DSP28335怎么实现错误联防的功能？

只看该作者 · 2016-10-24 20:38

求教啊，DSP28335怎么实现错误联防的功能？PWM正常输出，当TZ1低电平时强制PWM输出低

#include "DSP2833x_Device.h" // DSP2833xHeaderfile Include File

#include "DSP2833x_Examples.h" // DSP2833xExamples Include File

// Prototypestatements for functions found within this file.

interrupt void EPWM1_TZINT_ISR(void);

void InitEPwm1Example();

void main(void)

{

InitSysCtrl();

InitEPwm1Gpio();

EALLOW;

GpioCtrlRegs.GPAMUX1.bit.GPIO12=0x1;

EDIS;

DINT;

InitPieCtrl();

// Disable CPUinterrupts and clear all CPU interrupt flags:

IER = 0x0000;

IFR = 0x0000;

InitPieVectTable();

EALLOW; // This isneeded to write to EALLOW protected registers

PieVectTable.EPWM1_TZINT = &EPWM1_TZINT_ISR;//EPWM1_TZINT_ISR;

EDIS; // This isneeded to disable write to EALLOW protected registers

InitEPwm1Example();

// InitEPwm2Example();

IER|=M_INT2;

PieCtrlRegs.PIEIER2.bit.INTx1=1;

EINT; // EnableGlobal interrupt INTM

ERTM; // EnableGlobal realtime interrupt DBGM

// Step 6. IDLEloop. Just sit and loop forever (optional):

for(;;)

{

__asm(" NOP");

}

void InitEPwm1Example()

{

EPwm1Regs.TBPRD = 937.5; // Set timer period

EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0

EPwm1Regs.TBCTR = 0x0000; // Clear counter

EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count up

EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading

EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV4; // Clock ratio to SYSCLKOUT

EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV4;

EPwm1Regs.TBCTL.bit.SYNCOSEL=0x01;

EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW; // Load registers every ZERO

EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;

EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;

EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;

// Set actions

EPwm1Regs.AQCTLA.bit.ZRO = 0x2;//AQ_SET; // Set PWM1A on Zero

EPwm1Regs.AQCTLA.bit.PRD = 0x1;//AQ_CLEAR;

// Active Low PWMs - Setup Deadband

EPwm1Regs.DBCTL.bit.OUT_MODE = 0x3;//DB_FULL_ENABLE;

EPwm1Regs.DBCTL.bit.POLSEL = 0x2;//DB_ACTV_LO;

EPwm1Regs.DBCTL.bit.IN_MODE = 0x0;//DBA_ALL;

EPwm1Regs.DBRED = 30;//EPWM1_MIN_DB;

EPwm1Regs.DBFED = 30;//EPWM1_MIN_DB;

// EPwm1_DB_Direction = DB_UP;

EPwm1Regs.TZSEL.bit.OSHT1=1;

EPwm1Regs.TZEINT.bit.OST=1;

// Interrupt where we will change the Deadband

EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; // Select INT on Zero event

EPwm1Regs.ETSEL.bit.INTEN = 1; // Enable INT

EPwm1Regs.ETPS.bit.INTPRD = ET_3RD; // Generate INT on 3rd event

}

// Interruptroutines uses in this example:

interrupt void EPWM1_TZINT_ISR(void)

{

EPwm1Regs.TZCTL.bit.TZA=0x2;

EPwm1Regs.TZCTL.bit.TZB=0x2;

EPwm1Regs.ETCLR.bit.INT=1;

PieCtrlRegs.PIEACK.all=PIEACK_GROUP2;

EPwm1Regs.AQSFRC.all=0xc0;

EPwm1Regs.AQCSFRC.bit.CSFA=0x1;

EPwm1Regs.AQCSFRC.bit.CSFB=0x1;

asm (" ESTOP0");

for(;;);

}

DSP28335怎么实现错误联防的功能？

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