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/**************************************************************************//**
* @file qei.c
* @version V3.00
* @brief Enhanced Quadrature Encoder Interface (EQEI) driver source file
*
* SPDX-License-Identifier: Apache-2.0
* @copyright (C) 2021 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "NuMicro.h"
/** @addtogroup Standard_Driver Standard Driver
@{
*/
/** @addtogroup EQEI_Driver EQEI Driver
@{
*/
/** @addtogroup EQEI_EXPORTED_FUNCTIONS EQEI Exported Functions
@{
*/
/**
* @brief Close EQEI function
* @param[in] eqei The pointer of the specified EQEI module.
* @return None
* @details This function reset EQEI configuration and stop EQEI counting.
*/
void EQEI_Close(EQEI_T *eqei)
{
/* Reset EQEI configuration */
eqei->CTL = (uint32_t)0;
}
/**
* @brief Disable EQEI interrupt
* @param[in] eqei The pointer of the specified EQEI module.
* @param[in] u32IntSel Interrupt type selection.
* - \ref EQEI_CTL_DIRIEN_Msk : Direction change interrupt
* - \ref EQEI_CTL_OVUNIEN_Msk : Counter overflow or underflow interrupt
* - \ref EQEI_CTL_CMPIEN_Msk : Compare-match interrupt
* - \ref EQEI_CTL_IDXIEN_Msk : Index detected interrupt
* @return None
* @details This function disable EQEI specified interrupt.
*/
void EQEI_DisableInt(EQEI_T *eqei, uint32_t u32IntSel)
{
/* Disable EQEI specified interrupt */
EQEI_DISABLE_INT(eqei, u32IntSel);
/* Disable NVIC EQEI IRQ */
if (eqei == (EQEI_T *)EQEI0)
{
NVIC_DisableIRQ((IRQn_Type)EQEI0_IRQn);
}
else if (eqei == (EQEI_T *)EQEI1)
{
NVIC_DisableIRQ((IRQn_Type)EQEI1_IRQn);
}
else if (eqei == (EQEI_T *)EQEI2)
{
NVIC_DisableIRQ((IRQn_Type)EQEI2_IRQn);
}
else
{
NVIC_DisableIRQ((IRQn_Type)EQEI3_IRQn);
}
}
/**
* @brief Enable EQEI interrupt
* @param[in] eqei The pointer of the specified EQEI module.
* @param[in] u32IntSel Interrupt type selection.
* - \ref EQEI_CTL_DIRIEN_Msk : Direction change interrupt
* - \ref EQEI_CTL_OVUNIEN_Msk : Counter overflow or underflow interrupt
* - \ref EQEI_CTL_CMPIEN_Msk : Compare-match interrupt
* - \ref EQEI_CTL_IDXIEN_Msk : Index detected interrupt
* @return None
* @details This function enable EQEI specified interrupt.
*/
void EQEI_EnableInt(EQEI_T *eqei, uint32_t u32IntSel)
{
/* Enable EQEI specified interrupt */
EQEI_ENABLE_INT(eqei, u32IntSel);
/* Enable NVIC EQEI IRQ */
if (eqei == (EQEI_T *)EQEI0)
{
NVIC_EnableIRQ(EQEI0_IRQn);
}
else if (eqei == (EQEI_T *)EQEI1)
{
NVIC_EnableIRQ(EQEI1_IRQn);
}
else if (eqei == (EQEI_T *)EQEI2)
{
NVIC_EnableIRQ(EQEI2_IRQn);
}
else
{
NVIC_EnableIRQ(EQEI3_IRQn);
}
}
/**
* @brief Open EQEI in specified mode and enable input
* @param[in] eqei The pointer of the specified EQEI module.
* @param[in] u32Mode EQEI counting mode.
* - \ref EQEI_CTL_X4_FREE_COUNTING_MODE
* - \ref EQEI_CTL_X2_FREE_COUNTING_MODE
* - \ref EQEI_CTL_X4_COMPARE_COUNTING_MODE
* - \ref EQEI_CTL_X2_COMPARE_COUNTING_MODE
* - \ref EQEI_CTL_PHASE_COUNTING_MODE_TYPE1
* - \ref EQEI_CTL_PHASE_COUNTING_MODE_TYPE2
* - \ref EQEI_CTL_DIRECTIONAL_COUNTING_MODE
* @param[in] u32Value The counter maximum value in compare-counting mode.
* @return None
* @details This function set EQEI in specified mode and enable input.
*/
void EQEI_Open(EQEI_T *eqei, uint32_t u32Mode, uint32_t u32Value)
{
/* Set EQEI function configuration */
/* Set EQEI counting mode */
/* Enable IDX, QEA and QEB input to EQEI controller */
eqei->CTL = (eqei->CTL & (~EQEI_CTL_MODE_Msk)) | ((u32Mode) | EQEI_CTL_CHAEN_Msk | EQEI_CTL_CHBEN_Msk | EQEI_CTL_IDXEN_Msk);
/* Set EQEI maximum count value in in compare-counting mode */
eqei->CNTMAX = u32Value;
}
/**
* @brief Start EQEI function
* @param[in] eqei The pointer of the specified EQEI module.
* @return None
* @details This function enable EQEI function and start EQEI counting.
*/
void EQEI_Start(EQEI_T *eqei)
{
/* Enable EQEI controller function */
eqei->CTL |= EQEI_CTL_QEIEN_Msk;
}
/**
* @brief Stop EQEI function
* @param[in] eqei The pointer of the specified EQEI module.
* @return None
* @details This function disable EQEI function and stop EQEI counting.
*/
void EQEI_Stop(EQEI_T *eqei)
{
/* Disable EQEI controller function */
eqei->CTL &= (~EQEI_CTL_QEIEN_Msk);
}
/*@}*/ /* end of group EQEI_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group EQEI_Driver */
/*@}*/ /* end of group Standard_Driver */
/*** (C) COPYRIGHT 2021 Nuvoton Technology Corp. ***/
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