timer_pwm.c

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/**************************************************************************/
#include "NuMicro.h"


void TPWM_SetCounterClockSource(TIMER_T *timer, uint32_t u32CntClkSrc)
{
    (timer)->PWMCLKSRC = ((timer)->PWMCLKSRC & ~TIMER_PWMCLKSRC_CLKSRC_Msk) | u32CntClkSrc;
}

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);
}

void TPWM_EnableDeadTime(TIMER_T *timer, uint32_t u32DTCount)
{
    timer->PWMDTCTL = TIMER_PWMDTCTL_DTEN_Msk | u32DTCount;
}

void TPWM_EnableDeadTimeWithPrescale(TIMER_T *timer, uint32_t u32DTCount)
{
    timer->PWMDTCTL = TIMER_PWMDTCTL_DTCKSEL_Msk | TIMER_PWMDTCTL_DTEN_Msk | u32DTCount;
}

void TPWM_DisableDeadTime(TIMER_T *timer)
{
    timer->PWMDTCTL = 0x0UL;
}

void TPWM_EnableCounter(TIMER_T *timer)
{
    timer->PWMCTL |= TIMER_PWMCTL_CNTEN_Msk;
}

void TPWM_DisableCounter(TIMER_T *timer)
{
    timer->PWMCTL &= ~TIMER_PWMCTL_CNTEN_Msk;
}

void TPWM_EnableTriggerADC(TIMER_T *timer, uint32_t u32Condition)
{
    timer->PWMEADCTS = TIMER_PWMEADCTS_TRGEN_Msk | u32Condition;
}

void TPWM_DisableTriggerADC(TIMER_T *timer)
{
    timer->PWMEADCTS = 0x0UL;
}

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);
}

void TPWM_EnableFaultBrakeInt(TIMER_T *timer, uint32_t u32IntSource)
{
    timer->PWMINTEN1 |= u32IntSource;
}

void TPWM_DisableFaultBrakeInt(TIMER_T *timer, uint32_t u32IntSource)
{
    timer->PWMINTEN1 &= ~u32IntSource;
}

uint32_t TPWM_GetFaultBrakeIntFlag(TIMER_T *timer, uint32_t u32IntSource)
{
    return ((timer->PWMINTSTS1 & (0x3UL << u32IntSource))? 1UL : 0UL);
}

void TPWM_ClearFaultBrakeIntFlag(TIMER_T *timer, uint32_t u32IntSource)
{
    timer->PWMINTSTS1 = (0x3UL << u32IntSource);
}

void TPWM_SetLoadMode(TIMER_T *timer, uint32_t u32LoadMode)
{
    timer->PWMCTL = (timer->PWMCTL & ~(TIMER_PWMCTL_IMMLDEN_Msk | TIMER_PWMCTL_CTRLD_Msk)) | u32LoadMode;
}

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;
}

void TPWM_DisableBrakePinDebounce(TIMER_T *timer)
{
    timer->PWMBNF &= ~TIMER_PWMBNF_BRKNFEN_Msk;
}


void TPWM_EnableBrakePinInverse(TIMER_T *timer)
{
    timer->PWMBNF |= TIMER_PWMBNF_BRKPINV_Msk;
}

void TPWM_DisableBrakePinInverse(TIMER_T *timer)
{
    timer->PWMBNF &= ~TIMER_PWMBNF_BRKPINV_Msk;
}

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 TIMER_PWM_EXPORTED_FUNCTIONS */
 /* end of group TIMER_PWM_Driver */
 /* end of group Standard_Driver */

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