小白想实现定时器0中断实现led定时亮。运行后发现中断进不去。把TSS和TIE拉到watch发现它的值一直为0,赋1也没有效果。请大神解惑,什么原因呢。
#include "DSP28_Device.h"
struct CPUTIMER_VARS CpuTimer0; //对用户开放的CPU定时器只有CpuTimer0,CpuTimer1
struct CPUTIMER_VARS CpuTimer1; //和CpuTimer2被保留用作实习操作系统OS(例如DSP
struct CPUTIMER_VARS CpuTimer2; //BIOS)
//初始化CpuTimer0。
void InitCpuTimers(void)
{
CpuTimer0.RegsAddr = &CpuTimer0Regs; //使得CpuTimer0.RegsAddr 指向定时器寄存器
CpuTimer0Regs.PRD.all = 0xFFFFFFFF; //初始化CpuTimer0的周期寄存器
CpuTimer0Regs.TPR.all = 0; //初始化定时器预定标计数器
CpuTimer0Regs.TPRH.all = 0;
CpuTimer0Regs.TCR.bit.TSS = 1; //停止定时器
CpuTimer0Regs.TCR.bit.TRB = 1; //将周期寄存器PRD中的值装入计数器寄存器TIM中
CpuTimer0.InterruptCount = 0; //初始化定时器中断计数器
}
//Timer(指定的定时器),Freq,Period
void ConfigCpuTimer(struct CPUTIMER_VARS *Timer, float Freq, float Period)
{
Uint32 temp;
Timer->CPUFreqInMHz = Freq;
Timer->PeriodInUSec = Period;
temp = (long) (Freq * Period);
Timer->RegsAddr->PRD.all = temp; //给定时器周期寄存器赋值
Timer->RegsAddr->TPR.all = 0; //给定时器预定标寄存器赋值
Timer->RegsAddr->TPRH.all = 0;
// 初始化定时器控制寄存器:
Timer->RegsAddr->TCR.bit.TIF=1; //清除中断标志位
Timer->RegsAddr->TCR.bit.TSS = 1; //停止定时器
Timer->RegsAddr->TCR.bit.TRB = 1; //定时器重装,将定时器周期寄存器的值装入定时器计数器寄存器
Timer->RegsAddr->TCR.bit.SOFT = 1;
Timer->RegsAddr->TCR.bit.FREE = 1;
Timer->RegsAddr->TCR.bit.TIE = 1; //使能定时器中断
Timer->InterruptCount = 0; //初始化定时器中断计数器
}