Discussion in "ARM Development" started by    bonois_dailleurs    Aug 22, 2010.
Sun Aug 22 2010, 12:56 AM
#1
hi
i'm performing programs for lpc2378 with arm7TDMI , and i'm using timer0 interrupt
my IDE is keil microvision4

here is my code

#include <LPC23xx.H>
#include <stdio.h>





void isr_T0()__attribute__((interrupt("irq")))
{
FIO2SET |= 0x3;
VICVectAddr0 = 0 ;
T0IR = 0x1 ;
}

void init_T0()
{

T0TCR = 0;
T0MR0 = 1500 ;
T0MCR = 0x3 ;
FIO2DIR = 0x3 ;
FIO2MASK = 0xFF ;
VICIntEnable = 0x00000010 ;

VICVectAddr4 = (int)isr_T0 ;
}

void main()
{
init_T0() ;
T0TCR = 0x1 ;

while(1) {}
}

as you can notice i'm trying to set P2.0 and P2.1 , thing that never happens while simulating
i don't know anymore about this trouble , which makes me mad because it does'nt let me step foreward
if someone knows anymore about the probleme , please answer me
Mon Aug 23 2010, 11:36 AM
#2
keil follows a different coding style than ARM-GCC

so you have to write
void isr_T0()__attribute__((interrupt("irq")))

as

void isr_T0() __irq

and try again. i doubt why you did not get any error when building.
Tue Aug 24 2010, 08:56 PM
#3
i've tried both :
void ir_T0()__irq and void isr_T0__attribute__((interrupt'"irq")))
while debugging i've ckecked up in periphrals the state of all registers ,
for every time , the case (interrupt on MR0) is ticked , and T0IR took OXO1
but the leds 'P2.0 , p2.1' are never set to 1
so i'm asking my self a lot of questions , what am i doing ????
i can't really see a true interrupt , so i can't go foreward !!!
so if you know anymore about my trouble , pleae tell me

thank you in advance
Wed Aug 25 2010, 05:03 PM
#4
well you forgot to configure those pins as o/p

do it by setting direction on FIO2DIR.

FIO2DIR |= 0x03;
Thu Aug 26 2010, 09:59 AM
#5
i've already set pins as output by writing : FIO2DIR = 0x3 ; or even
FIO2DIR |= 0x03 ;
still the same trouble !!!
is it because i'm using an evaluation softaware downloaded from KEIL.com ??
other request have you ever written a programme including interrupts in which you saw your routine performing what did you tell it to do ??
if yes , can you give me this exemple ??

and thank you for helping me
Thu Aug 26 2010, 06:07 PM
#6
here is a small example for toggling P2.0

#include <LPC23xx.H>
#define INT_TMR0	4

void T0ISR() __irq {
	T0IR = 0x01;

	if(FIO2PIN & 0x01){
		FIO2CLR |= 0x1;
	} else
		FIO2SET |= 0x01;

	VICVectAddr = 0;
}

static void InitTimer(void){
	T0TCR = 0x02;
	T0MR0 = 0x1000;
	T0MCR = 0x03;
	
	VICVectAddr4 = (unsigned long)T0ISR;
	VICVectPriority4 = 0;
	VICIntEnable = 1 << INT_TMR0;

	T0TCR = 0x01;
}

int main (){
	FIO2DIR = 0x01;
	InitTimer();
	while(1);
}
Tags LPC23xx timer exampleLPC2378 timer0 code example
Sat Aug 28 2010, 12:28 AM
#7
even in this exemple , it doesn'e enter the isr at all
i've tried to initialise FIO2PIN |= 0x1 but without any success
i've looked into the step by step mode when debugging
may be i could find out what's the matter
and by following the arrow which indicate which part of the program is being executed , i've seen that it didn't move to isr at all so i guessed there is a problem somewhere
here is all suppositions that i've tried :
*)enabling first and then giving the adress to the interrupt vector (VICVectAddr)
*)looping just with the function init_TIMER() , because timer initialisations don't change and all the action is performed by the isr
i mean it's enabled , setting pin , disabled (loop )
*)i've notices that the case of "interrupt on MR0" is always ticked and T0IR always takes one

for conclusion i think that my programme is not correctly built and there is some detail that i can't find out and which making me just turning around

other thing i would like to thank you for helping me !!

of course if you got a solution please tell me
Sat Aug 28 2010, 07:59 PM
#8
The code i posted is checked and working..

if you are using a simulator you can simply put a breakpoint and see for yourself.

I am really not sure what exactly are you doing when testing the code i provided. Timer is configured for interrupt and reset on match, which is working fine.
Sat Aug 28 2010, 10:31 PM
#9
which IDE do you use
concerning me i'm using KEIL microvision 4 "evaluation software", downloaded from keil.com
did you try your programme on your software and did it work ??

i have always LINUX ubuntu , and i know that we can work with arm-gcc
but i dont' know if we can simulate to see the result

may be i should use another IDE just to be sure that i'm not loosing my time

thank you in advance
Mon Aug 30 2010, 09:30 PM
#10
I wrote this code for Keil uVision 4. I am attaching complete project here for your reference. check it.




also adding a screenshot from debug.

Get Social

Information

Powered by e107 Forum System

Conversation

Fri Dec 15 2017, 12:18 PM
mehari
can not find dhtxx.md file in proteus 8.0 can anybody help me please?
sahar7478
Fri Dec 08 2017, 12:47 PM
can i get gsm a6 library? can anybody help? tia
Faiqa
Sat Nov 25 2017, 08:32 AM
Can i get the code of Monitering and controlling of green house effect? ... Can anyone help me ?
Wed Nov 08 2017, 01:35 PM
Anirudh jain
I want to burn code in atmel 89s51 24pc 0329 but cannot get the connection with the burner. Can somebody provide me with the circuit diagram for connecting controller to burner. I'm using usb burner
Thu Nov 02 2017, 11:44 AM
karpal
write a program to exchange the content of b register with external RAM address 02CFH help me
Wed Nov 01 2017, 05:47 PM
sanae
i am using the DHT11 but i'm getting some errors in the simulate the programe in proteus 8 professional,: 1)cannot find model file 'DHTXX.MDF'.2)simulation failed due to netlist linker error(s).
Fri Sep 29 2017, 02:45 AM
Maaz
i am doing the same project on verilog please contact me [email protected]
Wed Sep 20 2017, 12:36 AM
Ted
In a missing pulse detector using a 555 timer connected as a monostable vibrator with a PNP transistor,how does the positve input pulse turn on the PNP transistor?
Sun Sep 03 2017, 02:29 PM
martymarty
How do I connect an <NOKIA 1100 LCD > to an atmega328P ?
poojab51296
Sun Aug 20 2017, 10:23 AM
i am intending to interface sd card with STM32F4 and want to write a file in sd card using SPI protocol but using HAL only. Can anyone help me PLEASE!!!!

Downloads

Comments

johaneras
Fri Dec 15 2017, 08:58 AM
roopay
Wed Dec 13 2017, 07:11 AM
janvimandeep
Mon Dec 11 2017, 01:05 PM
fernanmonroy2
Mon Dec 11 2017, 08:33 AM
sahar7478
Fri Dec 08 2017, 12:34 PM
zhudao
Tue Dec 05 2017, 06:14 AM
chetan6379
Sat Dec 02 2017, 03:42 PM
HaloSpartanOdst
Fri Dec 01 2017, 12:05 PM

Online

Guests: 73, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 37929
Newest member: johaneras
Forum Activity
johaneras Avatar
Posted By johaneras
Fri Dec 15 2017, 09:08 AM
Good day Rikckey's WorldI have a huge project wher...
fernanmonroy2 Avatar
Posted By fernanmonroy2
Mon Dec 11 2017, 08:40 AM
Que significa que el contador de programa abordar...
zhudao Avatar
Posted By zhudao
Wed Dec 06 2017, 03:08 AM
I think either your 120 - 5 volt adapter, or the L...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Dec 05 2017, 08:12 PM
I think either your 120 - 5 volt adapter, or the L...
zhudao Avatar
Posted By zhudao
Tue Dec 05 2017, 06:41 AM
Hi to all, in the period time I'm doing an project...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon Nov 20 2017, 10:18 PM
Here is a version of the tutorial that reads a key...
Ansh12 Avatar
Posted By Ansh12
Mon Nov 20 2017, 02:15 AM
As a starting point, can you tell us how much of t...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sun Nov 19 2017, 08:35 PM
As a starting point, can you tell us how much of t...
Ansh12 Avatar
Posted By Ansh12
Fri Nov 17 2017, 04:07 AM
I am looking keypad interfacing program. I was rea...
JardCrocker Avatar
Posted By JardCrocker
Wed Nov 08 2017, 05:29 PM
Hi...i am a new user here. I was also facing the s...