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/**************************************************************************//**
* @file pwm.c
* @version V3.00
* $Revision: 12 $
* $Date: 15/05/05 3:35p $
* @brief PWM driver source file
*
* @note
* SPDX-License-Identifier: Apache-2.0
* Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "NUC200Series.h"
/** @addtogroup Standard_Driver Standard Driver
@{
*/
/** @addtogroup PWM_Driver PWM Driver
@{
*/
/** @addtogroup PWM_EXPORTED_FUNCTIONS PWM Exported Functions
@{
*/
/**
* @brief Configure PWM capture and get the nearest unit time.
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32UnitTimeNsec The unit time of counter
* @param[in] u32CaptureEdge The condition to latch the counter. This parameter is not used
* @return The nearest unit time in nano second.
* @details This function is used to configure PWM capture and get the nearest unit time.
*/
uint32_t PWM_ConfigCaptureChannel(PWM_T *pwm,
uint32_t u32ChannelNum,
uint32_t u32UnitTimeNsec,
uint32_t u32CaptureEdge)
{
uint32_t u32Src;
uint32_t u32PWMClockSrc;
uint32_t u32PWMClkTbl[8] = {__HXT, __LXT, NULL, __HIRC, NULL, NULL, NULL, __LIRC};
uint32_t u32NearestUnitTimeNsec;
uint8_t u8Divider = 1;
/* this table is mapping divider value to register configuration */
uint32_t u32PWMDividerToRegTbl[17] = {NULL, 4, 0, NULL, 1, NULL, NULL, NULL, 2, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 3};
uint16_t u16Prescale = 2;
uint16_t u16CNR = 0xFFFF;
if(pwm == PWMA)
{
if(u32ChannelNum < 2)/* channel 0 and channel 1 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM01_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM01_S_EXT_Pos - 2)) | (CLK->CLKSEL1 & (CLK_CLKSEL1_PWM01_S_Msk)) >> (CLK_CLKSEL1_PWM01_S_Pos);
else /* channel 2 and channel 3 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM23_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM23_S_EXT_Pos - 2)) | (CLK->CLKSEL1 & (CLK_CLKSEL1_PWM23_S_Msk)) >> (CLK_CLKSEL1_PWM23_S_Pos);
}
else /*pwm == PWMB*/
{
if(u32ChannelNum < 2)/* channel 0 and channel 1 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM45_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM45_S_EXT_Pos - 2)) | (CLK->CLKSEL2 & (CLK_CLKSEL2_PWM45_S_Msk)) >> (CLK_CLKSEL2_PWM45_S_Pos);
else /* channel 2 and channel 3 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM67_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM67_S_EXT_Pos - 2)) | (CLK->CLKSEL2 & (CLK_CLKSEL2_PWM67_S_Msk)) >> (CLK_CLKSEL2_PWM67_S_Pos);
}
if(u32Src == 2)
{
SystemCoreClockUpdate();
u32PWMClockSrc = SystemCoreClock;
}
else
{
u32PWMClockSrc = u32PWMClkTbl[u32Src];
}
u32PWMClockSrc /= 1000;
for(; u16Prescale <= 0x100; u16Prescale++)
{
u32NearestUnitTimeNsec = (1000000 * u16Prescale * u8Divider) / u32PWMClockSrc;
if(u32NearestUnitTimeNsec < u32UnitTimeNsec)
{
if((u16Prescale == 0x100) && (u8Divider == 16)) //limit to the maximum unit time(nano second)
break;
if(u16Prescale == 0x100)
{
u16Prescale = 2;
u8Divider <<= 1; // clk divider could only be 1, 2, 4, 8, 16
continue;
}
if(!((1000000 * ((u16Prescale * u8Divider) + 1)) > (u32NearestUnitTimeNsec * u32PWMClockSrc)))
break;
continue;
}
break;
}
// Store return value here 'cos we're gonna change u8Divider & u16Prescale & u16CNR to the real value to fill into register
u16Prescale -= 1;
// convert to real register value
u8Divider = u32PWMDividerToRegTbl[u8Divider];
// every two channels share a prescaler
(pwm)->PPR = ((pwm)->PPR & ~(PWM_PPR_CP01_Msk << ((u32ChannelNum >> 1) * 8))) | (u16Prescale << ((u32ChannelNum >> 1) * 8));
(pwm)->CSR = ((pwm)->CSR & ~(PWM_CSR_CSR0_Msk << (4 * u32ChannelNum))) | (u8Divider << (4 * u32ChannelNum));
// set PWM to edge aligned type
(pwm)->PCR &= ~(PWM_PCR_PWM01TYPE_Msk << (u32ChannelNum >> 1));
(pwm)->PCR |= PWM_PCR_CH0MOD_Msk << (8 * u32ChannelNum);
*((__IO uint32_t *)((((uint32_t) & ((pwm)->CNR0)) + (u32ChannelNum) * 12))) = u16CNR;
return (u32NearestUnitTimeNsec);
}
/**
* @brief Configure PWM generator and get the nearest frequency in edge aligned auto-reload mode
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @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%...
* @return Nearest frequency clock in nano second
* @details This function is used to configure PWM generator and get the nearest frequency in edge aligned auto-reload mode.
* @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_ConfigOutputChannel(PWM_T *pwm,
uint32_t u32ChannelNum,
uint32_t u32Frequency,
uint32_t u32DutyCycle)
{
uint32_t u32Src;
uint32_t u32PWMClockSrc;
uint32_t u32PWMClkTbl[8] = {__HXT, __LXT, NULL, __HIRC, NULL, NULL, NULL, __LIRC};
uint32_t i;
uint8_t u8Divider = 1, u8Prescale = 0xFF;
/* this table is mapping divider value to register configuration */
uint32_t u32PWMDividerToRegTbl[17] = {NULL, 4, 0, NULL, 1, NULL, NULL, NULL, 2, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 3};
uint16_t u16CNR = 0xFFFF;
if(pwm == PWMA)
{
if(u32ChannelNum < 2)/* channel 0 and channel 1 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM01_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM01_S_EXT_Pos - 2)) | (CLK->CLKSEL1 & (CLK_CLKSEL1_PWM01_S_Msk)) >> (CLK_CLKSEL1_PWM01_S_Pos);
else /* channel 2 and channel 3 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM23_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM23_S_EXT_Pos - 2)) | (CLK->CLKSEL1 & (CLK_CLKSEL1_PWM23_S_Msk)) >> (CLK_CLKSEL1_PWM23_S_Pos);
}
else /*pwm == PWMB*/
{
if(u32ChannelNum < 2)/* channel 0 and channel 1 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM45_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM45_S_EXT_Pos - 2)) | (CLK->CLKSEL2 & (CLK_CLKSEL2_PWM45_S_Msk)) >> (CLK_CLKSEL2_PWM45_S_Pos);
else /* channel 2 and channel 3 */
u32Src = ((CLK->CLKSEL2 & (CLK_CLKSEL2_PWM67_S_EXT_Msk)) >> (CLK_CLKSEL2_PWM67_S_EXT_Pos - 2)) | (CLK->CLKSEL2 & (CLK_CLKSEL2_PWM67_S_Msk)) >> (CLK_CLKSEL2_PWM67_S_Pos);
}
if(u32Src == 2)
{
SystemCoreClockUpdate();
u32PWMClockSrc = SystemCoreClock;
}
else
{
u32PWMClockSrc = u32PWMClkTbl[u32Src];
}
for(; u8Divider < 17; u8Divider <<= 1) // clk divider could only be 1, 2, 4, 8, 16
{
i = (u32PWMClockSrc / u32Frequency) / u8Divider;
// If target value is larger than CNR * prescale, need to use a larger divider
if(i > (0x10000 * 0x100))
continue;
// CNR = 0xFFFF + 1, get a prescaler that CNR value is below 0xFFFF
u8Prescale = (i + 0xFFFF) / 0x10000;
// u8Prescale must at least be 2, otherwise the output stop
if(u8Prescale < 3)
u8Prescale = 2;
i /= u8Prescale;
if(i <= 0x10000)
{
if(i == 1)
u16CNR = 1; // Too fast, and PWM cannot generate expected frequency...
else
u16CNR = i;
break;
}
}
// Store return value here 'cos we're gonna change u8Divider & u8Prescale & u16CNR to the real value to fill into register
i = u32PWMClockSrc / (u8Prescale * u8Divider * u16CNR);
u8Prescale -= 1;
u16CNR -= 1;
// convert to real register value
u8Divider = u32PWMDividerToRegTbl[u8Divider];
// every two channels share a prescaler
(pwm)->PPR = ((pwm)->PPR & ~(PWM_PPR_CP01_Msk << ((u32ChannelNum >> 1) * 8))) | (u8Prescale << ((u32ChannelNum >> 1) * 8));
(pwm)->CSR = ((pwm)->CSR & ~(PWM_CSR_CSR0_Msk << (4 * u32ChannelNum))) | (u8Divider << (4 * u32ChannelNum));
// set PWM to edge aligned type
(pwm)->PCR &= ~(PWM_PCR_PWM01TYPE_Msk << (u32ChannelNum >> 1));
(pwm)->PCR |= PWM_PCR_CH0MOD_Msk << (8 * u32ChannelNum);
if(u32DutyCycle)
{
*((__IO uint32_t *)((((uint32_t) & ((pwm)->CMR0)) + u32ChannelNum * 12))) = u32DutyCycle * (u16CNR + 1) / 100 - 1;
}
else
{
*((__IO uint32_t *)((((uint32_t) & ((pwm)->CMR0)) + u32ChannelNum * 12))) = 0;
}
*((__IO uint32_t *)((((uint32_t) & ((pwm)->CNR0)) + (u32ChannelNum) * 12))) = u16CNR;
return(i);
}
/**
* @brief Start PWM module
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelMask Combination of enabled channels. Each bit corresponds to a channel.
* Bit 0 is channel 0, bit 1 is channel 1...
* @return None
* @details This function is used to start PWM module.
*/
void PWM_Start(PWM_T *pwm, uint32_t u32ChannelMask)
{
uint32_t u32Mask = 0, i;
for(i = 0; i < PWM_CHANNEL_NUM; i ++)
{
if(u32ChannelMask & (1 << i))
{
u32Mask |= (PWM_PCR_CH0EN_Msk << (i * 8));
}
}
(pwm)->PCR |= u32Mask;
}
/**
* @brief Stop PWM module
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelMask Combination of enabled channels. Each bit corresponds to a channel.
* Bit 0 is channel 0, bit 1 is channel 1...
* @return None
* @details This function is used to stop PWM module.
*/
void PWM_Stop(PWM_T *pwm, uint32_t u32ChannelMask)
{
uint32_t i;
for(i = 0; i < PWM_CHANNEL_NUM; i ++)
{
if(u32ChannelMask & (1 << i))
{
*((__IO uint32_t *)((((uint32_t) & ((pwm)->CNR0)) + i * 12))) = 0;
}
}
}
/**
* @brief Stop PWM generation immediately by clear channel enable bit
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelMask Combination of enabled channels. Each bit corresponds to a channel.
* Bit 0 is channel 0, bit 1 is channel 1...
* @return None
* @details This function is used to stop PWM generation immediately by clear channel enable bit.
*/
void PWM_ForceStop(PWM_T *pwm, uint32_t u32ChannelMask)
{
uint32_t u32Mask = 0, i;
for(i = 0; i < PWM_CHANNEL_NUM; i ++)
{
if(u32ChannelMask & (1 << i))
{
u32Mask |= (PWM_PCR_CH0EN_Msk << (i * 8));
}
}
(pwm)->PCR &= ~u32Mask;
}
/**
* @brief Enable selected channel to trigger ADC
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32Condition This parameter is not used
* @return None
* @details This function is used to enable selected channel to trigger ADC.
* @note This function is only supported when PWM operating at Center-aligned type.
*/
void PWM_EnableADCTrigger(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Condition)
{
(pwm)->TCON |= (PWM_TCON_PWM0TEN_Msk << u32ChannelNum);
}
/**
* @brief Disable selected channel to trigger ADC
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @return None
* @details This function is used to disable selected channel to trigger ADC.
*/
void PWM_DisableADCTrigger(PWM_T *pwm, uint32_t u32ChannelNum)
{
(pwm)->TCON = ((pwm)->TCON & ~(PWM_TCON_PWM0TEN_Msk << u32ChannelNum));
}
/**
* @brief Clear selected channel trigger ADC flag
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32Condition This parameter is not used
* @return None
* @details This function is used to clear selected channel trigger ADC flag.
*/
void PWM_ClearADCTriggerFlag(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Condition)
{
(pwm)->TSTATUS = (PWM_TSTATUS_PWM0TF_Msk << u32ChannelNum);
}
/**
* @brief Get selected channel trigger ADC flag
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @retval 0 The specified channel trigger ADC to start of conversion flag is not set
* @retval 1 The specified channel trigger ADC to start of conversion flag is set
* @details This function is used to get PWM trigger ADC to start of conversion flag for specified channel.
*/
uint32_t PWM_GetADCTriggerFlag(PWM_T *pwm, uint32_t u32ChannelNum)
{
return (((pwm)->TSTATUS & (PWM_TSTATUS_PWM0TF_Msk << (u32ChannelNum))) ? 1 : 0);
}
/**
* @brief Enable capture of selected channel(s)
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelMask Combination of enabled channels. Each bit corresponds to a channel.
* Bit 0 is channel 0, bit 1 is channel 1...
* @return None
* @details This function is used to enable capture of selected channel(s).
*/
void PWM_EnableCapture(PWM_T *pwm, uint32_t u32ChannelMask)
{
uint32_t i;
for(i = 0; i < PWM_CHANNEL_NUM; i ++)
{
if(u32ChannelMask & (1 << i))
{
if(i < 2)
{
(pwm)->CCR0 |= PWM_CCR0_CAPCH0EN_Msk << (i * 16);
}
else
{
(pwm)->CCR2 |= PWM_CCR2_CAPCH2EN_Msk << ((i - 2) * 16);
}
}
}
(pwm)->CAPENR |= u32ChannelMask;
(pwm)->PBCR = 1;
}
/**
* @brief Disable capture of selected channel(s)
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelMask Combination of enabled channels. Each bit corresponds to a channel.
* Bit 0 is channel 0, bit 1 is channel 1...
* @return None
* @details This function is used to disable capture of selected channel(s).
*/
void PWM_DisableCapture(PWM_T *pwm, uint32_t u32ChannelMask)
{
uint32_t i;
for(i = 0; i < PWM_CHANNEL_NUM; i ++)
{
if(u32ChannelMask & (1 << i))
{
if(i < 2)
{
(pwm)->CCR0 &= ~(PWM_CCR0_CAPCH0EN_Msk << (i * 16));
}
else
{
(pwm)->CCR2 &= ~(PWM_CCR2_CAPCH2EN_Msk << ((i - 2) * 16));
}
}
}
(pwm)->CAPENR &= ~u32ChannelMask;
}
/**
* @brief Enables PWM output generation of selected channel(s)
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelMask Combination of enabled channels. Each bit corresponds to a channel.
* Set bit 0 to 1 enables channel 0 output, set bit 1 to 1 enables channel 1 output...
* @return None
* @details This function is used to enables PWM output generation of selected channel(s).
*/
void PWM_EnableOutput(PWM_T *pwm, uint32_t u32ChannelMask)
{
(pwm)->POE |= u32ChannelMask;
}
/**
* @brief Disables PWM output generation of selected channel(s)
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelMask Combination of enabled channels. Each bit corresponds to a channel
* Set bit 0 to 1 disables channel 0 output, set bit 1 to 1 disables channel 1 output...
* @return None
* @details This function is used to disables PWM output generation of selected channel(s).
*/
void PWM_DisableOutput(PWM_T *pwm, uint32_t u32ChannelMask)
{
(pwm)->POE &= ~u32ChannelMask;
}
/**
* @brief Enable Dead zone of selected channel
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32Duration Dead Zone length in PWM clock count, valid values are between 0~0xFF, but 0 means there is no
* dead zone.
* @return None
* @details This function is used to enable Dead zone of selected channel.
*/
void PWM_EnableDeadZone(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Duration)
{
// every two channels shares the same setting
u32ChannelNum >>= 1;
// set duration
(pwm)->PPR = ((pwm)->PPR & ~(PWM_PPR_DZI01_Msk << (8 * u32ChannelNum))) | (u32Duration << (PWM_PPR_DZI01_Pos + 8 * u32ChannelNum));
// enable dead zone
(pwm)->PCR |= (PWM_PCR_DZEN01_Msk << u32ChannelNum);
}
/**
* @brief Disable Dead zone of selected channel
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @return None
* @details This function is used to disable Dead zone of selected channel.
*/
void PWM_DisableDeadZone(PWM_T *pwm, uint32_t u32ChannelNum)
{
// every two channels shares the same setting
u32ChannelNum >>= 1;
// enable dead zone
(pwm)->PCR &= ~(PWM_PCR_DZEN01_Msk << u32ChannelNum);
}
/**
* @brief Enable capture interrupt of selected channel.
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32Edge Rising or falling edge to latch counter.
* - \ref PWM_CAPTURE_INT_RISING_LATCH
* - \ref PWM_CAPTURE_INT_FALLING_LATCH
* @return None
* @details This function is used to enable capture interrupt of selected channel.
*/
void PWM_EnableCaptureInt(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Edge)
{
if(u32ChannelNum < 2)
(pwm)->CCR0 |= u32Edge << (u32ChannelNum * 16);
else
(pwm)->CCR2 |= u32Edge << ((u32ChannelNum - 2) * 16);
}
/**
* @brief Disable capture interrupt of selected channel.
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32Edge Rising or falling edge to latch counter.
* - \ref PWM_CAPTURE_INT_RISING_LATCH
* - \ref PWM_CAPTURE_INT_FALLING_LATCH
* @return None
* @details This function is used to disable capture interrupt of selected channel.
*/
void PWM_DisableCaptureInt(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Edge)
{
if(u32ChannelNum < 2)
(pwm)->CCR0 &= ~(u32Edge << (u32ChannelNum * 16));
else
(pwm)->CCR2 &= ~(u32Edge << ((u32ChannelNum - 2) * 16));
}
/**
* @brief Clear capture interrupt of selected channel.
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32Edge Rising or falling edge to latch counter.
* - \ref PWM_CAPTURE_INT_RISING_LATCH
* - \ref PWM_CAPTURE_INT_FALLING_LATCH
* @return None
* @details This function is used to clear capture interrupt of selected channel.
*/
void PWM_ClearCaptureIntFlag(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32Edge)
{
//clear capture interrupt flag, and clear CRLR or CFLR latched indicator
if(u32ChannelNum < 2)
(pwm)->CCR0 = ((pwm)->CCR0 & PWM_CCR_MASK) | (PWM_CCR0_CAPIF0_Msk << (u32ChannelNum * 16)) | (u32Edge << (u32ChannelNum * 16 + 5));
else
(pwm)->CCR2 = ((pwm)->CCR2 & PWM_CCR_MASK) | (PWM_CCR2_CAPIF2_Msk << ((u32ChannelNum - 2) * 16)) | (u32Edge << ((u32ChannelNum - 2) * 16 + 5));
}
/**
* @brief Get capture interrupt of selected channel.
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @retval 0 No capture interrupt
* @retval 1 Rising edge latch interrupt
* @retval 2 Falling edge latch interrupt
* @retval 3 Rising and falling latch interrupt
* @details This function is used to get capture interrupt of selected channel.
*/
uint32_t PWM_GetCaptureIntFlag(PWM_T *pwm, uint32_t u32ChannelNum)
{
if(u32ChannelNum < 2)
{
return (((pwm)->CCR0 & ((PWM_CCR0_CRLRI0_Msk | PWM_CCR0_CFLRI0_Msk) << (u32ChannelNum * 16))) >> (PWM_CCR0_CRLRI0_Pos + u32ChannelNum * 16));
}
else
{
return (((pwm)->CCR2 & ((PWM_CCR2_CRLRI2_Msk | PWM_CCR2_CFLRI2_Msk) << ((u32ChannelNum - 2) * 16))) >> (PWM_CCR2_CRLRI2_Pos + (u32ChannelNum - 2) * 16));
}
}
/**
* @brief Enable duty interrupt of selected channel
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32IntDutyType This parameter is not used
* @return None
* @details This function is used to enable duty interrupt of selected channel.
* Every two channels, (0 & 1), (2 & 3), shares the duty interrupt type setting.
*/
void PWM_EnableDutyInt(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32IntDutyType)
{
(pwm)->PIER |= (PWM_PIER_PWMDIE0_Msk << u32ChannelNum);
}
/**
* @brief Disable duty interrupt of selected channel
* @param[in] pwm The pointer of the specified PWM module
* - PWMA : PWM Group A
* - PWMB : PWM Group B
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @return None
* @details This function is used to disable duty interrupt of selected channel.
*/
void PWM_DisableDutyInt(PWM_T *pwm, uint32_t u32ChannelNum)
{
(pwm)->PIER &= ~(PWM_PIER_PWMDIE0_Msk << u32ChannelNum);
}
/**
* @brief Clear duty interrupt flag of selected channel
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @return None
* @details This function is used to clear duty interrupt flag of selected channel.
*/
void PWM_ClearDutyIntFlag(PWM_T *pwm, uint32_t u32ChannelNum)
{
(pwm)->PIIR = PWM_PIIR_PWMDIF0_Msk << u32ChannelNum;
}
/**
* @brief Get duty interrupt flag of selected channel
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @retval 0 Duty interrupt did not occur
* @retval 1 Duty interrupt occurred
* @details This function is used to get duty interrupt flag of selected channel.
*/
uint32_t PWM_GetDutyIntFlag(PWM_T *pwm, uint32_t u32ChannelNum)
{
return (((pwm)->PIIR & (PWM_PIIR_PWMDIF0_Msk << u32ChannelNum)) ? 1 : 0);
}
/**
* @brief Enable period interrupt of selected channel
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @param[in] u32IntPeriodType Period interrupt type, could be either
* - \ref PWM_PERIOD_INT_UNDERFLOW
* - \ref PWM_PERIOD_INT_MATCH_CNR
* @return None
* @details This function is used to enable period interrupt of selected channel.
* Every two channels, (0 & 1), (2 & 3), shares the period interrupt type setting.
*/
void PWM_EnablePeriodInt(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u32IntPeriodType)
{
(pwm)->PIER = ((pwm)->PIER & ~(PWM_PIER_INT01TYPE_Msk << (u32ChannelNum >> 1))) | \
(PWM_PIER_PWMIE0_Msk << u32ChannelNum) | (u32IntPeriodType << (u32ChannelNum >> 1));
}
/**
* @brief Disable period interrupt of selected channel
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @return None
* @details This function is used to disable period interrupt of selected channel.
*/
void PWM_DisablePeriodInt(PWM_T *pwm, uint32_t u32ChannelNum)
{
(pwm)->PIER &= ~(PWM_PIER_PWMIE0_Msk << u32ChannelNum);
}
/**
* @brief Clear period interrupt of selected channel
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @return None
* @details This function is used to clear period interrupt of selected channel.
*/
void PWM_ClearPeriodIntFlag(PWM_T *pwm, uint32_t u32ChannelNum)
{
(pwm)->PIIR = (PWM_PIIR_PWMIF0_Msk << u32ChannelNum);
}
/**
* @brief Get period interrupt of selected channel
* @param[in] pwm The pointer of the specified PWM module
* @param[in] u32ChannelNum PWM channel number. Valid values are between 0~3
* @retval 0 Period interrupt did not occur
* @retval 1 Period interrupt occurred
* @details This function is used to get period interrupt of selected channel.
*/
uint32_t PWM_GetPeriodIntFlag(PWM_T *pwm, uint32_t u32ChannelNum)
{
return (((pwm)->PIIR & (PWM_PIIR_PWMIF0_Msk << (u32ChannelNum))) ? 1 : 0);
}
/*@}*/ /* end of group PWM_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group PWM_Driver */
/*@}*/ /* end of group Device_Driver */
/*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/
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