DSP

DSP_代码笔记（基于TMS320X281x）| CPU定时器0模块

2019-07-13 13:02发布

站内文章 / DSP
9653 0 1686
CPU定时器0模块初始化： #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 } 主函数模块： #include "DSP28_Device.h" void main() { InitSysCtrl(); DINT; IER = 0x0000; IFR = 0x0000; InitPieCtrl(); InitPieVectTable(); InitPeripherals(); InitGpio(); PieCtrl.PIEIER1.bit.INTx7 = 1; IER |= M_INT1; EINT; ERTM; ConfigCpuTimer(&CpuTimer0, 150, 1000000); StartCpuTimer0(); for(;;) { } } CPU定时器0周期中断函数： interrupt void TINT0_ISR(void) // CPU-Timer0中断函数 { CpuTimer0.InterruptCount++; if(CpuTimer0.InterruptCount==1) { GpioDataRegs.GPFCLEAR.bit.GPIOF14=1; //XF引脚低电平，D3亮 } if(CpuTimer0.InterruptCount==2) { GpioDataRegs.GPFSET.bit.GPIOF14=1; //XF引脚高电平，D3灭 CpuTimer0.InterruptCount=0; } CpuTimer0Regs.TCR.bit.TIF=1; //清除定时器中断标志位 PieCtrl.PIEACK.bit.ACK1=1; //响应同组其他中断 EINT; //开全局中断 }

热门文章