凌阳16位单片机之IRQ6中断

实现功能：利用IRQ6的两个时基中断，即IRQ6_TMB1和IRQ6_TMB2中断，在各自的中断服务程序中对相应的变量进行累加；并通过点亮、熄灭发光二极管来表示相应变量计数器累加的速度。

实验现象：D4~D7四个发光二极管状态变化周期为4s，D8~D11四个发光二极管状态变化周期为2s

#include "SPCE061A.H"
#define sec1 0x00f0
#define sec2 0x000f
unsigned int i,Output,tim1=0,tim2=0;
void IRQ6(void)__attribute__((ISR));
void IRQ6()
{
if(*P_INT_Ctrl & C_IRQ6_TMB1)
{
tim1++;
if(tim1 >= 64*2)
{
tim1=0;
if((*P_IOA_Data & sec1) == 0)
{
*P_IOA_Data += sec1;
}
else
{
*P_IOA_Data-=sec1;
}
}
*P_INT_Clear = C_IRQ6_TMB1;
}
if(*P_INT_Ctrl & C_IRQ6_TMB2)
{
tim2++;
if(tim2 >= 64*2)
{
tim2=0;
if(!(*P_IOA_Data &sec2))
{
*P_IOA_Data += sec2;
}
else
{
*P_IOA_Data-=sec2;
}
}
*P_INT_Clear = C_IRQ6_TMB2;
}

}

int main()
{
__asm("FIQ OFF");
*P_IOA_Dir = 0x00ff;
*P_IOA_Attrib = 0x00ff;
*P_IOA_Data = 0x0000;

*P_Timebase_Setup = (C_TMB1_64Hz+C_TMB2_128Hz);
*P_INT_Ctrl = C_IRQ6_TMB1+C_IRQ6_TMB2; //Tim1是64Hz Tim2是128Hz
__asm("INT IRQ");
while(1)
{
*P_Watchdog_Clear = 0x0001;
}

}