Moving sam3s peripheral library to more global sam library

2025-07-30 16:24:09 +03:00 · 2011-06-21 00:42:25 +02:00
parent 61c55be1cb
commit 7c708132c1
107 changed files with 0 additions and 0 deletions
--- a/hardware/sam/system/libsam/source/acc.c
+++ b/hardware/sam/system/libsam/source/acc.c
@ -0,0 +1,162 @@
+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2009, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+/** \addtogroup acc_module Working with ACC
+ * The ACC driver provides the interface to configure and use the ACC peripheral.\n
+ *
+ * It applies comparison on two inputs and gives a compare output.
+ *
+ * To Enable a ACC Comparison,the user has to follow these few steps:
+ * <ul>
+ * <li> Enable ACC peripheral clock by setting the corresponding bit in PMC_PCER1
+ *      (PMC Peripheral Clock Enable Register 1)
+ * </li>
+ * <li> Reset the controller by asserting ACC_CR_SWRST in ACC_CR(ACC Control Register)
+ </li>
+ * <li> Configure the mode as following steps:  </li>
+ * -#   Select inputs for SELMINUS and SELPLUS in ACC_MR (ACC Mode Register).
+ * -#   Enable Analog Comparator by setting ACEN in ACC_MR.
+ * -#   Configure Edge Type to detect different compare output.
+ * </li>
+ * <li> Wait until the automatic mask period expires by polling MASK bit in
+ *      ACC_ISR.
+ * </ul>
+ *
+ * For more accurate information, please look at the ACC section of the
+ * Datasheet.
+ *
+ * Related files :\n
+ * \ref acc.c\n
+ * \ref acc.h\n
+ */
+/*@{*/
+/*@}*/
+/**
+ * \file
+ *
+ * Implementation of Analog Comparator Controller (ACC).
+ *
+ */
+/*----------------------------------------------------------------------------
+ *        Headers
+ *----------------------------------------------------------------------------*/
+
+#include "chip.h"
+
+/*----------------------------------------------------------------------------
+ *        Exported functions
+ *----------------------------------------------------------------------------*/
+
+/**
+ * \brief Initialize the ACC controller
+ *
+ * \param pAcc Pointer to an Acc instance.
+ * \param idAcc ACC identifier
+ * \param ucSelplus input connected to inp, 0~7
+ * \param ucSelminus input connected to inm,0~7
+ * \param wAc_en Analog comprator enabled/disabled
+ * \param wEdge CF flag triggering mode
+ * \param wInvert INVert comparator output,use pattern defined in the device header file
+ */
+extern void ACC_Configure( Acc *pAcc, uint8_t idAcc, uint8_t ucSelplus, uint8_t ucSelminus,
+                           uint16_t wAc_en, uint16_t wEdge, uint16_t wInvert )
+{
+    /* Enable peripheral clock*/
+    PMC->PMC_PCER1 = 1 << (idAcc - 32) ;
+
+    /*  Reset the controller */
+    pAcc->ACC_CR |= ACC_CR_SWRST ;
+
+    /*  Write to the MR register */
+    ACC_CfgModeReg( pAcc,
+                    ( (ucSelplus<<ACC_MR_SELPLUS_Pos) & ACC_MR_SELPLUS_Msk ) |
+                    ( (ucSelminus<<ACC_MR_SELMINUS_Pos) & ACC_MR_SELMINUS_Msk ) |
+                    ( (wAc_en<<8) & ACC_MR_ACEN ) |
+                    ( (wEdge<<ACC_MR_EDGETYP_Pos) & ACC_MR_EDGETYP_Msk ) |
+                    ( (wInvert<<12) & ACC_MR_INV ) ) ;
+    /* set hysteresis and current option*/
+    pAcc->ACC_ACR = (ACC_ACR_ISEL_HISP | ((0x01 << ACC_ACR_HYST_Pos) & ACC_ACR_HYST_Msk));
+
+    /* Automatic Output Masking Period*/
+    while ( pAcc->ACC_ISR & (uint32_t)ACC_ISR_MASK ) ;
+}
+
+/**
+ * Return the Channel Converted Data
+ * \param pAcc Pointer to an Acc instance.
+ * \param selplus input applied on ACC SELPLUS
+ * \param selminus input applied on ACC SELMINUS
+ */
+extern void ACC_SetComparisionPair( Acc *pAcc, uint8_t ucSelplus, uint8_t ucSelminus )
+{
+    uint32_t dwTemp ;
+
+    assert( ucSelplus < 8 && ucSelminus < 8 ) ;
+
+    dwTemp = pAcc->ACC_MR ;
+
+    pAcc->ACC_MR = dwTemp & (uint32_t) ((~ACC_MR_SELMINUS_Msk) & (~ACC_MR_SELPLUS_Msk));
+
+    pAcc->ACC_MR |= ( ((ucSelplus << ACC_MR_SELPLUS_Pos) & ACC_MR_SELPLUS_Msk) |
+                      ((ucSelminus << ACC_MR_SELMINUS_Pos) & ACC_MR_SELMINUS_Msk) ) ;
+
+}
+/**
+ * Return Comparison Result
+ * \param pAcc Pointer to an Acc instance.
+ * \param status value of ACC_ISR
+ */
+extern uint32_t ACC_GetComparisionResult( Acc *pAcc, uint32_t dwStatus )
+{
+    uint32_t dwTemp = pAcc->ACC_MR ;
+
+    if ( (dwTemp & ACC_MR_INV) == ACC_MR_INV )
+    {
+        if ( dwStatus & ACC_ISR_SCO )
+        {
+            return 0 ; /* inn>inp*/
+        }
+        else
+        {
+            return 1 ;/* inp>inn*/
+        }
+    }
+    else
+    {
+        if ( dwStatus & ACC_ISR_SCO )
+        {
+            return 1 ; /* inp>inn*/
+        }
+        else
+        {
+            return 0 ;/* inn>inp*/
+        }
+    }
+}
+