144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
/**************************************************************************//**
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* @file qei.c
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* @version V3.00
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* @brief Quadrature Encoder Interface (QEI) driver source file
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*
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* @copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.
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*****************************************************************************/
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#include "NuMicro.h"
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/** @addtogroup Standard_Driver Standard Driver
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@{
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*/
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/** @addtogroup QEI_Driver QEI Driver
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@{
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*/
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/** @addtogroup QEI_EXPORTED_FUNCTIONS QEI Exported Functions
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@{
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*/
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/**
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* @brief Close QEI function
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* @param[in] qei The pointer of the specified QEI module.
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* @return None
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* @details This function reset QEI configuration and stop QEI counting.
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*/
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void QEI_Close(QEI_T* qei)
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{
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/* Reset QEI configuration */
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qei->CTL = (uint32_t)0;
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}
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/**
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* @brief Disable QEI interrupt
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* @param[in] qei The pointer of the specified QEI module.
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* @param[in] u32IntSel Interrupt type selection.
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* - \ref QEI_CTL_DIRIEN_Msk : Direction change interrupt
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* - \ref QEI_CTL_OVUNIEN_Msk : Counter overflow or underflow interrupt
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* - \ref QEI_CTL_CMPIEN_Msk : Compare-match interrupt
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* - \ref QEI_CTL_IDXIEN_Msk : Index detected interrupt
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* @return None
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* @details This function disable QEI specified interrupt.
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*/
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void QEI_DisableInt(QEI_T* qei, uint32_t u32IntSel)
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{
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/* Disable QEI specified interrupt */
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QEI_DISABLE_INT(qei, u32IntSel);
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/* Disable NVIC QEI IRQ */
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if(qei ==(QEI_T*)QEI0)
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{
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NVIC_DisableIRQ((IRQn_Type)QEI0_IRQn);
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}
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else
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{
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NVIC_DisableIRQ((IRQn_Type)QEI1_IRQn);
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}
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}
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/**
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* @brief Enable QEI interrupt
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* @param[in] qei The pointer of the specified QEI module.
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* @param[in] u32IntSel Interrupt type selection.
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* - \ref QEI_CTL_DIRIEN_Msk : Direction change interrupt
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* - \ref QEI_CTL_OVUNIEN_Msk : Counter overflow or underflow interrupt
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* - \ref QEI_CTL_CMPIEN_Msk : Compare-match interrupt
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* - \ref QEI_CTL_IDXIEN_Msk : Index detected interrupt
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* @return None
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* @details This function enable QEI specified interrupt.
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*/
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void QEI_EnableInt(QEI_T* qei, uint32_t u32IntSel)
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{
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/* Enable QEI specified interrupt */
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QEI_ENABLE_INT(qei, u32IntSel);
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/* Enable NVIC QEI IRQ */
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if(qei == (QEI_T*)QEI0)
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{
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NVIC_EnableIRQ(QEI0_IRQn);
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}
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else
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{
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NVIC_EnableIRQ(QEI1_IRQn);
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}
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}
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/**
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* @brief Open QEI in specified mode and enable input
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* @param[in] qei The pointer of the specified QEI module.
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* @param[in] u32Mode QEI counting mode.
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* - \ref QEI_CTL_X4_FREE_COUNTING_MODE
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* - \ref QEI_CTL_X2_FREE_COUNTING_MODE
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* - \ref QEI_CTL_X4_COMPARE_COUNTING_MODE
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* - \ref QEI_CTL_X2_COMPARE_COUNTING_MODE
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* @param[in] u32Value The counter maximum value in compare-counting mode.
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* @return None
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* @details This function set QEI in specified mode and enable input.
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*/
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void QEI_Open(QEI_T* qei, uint32_t u32Mode, uint32_t u32Value)
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{
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/* Set QEI function configuration */
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/* Set QEI counting mode */
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/* Enable IDX, QEA and QEB input to QEI controller */
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qei->CTL = (qei->CTL & (~QEI_CTL_MODE_Msk)) | ((u32Mode) | QEI_CTL_CHAEN_Msk | QEI_CTL_CHBEN_Msk | QEI_CTL_IDXEN_Msk);
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/* Set QEI maximum count value in in compare-counting mode */
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qei->CNTMAX = u32Value;
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}
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/**
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* @brief Start QEI function
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* @param[in] qei The pointer of the specified QEI module.
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* @return None
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* @details This function enable QEI function and start QEI counting.
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*/
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void QEI_Start(QEI_T* qei)
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{
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/* Enable QEI controller function */
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qei->CTL |= QEI_CTL_QEIEN_Msk;
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}
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/**
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* @brief Stop QEI function
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* @param[in] qei The pointer of the specified QEI module.
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* @return None
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* @details This function disable QEI function and stop QEI counting.
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*/
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void QEI_Stop(QEI_T* qei)
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{
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/* Disable QEI controller function */
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qei->CTL &= (~QEI_CTL_QEIEN_Msk);
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}
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/*@}*/ /* end of group QEI_EXPORTED_FUNCTIONS */
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/*@}*/ /* end of group QEI_Driver */
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/*@}*/ /* end of group Standard_Driver */
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/*** (C) COPYRIGHT 2016 Nuvoton Technology Corp. ***/
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