Merge pull request #14379 from OpenNuvoton/nvt_high_res_pwm

Nuvoton: Enlarge NuMaker PWM duty cycle range
ARMmbed · Mar 11, 2021 · 3061725 · 3061725
2 parents dd7ca06 + 5b693ff
commit 3061725
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Showing 18 changed files with 45 additions and 45 deletions.
diff --git a/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/inc/m251_pwm.h b/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/inc/m251_pwm.h
@@ -475,7 +475,7 @@ uint32_t PWM_ConfigOutputChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u3
 uint32_t PWM_ConfigOutputChannel2(PWM_T *epwm,
                                   uint32_t u32ChannelNum,
                                   uint32_t u32Frequency,
-                                  uint32_t u32DutyCycle,
+                                  uint32_t u32HighDutyCycle,
                                   uint32_t u32Frequency2);
 void PWM_Start(PWM_T *pwm, uint32_t u32ChannelMask);
 void PWM_Stop(PWM_T *pwm, uint32_t u32ChannelMask);

diff --git a/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/src/m251_pwm.c b/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/src/m251_pwm.c
@@ -145,7 +145,7 @@ uint32_t PWM_ConfigCaptureChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u
  */
 uint32_t PWM_ConfigOutputChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32DutyCycle)
 {
-    return PWM_ConfigOutputChannel2(pwm, u32ChannelNum, u32Frequency, u32DutyCycle, 1);
+    return PWM_ConfigOutputChannel2(pwm, u32ChannelNum, u32Frequency, u32DutyCycle*100, 1);
 }
 
 /**
@@ -155,13 +155,13 @@ uint32_t PWM_ConfigOutputChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u3
  *                - PWM1 : PWM Group 1
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency = u32Frequency / u32Frequency2
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32HighDutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure PWM frequency may affect
  *       existing frequency of other channel.
  */
-uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32DutyCycle, uint32_t u32Frequency2)
+uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32HighDutyCycle, uint32_t u32Frequency2)
 {
     uint32_t u32Src;
     uint32_t u32PWMClockSrc;
@@ -219,12 +219,12 @@ uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u
     u16CNR -= 1UL;
     PWM_SET_CNR(pwm, u32ChannelNum, u16CNR);
 
-    if (u32DutyCycle)
+    if (u32HighDutyCycle)
     {
-        if (u32DutyCycle >= 100UL)
+        if (u32HighDutyCycle >= 10000UL)
             PWM_SET_CMR(pwm, u32ChannelNum, u16CNR);
         else
-            PWM_SET_CMR(pwm, u32ChannelNum, u32DutyCycle * (u16CNR + 1UL) / 100UL);
+            PWM_SET_CMR(pwm, u32ChannelNum, u32HighDutyCycle * (u16CNR + 1UL) / 10000UL);
 
         (pwm)->WGCTL0 &= ~((PWM_WGCTL0_PRDPCTL0_Msk | PWM_WGCTL0_ZPCTL0_Msk) << (u32ChannelNum << 1UL));
         (pwm)->WGCTL0 |= (PWM_OUTPUT_LOW << ((u32ChannelNum << 1UL) + PWM_WGCTL0_PRDPCTL0_Pos));

diff --git a/targets/TARGET_NUVOTON/TARGET_M251/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_M251/pwmout_api.c
@@ -195,10 +195,10 @@ static void pwmout_config(pwmout_t *obj, int start)
 
     // NOTE: Support period < 1s
     // NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
-    //       1. Inverse duty cycle (100 - duty)
+    //       1. Inverse duty cycle (10000 - duty)
     //       2. Inverse PWM output polarity
     //       This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 10000 - obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
     pwm_base->POLCTL |= 1 << (PWM_POLCTL_PINV0_Pos + chn);
 
     if (start) {

diff --git a/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.c b/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.c
@@ -126,7 +126,7 @@ uint32_t EPWM_ConfigCaptureChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_
  */
 uint32_t EPWM_ConfigOutputChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32DutyCycle)
 {
-    return EPWM_ConfigOutputChannel2(epwm, u32ChannelNum, u32Frequency, u32DutyCycle, 1);
+    return EPWM_ConfigOutputChannel2(epwm, u32ChannelNum, u32Frequency, u32DutyCycle*100, 1);
 }
 
 /**
@@ -136,15 +136,15 @@ uint32_t EPWM_ConfigOutputChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t
  *                - EPWM1 : EPWM Group 1
  * @param[in] u32ChannelNum EPWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32HighDutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure EPWM frequency may affect
  *       existing frequency of other channel.
  * @note This function is used for initial stage.
  *       To change duty cycle later, it should get the configured period value and calculate the new comparator value.
  */
-uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32DutyCycle, uint32_t u32Frequency2)
+uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32HighDutyCycle, uint32_t u32Frequency2)
 {
     uint32_t u32PWMClockSrc;
     uint32_t i;
@@ -183,7 +183,7 @@ uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_
 
     u32CNR = u32CNR - 1U;
     EPWM_SET_CNR(epwm, u32ChannelNum, u32CNR);
-    EPWM_SET_CMR(epwm, u32ChannelNum, u32DutyCycle * (u32CNR + 1UL) / 100UL);
+    EPWM_SET_CMR(epwm, u32ChannelNum, u32HighDutyCycle * (u32CNR + 1UL) / 10000UL);
 
     (epwm)->WGCTL0 = ((epwm)->WGCTL0 & ~((EPWM_WGCTL0_PRDPCTL0_Msk | EPWM_WGCTL0_ZPCTL0_Msk) << (u32ChannelNum << 1))) | \
                      (EPWM_OUTPUT_HIGH << (u32ChannelNum << 1UL << EPWM_WGCTL0_ZPCTL0_Pos));

diff --git a/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.h b/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.h
@@ -566,7 +566,7 @@ uint32_t EPWM_ConfigOutputChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t
 uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm,
                                   uint32_t u32ChannelNum,
                                   uint32_t u32Frequency,
-                                  uint32_t u32DutyCycle,
+                                  uint32_t u32HighDutyCycle,
                                   uint32_t u32Frequency2);
 void EPWM_Start(EPWM_T *epwm, uint32_t u32ChannelMask);
 void EPWM_Stop(EPWM_T *epwm, uint32_t u32ChannelMask);

diff --git a/targets/TARGET_NUVOTON/TARGET_M261/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_M261/pwmout_api.c
@@ -195,10 +195,10 @@ static void pwmout_config(pwmout_t *obj, int start)
 
     // NOTE: Support period < 1s
     // NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
-    //       1. Inverse duty cycle (100 - duty)
+    //       1. Inverse duty cycle (10000 - duty)
     //       2. Inverse PWM output polarity
     //       This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
-    EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 10000 - obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
     pwm_base->POLCTL |= 1 << (EPWM_POLCTL_PINV0_Pos + chn);
 
     if (start) {

diff --git a/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.c b/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.c
@@ -107,15 +107,15 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
                                   uint32_t u32Frequency,
                                   uint32_t u32DutyCycle)
 {
-    return PWM_ConfigOutputChannel2(pwm, u32ChannelNum, u32Frequency, u32DutyCycle, 1);
+    return PWM_ConfigOutputChannel2(pwm, u32ChannelNum, u32Frequency, u32DutyCycle*100, 1);
 }
 
 /**
  * @brief This function config PWM generator and get the nearest frequency in edge aligned auto-reload mode
  * @param[in] pwm The base address of PWM module
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency = u32Frequency / u32Frequency2
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32HighDutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
@@ -124,7 +124,7 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
 uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm,
                                  uint32_t u32ChannelNum,
                                  uint32_t u32Frequency,
-                                 uint32_t u32DutyCycle,
+                                 uint32_t u32HighDutyCycle,
                                  uint32_t u32Frequency2)
 {
     uint32_t u32Src;
@@ -176,9 +176,9 @@ uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm,
     (pwm)->CTL1 &= ~(PWM_CTL1_CNTMODE0_Msk << u32ChannelNum);
 
     PWM_SET_CNR(pwm, u32ChannelNum, --u16CNR);
-    if(u32DutyCycle)
+    if(u32HighDutyCycle)
     {
-        PWM_SET_CMR(pwm, u32ChannelNum, u32DutyCycle * (u16CNR + 1) / 100 - 1);
+        PWM_SET_CMR(pwm, u32ChannelNum, u32HighDutyCycle * (u16CNR + 1) / 10000 - 1);
         (pwm)->WGCTL0 &= ~((PWM_WGCTL0_PRDPCTL0_Msk | PWM_WGCTL0_ZPCTL0_Msk) << (u32ChannelNum * 2));
         (pwm)->WGCTL0 |= (PWM_OUTPUT_LOW << (u32ChannelNum * 2 + PWM_WGCTL0_PRDPCTL0_Pos));
         (pwm)->WGCTL1 &= ~((PWM_WGCTL1_CMPDCTL0_Msk | PWM_WGCTL1_CMPUCTL0_Msk) << (u32ChannelNum * 2));

diff --git a/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.h b/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.h
@@ -476,7 +476,7 @@ uint32_t PWM_ConfigOutputChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u3
 uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm,
                                  uint32_t u32ChannelNum,
                                  uint32_t u32Frequency,
-                                 uint32_t u32DutyCycle,
+                                 uint32_t u32HighDutyCycle,
                                  uint32_t u32Frequency2);
 void PWM_Start(PWM_T *pwm, uint32_t u32ChannelMask);
 void PWM_Stop(PWM_T *pwm, uint32_t u32ChannelMask);

diff --git a/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c
@@ -195,7 +195,7 @@ static void pwmout_config(pwmout_t *obj)
     uint32_t chn = NU_MODSUBINDEX(obj->pwm);
     // NOTE: Support period < 1s
     //PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
 }
 
 const PinMap *pwmout_pinmap()

diff --git a/targets/TARGET_NUVOTON/TARGET_M480/device/StdDriver/inc/m480_epwm.h b/targets/TARGET_NUVOTON/TARGET_M480/device/StdDriver/inc/m480_epwm.h
@@ -541,7 +541,7 @@ uint32_t EPWM_ConfigOutputChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t
 uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm,
                                   uint32_t u32ChannelNum,
                                   uint32_t u32Frequency,
-                                  uint32_t u32DutyCycle,
+                                  uint32_t u32HighDutyCycle,
                                   uint32_t u32Frequency2);
 void EPWM_Start(EPWM_T *epwm, uint32_t u32ChannelMask);
 void EPWM_Stop(EPWM_T *epwm, uint32_t u32ChannelMask);

diff --git a/targets/TARGET_NUVOTON/TARGET_M480/device/StdDriver/src/m480_epwm.c b/targets/TARGET_NUVOTON/TARGET_M480/device/StdDriver/src/m480_epwm.c
@@ -135,7 +135,7 @@ uint32_t EPWM_ConfigCaptureChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_
  */
 uint32_t EPWM_ConfigOutputChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32DutyCycle)
 {
-    return EPWM_ConfigOutputChannel2(epwm, u32ChannelNum, u32Frequency, u32DutyCycle, 1);
+    return EPWM_ConfigOutputChannel2(epwm, u32ChannelNum, u32Frequency, u32DutyCycle*100, 1);
 }
 
 /**
@@ -145,15 +145,15 @@ uint32_t EPWM_ConfigOutputChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t
  *                - EPWM1 : EPWM Group 1
  * @param[in] u32ChannelNum EPWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency / u32Frequency2
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32HighDutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure EPWM frequency may affect
  *       existing frequency of other channel.
  * @note This function is used for initial stage.
  *       To change duty cycle later, it should get the configured period value and calculate the new comparator value.
  */
-uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32DutyCycle, uint32_t u32Frequency2)
+uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t u32Frequency, uint32_t u32HighDutyCycle, uint32_t u32Frequency2)
 {
     uint32_t u32Src;
     uint32_t u32EPWMClockSrc;
@@ -211,7 +211,7 @@ uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_
 
     u32CNR -= 1U;
     EPWM_SET_CNR(epwm, u32ChannelNum, u32CNR);
-    EPWM_SET_CMR(epwm, u32ChannelNum, u32DutyCycle * (u32CNR + 1U) / 100U);
+    EPWM_SET_CMR(epwm, u32ChannelNum, u32HighDutyCycle * (u32CNR + 1U) / 10000U);
 
     (epwm)->WGCTL0 = ((epwm)->WGCTL0 & ~(((1UL << EPWM_WGCTL0_PRDPCTL0_Pos) | (1UL << EPWM_WGCTL0_ZPCTL0_Pos)) << (u32ChannelNum << 1U))) | \
                      ((uint32_t)EPWM_OUTPUT_HIGH << ((u32ChannelNum << 1U) + (uint32_t)EPWM_WGCTL0_ZPCTL0_Pos));

diff --git a/targets/TARGET_NUVOTON/TARGET_M480/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_M480/pwmout_api.c
@@ -198,10 +198,10 @@ static void pwmout_config(pwmout_t *obj, int start)
 
     // NOTE: Support period < 1s
     // NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
-    //       1. Inverse duty cycle (100 - duty)
+    //       1. Inverse duty cycle (10000 - duty)
     //       2. Inverse PWM output polarity
     //       This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
-    EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 10000 - obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
     pwm_base->POLCTL |= 1 << (EPWM_POLCTL_PINV0_Pos + chn);
 
     if (start) {

diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.c b/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.c
@@ -38,23 +38,23 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
                                   uint32_t u32Frequency,
                                   uint32_t u32DutyCycle)
 {
-    return PWM_ConfigOutputChannel2(pwm, u32ChannelNum, u32Frequency, u32DutyCycle, 1);
+    return PWM_ConfigOutputChannel2(pwm, u32ChannelNum, u32Frequency, u32DutyCycle*100, 1);
 }
 
 /**
  * @brief This function config PWM generator and get the nearest frequency in edge aligned auto-reload mode
  * @param[in] pwm The base address of PWM module
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32HighDutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
  *       existing frequency of other channel.
  */
 uint32_t PWM_ConfigOutputChannel2 (PWM_T *pwm,
                                   uint32_t u32ChannelNum,
                                   uint32_t u32Frequency,
-                                  uint32_t u32DutyCycle,
+                                  uint32_t u32HighDutyCycle,
                                   uint32_t u32Frequency2)
 {
     uint32_t i;
@@ -132,11 +132,11 @@ uint32_t PWM_ConfigOutputChannel2 (PWM_T *pwm,
     pwm->CLKSEL = (pwm->CLKSEL & ~(PWM_CLKSEL_CLKSEL0_Msk << (4 * u32ChannelNum))) | (u8Divider << (4 * u32ChannelNum));
     pwm->CTL |= (PWM_CTL_CH0MOD_Msk << (u32ChannelNum * 8));
     while((pwm->INTSTS & (PWM_INTSTS_DUTY0SYNC_Msk << u32ChannelNum)) == (PWM_INTSTS_DUTY0SYNC_Msk << u32ChannelNum));
-    if(u32DutyCycle == 0)
+    if(u32HighDutyCycle == 0)
         *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) &= ~PWM_DUTY_CM_Msk;
     else {
         *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) &= ~PWM_DUTY_CM_Msk;
-        *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) |= ((u32DutyCycle * (u16CNR + 1) / 100 - 1) << PWM_DUTY_CM_Pos);
+        *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) |= ((u32HighDutyCycle * (u16CNR + 1) / 10000 - 1) << PWM_DUTY_CM_Pos);
     }
     *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) &= ~PWM_DUTY_CN_Msk;
     *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) |= u16CNR;

diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.h b/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.h
@@ -168,7 +168,7 @@ uint32_t PWM_ConfigOutputChannel(PWM_T *pwm,
 uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm,
                                  uint32_t u32ChannelNum,
                                  uint32_t u32Frequency,
-                                 uint32_t u32DutyCycle,
+                                 uint32_t u32HighDutyCycle,
                                  uint32_t u32Frequency2);
 uint32_t PWM_ConfigCaptureChannel (PWM_T *pwm,
                                    uint32_t u32ChannelNum,

diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_NANO100/pwmout_api.c
@@ -198,10 +198,10 @@ static void pwmout_config(pwmout_t *obj)
     uint32_t chn = NU_MODSUBINDEX(obj->pwm);
     // NOTE: Support period < 1s
     // NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
-    //       1. Inverse duty cycle (100 - duty)
+    //       1. Inverse duty cycle (10000 - duty)
     //       2. Inverse PWM output polarity
     //       This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - (obj->pulsewidth_us * 100 / obj->period_us), obj->period_us);
+    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 10000 - (obj->pulsewidth_us * 10000 / obj->period_us), obj->period_us);
 }
 
 const PinMap *pwmout_pinmap()