Desperate wirh Interrupt :( Please help me

[amoreno]

Posted on December 13, 2007 at 11:21

Desperate wirh Interrupt :( Please help me

[amoreno]

Posted on November 08, 2007 at 12:35

Hello,

I’m really desperate with my first program with AMR.

Trying to set up the timer2 to do a simple interrupt every certain time, it doesn’t work.

My code is:

************************* MAIN CODE ****************************

int main()

{

debug();

GPIO_Config (GPIO1, 0x0100, GPIO_OUT_PP); //Led

GPIO_BitWrite(GPIO1, 8,0);

/*********** TIMER ****************/

TIM_Init(TIM2

TIM_PrescalerConfig(TIM2,0x0000 );

TIM_ClockSourceConfig(TIM2, TIM_INTERNAL);

TIM_ITConfig(TIM2, TIM_TO_IT, ENABLE);

TIM_CounterConfig(TIM2, TIM_START);

/************ EIC ******************/

EIC_IRQChannelConfig(T2TIMI_IRQChannel, ENABLE);

EIC_IRQChannelPriorityConfig(T2TIMI_IRQChannel, 10);

EIC_IRQConfig(ENABLE);

while (1)

{;}

}

******************** INTERRUPT CODE 71x_IT.c *****************

void T2TIMI_IRQHandler(void)

{

GPIO_BitWrite(GPIO1, 8,0);

GPIO_BitWrite(GPIO1, 8,1);

}

The program never goes to the interrupt routine. Why?? I don’t understand.

The compilation doesn’t report any error but simply not works.

Do I have to ''link'' the archive 71x_IT.C to project in any special form?

Software: IAR Workbench 5.0 Quickstar (already tested on EV 4.0 and 5.0 and quickstar 4.4 versions)

My hardware is: IAR quickstart Kit STR711 SK/IAR

I’d appreciate your help very much. Note that this is my first program.

Thanks

Alfa

P.D. Comparing with another examples interrupts I see that grup “startup� in not in my program. What is this?

[jpeacock2]

Posted on November 08, 2007 at 13:11

Where do you enable the peripheral clock for the timers?

MRCC_PeripheralClockConfig(MRCC_Peripheral_TIM2, ENABLE);

[amoreno]

Posted on November 08, 2007 at 14:06

Thank you for your quick reply.

I have added your suggestion but don’t work. An error is returned.

I was looking for any information about this instruction but… is it really for STR71x ? I can’t find it in reference manuals…

By the way, I have observed that ANY interrupt is served (tried also with UART).

Let me explain please.

If I take an example from library, the interrupts are served. No problem

But if I start a new project, the interrupts never are served. Why ?

I have observed that STARTUP group is in example but not in my project.

(these group include 71x_vect.s and 71x_init.s).

Could it be the problem?

I don’t have these files included or generated in my project.

How can I do it?

Your help is much appreciated.

Best regards.

[kaouther]

Posted on December 03, 2007 at 13:45

Dear amoreno,

To enable the clock for TIM2 on STR71x, you have to use the following function;

'' /* Enable TIM2 clock on APB2 */

APB_ClockConfig (APB2, ENABLE, TIM2_Periph );''

However, ''MRCC_PeripheralClockConfig'' function is used with STR75x product.

The 71x_vect.s and 71x_init.s need to be included in your project;

The 71x_vect.s contains exception vectors and exception handlers while the 71x_init.s initializes stack pointers and interrupts for each mode.

ST offers a

http://www.st.com/mcu/download2.php?file=str71xfwlib.zip&info=STR7 Software STR71x&url=http://www.st.com/stonline/products/support/micro/files/str71xfwlib.zip

with project template for standard software toolchain to easy start with and reduce chance for error.

Enjoy ;)

[amoreno]

Posted on December 13, 2007 at 11:21

Hello Moderator

Thank you very much for your reply. Now the program in runnig ok.

Regards.

AMoreno