timer0.c

DSP28335内部时钟中断跑马灯程序

#include "DSP2833x_Device.h"     // DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h"   // DSP2833x Examples Include File


#define	  LedReg	(*((volatile  Uint16 *)0x41FF))
Uint16    *ExRamStart = (Uint16 *)0x100000;
Uint16  LedCode[8]={0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFE};


interrupt void ISRTimer0(void);
Uint16 LedCount;

void main(void)
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.
   	InitSysCtrl();

// Step 2. Initalize GPIO:
// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();  // Skipped for this example
   	InitXintf16Gpio();	//zq

// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
   	DINT;

// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2833x_PieCtrl.c file.
   	InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
   	IER = 0x0000;
   	IFR = 0x0000;

// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.
   	InitPieVectTable();

// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
   	EALLOW;  // This is needed to write to EALLOW protected registers
   	PieVectTable.TINT0 = &ISRTimer0;
   //PieVectTable.XINT13 = &cpu_timer1_isr;
   //PieVectTable.TINT2 = &cpu_timer2_isr;
   	EDIS;    // This is needed to disable write to EALLOW protected registers

// Step 4. Initialize the Device Peripheral. This function can be
//         found in DSP2833x_CpuTimers.c
   	InitCpuTimers();   // For this example, only initialize the Cpu Timers


   	ConfigCpuTimer(&CpuTimer0, 150, 100000);
   //ConfigCpuTimer(&CpuTimer1, 150, 1000000);
   //ConfigCpuTimer(&CpuTimer2, 150, 1000000);

   	StartCpuTimer0();

// Enable CPU int1 which is connected to CPU-Timer 0, CPU int13
// which is connected to CPU-Timer 1, and CPU int 14, which is connected
// to CPU-Timer 2:
   	IER |= M_INT1;
   //IER |= M_INT13;
   //IER |= M_INT14;

// 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
	LedReg = 0xFF;
   	for(; ;)
   	{

   	}
}


interrupt void ISRTimer0(void)
{
    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;

	LedReg = LedCode[LedCount];
	LedCount++;
	if (LedCount>=8)	LedCount = 0;
}



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// No more.
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