求大神解答
鄙人在使用CCS6编写28334的PWM程序时出现了下面的问题
EPwm1Regs.CMPA.half.CMPA
EPwm1Regs.CMPB
把这两个寄存器的值改成不同，但是输出的两路PWM波占空比却是一样的
附上配置代码：
void InitEPwm1 (void)
{
EPwm1Regs.TBPRD = Period; // Set timer period
EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwm1Regs.TBCTR = 0x0000; // Clear counter
// Setup TBCLK
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV5; // Clock ratio to SYSCLKOUT
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV5;
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 = 3000;
EPwm1Regs.CMPB = 6000;
// Set actions
EPwm1Regs.AQCTLA.bit.ZRO = AQ_SET; // Set PWM1A on Zero
EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;
EPwm1Regs.AQCTLB.bit.ZRO = AQ_SET; // Set PWM1B on Zero
EPwm1Regs.AQCTLB.bit.CAU = AQ_CLEAR;
}
请 帮忙看一下，谢谢！
