miaobiaochengxu.txt

利用NIOS和QUARTUS系统完成一个秒表的功能

#include <stdlib.h>
#include <stdio.h>
#include "sys/alt_irq.h"
#include "altera_avalon_pio_regs.h"
#include "alt_types.h"
#include <unistd.h>
#include "system.h"
#include "altera_avalon_timer_regs.h"
#include "priv/alt_busy_sleep.h"

#define ESC 27
#define ESC_TOP_LEFT "[1;0H"
#define ESC_CLEAR "[2J"
#define ESC_COL2_INDENT2 "[2;2H"
#define ESC_COL2_INDENT4 "[2;4H"
#define ESC_COL2_INDENT "[2;13H"
#define ESC_COL2 "[2B"

volatile long TimerCount=0;
volatile long MAX_COUNT=3600*24*100;

volatile int Buttons=0x000f;
volatile alt_u8 count;
volatile alt_u8 i=0;
volatile alt_u8 j=0;
volatile alt_u8 k=0;
volatile long counter[50];
volatile char s[]="     stop       ";
volatile char z[]="2-sta;8-stop    ";
volatile char ji[]="2-memorize        ";
volatile char x[]="2+4-";

static FILE  *lcd;

static void start_timer(void)
{
  IOWR_ALTERA_AVALON_TIMER_CONTROL(SYS_TIMER_BASE, 0x07);
  return;
}

static void pause_timer(void)
{
  IOWR_ALTERA_AVALON_TIMER_CONTROL(SYS_TIMER_BASE, 0x8);
  return;
}

static int show_timer(void)
{ 
   fprintf(lcd, "%c%s%02d:%02d:%02d:%02d\n",ESC,ESC_TOP_LEFT,
                 (TimerCount/360000)%24,
                 (TimerCount/6000)%60,
                 (TimerCount/100)%60,
                 (TimerCount%100));
   fprintf(lcd,"                \n");
}

static void show(m)
{ 
   fprintf(lcd, "%c%s%02d:%02d:%02d:%02d\n",ESC,ESC_TOP_LEFT,
                 (m/360000)%24,
                 (m/6000)%60,
                 (m/100)%60,
                 (m%100));
  return 1;
                  
}


static void showr(x)
{
 fprintf(lcd,"%c%s%02d-record\n",ESC,ESC_COL2_INDENT4,x);
 return 1;
}
static void showinf(t)
{
 fprintf(lcd,"%c%s%s\n",ESC,ESC_COL2_INDENT,t);
 return 1;
}

static void showa(s)
{
 fprintf(lcd,"%c%s%d\n",ESC,ESC_COL2_INDENT2,s);
 return 1;
}

static void showinfor(i)
{
 fprintf(lcd,"%c%s%s\n",ESC,ESC_COL2_INDENT4,i);
 return 1;
}


////////////////////////////////////////////////////////////
static void button_interrupts(void* context, alt_u32 id)
{
 alt_u8 a;
 alt_u8 n=0;
 //volatile alt_u8 k=0;
 volatile alt_u8 *countptr = (volatile alt_u8 *)context;
 a=*countptr;
 usleep(50000);
 if(~(IORD_ALTERA_AVALON_PIO_DATA(BUTTON_PIO_BASE))&0x01)
 {
  a=a+1;
  printf("%d\n",a);
  showa(a);
  switch(a)
    {
      case 1:showinfor(z);
            break;
      case 2:showinfor(ji);
            break;
      case 3:showinfor(x);
            break;
      //case 4:fprintf(lcd,"                \n");
        //    break;
    }
 } 
  if(a>3)  a=0;  
 *countptr=a;
 switch(a)
 {case 1:
 {
  showinfor(z);
  usleep(50000);
  if(~(IORD_ALTERA_AVALON_PIO_DATA(BUTTON_PIO_BASE))&0x02)  //开始计时
  {
    i=0;
    j=0;
    k=0;
   start_timer();
   TimerCount=0;
   show_timer();
  }
  else if(~(IORD_ALTERA_AVALON_PIO_DATA(BUTTON_PIO_BASE))&0x08) //停止计时
  {
   pause_timer();
   show_timer();
   showinf(s);
   showa(a);
 
  }
 }
  break;
 case 2:  //记录时间
  { 
    showa(a);
    showinfor(ji);
    usleep(50000);
   if(~(IORD_ALTERA_AVALON_PIO_DATA(BUTTON_PIO_BASE))&0x02) 
   { 
    i++;
    counter[i]=TimerCount;
    printf("   i=%d ---j=%d       ",i,j);
    printf("%02d:%02d:%02d:%02d\n",
                 (counter[i]/360000)%24,
                 (counter[i]/6000)%60,
                 (counter[i]/100)%60,
                 (counter[i]%100));
    j=i;
   }
  }
  break;
 case 3:  //显示记录的时间2--递增显示；4--递减显示
   { 
    showinf(x);
    showa(a);
    usleep(50000);
    if(~(IORD_ALTERA_AVALON_PIO_DATA(BUTTON_PIO_BASE))&0x02) //正向显示
    {  
     n++;
     k++;
     show(counter[k]);
     while(n!=0)
      { 
        showr(k);
        printf("    %d  ---inc~~record      ",k); //递增显示
        printf("%02d:%02d:%02d:%02d\n",
                        (counter[k]/360000)%24,
                        (counter[k]/6000)%60,
                        (counter[k]/100)%60,
                        (counter[k]%100));     
        n--;
      }
    }
   else if(~(IORD_ALTERA_AVALON_PIO_DATA(BUTTON_PIO_BASE))&0x04) //逆向显示
    {  
     n++;
     //j--;
     show(counter[j]);
     printf("    %d  ---des~~record      ",j);  //递减显示
     //j--;
     showa(a);
     while(n!=0)
      {      
       showr(j);
     //  printf("    %d  ---des~~record      ",j);  //递减显示
       printf("%02d:%02d:%02d:%02d\n",
                        (counter[j]/360000)%24,
                        (counter[j]/6000)%60,
                        (counter[j]/100)%60,
                        (counter[j]%100));
       n--;
      }
      j--;
    }
   }
  break;
 }
 }

//////////////////////////////////////////////////////////////////


static void handle_Timer0_interrupts(void* context, alt_u32 id)
{
 TimerCount++;
 if(TimerCount>=MAX_COUNT)
   TimerCount=0;
  show_timer();
  IOWR_ALTERA_AVALON_TIMER_STATUS(SYS_TIMER_BASE, 0);
  } 

////////////////////////////////////////////////////


int main(void)
{
  count=0;
  lcd=fopen("/dev/lcd","w");
 IOWR_ALTERA_AVALON_PIO_IRQ_MASK(BUTTON_PIO_BASE,0xf);
 IOWR_ALTERA_AVALON_PIO_EDGE_CAP(BUTTON_PIO_BASE,0x0);
 alt_irq_register(BUTTON_PIO_IRQ, (void *)&count, button_interrupts);
 alt_irq_register(SYS_TIMER_IRQ, (void *)&count, handle_Timer0_interrupts);
 IOWR_ALTERA_AVALON_TIMER_CONTROL(SYS_TIMER_BASE, 0x08);
 show_timer();
 while(1)
 {;}
  fclose(lcd);
  return 0;
}