Hi, I was reading the example code "hello_ucosii.c", but when I modify the code he made only the task1. My code modified is:
I'm use Quartus II 9.1 sp2 web edition, Nios II EDS 9.1 sp2 and the DE2 board series.
Thank you in advance
Code:
#include <stdio.h>
#include "includes.h"
#include "system.h"
#include <unistd.h>
#include "altera_avalon_pio_regs.h"
#include "alt_types.h"
/* Definition of Task Stacks */
#define TASK_STACKSIZE 2048
OS_STK task1_stk[TASK_STACKSIZE];
OS_STK task2_stk[TASK_STACKSIZE];
/* Definition of Task Priorities */
#define TASK1_PRIORITY 1
#define TASK2_PRIORITY 2
/*Subroutine for wait a necessary time for each level of PWM signal*/
int count(float n, float f)
{
int i;
float a, x;
x=(1/f)*2000000;
a=n*x;
for(i=1; i<=a; i++)
{
x=0;
}
return n;
}
/* Gerate a PWM Signal */
void task1(void* pdata)
{
int signal, control;
float f, n;
f=100;//22Hz in practice
while(1)
{
control=IORD_ALTERA_AVALON_PIO_DATA(DUTY_PIO_BASE);
if(control==0x0)
{
signal=0x0;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
}
if(control==0x1)
{
n=0.25*(1/f);
signal=0x1;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
n=count(n,f);
n=(1-0.25)*(1/f);
signal=0x0;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
n=count(n,f);
}
if(control==0x3)
{
n=0.50*(1/f);
signal=0x1;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
n=count(n,f);
n=(1-0.50)*(1/f);
signal=0x0;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
n=count(n,f);
}
if(control==0x7)
{
n=0.75*(1/f);
signal=0x1;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
n=count(n,f);
n=(1-0.75)*(1/f);
signal=0x0;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
n=count(n,f);
}
if(control==0xf)
{
signal=0x1;
IOWR_ALTERA_AVALON_PIO_DATA(PWM_PIO_BASE, signal);
}
}
}
/* Prints "Hello World" and sleeps for three seconds */
void task2(void* pdata)
{
while (1)
{
printf("Hello from task2\n");
OSTimeDlyHMSM(0, 0, 3, 0);
}
}
/* The main function creates two task and starts multi-tasking */
int main(void)
{
OSTaskCreateExt(task1,
NULL,
(void *)&task1_stk[TASK_STACKSIZE-1],
TASK1_PRIORITY,
TASK1_PRIORITY,
task1_stk,
TASK_STACKSIZE,
NULL,
0);
OSTaskCreateExt(task2,
NULL,
(void *)&task2_stk[TASK_STACKSIZE-1],
TASK2_PRIORITY,
TASK2_PRIORITY,
task2_stk,
TASK_STACKSIZE,
NULL,
0);
OSStart();
return 0;
}Thank you in advance