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void EPWM1_Init(Uint16 tbprd) { EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; // Disable TBCLK within the ePWM SysCtrlRegs.PCLKCR1.bit.EPWM1ENCLK = 1; // ePWM1 EDIS;
// ePWM频率=TBCLK/(2*TBPRD)=150000000/(2*50000)
// 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.EPWM1_INT = &epwm1_timer_isr; EDIS; // This is needed to disable write to EALLOW protected registers
EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; // Stop all the TB clocks EDIS; InitEPwm1Gpio();
// Setup Sync EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN; // Pass through
// Allow each timer to be sync'ed EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE;// 失能关闭（如使能为将相依移位值装载到计数器）
EPwm1Regs.TBPHS.half.TBPHS = 0;
EPwm1Regs.TBPRD = tbprd; EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up EPwm1Regs.TBCTL.bit.HSPCLKDIV=TB_DIV1; EPwm1Regs.TBCTL.bit.CLKDIV=TB_DIV1; // ePWM频率=TBCLK/(2*TBPRD)=150000000/(2*50000) EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; // Select INT on Zero event EPwm1Regs.ETSEL.bit.INTEN = 1; // Enable INT EPwm1Regs.ETPS.bit.INTPRD = ET_1ST; // Generate INT on 1st event 在第一个事件中产生INT
EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; // Start all the timers synced 启动所有同步的定时器 EDIS;
// Enable CPU INT3 which is connected to EPWM1-6 INT: 启用与EPWM1-6 INT相连的CPU INT3。 IER |= M_INT3;
// Enable EPWM INTn in the PIE: Group 3 interrupt 1-6启用PIE中的EPWM INTn：第3组中断1-6 PieCtrlRegs.PIEIER3.bit.INTx1 = 1;
// Enable global Interrupts and higher priority real-time debug events: EINT; // Enable Global interrupt INTM ERTM; // Enable Global realtime interrupt DBGM } void EPWM2_Init(Uint16 tbprd) { EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; // Disable TBCLK within the ePWM SysCtrlRegs.PCLKCR1.bit.EPWM2ENCLK = 1; // ePWM2 EDIS;
EALLOW; // This is needed to write to EALLOW protected registers // PieVectTable.EPWM2_INT = &epwm2_timer_isr; EDIS; // This is needed to disable write to EALLOW protected registers
EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; // Stop all the TB clocks EDIS; InitEPwm2Gpio();
// Setup Sync EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN; // Pass through
EPwm1Regs.CMPA.half.CMPA =pwmval; // Clear INT flag for this timer EPwm1Regs.ETCLR.bit.INT = 1; // Acknowledge this interrupt to receive more interrupts from group 3 PieCtrlRegs.PIEACK.bit.ACK3 = 1; LED6_TOGGLE; AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1; //清楚排序器中断位 asm (" ESTOP0"); for(;;); }
