TI中文支持网Part Number:TMS320F28335
配置如下： GPIO 8和9 也配置了PWMA PWMB功能， 实际测试PWMB输出占空比一直和A一样，是否配置有问题
#define PWM_DA_PRD (PWM_PERIOD*2 / 6) // 6K UP MODE need *2
#define PWM_DA_CH EPwm5Regs
volatile struct EPWM_REGS *EPwmRegs; WORD wPeriod = PWM_DA_PRD;
EPwmRegs = (struct EPWM_REGS *)((WORD *)&PWM_DA_CH.TBCTL.all);
EPwmRegs->TBPRD = PWM_DA_PRD; // DA 6k EPwmRegs->CMPA.half.CMPA = (float)PWM_DA_PRD* 0.2f;
EPwmRegs->CMPB = (float)PWM_DA_PRD * 0.6f;
EPwmRegs->TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwmRegs->TBCTR = 0x0000; // Clear counter
EPwmRegs->TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
EPwmRegs->TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwmRegs->TBCTL.bit.PRDLD = TB_SHADOW; EPwmRegs->TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE; #ifdef CLK_150MTBCLK
EPwmRegs->TBCTL.bit.HSPCLKDIV = TB_DIV1; // Clock ratio to SYSCLKOUT
EPwmRegs->TBCTL.bit.CLKDIV = TB_DIV1; #else
EPwmRegs->TBCTL.bit.HSPCLKDIV = TB_DIV2; // Clock ratio to SYSCLKOUT
EPwmRegs->TBCTL.bit.CLKDIV = TB_DIV1;
#endif EPwmRegs->CMPCTL.bit.SHDWAMODE = CC_SHADOW; // Load registers every ZERO
EPwmRegs->CMPCTL.bit.SHDWBMODE = CC_SHADOW;
EPwmRegs->CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
EPwmRegs->CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
// Setup compare
EPwmRegs->DBCTL.bit.OUT_MODE = DB_DISABLE;
EPwmRegs->AQCTLA.bit.ZRO = AQ_SET;
EPwmRegs->AQCTLA.bit.CAU = AQ_CLEAR; EPwmRegs->AQCTLB.bit.ZRO = AQ_SET;
EPwmRegs->AQCTLB.bit.CAU = AQ_CLEAR;
极端配置比较值然后看 GPIO 8 9 也是类似现象
Green Deng：
你好，工程师将在工作时间回复你的问题。
,
Green Deng：
你好，你的这段代码：
EPwmRegs->AQCTLA.bit.ZRO = AQ_SET;EPwmRegs->AQCTLA.bit.CAU = AQ_CLEAR;EPwmRegs->AQCTLB.bit.ZRO = AQ_SET;EPwmRegs->AQCTLB.bit.CAU = AQ_CLEAR;
这样设置的话就是会出现PWMA/B出现一样的输出。应该是你对AQ模块和CMPA/CMPB的使用还没有了解，建议你先看一下TRM的3.2.4.4 Waveforms for Common Configurations的说明，特别是后面几个图示例程。
