181 lines
5.0 KiB
C
181 lines
5.0 KiB
C
/*******************************************************************************
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* File Name: SDCard_PM.c
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* Version 2.40
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*
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* Description:
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* This file contains the setup, control and status commands to support
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* component operations in low power mode.
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*
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* Note:
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*
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********************************************************************************
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* Copyright 2008-2012, Cypress Semiconductor Corporation. All rights reserved.
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* You may use this file only in accordance with the license, terms, conditions,
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* disclaimers, and limitations in the end user license agreement accompanying
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* the software package with which this file was provided.
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*******************************************************************************/
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#include "SDCard_PVT.h"
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static SDCard_BACKUP_STRUCT SDCard_backup =
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{
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SDCard_DISABLED,
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SDCard_BITCTR_INIT,
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#if(CY_UDB_V0)
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SDCard_TX_INIT_INTERRUPTS_MASK,
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SDCard_RX_INIT_INTERRUPTS_MASK
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#endif /* CY_UDB_V0 */
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};
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/*******************************************************************************
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* Function Name: SDCard_SaveConfig
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********************************************************************************
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*
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* Summary:
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* Saves SPIM configuration.
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*
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* Parameters:
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* None.
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*
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* Return:
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* None.
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*
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* Global Variables:
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* SDCard_backup - modified when non-retention registers are saved.
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*
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* Reentrant:
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* No.
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*
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*******************************************************************************/
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void SDCard_SaveConfig(void)
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{
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/* Store Status Mask registers */
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#if(CY_UDB_V0)
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SDCard_backup.cntrPeriod = SDCard_COUNTER_PERIOD_REG;
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SDCard_backup.saveSrTxIntMask = SDCard_TX_STATUS_MASK_REG;
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SDCard_backup.saveSrRxIntMask = SDCard_RX_STATUS_MASK_REG;
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#endif /* (CY_UDB_V0) */
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}
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/*******************************************************************************
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* Function Name: SDCard_RestoreConfig
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********************************************************************************
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*
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* Summary:
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* Restores SPIM configuration.
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*
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* Parameters:
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* None.
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*
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* Return:
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* None.
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*
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* Global Variables:
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* SDCard_backup - used when non-retention registers are restored.
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*
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* Side Effects:
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* If this API is called without first calling SaveConfig then in the following
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* registers will be default values from Customizer:
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* SDCard_STATUS_MASK_REG and SDCard_COUNTER_PERIOD_REG.
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*
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*******************************************************************************/
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void SDCard_RestoreConfig(void)
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{
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/* Restore the data, saved by SaveConfig() function */
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#if(CY_UDB_V0)
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SDCard_COUNTER_PERIOD_REG = SDCard_backup.cntrPeriod;
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SDCard_TX_STATUS_MASK_REG = ((uint8) SDCard_backup.saveSrTxIntMask);
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SDCard_RX_STATUS_MASK_REG = ((uint8) SDCard_backup.saveSrRxIntMask);
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#endif /* (CY_UDB_V0) */
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}
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/*******************************************************************************
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* Function Name: SDCard_Sleep
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********************************************************************************
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*
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* Summary:
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* Prepare SPIM Component goes to sleep.
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*
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* Parameters:
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* None.
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*
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* Return:
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* None.
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*
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* Global Variables:
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* SDCard_backup - modified when non-retention registers are saved.
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*
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* Reentrant:
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* No.
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*
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*******************************************************************************/
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void SDCard_Sleep(void)
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{
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/* Save components enable state */
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SDCard_backup.enableState = ((uint8) SDCard_IS_ENABLED);
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SDCard_Stop();
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SDCard_SaveConfig();
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}
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/*******************************************************************************
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* Function Name: SDCard_Wakeup
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********************************************************************************
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*
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* Summary:
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* Prepare SPIM Component to wake up.
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*
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* Parameters:
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* None.
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*
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* Return:
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* None.
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*
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* Global Variables:
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* SDCard_backup - used when non-retention registers are restored.
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* SDCard_txBufferWrite - modified every function call - resets to
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* zero.
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* SDCard_txBufferRead - modified every function call - resets to
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* zero.
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* SDCard_rxBufferWrite - modified every function call - resets to
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* zero.
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* SDCard_rxBufferRead - modified every function call - resets to
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* zero.
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*
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* Reentrant:
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* No.
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*
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*******************************************************************************/
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void SDCard_Wakeup(void)
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{
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SDCard_RestoreConfig();
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#if(SDCard_RX_SOFTWARE_BUF_ENABLED)
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SDCard_rxBufferFull = 0u;
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SDCard_rxBufferRead = 0u;
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SDCard_rxBufferWrite = 0u;
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#endif /* (SDCard_RX_SOFTWARE_BUF_ENABLED) */
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#if(SDCard_TX_SOFTWARE_BUF_ENABLED)
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SDCard_txBufferFull = 0u;
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SDCard_txBufferRead = 0u;
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SDCard_txBufferWrite = 0u;
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#endif /* (SDCard_TX_SOFTWARE_BUF_ENABLED) */
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/* Clear any data from the RX and TX FIFO */
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SDCard_ClearFIFO();
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/* Restore components block enable state */
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if(0u != SDCard_backup.enableState)
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{
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SDCard_Enable();
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}
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}
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/* [] END OF FILE */
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