This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
本意是想配置两路PWM信号，其中PWM2与PWM1相位差180，但是按照如图所示的方式配置后，输出结果仍有几十ns的误差，不知是何原因
方便把代码通过 插入-->代码 的方式重新上传一下吗？
void Setup_ePWM1(void) { // EALLOW; // SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; // SysCtrlRegs.PCLKCR1.bit.EPWM1ENCLK = 1; // EDIS; EPwm1Regs.TBPRD = SP; // EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0 EPwm1Regs.TBCTR = 0x0000; // Clear counter // Setup TBCLK EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // EPwm1Regs.TBCTL.bit.PHSEN = TB_ENABLE; // EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; // EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; //� EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; //TBCLK = SYSCLKOUT / (HSPCLKDIV �� CLKDIV)=60M 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; // Setup compare EPwm1Regs.CMPA.half.CMPA = CMP1A; // // Set actions EPwm1Regs.AQCTLA.bit.CAU = AQ_SET; // Set PWM1A on CAU��TBCTR=CMPA EPwm1Regs.AQCTLA.bit.PRD = AQ_CLEAR; // Clear PWM1A on CAD,TBCTR=CMPA EPwm1Regs.AQCTLB.bit.CAU = AQ_SET; // Set PWM1B on CAU��TBCTR=CMPA EPwm1Regs.AQCTLB.bit.PRD = AQ_CLEAR; // Clear PWM1B on CAD,TBCTR=CMPA // Active Low PWMs - Setup Deadband EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;// EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC; // EPwm1Regs.DBCTL.bit.IN_MODE = DBA_RED_DBB_FED;//A EPwm1Regs.DBRED = DT; // EPwm1Regs.DBFED = DT; // Assumes ePWM1 clock is already enabled in InitSysCtrl(); // EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group EPwm1Regs.ETSEL.bit.SOCASEL = 4; // TBCTR = 0 EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event } void Setup_ePWM2(void) { // EALLOW; // SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; // SysCtrlRegs.PCLKCR1.bit.EPWM2ENCLK = 1; // EDIS; EPwm2Regs.TBPRD = SP; // EPwm2Regs.TBPHS.half.TBPHS = SP/2; // Phase is 0 // EPwm2Regs.TBPHS.half.TBPHS = 0; // Phase is 0 EPwm2Regs.TBCTR = 0x0000; // Clear counter // Setup TBCLK EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // EPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE; EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; // EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV1; // EPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW; // Load registers every ZERO EPwm2Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW; EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; EPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; // Setup compare EPwm2Regs.CMPA.half.CMPA = CMP1A; // // Set action EPwm2Regs.AQCTLA.bit.CAU = AQ_SET; // Set PWM2A on CAU EPwm2Regs.AQCTLA.bit.PRD = AQ_CLEAR; // Clear PWM2A on CAD EPwm2Regs.AQCTLB.bit.CAU = AQ_SET; // Set PWM2B on CAU EPwm2Regs.AQCTLB.bit.PRD = AQ_CLEAR; // Clear PWM2B on CAD // Active Low complementary PWMs - setup the deadband EPwm2Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;// EPwm2Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC; // EPwm2Regs.DBCTL.bit.IN_MODE = DBA_RED_DBB_FED;// EPwm2Regs.DBRED = DT; // EPwm2Regs.DBFED = DT; // // EALLOW; // SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; // Start all the timers synced // EDIS; }
示波器中不同颜色分别代表什么信号？
同步配置没有问题，我推测几十ns的间隙大概率是由DB延时引起的。可以先把DB关掉，确认配置好同步后再打开。
示波器不同颜色波形对应了两个模块输出的PWM信号，EPWM1A,EPWM2A，其中蓝色是移相180后的波形。
我会先试试关掉DB
好的，你先排查一下
