File content as of revision 0:fbdae7e6d805:

/**************************************************************************//**
 * @file     timer.c
 * @brief    M480 Timer PWM Controller(Timer PWM) driver source file
 *
 * @copyright (C) 2017 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "M480.h"


/** @addtogroup M480_Device_Driver M480 Device Driver
  @{
*/

/** @addtogroup M480_TIMER_PWM_Driver TIMER PWM Driver
  @{
*/

/** @addtogroup M480_TIMER_PWM_EXPORTED_FUNCTIONS TIMER PWM Exported Functions
  @{
*/

/**
  * @brief      Set PWM Counter Clock Source
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32CntClkSrc    PWM counter clock source, could be one of following source
  *                                 - \ref TPWM_CNTR_CLKSRC_TMR_CLK
  *                                 - \ref TPWM_CNTR_CLKSRC_TIMER0_INT
  *                                 - \ref TPWM_CNTR_CLKSRC_TIMER1_INT
  *                                 - \ref TPWM_CNTR_CLKSRC_TIMER2_INT
  *                                 - \ref TPWM_CNTR_CLKSRC_TIMER3_INT
  *
  * @return     None
  *
  * @details    This function is used to set PWM counter clock source.
  */
void TPWM_SetCounterClockSource(TIMER_T *timer, uint32_t u32CntClkSrc)
{
    (timer)->PWMCLKSRC = ((timer)->PWMCLKSRC & ~TIMER_PWMCLKSRC_CLKSRC_Msk) | u32CntClkSrc;
}

/**
  * @brief      Configure PWM Output Frequency and Duty Cycle
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @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 API is used to configure PWM output frequency and duty cycle in up count type and auto-reload operation mode.
  * @note       This API is only available if Timer PWM counter clock source is from TMRx_CLK.
  */
uint32_t TPWM_ConfigOutputFreqAndDuty(TIMER_T *timer, uint32_t u32Frequency, uint32_t u32DutyCycle)
{
    uint32_t u32PWMClockFreq, u32TargetFreq;
    uint32_t u32Prescaler = 0x1000UL, u32Period, u32CMP;

    if((timer == TIMER0) || (timer == TIMER1)) {
        u32PWMClockFreq = CLK_GetPCLK0Freq();
    } else {
        u32PWMClockFreq = CLK_GetPCLK1Freq();
    }

    /* Calculate u16PERIOD and u16PSC */
    for(u32Prescaler = 1UL; u32Prescaler <= 0x1000UL; u32Prescaler++) {
        u32Period = (u32PWMClockFreq / u32Prescaler) / u32Frequency;

        /* If target u32Period is larger than 0x10000, need to use a larger prescaler */
        if(u32Period <= 0x10000UL) {
            break;
        }
    }
    /* Store return value here 'cos we're gonna change u32Prescaler & u32Period to the real value to fill into register */
    u32TargetFreq = (u32PWMClockFreq / u32Prescaler) / u32Period;

    /* Set PWM to up count type */
    timer->PWMCTL = (timer->PWMCTL & ~TIMER_PWMCTL_CNTTYPE_Msk) | (TPWM_UP_COUNT << TIMER_PWMCTL_CNTTYPE_Pos);

    /* Set PWM to auto-reload mode */
    timer->PWMCTL = (timer->PWMCTL & ~TIMER_PWMCTL_CNTMODE_Msk) | TPWM_AUTO_RELOAD_MODE;

    /* Convert to real register value */
    TPWM_SET_PRESCALER(timer, (u32Prescaler - 1UL));

    TPWM_SET_PERIOD(timer, (u32Period - 1UL));
    if(u32DutyCycle) {
        u32CMP = (u32DutyCycle * u32Period) / 100UL;
    } else {
        u32CMP = 0UL;
    }

    TPWM_SET_CMPDAT(timer, u32CMP);

    return (u32TargetFreq);
}

/**
  * @brief      Enable Dead-Time Function
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32DTCount  Dead-Time duration in PWM clock count, valid values are between 0x0~0xFFF, but 0x0 means there is no Dead-Time insertion.
  *
  * @return     None
  *
  * @details    This function is used to enable Dead-Time function and counter source is the same as Timer PWM clock source.
  * @note       The register write-protection function should be disabled before using this function.
  */
void TPWM_EnableDeadTime(TIMER_T *timer, uint32_t u32DTCount)
{
    timer->PWMDTCTL = TIMER_PWMDTCTL_DTEN_Msk | u32DTCount;
}

/**
  * @brief      Enable Dead-Time Function
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32DTCount  Dead-Time duration in PWM clock count, valid values are between 0x0~0xFFF, but 0x0 means there is no Dead-Time insertion.
  *
  * @return     None
  *
  * @details    This function is used to enable Dead-Time function and counter source is the Timer PWM clock source with prescale.
  * @note       The register write-protection function should be disabled before using this function.
  */
void TPWM_EnableDeadTimeWithPrescale(TIMER_T *timer, uint32_t u32DTCount)
{
    timer->PWMDTCTL = TIMER_PWMDTCTL_DTCKSEL_Msk | TIMER_PWMDTCTL_DTEN_Msk | u32DTCount;
}

/**
  * @brief      Disable Dead-Time Function
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  *
  * @return     None
  *
  * @details    This function is used to enable Dead-time of selected channel.
  * @note       The register write-protection function should be disabled before using this function.
  */
void TPWM_DisableDeadTime(TIMER_T *timer)
{
    timer->PWMDTCTL = 0x0UL;
}

/**
  * @brief      Enable PWM Counter
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  *
  * @return     None
  *
  * @details    This function is used to enable PWM generator and start counter counting.
  */
void TPWM_EnableCounter(TIMER_T *timer)
{
    timer->PWMCTL |= TIMER_PWMCTL_CNTEN_Msk;
}

/**
  * @brief      Disable PWM Generator
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  *
  * @return     None
  *
  * @details This function is used to disable PWM counter immediately by clear CNTEN (TIMERx_PWMCTL[0]) bit.
  */
void TPWM_DisableCounter(TIMER_T *timer)
{
    timer->PWMCTL &= ~TIMER_PWMCTL_CNTEN_Msk;
}

/**
  * @brief      Enable Trigger EADC
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32Condition    The condition to trigger EADC. It could be one of following conditions:
  *                                 - \ref TPWM_TRIGGER_EADC_AT_ZERO_POINT
  *                                 - \ref TPWM_TRIGGER_EADC_AT_PERIOD_POINT
  *                                 - \ref TPWM_TRIGGER_EADC_AT_ZERO_OR_PERIOD_POINT
  *                                 - \ref TPWM_TRIGGER_EADC_AT_COMPARE_UP_COUNT_POINT
  *                                 - \ref TPWM_TRIGGER_EADC_AT_COMPARE_DOWN_COUNT_POINT
  *
  * @return     None
  *
  * @details    This function is used to enable specified counter compare event to trigger EADC.
  */
void TPWM_EnableTriggerEADC(TIMER_T *timer, uint32_t u32Condition)
{
    timer->PWMEADCTS = TIMER_PWMEADCTS_TRGEN_Msk | u32Condition;
}

/**
  * @brief      Disable Trigger EADC
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  *
  * @return     None
  *
  * @details    This function is used to disable counter compare event to trigger EADC.
  */
void TPWM_DisableTriggerEADC(TIMER_T *timer)
{
    timer->PWMEADCTS = 0x0UL;
}

/**
  * @brief      Enable Fault Brake Function
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32CH0Level     PWMx_CH0 output level while fault brake event occurs. Valid value is one of following setting
  *                                 - \ref TPWM_OUTPUT_TOGGLE
  *                                 - \ref TPWM_OUTPUT_NOTHING
  *                                 - \ref TPWM_OUTPUT_LOW
  *                                 - \ref TPWM_OUTPUT_HIGH
  * @param[in]  u32CH1Level     PWMx_CH1 output level while fault brake event occurs. Valid value is one of following setting
  *                                 - \ref TPWM_OUTPUT_TOGGLE
  *                                 - \ref TPWM_OUTPUT_NOTHING
  *                                 - \ref TPWM_OUTPUT_LOW
  *                                 - \ref TPWM_OUTPUT_HIGH
  * @param[in]  u32BrakeSource  Fault brake source, combination of following source
  *                                 - \ref TPWM_BRAKE_SOURCE_EDGE_ACMP0
  *                                 - \ref TPWM_BRAKE_SOURCE_EDGE_ACMP1
  *                                 - \ref TPWM_BRAKE_SOURCE_EDGE_BKPIN
  *                                 - \ref TPWM_BRAKE_SOURCE_EDGE_SYS_CSS
  *                                 - \ref TPWM_BRAKE_SOURCE_EDGE_SYS_BOD
  *                                 - \ref TPWM_BRAKE_SOURCE_EDGE_SYS_COR
  *                                 - \ref TPWM_BRAKE_SOURCE_EDGE_SYS_RAM
  *                                 - \ref TPWM_BRAKE_SOURCE_LEVEL_ACMP0
  *                                 - \ref TPWM_BRAKE_SOURCE_LEVEL_ACMP1
  *                                 - \ref TPWM_BRAKE_SOURCE_LEVEL_BKPIN
  *                                 - \ref TPWM_BRAKE_SOURCE_LEVEL_SYS_CSS
  *                                 - \ref TPWM_BRAKE_SOURCE_LEVEL_SYS_BOD
  *                                 - \ref TPWM_BRAKE_SOURCE_LEVEL_SYS_COR
  *                                 - \ref TPWM_BRAKE_SOURCE_LEVEL_SYS_RAM
  *
  * @return     None
  *
  * @details    This function is used to enable fault brake function.
  * @note       The register write-protection function should be disabled before using this function.
  */
void TPWM_EnableFaultBrake(TIMER_T *timer, uint32_t u32CH0Level, uint32_t u32CH1Level, uint32_t u32BrakeSource)
{
    timer->PWMFAILBRK |= ((u32BrakeSource >> 16) & 0xFUL);
    timer->PWMBRKCTL = (timer->PWMBRKCTL & ~(TIMER_PWMBRKCTL_BRKAEVEN_Msk | TIMER_PWMBRKCTL_BRKAODD_Msk)) |
                       (u32BrakeSource & 0xFFFFUL) | (u32CH0Level << TIMER_PWMBRKCTL_BRKAEVEN_Pos) | (u32CH1Level << TIMER_PWMBRKCTL_BRKAODD_Pos);
}

/**
  * @brief      Enable Fault Brake Interrupt
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32IntSource    Interrupt source, could be one of following source
  *                                 - \ref TPWM_BRAKE_EDGE
  *                                 - \ref TPWM_BRAKE_LEVEL
  *
  * @return     None
  *
  * @details    This function is used to enable fault brake interrupt.
  * @note       The register write-protection function should be disabled before using this function.
  */
void TPWM_EnableFaultBrakeInt(TIMER_T *timer, uint32_t u32IntSource)
{
    timer->PWMINTEN1 |= u32IntSource;
}

/**
  * @brief      Disable Fault Brake Interrupt
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32IntSource    Interrupt source, could be one of following source
  *                                 - \ref TPWM_BRAKE_EDGE
  *                                 - \ref TPWM_BRAKE_LEVEL
  *
  * @return     None
  *
  * @details    This function is used to disable fault brake interrupt.
  * @note       The register write-protection function should be disabled before using this function.
  */
void TPWM_DisableFaultBrakeInt(TIMER_T *timer, uint32_t u32IntSource)
{
    timer->PWMINTEN1 &= ~u32IntSource;
}

/**
  * @brief      Indicate Fault Brake Interrupt Flag
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32IntSource    Interrupt source, could be one of following source
  *                                 - \ref TPWM_BRAKE_EDGE
  *                                 - \ref TPWM_BRAKE_LEVEL
  *
  * @return     Fault brake interrupt flag of specified source
  * @retval     0       Fault brake interrupt did not occurred
  * @retval     1       Fault brake interrupt occurred
  *
  * @details    This function is used to indicate fault brake interrupt flag occurred or not of selected source.
  */
uint32_t TPWM_GetFaultBrakeIntFlag(TIMER_T *timer, uint32_t u32IntSource)
{
    return ((timer->PWMINTSTS1 & (0x3UL << u32IntSource))? 1UL : 0UL);
}

/**
  * @brief      Clear Fault Brake Interrupt Flags
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32IntSource    Interrupt source, could be one of following source
  *                                 - \ref TPWM_BRAKE_EDGE
  *                                 - \ref TPWM_BRAKE_LEVEL
  *
  * @return     None
  *
  * @details    This function is used to clear fault brake interrupt flags of selected source.
  * @note       The register write-protection function should be disabled before using this function.
  */
void TPWM_ClearFaultBrakeIntFlag(TIMER_T *timer, uint32_t u32IntSource)
{
    timer->PWMINTSTS1 = (0x3UL << u32IntSource);
}

/**
  * @brief      Enable load mode of selected channel
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32LoadMode  Timer PWM counter loading mode, could be one of following mode
  *                             - \ref TPWM_LOAD_MODE_PERIOD
  *                             - \ref TPWM_LOAD_MODE_IMMEDIATE
  *                             - \ref TPWM_LOAD_MODE_CENTER
  *
  * @return     None
  *
  * @details    This function is used to enable load mode of selected channel.
  * @note       The default loading mode is period loading mode.
  */
void TPWM_SetLoadMode(TIMER_T *timer, uint32_t u32LoadMode)
{
    timer->PWMCTL = (timer->PWMCTL & ~(TIMER_PWMCTL_IMMLDEN_Msk | TIMER_PWMCTL_CTRLD_Msk)) | u32LoadMode;
}

/**
  * @brief      Enable brake pin noise filter function
  *
  * @param[in]  timer           The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in]  u32BrakePinSrc  The external brake pin source, could be one of following source
  *                                 - \ref TPWM_TM_BRAKE0
  *                                 - \ref TPWM_TM_BRAKE1
  *                                 - \ref TPWM_TM_BRAKE2
  *                                 - \ref TPWM_TM_BRAKE3
  * @param[in]  u32DebounceCnt  This value controls the real debounce sample time.
  *                             The target debounce sample time is (debounce sample clock period) * (u32DebounceCnt).
  * @param[in]  u32ClkSrcSel    Brake pin detector debounce clock source, could be one of following source
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_1
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_2
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_4
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_8
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_16
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_32
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_64
  *                                 - \ref TPWM_BKP_DBCLK_PCLK_DIV_128
  *
  * @return     None
  *
  * @details    This function is used to enable external brake pin detector noise filter function.
  */
void TPWM_EnableBrakePinDebounce(TIMER_T *timer, uint32_t u32BrakePinSrc, uint32_t u32DebounceCnt, uint32_t u32ClkSrcSel)
{
    timer->PWMBNF = (timer->PWMBNF & ~(TIMER_PWMBNF_BKPINSRC_Msk | TIMER_PWMBNF_BRKFCNT_Msk | TIMER_PWMBNF_BRKNFSEL_Msk)) |
                    (u32BrakePinSrc << TIMER_PWMBNF_BKPINSRC_Pos) |
                    (u32DebounceCnt << TIMER_PWMBNF_BRKFCNT_Pos) |
                    (u32ClkSrcSel << TIMER_PWMBNF_BRKNFSEL_Pos) | TIMER_PWMBNF_BRKNFEN_Msk;
}

/**
  * @brief      Disable brake pin noise filter function
  *
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  *
  * @return     None
  *
  * @details    This function is used to disable external brake pin detector noise filter function.
  */
void TPWM_DisableBrakePinDebounce(TIMER_T *timer)
{
    timer->PWMBNF &= ~TIMER_PWMBNF_BRKNFEN_Msk;
}


/**
  * @brief Enable brake pin inverse function
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @return None
  * @details This function is used to enable PWM brake pin inverse function.
  */
void TPWM_EnableBrakePinInverse(TIMER_T *timer)
{
    timer->PWMBNF |= TIMER_PWMBNF_BRKPINV_Msk;
}

/**
  * @brief Disable brake pin inverse function
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @return None
  * @details This function is used to disable PWM brake pin inverse function.
  */
void TPWM_DisableBrakePinInverse(TIMER_T *timer)
{
    timer->PWMBNF &= ~TIMER_PWMBNF_BRKPINV_Msk;
}

/**
  * @brief Set brake pin source
  * @param[in]  timer       The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
  * @param[in] u32BrakePinNum Brake pin selection. One of the following:
  *                 - \ref TPWM_TM_BRAKE0
  *                 - \ref TPWM_TM_BRAKE1
  *                 - \ref TPWM_TM_BRAKE2
  *                 - \ref TPWM_TM_BRAKE3
  * @return None
  * @details This function is used to set PWM brake pin source.
  */
void TPWM_SetBrakePinSource(TIMER_T *timer, uint32_t u32BrakePinNum)
{
    timer->PWMBNF = (((timer)->PWMBNF & ~TIMER_PWMBNF_BKPINSRC_Msk) | (u32BrakePinNum << TIMER_PWMBNF_BKPINSRC_Pos));
}


/*@}*/ /* end of group M480_TIMER_PWM_EXPORTED_FUNCTIONS */

/*@}*/ /* end of group M480_TIMER_PWM_Driver */

/*@}*/ /* end of group M480_Device_Driver */

/*** (C) COPYRIGHT 2017 Nuvoton Technology Corp. ***/