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/**************************************************************************//**
* @file qei.c
* @brief Quadrature Encoder Interface (QEI) driver source file
*
* SPDX-License-Identifier: Apache-2.0
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "NuMicro.h"
/** @addtogroup Standard_Driver Standard Driver
@{
*/
/** @addtogroup QEI_Driver QEI Driver
@{
*/
/** @addtogroup QEI_EXPORTED_FUNCTIONS QEI Exported Functions
@{
*/
/**
* @brief Close QEI function
* @param[in] qei The pointer of the specified QEI module.
* @return None
* @details This function reset QEI configuration and stop QEI counting.
*/
void QEI_Close(QEI_T *qei)
{
/* Reset QEI configuration */
qei->CTL = (uint32_t)0;
}
/**
* @brief Disable QEI interrupt
* @param[in] qei The pointer of the specified QEI module.
* @param[in] u32IntSel Interrupt type selection.
* - \ref QEI_CTL_DIRIEN_Msk : Direction change interrupt
* - \ref QEI_CTL_OVUNIEN_Msk : Counter overflow or underflow interrupt
* - \ref QEI_CTL_CMPIEN_Msk : Compare-match interrupt
* - \ref QEI_CTL_IDXIEN_Msk : Index detected interrupt
* @return None
* @details This function disable QEI specified interrupt.
*/
void QEI_DisableInt(QEI_T *qei, uint32_t u32IntSel)
{
/* Disable QEI specified interrupt */
QEI_DISABLE_INT(qei, u32IntSel);
}
/**
* @brief Enable QEI interrupt
* @param[in] qei The pointer of the specified QEI module.
* @param[in] u32IntSel Interrupt type selection.
* - \ref QEI_CTL_DIRIEN_Msk : Direction change interrupt
* - \ref QEI_CTL_OVUNIEN_Msk : Counter overflow or underflow interrupt
* - \ref QEI_CTL_CMPIEN_Msk : Compare-match interrupt
* - \ref QEI_CTL_IDXIEN_Msk : Index detected interrupt
* @return None
* @details This function enable QEI specified interrupt.
*/
void QEI_EnableInt(QEI_T *qei, uint32_t u32IntSel)
{
/* Enable QEI specified interrupt */
QEI_ENABLE_INT(qei, u32IntSel);
}
/**
* @brief Open QEI in specified mode and enable input
* @param[in] qei The pointer of the specified QEI module.
* @param[in] u32Mode QEI counting mode.
* - \ref QEI_CTL_X4_FREE_COUNTING_MODE
* - \ref QEI_CTL_X2_FREE_COUNTING_MODE
* - \ref QEI_CTL_X4_COMPARE_COUNTING_MODE
* - \ref QEI_CTL_X2_COMPARE_COUNTING_MODE
* @param[in] u32Value The counter maximum value in compare-counting mode.
* @return None
* @details This function set QEI in specified mode and enable input.
*/
void QEI_Open(QEI_T *qei, uint32_t u32Mode, uint32_t u32Value)
{
/* Set QEI function configuration */
/* Set QEI counting mode */
/* Enable IDX, QEA and QEB input to QEI controller */
qei->CTL = (qei->CTL & (~QEI_CTL_MODE_Msk)) | ((u32Mode) | QEI_CTL_CHAEN_Msk | QEI_CTL_CHBEN_Msk | QEI_CTL_IDXEN_Msk);
/* Set QEI maximum count value in in compare-counting mode */
qei->CNTMAX = u32Value;
}
/**
* @brief Start QEI function
* @param[in] qei The pointer of the specified QEI module.
* @return None
* @details This function enable QEI function and start QEI counting.
*/
void QEI_Start(QEI_T *qei)
{
/* Enable QEI controller function */
qei->CTL |= QEI_CTL_QEIEN_Msk;
}
/**
* @brief Stop QEI function
* @param[in] qei The pointer of the specified QEI module.
* @return None
* @details This function disable QEI function and stop QEI counting.
*/
void QEI_Stop(QEI_T *qei)
{
/* Disable QEI controller function */
qei->CTL &= (~QEI_CTL_QEIEN_Msk);
}
/*@}*/ /* end of group QEI_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group QEI_Driver */
/*@}*/ /* end of group Standard_Driver */
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