Import Mbed OS hard-float snapshot

targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_acmp.c

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+/**************************************************************************//**
+ * @file     acmp.c
+ * @version  V3.00
+ * $Revision: 4 $
+ * $Date: 15/08/11 10:26a $
+ * @brief    M451 series Analog Comparator(ACMP) driver source file
+ *
+ * @note
+ * Copyright (C) 2014~2015 Nuvoton Technology Corp. All rights reserved.
+*****************************************************************************/
+
+#include "M451Series.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/** @addtogroup Standard_Driver Standard Driver
+  @{
+*/
+
+/** @addtogroup ACMP_Driver ACMP Driver
+  @{
+*/
+
+
+/** @addtogroup ACMP_EXPORTED_FUNCTIONS ACMP Exported Functions
+  @{
+*/
+
+
+/**
+  * @brief  Configure the specified ACMP module
+  *
+  * @param[in]  Acmp The pointer of the specified ACMP module
+  * @param[in]  u32ChNum Comparator number.
+  * @param[in]  u32NegSrc Comparator negative input selection.  Including:
+  *                  - \ref ACMP_CTL_NEGSEL_PIN
+  *                  - \ref ACMP_CTL_NEGSEL_CRV
+  *                  - \ref ACMP_CTL_NEGSEL_VBG
+  *                  - \ref ACMP_CTL_NEGSEL_DAC
+  * @param[in]  u32HysteresisEn The hysteresis function option. Including:
+  *                  - \ref ACMP_CTL_HYSTERESIS_ENABLE
+  *                  - \ref ACMP_CTL_HYSTERESIS_DISABLE
+  *
+  * @return     None
+  *
+  * @details    Configure hysteresis function, select the source of negative input and enable analog comparator.
+  */
+void ACMP_Open(ACMP_T *Acmp, uint32_t u32ChNum, uint32_t u32NegSrc, uint32_t u32HysteresisEn)
+{
+    Acmp->CTL[u32ChNum] = (Acmp->CTL[u32ChNum] & (~(ACMP_CTL_NEGSEL_Msk | ACMP_CTL_HYSEN_Msk))) | (u32NegSrc | u32HysteresisEn | ACMP_CTL_ACMPEN_Msk);
+}
+
+/**
+  * @brief  Close analog comparator
+  *
+  * @param[in]  Acmp The pointer of the specified ACMP module
+  * @param[in]  u32ChNum Comparator number.
+  *
+  * @return     None
+  *
+  * @details  This function will clear ACMPEN bit of ACMP_CTL register to disable analog comparator.
+  */
+void ACMP_Close(ACMP_T *Acmp, uint32_t u32ChNum)
+{
+    Acmp->CTL[u32ChNum] &= (~ACMP_CTL_ACMPEN_Msk);
+}
+
+
+
+/*@}*/ /* end of group ACMP_EXPORTED_FUNCTIONS */
+
+/*@}*/ /* end of group ACMP_Driver */
+
+/*@}*/ /* end of group Standard_Driver */
+
+#ifdef __cplusplus
+}
+#endif
+
+/*** (C) COPYRIGHT 2014~2015 Nuvoton Technology Corp. ***/
+