数码管的加减计数都是正常的
alt_irq_register的返回值为0，正常。并且在alt_irq全局变量中发现timer0已经被分配了中断向量irq1。
现在的问题是中断服务#include "time.h"
#include "unistd.h"
#include "altera_avalon_timer_regs.h"
#include "sys/alt_irq.h"
#include "stdio.h"
#include "stddef.h"
#include "system.h"
#include "altera_avalon_pio_regs.h"
#include "alt_types.h"
static unsigned int TH1;
unsigned char temp_TH1=0xff;
unsigned char temp_TL1=0xea;
static unsigned char PIN_MSC=1;
void isr(void * context, alt_u32 id)
{
while(1);
IOWR_ALTERA_AVALON_TIMER_CONTROL(TIMER_0_BASE, 0);
PIN_MSC=~PIN_MSC;
*(unsigned int *)BEEP_BASE =PIN_MSC;
TH1=temp_TH1;
TH1=(TH1<<8 | temp_TL1)*8;
IOWR_ALTERA_AVALON_TIMER_PERIODL(TIMER_0_BASE,TH1);
IOWR_ALTERA_AVALON_TIMER_PERIODH(TIMER_0_BASE,0);
IOWR_ALTERA_AVALON_TIMER_CONTROL(TIMER_0_BASE, ALTERA_AVALON_TIMER_CONTROL_ITO_MSK|ALTERA_AVALON_TIMER_CONTROL_START_MSK
);
}
#define data *(unsigned int *)SEGDATA_BASE
#define com *(unsigned int *)SEGCOM_BASE
unsigned char chcode(unsigned char x)
{
unsigned char da="0";
switch(x)
{
case 0x00: da="0x40";break;//0
case 0x01: da="0x79";break;//1
case 0x02: da="0x24";break;//2
case 0x03: da="0x30";break;//3
case 0x04: da="0x19";break;//4
case 0x05: da="0x12";break;//5
case 0x06: da="0x03";break;//6
case 0x07: da="0x78";break;//7
case 0x08: da="0x00";break;//8
case 0x09: da="0x10";break;//9
case 0x0a: da="0x08";break;//a
case 0x0b: da="0x03";break;//b
case 0x0c: da="0x27";break;//c
case 0x0d: da="0x21";break;//d
case 0x0e: da="0x06";break;//e
case 0x0f: da="0x0e";break;//f
}
return da;
}
int main (void) __attribute__ ((weak, alias ("alt_main")));
int alt_main (void)
{
alt_u8 led = 0x2;
int k;
unsigned char a="0",b=0xff,c,d,e,f;
unsigned int i,j;
//设置定时器为自由运行模式
IOWR_ALTERA_AVALON_TIMER_CONTROL(TIMER_0_BASE,
ALTERA_AVALON_TIMER_CONTROL_ITO_MSK |
ALTERA_AVALON_TIMER_CONTROL_CONT_MSK |
ALTERA_AVALON_TIMER_CONTROL_START_MSK);
//开始中断注册操作
k=alt_irq_register(TIMER_0_IRQ, TIMER_0_BASE, isr);
IOWR_ALTERA_AVALON_TIMER_PERIODL(TIMER_0_BASE, 0xffff);
IOWR_ALTERA_AVALON_TIMER_PERIODH(TIMER_0_BASE, 0xff);
IOWR_ALTERA_AVALON_TIMER_CONTROL(TIMER_0_BASE,
ALTERA_AVALON_TIMER_CONTROL_ITO_MSK|ALTERA_AVALON_TIMER_CONTROL_START_MSK );
IOWR_ALTERA_AVALON_TIMER_STATUS(TIMER_0_BASE, 1);
*(unsigned int *)TIMER_0_BASE=1;
//IOWR_ALTERA_AVALON_TIMER_IENABLE(TIMER_0_BASE, 1);
//*(unsigned int *)TIMER_0_BASE=1;
if(k!=0)
{
while(1);
}
while(1)
{
e=chcode((a&0xf0)>>4);
f=chcode(a&0xf);
a=a+1;
c=chcode((b&0xf0)>>4);
d=chcode(b&0xf);
b=b-1;
for(i=0;i<6000;i++)
{
if(i%500==0)
{
// led=0x2 | (0x1 & PIN_MSC);
led=0x1 & PIN_MSC;
*(unsigned int *)LED_BASE = led;
}
else if(i%500==250)
{
led=0x1 & PIN_MSC;
*(unsigned int *)LED_BASE = led;
}
if(PIN_MSC==0)
{
while(1);
}
/*
if(i%50==0)
{
*(unsigned int *)BEEP_BASE = 0;
}
else if(i%50==25)
{
*(unsigned int *)BEEP_BASE = 1;
}
*/
com=0;
data=e;
com=0x08;
for(j=0;j<3000;j++)
{
// IOWR_ALTERA_AVALON_TIMER_STATUS(TIMER_0_BASE, 1);
}
com=0;
data=f;
com=0x04;
for(j=0;j<3000;j++)
{
// IOWR_ALTERA_AVALON_TIMER_STATUS(TIMER_0_BASE, 1);
}
com=0;
data=c;
com=0x02;
for(j=0;j<3000;j++)
{
// IOWR_ALTERA_AVALON_TIMER_STATUS(TIMER_0_BASE, 1);
}
com=0;
data=d;
com=0x01;
for(j=0;j<3000;j++)
{
// IOWR_ALTERA_AVALON_TIMER_STATUS(TIMER_0_BASE, 1);
}
}
}
return 0;
}
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