tms320f2812定时器程序

#include "DSP281x_Device.h" // DSP281x Headerfile Include File
#include "DSP281x_Examples.h" // DSP281x Examples Include File

// Prototype statements for functions found within this file.
interrupt void cpu_timer0_isr(void);

#define LEDS *(int *)0xc0000
#define CTRGR *(int *)0x108000
#define CTRLCDCMDR *(int *)0x108001
#define CTRKEY *(int *)0x108001
#define CTRLCDCR *(int *)0x108002
#define CTRCLKEY *(int *)0x108002
#define CTRLCDLCR *(int *)0x108003
#define CTRLCDRCR *(int *)0x108004
#define CTRLA *(int *)0x108005
#define CTRLR *(int *)0x108007

int i=0,nCount;
unsigned int uLBD;

void main(void)
{

unsigned int uPort8000;

InitSysCtrl();//初始化cpu

DINT;//关中断

InitPieCtrl();//初始化pie寄存器


IER = 0x0000;//禁止所有的中断
IFR = 0x0000;


InitPieVectTable();//初始化pie中断向量表


EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.TINT0 = &cpu_timer0_isr;//指定中断服务子程序
EDIS; // This is needed to disable write to EALLOW protected registers

CpuTimer0.RegsAddr = &CpuTimer0Regs;
// Initialize timer period to maximum:
CpuTimer0Regs.PRD.all = 0xffff;
// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):
CpuTimer0Regs.TPR.all = 0;
CpuTimer0Regs.TIM.all = 0;
CpuTimer0Regs.TPRH.all = 0;
// Make sure timer is stopped:
CpuTimer0Regs.TCR.bit.TSS = 1;
CpuTimer0Regs.TCR.bit.SOFT = 1;
CpuTimer0Regs.TCR.bit.FREE = 1;
// Reload all counter register with period value:
CpuTimer0Regs.TCR.bit.TRB = 1;
CpuTimer0Regs.TCR.bit.TIE = 1;
// Reset interrupt counters:
CpuTimer0.InterruptCount = 0;


StartCpuTimer0();//启动定时器0

// Enable CPU INT1 which is connected to CPU-Timer 0:
IER |= M_INT1;

// Enable TINT0 in the PIE: Group 1 interrupt 7
PieCtrlRegs.PIEIER1.bit.INTx7 = 1;

// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
CTRGR=0; // 初始化ICETEK-CTR
CTRGR=0x80;
CTRGR=0;
CTRLR=0; // 关闭东西方向的交通灯
CTRLR=0x40; // 关闭南北方向的交通灯
uPort8000=CTRCLKEY;

while ( 1 )
{

}

}


interrupt void cpu_timer0_isr(void)
{ int j,k;
//CpuTimer0.InterruptCount++;

// Acknowledge this interrupt to receive more interrupts from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
CpuTimer0Regs.TCR.bit.TIF = 1;
CpuTimer0Regs.TCR.bit.TRB = 1;
if ( nCount==0 )
{
LEDS=uLBD;
uLBD++; uLBD%=16;
}
nCount++; nCount%=194;

}


//===========================================================================
// No more.
//========================================

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