWM) for a certain period of time(timer0),then interrupt-on-overflow to stop the frequency for another period of time.So i should have tones play at certain interval.Below is my attempt on coding for that purpose and it isn't working...Please help me find where has gone wrong.Thanks ! Code : /** I N C L U D E S **************************************************/ #include "p18f46k20.h" #include "delays.h" #include "12 CCP PWM.h" // header file #include "08 Interrupts.h" /** V A R I A B L E S *************************************************/ #pragma udata // declare statically allocated initialized variables /** D E C L A ...Hello, All! When I initialize Timer0/1, how can I check amount of time spent by timer ticking, for example, if timer is configured for 10ms, how can I verify that 10ms really have gone. I suppose, I can attach probe of oscilloscope to pin1 of ATmega162 (according to datasheet it's OC0), but I don't see anything. Here is my code: ... // ISR for Timer0 SIGNAL(SIG_OUTPUT_COMPARE0) { LED0_blink(); //my function /* Timer/Counter0 initialization CLock source: system clock Prescaler value: 8 Clock value: Mode: increment CTC top=OCR0 Interrupt: enable */ void Timer0_Init(void) { TCCR0 = 0x00; //stop timer TCNT0 = 0x00; TCCR0 = _BV(CS01) | ...I want to use Timer0 to run a simple task scheduler. My application also requires two external interrupts. If I enable two or more - INT0, INT1, INT2 - Timer0 fails to run, or in one instance, runs way too fast. See comments in the following code. This is an actual example I'm working with to keep it simple. Code: // timer.c written for Imagecraft Pro version 7.22 // Output Pin PB0 monitored with a digital scope. #include ltiom32v.hgt #include ltAVRdef.hgt #define Toggle_Pin(x,y) (x ^= (1ltlty)) ...Hello, I have been trying for days now to understand the interrupts but with no luck. I have been looking for sample code on the net but I didn't find anything useful. What seems to be working for others is not working for me. For example, I found this code: CODE: #include ltp18f14k50.hgt//pragma codes #pragma code high_vector=0x08 #pragma config FOSC = IRC //enable the internal oscillator //function prototypes void oscillator(void); void timer(void); void high_isr(void); void interrupt_at_high_vector(void) { _asm goto high_isr _endasm } /*******Oscillator function - This function will set the oscillator to 31 kHz***********/ void oscillator(void) { //Set oscillator to 31 kHz OSCCONbits.IRCF2 = 0; OSCCONbits.IRCF1 = 0; OSCCONbits.IRCF0 = 0; //Device clock derived directly from the ...I am currently working with AT89C51CC01.One can see the Datasheet from the following link. http://www.atmel.com/dyn/..._documents/doc4129.pdf My work is to make program which gives PWM as output(In pin P1_7). Just check this code. #include <stdio.h> #include "reg_c51.h" #define PWMPIN P1_0 unsigned char pwm_width; void pwm_setup(); void timer0(); void main(void) { pwm_setup(); PWMPIN = P1_7; //timer0(); while(1); } void pwm_setup() { TMOD = 0; pwm_width = 200; EA = 1; ET0 = 1; TR0 = 1; } void timer0() interrupt 1 { if(!F0) //Start of High level { F0 = 1; //Set flag PWMPIN = P1_7; //Set PWM o/p pin TH0 = pwm_width; //Load timer TF0 = 0; //Clear interrupt flag return; //Return } else //Start of Low level { F0 = 0; //Clear flag PWMPIN = 0; //Clear PWM o/p pin TH0 = 255 - pwm_width; //Load timer TF0 = 0; //Clear ...