Interval Timer IP doesn't work

[Gyud0]

Hey,

I would like to use Interval Timer IP in order to measure execute time of a command by NIOS2 processor. My system frequency is 50MHZ.

I configured it by the properties:

1) Timeout period - 100ms.

2)Counter size:32.

3)Registers- Readable snapshot.

My whole ststem consist- NIOS2 processor,Interval Timer,JTAG UART and System ID.

the addresses range for the Interval Timer is 0x401000 up to 0x20103f.

In Eclipse, In Hal properties I chose SYS_CLK_TIMER :None. Also when I chose the Interval Timer it not works.

Can you help me please?

my C code is:

#include<stdio.h>

#include "io.h"

#include "system.h"

#include "altera_avalon_timer_regs.h"

#include "altera_avalon_timer.h"

#define SYS_CLK_TIMER_BASE 50000000

int main()

{

int a=3;

int b=5;

int c;

int snapl,snaph;

IOWR_ALTERA_AVALON_TIMER_PRIODH(SYS_CLK_TIMER_BASE,0XFFFF); //initiate PERIODH register

IOWR_ALTERA_AVALON_TIMER_PRIODl(SYS_CLK_TIMER_BASE,0XFFFF);//initiate PERIODL register

IOWR_ALTERA_AVALON_TIMER_SNAPL(SYS_CLK_TIMER_BASE,0X1);// first writing to either snapl or snaph to request a coherent snapshot of the counter

IOWR_ALTERA_AVALON_TIMER_CONTROL(SYS_CLK_TIMER_BASE,0X4);//START THE COUNTER

c=a+b;//the command that need to measure

IOWR_ALTERA_AVALON_TIMER_CONTROL(SYS_CLK_TIMER_BASE,0X8);//STOP THE COUNTER

snapl=IORD_ALTERA_AVALON_TIMER_SNAPL(SYS_CLK_TIMER_BASE);

snaph=IORD_ALTERA_AVALON_TIMER_SNAPH(SYS_CLK_TIMER_BASE);

printf("snapl=%d\n",snapl);

printf("snaph=%d\n",snaph);

//printf("The time to execute is=\n", (snaph-(snapl<<16))/ (1/SYS_CLK_TIMER_BASE);

return 0;

}

The output of this code is:

snapl=1;

snaph=0;

[Ahmed_H_Intel1]

Hi, I will try the same design and replicate this issue. It should be working.

[Ahmed_H_Intel1]

Hi, BTW there are two modes ( system clock timer, and timestamp timer) once you set the timer as one mode you cannot use the other. Please check this. I am creating an example for you.

[Ahmed_H_Intel1]

Hi Gyud0,

Attached is an example I've created to use the Interval timer IP on DE0-Nano_soc board. The example is working fine, please review it and replicate it on the board you have.

Regards,