dsp28335 能够同时使能两路epwm中断么

当然可以使能，每个EPWM都要自己独立的中断向量，只要满足中断条件，相应的EPWM中断就会发生；

但是需要注意的是，中断有优先级，虽然可以同时使能两路中断，但是却不能同时执行两路中断，当两路中断同时发生时，优先级高的那个EPWM先进入中断处理，处理完之后才能处理另一个EPWM的中断。

中断服务程序，处理器处理“急件”，可理解为是一种服务，是通过执行事先编好的某个特定的程序来完成的，这种处理“急件”的程序被称为——中断服务程序。

_朊坷_/O设备相关的进程都有一个靠近内存底部的地址，称作中断向量。_ㄖ卸戏癯绦虻娜肟诘刂贰

当中央处理器正在处理内部数据时，外界发生了紧急情况，要求CPU暂停当前的工作转去处理这个紧急事件。处理完毕后，再回到原来被中断的地址，继续原来的工作，这样的过程称为中断。实现这一功能的部件称为中断系统，申请CPU中断的请求源称为中断源，单片机的中断系统一般允许多个中断源，当多个中断源同时向CPU请求中断时，就存在一个中断优先权的问题。通常根据中断源的优先级别，优先处理最紧急事件的中断请求源，即最先响应级别最高的中断请求。

这是 DSP28335的例程，程序目的是通过按不同的按键，通过中断改变LED的闪动方式

，你可以对比一下。 （DSP2812和 DSP28335是差不多的）

#include "DSP2833x_Deviceh" // DSP2833x Headerfile Include File#include "DSP2833x_Examplesh" // DSP2833x Examples Include File

#define LED1_ON GpioDataRegsGPASETbitGPIO0=1

#define LED1_OFF GpioDataRegsGPACLEARbitGPIO0=1

#define LED2_ON GpioDataRegsGPASETbitGPIO1=1

#define LED2_OFF GpioDataRegsGPACLEARbitGPIO1=1

#define LED3_ON GpioDataRegsGPASETbitGPIO2=1

#define LED3_OFF GpioDataRegsGPACLEARbitGPIO2=1

#define LED4_ON GpioDataRegsGPASETbitGPIO3=1

#define LED4_OFF GpioDataRegsGPACLEARbitGPIO3=1

#define LED5_ON GpioDataRegsGPASETbitGPIO4=1

#define LED5_OFF GpioDataRegsGPACLEARbitGPIO4=1

#define LED6_ON GpioDataRegsGPASETbitGPIO5=1

#define LED6_OFF GpioDataRegsGPACLEARbitGPIO5=1

#define LED7_ON GpioDataRegsGPBSETbitGPIO51=1

#define LED7_OFF GpioDataRegsGPBCLEARbitGPIO51=1

#define LED8_ON GpioDataRegsGPBSETbitGPIO50=1

#define LED8_OFF GpioDataRegsGPBCLEARbitGPIO50=1

interrupt void ISRExint3(void);

interrupt void ISRExint4(void);

interrupt void ISRExint5(void);

interrupt void ISRExint6(void);

void configtestled(void);

Uint16 sign ;

void main(void)

{

// Step 1 Initialize System Control:

// PLL, WatchDog, enable Peripheral Clocks

// This example function is found in the DSP2833x_SysCtrlc file

InitSysCtrl();

// Step 2 Initalize GPIO:

// This example function is found in the DSP2833x_Gpioc 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_PieCtrlc 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_DefaultIsrc

// This function is found in DSP2833x_PieVectc

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

PieVectTableXINT3 = &ISRExint3;

PieVectTableXINT4 = &ISRExint4;

PieVectTableXINT5 = &ISRExint5;

PieVectTableXINT6 = &ISRExint6;

EDIS; // This is needed to disable write to EALLOW protected registers

PieCtrlRegsPIECTRLbitENPIE = 1; // Enable the PIE block

PieCtrlRegsPIEIER12bitINTx1= 1;

PieCtrlRegsPIEIER12bitINTx2= 1;

PieCtrlRegsPIEIER12bitINTx3= 1;

PieCtrlRegsPIEIER12bitINTx4= 1;

IER |= M_INT12; // Enable CPU int1

EINT; // Enable Global interrupt INTM

ERTM; // Enable Global realtime interrupt DBGM

configtestled();

sign = 0;

while(1)

{

if(sign==0)

{ LED1_OFF;

LED2_OFF;

LED3_OFF;

LED4_OFF;

LED5_OFF;

LED6_OFF;

LED7_OFF;

LED8_OFF;

DELAY_US(50000);

LED1_ON;

DELAY_US(50000);

LED2_ON;

DELAY_US(50000);

LED3_ON;

DELAY_US(50000);

LED4_ON;

DELAY_US(50000);

LED5_ON;

DELAY_US(50000);

LED6_ON;

DELAY_US(50000);

LED7_ON;

DELAY_US(50000);

LED8_ON;

DELAY_US(50000); //NO XINT

}

if(sign==3)

{

LED1_OFF;

LED2_OFF;

LED3_OFF;

LED4_OFF;

LED5_OFF;

LED6_OFF;

LED7_OFF;

LED8_OFF;

DELAY_US(50000);

LED1_ON;

LED2_ON;

DELAY_US(50000);

LED3_ON;

LED4_ON;

DELAY_US(50000);

LED5_ON;

LED6_ON;

DELAY_US(50000);

LED7_ON;

LED8_ON;

DELAY_US(50000); // XINT3 COME

}

if(sign==4)

{ LED1_ON;

LED2_ON;

LED3_ON;

LED4_ON;

LED5_ON;

LED6_ON;

LED7_ON;

LED8_ON;

DELAY_US(50000);

LED1_OFF;

DELAY_US(50000);

LED2_OFF;

DELAY_US(50000);

LED3_OFF;

DELAY_US(50000);

LED4_OFF;

DELAY_US(50000);

LED5_OFF;

DELAY_US(50000);

LED6_OFF;

DELAY_US(50000);

LED7_OFF;

DELAY_US(50000);

LED8_OFF;

DELAY_US(50000); // XINT4 COME

}

if(sign==5)

{LED1_ON;

LED2_ON;

LED3_ON;

LED4_ON;

LED5_ON;

LED6_ON;

LED7_ON;

LED8_ON;

DELAY_US(50000);

LED1_OFF;

LED2_OFF;

DELAY_US(50000);

LED3_OFF;

LED4_OFF;

LED1_ON;

LED2_ON;

DELAY_US(50000);

LED5_OFF;

LED6_OFF;

LED3_ON;

LED4_ON;

DELAY_US(50000);

LED7_OFF;

LED8_OFF;

LED5_ON;

LED6_ON;

DELAY_US(50000); // XINT5 COME

}

if(sign==6)

{LED1_OFF;

LED2_ON;

LED3_OFF;

LED4_ON;

LED5_OFF;

LED6_ON;

LED7_OFF;

LED8_ON;

DELAY_US(50000);

LED1_ON;

LED2_OFF;

LED3_ON;

LED4_OFF;

LED5_ON;

LED6_OFF;

LED7_ON;

LED8_OFF;

DELAY_US(50000); // XINT5 COME

}

}

}

interrupt void ISRExint3(void)

{

PieCtrlRegsPIEACKall = PIEACK_GROUP12;

sign=3;

}

interrupt void ISRExint4(void)

{

PieCtrlRegsPIEACKall = PIEACK_GROUP12;

sign=4;

}

interrupt void ISRExint5(void)

{

PieCtrlRegsPIEACKall = PIEACK_GROUP12;

sign=5;

}

interrupt void ISRExint6(void)

{

PieCtrlRegsPIEACKall = PIEACK_GROUP12;

sign=6;

}

void configtestled(void)

{

EALLOW;

GpioCtrlRegsGPAMUX1bitGPIO0 = 0; // GPIO0 = GPIO0

GpioCtrlRegsGPADIRbitGPIO0 = 1;

GpioCtrlRegsGPAMUX1bitGPIO1 = 0; // GPIO1 = GPIO1

GpioCtrlRegsGPADIRbitGPIO1 = 1;

GpioCtrlRegsGPAMUX1bitGPIO2 = 0; // GPIO2 = GPIO2

GpioCtrlRegsGPADIRbitGPIO2 = 1;

GpioCtrlRegsGPAMUX1bitGPIO3 = 0; // GPIO3 = GPIO3

GpioCtrlRegsGPADIRbitGPIO3 = 1;

GpioCtrlRegsGPAMUX1bitGPIO4 = 0; // GPIO4 = GPIO4

GpioCtrlRegsGPADIRbitGPIO4 = 1;

GpioCtrlRegsGPAMUX1bitGPIO5 = 0; // GPIO5 = GPIO5

GpioCtrlRegsGPADIRbitGPIO5 = 1;

GpioCtrlRegsGPBMUX2bitGPIO51 = 0; // GPIO51 = GPIO51

GpioCtrlRegsGPBDIRbitGPIO51 = 1;

GpioCtrlRegsGPBPUDbitGPIO51=0;

GpioCtrlRegsGPBMUX2bitGPIO50 = 0; // GPIO50 = GPIO50

GpioCtrlRegsGPBDIRbitGPIO50 = 1;

GpioCtrlRegsGPBPUDbitGPIO50=0;

EDIS;

}

//===========================================================================

// No more

//===========================================================================

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