lpc17xx_pwm.c

uCOSII_lwip_lpc1768

*                    specified PWM match function.
 * @return 		None
 **********************************************************************/
void PWM_ConfigMatch(LPC_PWM_TypeDef *PWMx, PWM_MATCHCFG_Type *PWM_MatchConfigStruct)
{
	CHECK_PARAM(PARAM_PWMx(PWMx));
	CHECK_PARAM(PARAM_PWM1_MATCH_CHANNEL(PWM_MatchConfigStruct->MatchChannel));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_MatchConfigStruct->IntOnMatch));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_MatchConfigStruct->ResetOnMatch));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_MatchConfigStruct->StopOnMatch));

	//interrupt on MRn
	if (PWM_MatchConfigStruct->IntOnMatch == ENABLE)
	{
		PWMx->MCR |= PWM_MCR_INT_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
	}
	else
	{
		PWMx->MCR &= (~PWM_MCR_INT_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
					& PWM_MCR_BITMASK;
	}

	//reset on MRn
	if (PWM_MatchConfigStruct->ResetOnMatch == ENABLE)
	{
		PWMx->MCR |= PWM_MCR_RESET_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
	}
	else
	{
		PWMx->MCR &= (~PWM_MCR_RESET_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
					& PWM_MCR_BITMASK;
	}

	//stop on MRn
	if (PWM_MatchConfigStruct->StopOnMatch == ENABLE)
	{
		PWMx->MCR |= PWM_MCR_STOP_ON_MATCH(PWM_MatchConfigStruct->MatchChannel);
	}
	else
	{
		PWMx->MCR &= (~PWM_MCR_STOP_ON_MATCH(PWM_MatchConfigStruct->MatchChannel)) \
					& PWM_MCR_BITMASK;
	}
}


/*********************************************************************//**
 * @brief 		Configures capture input for PWM peripheral
 * @param[in]	PWMx	PWM peripheral selected, should be LPC_PWM1
 * @param[in]   PWM_CaptureConfigStruct	Pointer to a PWM_CAPTURECFG_Type structure
*                    that contains the configuration information for the
*                    specified PWM capture input function.
 * @return 		None
 **********************************************************************/
void PWM_ConfigCapture(LPC_PWM_TypeDef *PWMx, PWM_CAPTURECFG_Type *PWM_CaptureConfigStruct)
{
	CHECK_PARAM(PARAM_PWMx(PWMx));
	CHECK_PARAM(PARAM_PWM1_CAPTURE_CHANNEL(PWM_CaptureConfigStruct->CaptureChannel));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_CaptureConfigStruct->FallingEdge));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_CaptureConfigStruct->IntOnCaption));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(PWM_CaptureConfigStruct->RisingEdge));

	if (PWM_CaptureConfigStruct->RisingEdge == ENABLE)
	{
		PWMx->CCR |= PWM_CCR_CAP_RISING(PWM_CaptureConfigStruct->CaptureChannel);
	}
	else
	{
		PWMx->CCR &= (~PWM_CCR_CAP_RISING(PWM_CaptureConfigStruct->CaptureChannel)) \
					& PWM_CCR_BITMASK;
	}

	if (PWM_CaptureConfigStruct->FallingEdge == ENABLE)
	{
		PWMx->CCR |= PWM_CCR_CAP_FALLING(PWM_CaptureConfigStruct->CaptureChannel);
	}
	else
	{
		PWMx->CCR &= (~PWM_CCR_CAP_FALLING(PWM_CaptureConfigStruct->CaptureChannel)) \
					& PWM_CCR_BITMASK;
	}

	if (PWM_CaptureConfigStruct->IntOnCaption == ENABLE)
	{
		PWMx->CCR |= PWM_CCR_INT_ON_CAP(PWM_CaptureConfigStruct->CaptureChannel);
	}
	else
	{
		PWMx->CCR &= (~PWM_CCR_INT_ON_CAP(PWM_CaptureConfigStruct->CaptureChannel)) \
					& PWM_CCR_BITMASK;
	}
}


/*********************************************************************//**
 * @brief 		Read value of capture register PWM peripheral
 * @param[in]	PWMx	PWM peripheral selected, should be LPC_PWM1
 * @param[in]	CaptureChannel: capture channel number, should be in
 * 				range 0 to 1
 * @return 		Value of capture register
 **********************************************************************/
uint32_t PWM_GetCaptureValue(LPC_PWM_TypeDef *PWMx, uint8_t CaptureChannel)
{
	CHECK_PARAM(PARAM_PWMx(PWMx));
	CHECK_PARAM(PARAM_PWM1_CAPTURE_CHANNEL(CaptureChannel));

	switch (CaptureChannel)
	{
	case 0:
		return PWMx->CR0;

	case 1:
		return PWMx->CR1;

	default:
		return (0);
	}
}


/********************************************************************//**
 * @brief 		Update value for each PWM channel with update type option
 * @param[in]	PWMx	PWM peripheral selected, should be LPC_PWM1
 * @param[in]	MatchChannel Match channel
 * @param[in]	MatchValue Match value
 * @param[in]	UpdateType Type of Update, should be:
 * 				- PWM_MATCH_UPDATE_NOW: The update value will be updated for
 * 					this channel immediately
 * 				- PWM_MATCH_UPDATE_NEXT_RST: The update value will be updated for
 * 					this channel on next reset by a PWM Match event.
 * @return		None
 *********************************************************************/
void PWM_MatchUpdate(LPC_PWM_TypeDef *PWMx, uint8_t MatchChannel, \
					uint32_t MatchValue, uint8_t UpdateType)
{
	CHECK_PARAM(PARAM_PWMx(PWMx));
	CHECK_PARAM(PARAM_PWM1_MATCH_CHANNEL(MatchChannel));
	CHECK_PARAM(PARAM_PWM_MATCH_UPDATE(UpdateType));

	switch (MatchChannel)
	{
	case 0:
		PWMx->MR0 = MatchValue;
		break;

	case 1:
		PWMx->MR1 = MatchValue;
		break;

	case 2:
		PWMx->MR2 = MatchValue;
		break;

	case 3:
		PWMx->MR3 = MatchValue;
		break;

	case 4:
		PWMx->MR4 = MatchValue;
		break;

	case 5:
		PWMx->MR5 = MatchValue;
		break;

	case 6:
		PWMx->MR6 = MatchValue;
		break;
	}

	// Write Latch register
	PWMx->LER |= PWM_LER_EN_MATCHn_LATCH(MatchChannel);

	// In case of update now
	if (UpdateType == PWM_MATCH_UPDATE_NOW)
	{
		PWMx->TCR |= PWM_TCR_COUNTER_RESET;
		PWMx->TCR &= (~PWM_TCR_COUNTER_RESET) & PWM_TCR_BITMASK;
	}
}

/********************************************************************//**
 * @brief 		Update value for multi PWM channel with update type option
 * 				at the same time
 * @param[in]	PWMx	PWM peripheral selected, should be LPC_PWM1
 * @param[in]	MatchStruct Structure that contents match value of 7 pwm channels
 * @param[in]	UpdateType Type of Update, should be:
 * 				- PWM_MATCH_UPDATE_NOW: The update value will be updated for
 * 					this channel immediately
 * 				- PWM_MATCH_UPDATE_NEXT_RST: The update value will be updated for
 * 					this channel on next reset by a PWM Match event.
 * @return		None
 *********************************************************************/
void PWM_MultiMatchUpdate(LPC_PWM_TypeDef *PWMx, PWM_Match_T *MatchStruct , uint8_t UpdateType)
{
	uint8_t LatchValue = 0;
	uint8_t i;

	CHECK_PARAM(PARAM_PWMx(PWMx));
	CHECK_PARAM(PARAM_PWM_MATCH_UPDATE(UpdateType));

	//Update match value
	for(i=0;i<7;i++)
	{
		if(MatchStruct[i].Status == SET)
		{
			if(i<4)
				*((volatile unsigned int *)(&(PWMx->MR0) + i)) = MatchStruct[i].Matchvalue;
			else
			{
				*((volatile unsigned int *)(&(PWMx->MR4) + (i-4))) = MatchStruct[i].Matchvalue;
			}
			LatchValue |=(1<<i);
		}
	}
	//set update for multi-channel at the same time
	PWMx->LER = LatchValue;

	// In case of update now
	if (UpdateType == PWM_MATCH_UPDATE_NOW)
	{
		PWMx->TCR |= PWM_TCR_COUNTER_RESET;
		PWMx->TCR &= (~PWM_TCR_COUNTER_RESET) & PWM_TCR_BITMASK;
	}
}
/********************************************************************//**
 * @brief 		Configure Edge mode for each PWM channel
 * @param[in]	PWMx	PWM peripheral selected, should be LPC_PWM1
 * @param[in]	PWMChannel PWM channel, should be in range from 2 to 6
 * @param[in]	ModeOption PWM mode option, should be:
 * 				- PWM_CHANNEL_SINGLE_EDGE: Single Edge mode
 * 				- PWM_CHANNEL_DUAL_EDGE: Dual Edge mode
 * @return 		None
 * Note: PWM Channel 1 can not be selected for mode option
 *********************************************************************/
void PWM_ChannelConfig(LPC_PWM_TypeDef *PWMx, uint8_t PWMChannel, uint8_t ModeOption)
{
	CHECK_PARAM(PARAM_PWMx(PWMx));
	CHECK_PARAM(PARAM_PWM1_EDGE_MODE_CHANNEL(PWMChannel));
	CHECK_PARAM(PARAM_PWM_CHANNEL_EDGE(ModeOption));

	// Single edge mode
	if (ModeOption == PWM_CHANNEL_SINGLE_EDGE)
	{
		PWMx->PCR &= (~PWM_PCR_PWMSELn(PWMChannel)) & PWM_PCR_BITMASK;
	}
	// Double edge mode
	else if (PWM_CHANNEL_DUAL_EDGE)
	{
		PWMx->PCR |= PWM_PCR_PWMSELn(PWMChannel);
	}
}



/********************************************************************//**
 * @brief 		Enable/Disable PWM channel output
 * @param[in]	PWMx	PWM peripheral selected, should be LPC_PWM1
 * @param[in]	PWMChannel PWM channel, should be in range from 1 to 6
 * @param[in]	NewState New State of this function, should be:
 * 				- ENABLE: Enable this PWM channel output
 * 				- DISABLE: Disable this PWM channel output
 * @return		None
 *********************************************************************/
void PWM_ChannelCmd(LPC_PWM_TypeDef *PWMx, uint8_t PWMChannel, FunctionalState NewState)
{
	CHECK_PARAM(PARAM_PWMx(PWMx));
	CHECK_PARAM(PARAM_PWM1_CHANNEL(PWMChannel));

	if (NewState == ENABLE)
	{
		PWMx->PCR |= PWM_PCR_PWMENAn(PWMChannel);
	}
	else
	{
		PWMx->PCR &= (~PWM_PCR_PWMENAn(PWMChannel)) & PWM_PCR_BITMASK;
	}
}

/**
 * @}
 */

#endif /* _PWM */

/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */