这里我配置的寄存器，但是仍然有相位差？还有什么地方需要配置么？
// Setup TBCLK
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.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;
EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;
// Setup TBCLK
EPwm2Regs.TBCTL.bit.CTRMODE =2; // Count up
EPwm2Regs.TBCTL.bit.PHSEN = 0; // Disable phase loading
EPwm2Regs.TBCTL.bit.PRDLD = 0;
EPwm2Regs.TBCTL.bit.HSPCLKDIV = 0; // Clock ratio to SYSCLKOUT
EPwm2Regs.TBCTL.bit.CLKDIV = 0;
EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;
// EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;
EPwm2Regs.TBCTL.bit.SWFSYNC = 1;
EPwm2Regs.TBCTL.bit.PRDLD = TB_SHADOW;
