HC32F460 如何动态调节PWM占空比
我正在使用HC32F460 ,但是在示列程序中修改输出占空比，但是没有效果stc_timer4_cnt_init_t stcCntInit;
stc_timer4_oco_init_t stcOcoInit;
stc_timer4_pwm_init_t stcPwmInit;
stc_oco_low_ch_compare_mode_t stcLowChCmpMode;
stc_oco_high_ch_compare_mode_t stcHighChCmpMode;
uint16_t u8OcoOccrVal = TIMER4_CNT_CYCLE_VAL/2u;
en_timer4_oco_ch_t enOcoLowCh = (en_timer4_oco_ch_t)(TIMER4_OCO_HIGH_CH + 1);
/* Clear structures */
MEM_ZERO_STRUCT(stcCntInit);
MEM_ZERO_STRUCT(stcOcoInit);
MEM_ZERO_STRUCT(stcLowChCmpMode);
MEM_ZERO_STRUCT(stcHighChCmpMode);
MEM_ZERO_STRUCT(stcPwmInit);
/* Enable peripheral clock */
PWC_Fcg2PeriphClockCmd(PWC_FCG2_PERIPH_TIM41 | PWC_FCG2_PERIPH_TIM42 | PWC_FCG2_PERIPH_TIM43, Enable);
/* Timer4 CNT : Initialize CNT configuration structure */
stcCntInit.enBufferCmd = Enable;//Disable;
stcCntInit.enClk = Timer4CntPclk;
stcCntInit.enClkDiv = Timer4CntPclkDiv16;/* CNT clock divide */
stcCntInit.u16Cycle = TIMER4_CNT_CYCLE_VAL;
stcCntInit.enCntMode = Timer4CntSawtoothWave;
stcCntInit.enZeroIntCmd = Disable;
stcCntInit.enPeakIntCmd = Disable;
stcCntInit.enZeroIntMsk = Timer4CntIntMask0;
stcCntInit.enPeakIntMsk = Timer4CntIntMask0;
TIMER4_CNT_Init(TIMER4_UNIT, &stcCntInit); /* Initialize CNT */
/* Timer4 OCO : Initialize OCO configuration structure */
stcOcoInit.enOccrBufMode = OccrBufTrsfByCntZeroOrCntPeak;//OccrBufDisable;
stcOcoInit.enOcmrBufMode = OcmrBufTrsfByCntZeroOrCntPeak;//OcmrBufDisable;
stcOcoInit.enPortLevel = OcPortLevelLow;
stcOcoInit.enOcoIntCmd = Disable;
TIMER4_OCO_Init(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, &stcOcoInit); /* Initialize OCO high channel */
TIMER4_OCO_Init(TIMER4_UNIT, enOcoLowCh, &stcOcoInit); /* Initialize OCO low channel */
if (!(TIMER4_OCO_HIGH_CH % 2))
{
/* ocmr = 0x0FFF */
stcHighChCmpMode.enCntZeroMatchOpState = OcoOpOutputReverse;
stcHighChCmpMode.enCntZeroNotMatchOpState = OcoOpOutputHold;
stcHighChCmpMode.enCntUpCntMatchOpState = OcoOpOutputReverse;
stcHighChCmpMode.enCntPeakMatchOpState = OcoOpOutputReverse;
stcHighChCmpMode.enCntPeakNotMatchOpState = OcoOpOutputHold;
stcHighChCmpMode.enCntDownCntMatchOpState = OcoOpOutputReverse;
stcHighChCmpMode.enCntZeroMatchOcfState = OcoOcfSet;
stcHighChCmpMode.enCntUpCntMatchOcfState = OcoOcfSet;
stcHighChCmpMode.enCntPeakMatchOcfState = OcoOcfSet;
stcHighChCmpMode.enCntDownCntMatchOcfState = OcoOcfSet;
stcHighChCmpMode.enMatchConditionExtendCmd = Disable;
TIMER4_OCO_SetHighChCompareMode(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, &stcHighChCmpMode);/* Set OCO high channel compare mode */
}
/*************Timer4 OCO ocmr1 = 0x0FF0 0FFF*****************************/
if (enOcoLowCh % 2)
{
/* OCMR Ox 0FF0 0FFF 0000 1111 1111 0000 0000 1111 1111 1111 */
stcLowChCmpMode.enCntZeroLowMatchHighMatchLowChOpState = OcoOpOutputReverse; /* bit11 */
stcLowChCmpMode.enCntZeroLowMatchHighNotMatchLowChOpState = OcoOpOutputReverse; /* bit11 */
stcLowChCmpMode.enCntZeroLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit00 */
stcLowChCmpMode.enCntZeroLowNotMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit00 */
stcLowChCmpMode.enCntUpCntLowMatchHighMatchLowChOpState = OcoOpOutputReverse; /* bit11 */
stcLowChCmpMode.enCntUpCntLowMatchHighNotMatchLowChOpState = OcoOpOutputReverse; /* bit 11 */
stcLowChCmpMode.enCntUpCntLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit00 */
stcLowChCmpMode.enCntPeakLowMatchHighMatchLowChOpState = OcoOpOutputReverse; /* bit11 */
stcLowChCmpMode.enCntPeakLowMatchHighNotMatchLowChOpState = OcoOpOutputReverse; /* bit 11 */
stcLowChCmpMode.enCntPeakLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit00 */
stcLowChCmpMode.enCntPeakLowNotMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit00 */
stcLowChCmpMode.enCntDownLowMatchHighMatchLowChOpState = OcoOpOutputReverse; /* bit11 */
stcLowChCmpMode.enCntDownLowMatchHighNotMatchLowChOpState = OcoOpOutputReverse; /* bit 11 */
stcLowChCmpMode.enCntDownLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit00 */
stcLowChCmpMode.enCntZeroMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntUpCntMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntPeakMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntDownCntMatchOcfState = OcoOcfSet; /* bit 1 */
TIMER4_OCO_SetLowChCompareMode(TIMER4_UNIT, enOcoLowCh, &stcLowChCmpMode);/* Set OCO low channel compare mode */
}
/* Set OCO compare value */
TIMER4_OCO_WriteOccr(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, u8OcoOccrVal/2);
TIMER4_OCO_WriteOccr(TIMER4_UNIT, enOcoLowCh, u8OcoOccrVal);
/* Enable OCO */
TIMER4_OCO_OutputCompareCmd(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, Enable);
TIMER4_OCO_OutputCompareCmd(TIMER4_UNIT, enOcoLowCh, Enable);
/* Initialize PWM I/O */
PORT_SetFunc(TIMER4_PWM_H_PORT, TIMER4_PWM_H_PIN, Func_Tim4, Disable);
PORT_SetFunc(TIMER4_PWM_L_PORT, TIMER4_PWM_L_PIN, Func_Tim4, Disable);
/* Timer4 PWM: Initialize PWM configuration structure */
stcPwmInit.enRtIntMaskCmd = Enable;
stcPwmInit.enClkDiv = PwmPlckDiv1;
stcPwmInit.enOutputState = PwmHHoldPwmLReverse;
stcPwmInit.enMode = PwmThroughMode;
TIMER4_PWM_Init(TIMER4_UNIT, TIMER4_PWM_CH, &stcPwmInit); /* Initialize timer4 pwm */
/* Clear && Start CNT */
TIMER4_CNT_ClearCountVal(TIMER4_UNIT);
TIMER4_CNT_Start(TIMER4_UNIT);
TIMER4_OCO_WriteOccr(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, u8OcoOccrVal/2);
TIMER4_OCO_WriteOccr(TIMER4_UNIT, enOcoLowCh, u8OcoOccrVal/2);
TIMER4_OCO_WriteOccr(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, u8OcoOccrVal/4);
TIMER4_OCO_WriteOccr(TIMER4_UNIT, enOcoLowCh, u8OcoOccrVal/4); Timer4改变不了占空比，用timera就可以，你这里设置的只是相位的偏移，不是占空比的改变。
/* Set OCO compare value */
TIMER4_OCO_WriteOccr(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, u8OcoOccrVal/2);
TIMER4_OCO_WriteOccr(TIMER4_UNIT, enOcoLowCh, u8OcoOccrVal); hh电子爱好者 发表于 2022-1-24 16:24
Timer4改变不了占空比，用timera就可以，你这里设置的只是相位的偏移，不是占空比的改变。
/* Set OCO co ...
谁说timer4改变不了占空比的，这个本来就是给电机控制用的，当然，普通PWM的控制也可以。 本帖最后由 martinhu 于 2022-1-25 17:58 编辑
这个是锯齿波的OCMR的调制，仅供参考，楼主如果要用，估计得添加修改很多地方
/**
*******************************************************************************
** \briefMain function of project
**
** \paramNone
**
** \retval int32_t return value, if needed
**
******************************************************************************/
int32_t main(void)
{
stc_timer4_cnt_init_t stcCntInit;
stc_timer4_oco_init_t stcOcoInit;
stc_timer4_pwm_init_t stcPwmInit;
stc_irq_regi_conf_t stcIrqRegiCfg;
stc_oco_low_ch_compare_mode_t stcLowChCmpMode;
stc_oco_high_ch_compare_mode_t stcHighChCmpMode;
uint16_t u8OcoOccrVal = TIMER4_CNT_CYCLE_VAL/2u;
en_timer4_oco_ch_t enOcoLowCh = (en_timer4_oco_ch_t)(TIMER4_OCO_HIGH_CH + 1);
/* Clear structures */
MEM_ZERO_STRUCT(stcCntInit);
MEM_ZERO_STRUCT(stcOcoInit);
MEM_ZERO_STRUCT(stcLowChCmpMode);
MEM_ZERO_STRUCT(stcHighChCmpMode);
MEM_ZERO_STRUCT(stcPwmInit);
MEM_ZERO_STRUCT(stcIrqRegiCfg);
BSP_CLK_Init();
/* Initialize LED */
BSP_LED_Init();
M4_DBGC->MCUSTPCTL_f.TMR41STP = 1;
/* Initialize PWM I/O */
PORT_SetFunc(TIMER4_PWM_H_PORT, TIMER4_PWM_H_PIN, Func_Tim4, Disable);
PORT_SetFunc(TIMER4_PWM_L_PORT, TIMER4_PWM_L_PIN, Func_Tim4, Disable);
M4_PORT->PORRB_f.POR05 = 1;
M4_PORT->POERB_f.POUTE05 = 1;
/* Enable peripheral clock */
PWC_Fcg2PeriphClockCmd(PWC_FCG2_PERIPH_TIM41 | PWC_FCG2_PERIPH_TIM42 | PWC_FCG2_PERIPH_TIM43, Enable);
/* Timer4 CNT : Initialize CNT configuration structure */
stcCntInit.enBufferCmd = Enable;//Disable;
stcCntInit.enClk = Timer4CntPclk;
stcCntInit.enClkDiv = Timer4CntPclkDiv16;/* CNT clock divide */
stcCntInit.u16Cycle = TIMER4_CNT_CYCLE_VAL;
stcCntInit.enCntMode = Timer4CntSawtoothWave;
stcCntInit.enZeroIntCmd = Enable;//Disable;
stcCntInit.enPeakIntCmd = Disable;
stcCntInit.enZeroIntMsk = Timer4CntIntMask0;//Timer4CntIntMask15;//
stcCntInit.enPeakIntMsk = Timer4CntIntMask0;
TIMER4_CNT_Init(TIMER4_UNIT, &stcCntInit); /* Initialize CNT */
/* Timer4 OCO : Initialize OCO configuration structure */
stcOcoInit.enOccrBufMode = OccrBufTrsfByCntZeroZicZero;//OccrBufDisable;
stcOcoInit.enOcmrBufMode = OcmrBufDisable;
stcOcoInit.enPortLevel = OcPortLevelLow;
stcOcoInit.enOcoIntCmd = Disable;
TIMER4_OCO_Init(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, &stcOcoInit); /* Initialize OCO high channel */
TIMER4_OCO_Init(TIMER4_UNIT, enOcoLowCh, &stcOcoInit); /* Initialize OCO low channel */
if (!(TIMER4_OCO_HIGH_CH % 2))
{
/* ocmr = 0x4A4F */
stcHighChCmpMode.enCntUpCntMatchOpState = OcoOpOutputLow; //bit //向上计数&匹配
stcHighChCmpMode.enCntPeakNotMatchOpState = OcoOpOutputHold; //bit//上溢&不匹配
stcHighChCmpMode.enCntPeakMatchOpState = OcoOpOutputHigh; //OcoOpOutputLow;// //bit //上溢&匹配
stcHighChCmpMode.enCntDownCntMatchOpState = OcoOpOutputHold; //bit //向下计数&匹配
stcHighChCmpMode.enCntZeroNotMatchOpState = OcoOpOutputHigh; //bit//下溢&不匹配
stcHighChCmpMode.enCntZeroMatchOpState = OcoOpOutputLow; //bit//下溢&匹配
stcHighChCmpMode.enCntZeroMatchOcfState = OcoOcfSet; //bit
stcHighChCmpMode.enCntUpCntMatchOcfState = OcoOcfSet; //bit
stcHighChCmpMode.enCntPeakMatchOcfState = OcoOcfSet; //bit
stcHighChCmpMode.enCntDownCntMatchOcfState = OcoOcfSet; //bit
stcHighChCmpMode.enMatchConditionExtendCmd = Disable;
TIMER4_OCO_SetHighChCompareMode(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, &stcHighChCmpMode);/* Set OCO high channel compare mode */
}
#if 0
/*************Timer4 OCO ocmr1 = 0x4A40 4A4F Only control by OCMERnL*****************************/
if (enOcoLowCh % 2)
{
/* OCMR Ox 0FF0 0FFF 0000 1111 1111 0000 0000 1111 1111 1111 */
stcLowChCmpMode.enCntZeroLowNotMatchHighMatchLowChOpState = OcoOpOutputHigh; /* bit */ //计数下溢 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntZeroLowMatchHighMatchLowChOpState = OcoOpOutputLow; /* bit */ //计数器下溢 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntZeroLowNotMatchHighNotMatchLowChOpState = OcoOpOutputHigh; /* bit */ //计数器下溢 & OCCRnL不匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntZeroLowMatchHighNotMatchLowChOpState = OcoOpOutputLow; /* bit */ //计数器下溢 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntUpCntLowMatchHighMatchLowChOpState = OcoOpOutputLow; /* bit */ //向上计数 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntUpCntLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //向上计数 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntUpCntLowMatchHighNotMatchLowChOpState = OcoOpOutputLow; /* bit */ //向上计数 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntPeakLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //计数器上溢 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntPeakLowMatchHighMatchLowChOpState = OcoOpOutputHigh; /* bit */ //计数器上溢 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntPeakLowNotMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit */ //计数器上溢 & OCCRnL不匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntPeakLowMatchHighNotMatchLowChOpState = OcoOpOutputHigh; /* bit */ //计数器上溢 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntDownLowMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //向下计数 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntDownLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //向下计数 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntDownLowMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit */ //向下计数 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntZeroMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntUpCntMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntPeakMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntDownCntMatchOcfState = OcoOcfSet; /* bit 1 */
TIMER4_OCO_SetLowChCompareMode(TIMER4_UNIT, enOcoLowCh, &stcLowChCmpMode);/* Set OCO low channel compare mode */
}
#else
/*************Timer4 OCO ocmr1 = 0x4484 028F Control by OCMERnL and OCMERnH*********************/
if (enOcoLowCh % 2)
{
/* OCMR Ox 0FF0 0FFF 0000 1111 1111 0000 0000 1111 1111 1111 */
stcLowChCmpMode.enCntZeroLowNotMatchHighMatchLowChOpState = OcoOpOutputHigh; /* bit */ //计数下溢 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntZeroLowMatchHighMatchLowChOpState = OcoOpOutputHigh; /* bit */ //计数器下溢 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntZeroLowNotMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit */ //计数器下溢 & OCCRnL不匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntZeroLowMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit */ //计数器下溢 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntUpCntLowMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //向上计数 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntUpCntLowNotMatchHighMatchLowChOpState = OcoOpOutputHigh; /* bit */ //向上计数 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntUpCntLowMatchHighNotMatchLowChOpState = OcoOpOutputLow; /* bit */ //向上计数 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntPeakLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //计数器上溢 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntPeakLowMatchHighMatchLowChOpState = OcoOpOutputLow; /* bit */ //计数器上溢 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntPeakLowNotMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit */ //计数器上溢 & OCCRnL不匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntPeakLowMatchHighNotMatchLowChOpState = OcoOpOutputLow; /* bit */ //计数器上溢 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntDownLowMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //向下计数 & OCCRnL匹配 & OCCRnH匹配
stcLowChCmpMode.enCntDownLowNotMatchHighMatchLowChOpState = OcoOpOutputHold; /* bit */ //向下计数 & OCCRnL不匹配 & OCCRnH匹配
stcLowChCmpMode.enCntDownLowMatchHighNotMatchLowChOpState = OcoOpOutputHold; /* bit */ //向下计数 & OCCRnL匹配 & OCCRnH不匹配
stcLowChCmpMode.enCntZeroMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntUpCntMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntPeakMatchOcfState = OcoOcfSet; /* bit 1 */
stcLowChCmpMode.enCntDownCntMatchOcfState = OcoOcfSet; /* bit 1 */
TIMER4_OCO_SetLowChCompareMode(TIMER4_UNIT, enOcoLowCh, &stcLowChCmpMode);/* Set OCO low channel compare mode */
}
#endif
/* Set OCO compare value */
TIMER4_OCO_WriteOccr(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, u8OcoOccrVal);
TIMER4_OCO_WriteOccr(TIMER4_UNIT, enOcoLowCh, u8OcoOccrVal);
// M4_TMR41->OCSRU_f.OCPH = 1;
// M4_TMR41->OCSRU_f.OCPL = 1;
//M4_TMR41->OCERU_f.MCECH = 1;
/* Enable OCO */
TIMER4_OCO_OutputCompareCmd(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, Enable);
TIMER4_OCO_OutputCompareCmd(TIMER4_UNIT, enOcoLowCh, Enable);
/* Timer4 PWM: Initialize PWM configuration structure */
stcPwmInit.enRtIntMaskCmd = Disable;//Enable;
stcPwmInit.enClkDiv = PwmPlckDiv1;
stcPwmInit.enOutputState = PwmHPwmLHold;
stcPwmInit.enMode = PwmThroughMode;
TIMER4_PWM_Init(TIMER4_UNIT, TIMER4_PWM_CH, &stcPwmInit); /* Initialize timer4 pwm */
// TIMER4_OCO_IrqCmd(TIMER4_UNIT, TIMER4_OCO_HIGH_CH, Enable);
// /* Set Timer4-CNT IRQ */
// stcIrqRegiCfg.enIRQn = Int000_IRQn;
// stcIrqRegiCfg.pfnCallback = &CmpUhMatchIrqCb;
// stcIrqRegiCfg.enIntSrc = INT_TMR41_GCMUH;
// enIrqRegistration(&stcIrqRegiCfg);
// NVIC_SetPriority(stcIrqRegiCfg.enIRQn, DDL_IRQ_PRIORITY_DEFAULT);
// NVIC_ClearPendingIRQ(stcIrqRegiCfg.enIRQn);
// NVIC_EnableIRQ(stcIrqRegiCfg.enIRQn);
/* Set Timer4-CNT IRQ */
stcIrqRegiCfg.enIRQn = Int001_IRQn;
stcIrqRegiCfg.pfnCallback = &CmpZeroMatchIrqCb;
stcIrqRegiCfg.enIntSrc = INT_TMR41_GUDF;
enIrqRegistration(&stcIrqRegiCfg);
NVIC_SetPriority(stcIrqRegiCfg.enIRQn, DDL_IRQ_PRIORITY_DEFAULT);
NVIC_ClearPendingIRQ(stcIrqRegiCfg.enIRQn);
NVIC_EnableIRQ(stcIrqRegiCfg.enIRQn);
M4_PORT->POSRB_f.POS05 = 1;
/* Clear && Start CNT */
TIMER4_CNT_ClearCountVal(TIMER4_UNIT);
TIMER4_CNT_Start(TIMER4_UNIT);
直接修改输出占空比不就好了？ 这个没有用过，应该跟stm32一样的，能修改。 HC32F460还有这个bug吗 把代码重新初始化呢？ 直接修改寄存器不行吗 是初始化的就有问题吗？ 可以动态修正吧，尝试关闭定时器，修改，再打开呢 这个是在哪个过程中出现的问题了 我一般是通过反馈量来改占空比的，
pwm就是脉宽调制，你能输出波形，就能改占空比
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