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(;;); } | 
楼主
标题置顶
标题高亮
