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SCSI2SD/software/SCSI2SD/SCSI2SD.cydsn/Generated_Source/PSoC5/SD.c

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/*******************************************************************************
* File Name: SD.c
* Version 2.40
*
* Description:
* This file provides all API functionality of the SPI Master component.
*
* Note:
* None.
*
********************************************************************************
* Copyright 2008-2012, Cypress Semiconductor Corporation. All rights reserved.
* You may use this file only in accordance with the license, terms, conditions,
* disclaimers, and limitations in the end user license agreement accompanying
* the software package with which this file was provided.
*******************************************************************************/
#include "SD_PVT.h"
#if(SD_TX_SOFTWARE_BUF_ENABLED)
volatile uint8 SD_txBuffer[SD_TX_BUFFER_SIZE] = {0u};
volatile uint8 SD_txBufferFull;
volatile uint8 SD_txBufferRead;
volatile uint8 SD_txBufferWrite;
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED) */
#if(SD_RX_SOFTWARE_BUF_ENABLED)
volatile uint8 SD_rxBuffer[SD_RX_BUFFER_SIZE] = {0u};
volatile uint8 SD_rxBufferFull;
volatile uint8 SD_rxBufferRead;
volatile uint8 SD_rxBufferWrite;
#endif /* (SD_RX_SOFTWARE_BUF_ENABLED) */
uint8 SD_initVar = 0u;
volatile uint8 SD_swStatusTx;
volatile uint8 SD_swStatusRx;
/*******************************************************************************
* Function Name: SD_Init
********************************************************************************
*
* Summary:
* Inits/Restores default SPIM configuration provided with customizer.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Side Effects:
* When this function is called it initializes all of the necessary parameters
* for execution. i.e. setting the initial interrupt mask, configuring the
* interrupt service routine, configuring the bit-counter parameters and
* clearing the FIFO and Status Register.
*
* Reentrant:
* No.
*
*******************************************************************************/
void SD_Init(void)
{
/* Initialize the Bit counter */
SD_COUNTER_PERIOD_REG = SD_BITCTR_INIT;
/* Init TX ISR */
#if(0u != SD_INTERNAL_TX_INT_ENABLED)
CyIntDisable (SD_TX_ISR_NUMBER);
CyIntSetPriority (SD_TX_ISR_NUMBER, SD_TX_ISR_PRIORITY);
(void) CyIntSetVector(SD_TX_ISR_NUMBER, &SD_TX_ISR);
#endif /* (0u != SD_INTERNAL_TX_INT_ENABLED) */
/* Init RX ISR */
#if(0u != SD_INTERNAL_RX_INT_ENABLED)
CyIntDisable (SD_RX_ISR_NUMBER);
CyIntSetPriority (SD_RX_ISR_NUMBER, SD_RX_ISR_PRIORITY);
(void) CyIntSetVector(SD_RX_ISR_NUMBER, &SD_RX_ISR);
#endif /* (0u != SD_INTERNAL_RX_INT_ENABLED) */
/* Clear any stray data from the RX and TX FIFO */
SD_ClearFIFO();
#if(SD_RX_SOFTWARE_BUF_ENABLED)
SD_rxBufferFull = 0u;
SD_rxBufferRead = 0u;
SD_rxBufferWrite = 0u;
#endif /* (SD_RX_SOFTWARE_BUF_ENABLED) */
#if(SD_TX_SOFTWARE_BUF_ENABLED)
SD_txBufferFull = 0u;
SD_txBufferRead = 0u;
SD_txBufferWrite = 0u;
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED) */
(void) SD_ReadTxStatus(); /* Clear Tx status and swStatusTx */
(void) SD_ReadRxStatus(); /* Clear Rx status and swStatusRx */
/* Configure TX and RX interrupt mask */
SD_TX_STATUS_MASK_REG = SD_TX_INIT_INTERRUPTS_MASK;
SD_RX_STATUS_MASK_REG = SD_RX_INIT_INTERRUPTS_MASK;
}
/*******************************************************************************
* Function Name: SD_Enable
********************************************************************************
*
* Summary:
* Enable SPIM component.
*
* Parameters:
* None.
*
* Return:
* None.
*
*******************************************************************************/
void SD_Enable(void)
{
uint8 enableInterrupts;
enableInterrupts = CyEnterCriticalSection();
SD_COUNTER_CONTROL_REG |= SD_CNTR_ENABLE;
SD_TX_STATUS_ACTL_REG |= SD_INT_ENABLE;
SD_RX_STATUS_ACTL_REG |= SD_INT_ENABLE;
CyExitCriticalSection(enableInterrupts);
#if(0u != SD_INTERNAL_CLOCK)
SD_IntClock_Enable();
#endif /* (0u != SD_INTERNAL_CLOCK) */
SD_EnableTxInt();
SD_EnableRxInt();
}
/*******************************************************************************
* Function Name: SD_Start
********************************************************************************
*
* Summary:
* Initialize and Enable the SPI Master component.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Global variables:
* SD_initVar - used to check initial configuration, modified on
* first function call.
*
* Theory:
* Enable the clock input to enable operation.
*
* Reentrant:
* No.
*
*******************************************************************************/
void SD_Start(void)
{
if(0u == SD_initVar)
{
SD_Init();
SD_initVar = 1u;
}
SD_Enable();
}
/*******************************************************************************
* Function Name: SD_Stop
********************************************************************************
*
* Summary:
* Disable the SPI Master component.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Theory:
* Disable the clock input to enable operation.
*
*******************************************************************************/
void SD_Stop(void)
{
uint8 enableInterrupts;
enableInterrupts = CyEnterCriticalSection();
SD_TX_STATUS_ACTL_REG &= ((uint8) ~SD_INT_ENABLE);
SD_RX_STATUS_ACTL_REG &= ((uint8) ~SD_INT_ENABLE);
CyExitCriticalSection(enableInterrupts);
#if(0u != SD_INTERNAL_CLOCK)
SD_IntClock_Disable();
#endif /* (0u != SD_INTERNAL_CLOCK) */
SD_DisableTxInt();
SD_DisableRxInt();
}
/*******************************************************************************
* Function Name: SD_EnableTxInt
********************************************************************************
*
* Summary:
* Enable internal Tx interrupt generation.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Theory:
* Enable the internal Tx interrupt output -or- the interrupt component itself.
*
*******************************************************************************/
void SD_EnableTxInt(void)
{
#if(0u != SD_INTERNAL_TX_INT_ENABLED)
CyIntEnable(SD_TX_ISR_NUMBER);
#endif /* (0u != SD_INTERNAL_TX_INT_ENABLED) */
}
/*******************************************************************************
* Function Name: SD_EnableRxInt
********************************************************************************
*
* Summary:
* Enable internal Rx interrupt generation.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Theory:
* Enable the internal Rx interrupt output -or- the interrupt component itself.
*
*******************************************************************************/
void SD_EnableRxInt(void)
{
#if(0u != SD_INTERNAL_RX_INT_ENABLED)
CyIntEnable(SD_RX_ISR_NUMBER);
#endif /* (0u != SD_INTERNAL_RX_INT_ENABLED) */
}
/*******************************************************************************
* Function Name: SD_DisableTxInt
********************************************************************************
*
* Summary:
* Disable internal Tx interrupt generation.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Theory:
* Disable the internal Tx interrupt output -or- the interrupt component itself.
*
*******************************************************************************/
void SD_DisableTxInt(void)
{
#if(0u != SD_INTERNAL_TX_INT_ENABLED)
CyIntDisable(SD_TX_ISR_NUMBER);
#endif /* (0u != SD_INTERNAL_TX_INT_ENABLED) */
}
/*******************************************************************************
* Function Name: SD_DisableRxInt
********************************************************************************
*
* Summary:
* Disable internal Rx interrupt generation.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Theory:
* Disable the internal Rx interrupt output -or- the interrupt component itself.
*
*******************************************************************************/
void SD_DisableRxInt(void)
{
#if(0u != SD_INTERNAL_RX_INT_ENABLED)
CyIntDisable(SD_RX_ISR_NUMBER);
#endif /* (0u != SD_INTERNAL_RX_INT_ENABLED) */
}
/*******************************************************************************
* Function Name: SD_SetTxInterruptMode
********************************************************************************
*
* Summary:
* Configure which status bits trigger an interrupt event.
*
* Parameters:
* intSrc: An or'd combination of the desired status bit masks (defined in the
* header file).
*
* Return:
* None.
*
* Theory:
* Enables the output of specific status bits to the interrupt controller.
*
*******************************************************************************/
void SD_SetTxInterruptMode(uint8 intSrc)
{
SD_TX_STATUS_MASK_REG = intSrc;
}
/*******************************************************************************
* Function Name: SD_SetRxInterruptMode
********************************************************************************
*
* Summary:
* Configure which status bits trigger an interrupt event.
*
* Parameters:
* intSrc: An or'd combination of the desired status bit masks (defined in the
* header file).
*
* Return:
* None.
*
* Theory:
* Enables the output of specific status bits to the interrupt controller.
*
*******************************************************************************/
void SD_SetRxInterruptMode(uint8 intSrc)
{
SD_RX_STATUS_MASK_REG = intSrc;
}
/*******************************************************************************
* Function Name: SD_ReadTxStatus
********************************************************************************
*
* Summary:
* Read the Tx status register for the component.
*
* Parameters:
* None.
*
* Return:
* Contents of the Tx status register.
*
* Global variables:
* SD_swStatusTx - used to store in software status register,
* modified every function call - resets to zero.
*
* Theory:
* Allows the user and the API to read the Tx status register for error
* detection and flow control.
*
* Side Effects:
* Clear Tx status register of the component.
*
* Reentrant:
* No.
*
*******************************************************************************/
uint8 SD_ReadTxStatus(void)
{
uint8 tmpStatus;
#if(SD_TX_SOFTWARE_BUF_ENABLED)
/* Disable TX interrupt to protect global veriables */
SD_DisableTxInt();
tmpStatus = SD_GET_STATUS_TX(SD_swStatusTx);
SD_swStatusTx = 0u;
SD_EnableTxInt();
#else
tmpStatus = SD_TX_STATUS_REG;
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED) */
return(tmpStatus);
}
/*******************************************************************************
* Function Name: SD_ReadRxStatus
********************************************************************************
*
* Summary:
* Read the Rx status register for the component.
*
* Parameters:
* None.
*
* Return:
* Contents of the Rx status register.
*
* Global variables:
* SD_swStatusRx - used to store in software Rx status register,
* modified every function call - resets to zero.
*
* Theory:
* Allows the user and the API to read the Rx status register for error
* detection and flow control.
*
* Side Effects:
* Clear Rx status register of the component.
*
* Reentrant:
* No.
*
*******************************************************************************/
uint8 SD_ReadRxStatus(void)
{
uint8 tmpStatus;
#if(SD_RX_SOFTWARE_BUF_ENABLED)
/* Disable RX interrupt to protect global veriables */
SD_DisableRxInt();
tmpStatus = SD_GET_STATUS_RX(SD_swStatusRx);
SD_swStatusRx = 0u;
SD_EnableRxInt();
#else
tmpStatus = SD_RX_STATUS_REG;
#endif /* (SD_RX_SOFTWARE_BUF_ENABLED) */
return(tmpStatus);
}
/*******************************************************************************
* Function Name: SD_WriteTxData
********************************************************************************
*
* Summary:
* Write a byte of data to be sent across the SPI.
*
* Parameters:
* txDataByte: The data value to send across the SPI.
*
* Return:
* None.
*
* Global variables:
* SD_txBufferWrite - used for the account of the bytes which
* have been written down in the TX software buffer, modified every function
* call if TX Software Buffer is used.
* SD_txBufferRead - used for the account of the bytes which
* have been read from the TX software buffer.
* SD_txBuffer[SD_TX_BUFFER_SIZE] - used to store
* data to sending, modified every function call if TX Software Buffer is used.
*
* Theory:
* Allows the user to transmit any byte of data in a single transfer.
*
* Side Effects:
* If this function is called again before the previous byte is finished then
* the next byte will be appended to the transfer with no time between
* the byte transfers. Clear Tx status register of the component.
*
* Reentrant:
* No.
*
*******************************************************************************/
void SD_WriteTxData(uint8 txData)
{
#if(SD_TX_SOFTWARE_BUF_ENABLED)
uint8 tempStatus;
uint8 tmpTxBufferRead;
/* Block if TX buffer is FULL: don't overwrite */
do
{
tmpTxBufferRead = SD_txBufferRead;
if(0u == tmpTxBufferRead)
{
tmpTxBufferRead = (SD_TX_BUFFER_SIZE - 1u);
}
else
{
tmpTxBufferRead--;
}
}while(tmpTxBufferRead == SD_txBufferWrite);
/* Disable TX interrupt to protect global veriables */
SD_DisableTxInt();
tempStatus = SD_GET_STATUS_TX(SD_swStatusTx);
SD_swStatusTx = tempStatus;
if((SD_txBufferRead == SD_txBufferWrite) &&
(0u != (SD_swStatusTx & SD_STS_TX_FIFO_NOT_FULL)))
{
/* Add directly to the TX FIFO */
CY_SET_REG8(SD_TXDATA_PTR, txData);
}
else
{
/* Add to the TX software buffer */
SD_txBufferWrite++;
if(SD_txBufferWrite >= SD_TX_BUFFER_SIZE)
{
SD_txBufferWrite = 0u;
}
if(SD_txBufferWrite == SD_txBufferRead)
{
SD_txBufferRead++;
if(SD_txBufferRead >= SD_TX_BUFFER_SIZE)
{
SD_txBufferRead = 0u;
}
SD_txBufferFull = 1u;
}
SD_txBuffer[SD_txBufferWrite] = txData;
SD_TX_STATUS_MASK_REG |= SD_STS_TX_FIFO_NOT_FULL;
}
SD_EnableTxInt();
#else
while(0u == (SD_TX_STATUS_REG & SD_STS_TX_FIFO_NOT_FULL))
{
; /* Wait for room in FIFO */
}
/* Put byte in TX FIFO */
CY_SET_REG8(SD_TXDATA_PTR, txData);
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED) */
}
/*******************************************************************************
* Function Name: SD_ReadRxData
********************************************************************************
*
* Summary:
* Read the next byte of data received across the SPI.
*
* Parameters:
* None.
*
* Return:
* The next byte of data read from the FIFO.
*
* Global variables:
* SD_rxBufferWrite - used for the account of the bytes which
* have been written down in the RX software buffer.
* SD_rxBufferRead - used for the account of the bytes which
* have been read from the RX software buffer, modified every function
* call if RX Software Buffer is used.
* SD_rxBuffer[SD_RX_BUFFER_SIZE] - used to store
* received data.
*
* Theory:
* Allows the user to read a byte of data received.
*
* Side Effects:
* Will return invalid data if the FIFO is empty. The user should Call
* GetRxBufferSize() and if it returns a non-zero value then it is safe to call
* ReadByte() function.
*
* Reentrant:
* No.
*
*******************************************************************************/
uint8 SD_ReadRxData(void)
{
uint8 rxData;
#if(SD_RX_SOFTWARE_BUF_ENABLED)
/* Disable RX interrupt to protect global veriables */
SD_DisableRxInt();
if(SD_rxBufferRead != SD_rxBufferWrite)
{
if(0u == SD_rxBufferFull)
{
SD_rxBufferRead++;
if(SD_rxBufferRead >= SD_RX_BUFFER_SIZE)
{
SD_rxBufferRead = 0u;
}
}
else
{
SD_rxBufferFull = 0u;
}
}
rxData = SD_rxBuffer[SD_rxBufferRead];
SD_EnableRxInt();
#else
rxData = CY_GET_REG8(SD_RXDATA_PTR);
#endif /* (SD_RX_SOFTWARE_BUF_ENABLED) */
return(rxData);
}
/*******************************************************************************
* Function Name: SD_GetRxBufferSize
********************************************************************************
*
* Summary:
* Returns the number of bytes/words of data currently held in the RX buffer.
* If RX Software Buffer not used then function return 0 if FIFO empty or 1 if
* FIFO not empty. In another case function return size of RX Software Buffer.
*
* Parameters:
* None.
*
* Return:
* Integer count of the number of bytes/words in the RX buffer.
*
* Global variables:
* SD_rxBufferWrite - used for the account of the bytes which
* have been written down in the RX software buffer.
* SD_rxBufferRead - used for the account of the bytes which
* have been read from the RX software buffer.
*
* Side Effects:
* Clear status register of the component.
*
*******************************************************************************/
uint8 SD_GetRxBufferSize(void)
{
uint8 size;
#if(SD_RX_SOFTWARE_BUF_ENABLED)
/* Disable RX interrupt to protect global veriables */
SD_DisableRxInt();
if(SD_rxBufferRead == SD_rxBufferWrite)
{
size = 0u;
}
else if(SD_rxBufferRead < SD_rxBufferWrite)
{
size = (SD_rxBufferWrite - SD_rxBufferRead);
}
else
{
size = (SD_RX_BUFFER_SIZE - SD_rxBufferRead) + SD_rxBufferWrite;
}
SD_EnableRxInt();
#else
/* We can only know if there is data in the RX FIFO */
size = (0u != (SD_RX_STATUS_REG & SD_STS_RX_FIFO_NOT_EMPTY)) ? 1u : 0u;
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED) */
return(size);
}
/*******************************************************************************
* Function Name: SD_GetTxBufferSize
********************************************************************************
*
* Summary:
* Returns the number of bytes/words of data currently held in the TX buffer.
* If TX Software Buffer not used then function return 0 - if FIFO empty, 1 - if
* FIFO not full, 4 - if FIFO full. In another case function return size of TX
* Software Buffer.
*
* Parameters:
* None.
*
* Return:
* Integer count of the number of bytes/words in the TX buffer.
*
* Global variables:
* SD_txBufferWrite - used for the account of the bytes which
* have been written down in the TX software buffer.
* SD_txBufferRead - used for the account of the bytes which
* have been read from the TX software buffer.
*
* Side Effects:
* Clear status register of the component.
*
*******************************************************************************/
uint8 SD_GetTxBufferSize(void)
{
uint8 size;
#if(SD_TX_SOFTWARE_BUF_ENABLED)
/* Disable TX interrupt to protect global veriables */
SD_DisableTxInt();
if(SD_txBufferRead == SD_txBufferWrite)
{
size = 0u;
}
else if(SD_txBufferRead < SD_txBufferWrite)
{
size = (SD_txBufferWrite - SD_txBufferRead);
}
else
{
size = (SD_TX_BUFFER_SIZE - SD_txBufferRead) + SD_txBufferWrite;
}
SD_EnableTxInt();
#else
size = SD_TX_STATUS_REG;
if(0u != (size & SD_STS_TX_FIFO_EMPTY))
{
size = 0u;
}
else if(0u != (size & SD_STS_TX_FIFO_NOT_FULL))
{
size = 1u;
}
else
{
size = SD_FIFO_SIZE;
}
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED) */
return(size);
}
/*******************************************************************************
* Function Name: SD_ClearRxBuffer
********************************************************************************
*
* Summary:
* Clear the RX RAM buffer by setting the read and write pointers both to zero.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Global variables:
* SD_rxBufferWrite - used for the account of the bytes which
* have been written down in the RX software buffer, modified every function
* call - resets to zero.
* SD_rxBufferRead - used for the account of the bytes which
* have been read from the RX software buffer, modified every function call -
* resets to zero.
*
* Theory:
* Setting the pointers to zero makes the system believe there is no data to
* read and writing will resume at address 0 overwriting any data that may have
* remained in the RAM.
*
* Side Effects:
* Any received data not read from the RAM buffer will be lost when overwritten.
*
* Reentrant:
* No.
*
*******************************************************************************/
void SD_ClearRxBuffer(void)
{
/* Clear Hardware RX FIFO */
while(0u !=(SD_RX_STATUS_REG & SD_STS_RX_FIFO_NOT_EMPTY))
{
(void) CY_GET_REG8(SD_RXDATA_PTR);
}
#if(SD_RX_SOFTWARE_BUF_ENABLED)
/* Disable RX interrupt to protect global veriables */
SD_DisableRxInt();
SD_rxBufferFull = 0u;
SD_rxBufferRead = 0u;
SD_rxBufferWrite = 0u;
SD_EnableRxInt();
#endif /* (SD_RX_SOFTWARE_BUF_ENABLED) */
}
/*******************************************************************************
* Function Name: SD_ClearTxBuffer
********************************************************************************
*
* Summary:
* Clear the TX RAM buffer by setting the read and write pointers both to zero.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Global variables:
* SD_txBufferWrite - used for the account of the bytes which
* have been written down in the TX software buffer, modified every function
* call - resets to zero.
* SD_txBufferRead - used for the account of the bytes which
* have been read from the TX software buffer, modified every function call -
* resets to zero.
*
* Theory:
* Setting the pointers to zero makes the system believe there is no data to
* read and writing will resume at address 0 overwriting any data that may have
* remained in the RAM.
*
* Side Effects:
* Any data not yet transmitted from the RAM buffer will be lost when
* overwritten.
*
* Reentrant:
* No.
*
*******************************************************************************/
void SD_ClearTxBuffer(void)
{
uint8 enableInterrupts;
enableInterrupts = CyEnterCriticalSection();
/* Clear TX FIFO */
SD_AUX_CONTROL_DP0_REG |= ((uint8) SD_TX_FIFO_CLR);
SD_AUX_CONTROL_DP0_REG &= ((uint8) ~SD_TX_FIFO_CLR);
#if(SD_USE_SECOND_DATAPATH)
/* Clear TX FIFO for 2nd Datapath */
SD_AUX_CONTROL_DP1_REG |= ((uint8) SD_TX_FIFO_CLR);
SD_AUX_CONTROL_DP1_REG &= ((uint8) ~SD_TX_FIFO_CLR);
#endif /* (SD_USE_SECOND_DATAPATH) */
CyExitCriticalSection(enableInterrupts);
#if(SD_TX_SOFTWARE_BUF_ENABLED)
/* Disable TX interrupt to protect global veriables */
SD_DisableTxInt();
SD_txBufferFull = 0u;
SD_txBufferRead = 0u;
SD_txBufferWrite = 0u;
/* Buffer is EMPTY: disable TX FIFO NOT FULL interrupt */
SD_TX_STATUS_MASK_REG &= ((uint8) ~SD_STS_TX_FIFO_NOT_FULL);
SD_EnableTxInt();
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED) */
}
#if(0u != SD_BIDIRECTIONAL_MODE)
/*******************************************************************************
* Function Name: SD_TxEnable
********************************************************************************
*
* Summary:
* If the SPI master is configured to use a single bi-directional pin then this
* will set the bi-directional pin to transmit.
*
* Parameters:
* None.
*
* Return:
* None.
*
*******************************************************************************/
void SD_TxEnable(void)
{
SD_CONTROL_REG |= SD_CTRL_TX_SIGNAL_EN;
}
/*******************************************************************************
* Function Name: SD_TxDisable
********************************************************************************
*
* Summary:
* If the SPI master is configured to use a single bi-directional pin then this
* will set the bi-directional pin to receive.
*
* Parameters:
* None.
*
* Return:
* None.
*
*******************************************************************************/
void SD_TxDisable(void)
{
SD_CONTROL_REG &= ((uint8) ~SD_CTRL_TX_SIGNAL_EN);
}
#endif /* (0u != SD_BIDIRECTIONAL_MODE) */
/*******************************************************************************
* Function Name: SD_PutArray
********************************************************************************
*
* Summary:
* Write available data from ROM/RAM to the TX buffer while space is available
* in the TX buffer. Keep trying until all data is passed to the TX buffer.
*
* Parameters:
* *buffer: Pointer to the location in RAM containing the data to send
* byteCount: The number of bytes to move to the transmit buffer.
*
* Return:
* None.
*
* Side Effects:
* Will stay in this routine until all data has been sent. May get locked in
* this loop if data is not being initiated by the master if there is not
* enough room in the TX FIFO.
*
* Reentrant:
* No.
*
*******************************************************************************/
void SD_PutArray(const uint8 buffer[], uint8 byteCount)
{
uint8 bufIndex;
bufIndex = 0u;
while(byteCount > 0u)
{
SD_WriteTxData(buffer[bufIndex]);
bufIndex++;
byteCount--;
}
}
/*******************************************************************************
* Function Name: SD_ClearFIFO
********************************************************************************
*
* Summary:
* Clear the RX and TX FIFO's of all data for a fresh start.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Side Effects:
* Clear status register of the component.
*
*******************************************************************************/
void SD_ClearFIFO(void)
{
uint8 enableInterrupts;
/* Clear Hardware RX FIFO */
while(0u !=(SD_RX_STATUS_REG & SD_STS_RX_FIFO_NOT_EMPTY))
{
(void) CY_GET_REG8(SD_RXDATA_PTR);
}
enableInterrupts = CyEnterCriticalSection();
/* Clear TX FIFO */
SD_AUX_CONTROL_DP0_REG |= ((uint8) SD_TX_FIFO_CLR);
SD_AUX_CONTROL_DP0_REG &= ((uint8) ~SD_TX_FIFO_CLR);
#if(SD_USE_SECOND_DATAPATH)
/* Clear TX FIFO for 2nd Datapath */
SD_AUX_CONTROL_DP1_REG |= ((uint8) SD_TX_FIFO_CLR);
SD_AUX_CONTROL_DP1_REG &= ((uint8) ~SD_TX_FIFO_CLR);
#endif /* (SD_USE_SECOND_DATAPATH) */
CyExitCriticalSection(enableInterrupts);
}
/* Following functions are for version Compatibility, they are obsolete.
* Please do not use it in new projects.
*/
/*******************************************************************************
* Function Name: SD_EnableInt
********************************************************************************
*
* Summary:
* Enable internal interrupt generation.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Theory:
* Enable the internal interrupt output -or- the interrupt component itself.
*
*******************************************************************************/
void SD_EnableInt(void)
{
SD_EnableRxInt();
SD_EnableTxInt();
}
/*******************************************************************************
* Function Name: SD_DisableInt
********************************************************************************
*
* Summary:
* Disable internal interrupt generation.
*
* Parameters:
* None.
*
* Return:
* None.
*
* Theory:
* Disable the internal interrupt output -or- the interrupt component itself.
*
*******************************************************************************/
void SD_DisableInt(void)
{
SD_DisableTxInt();
SD_DisableRxInt();
}
/*******************************************************************************
* Function Name: SD_SetInterruptMode
********************************************************************************
*
* Summary:
* Configure which status bits trigger an interrupt event.
*
* Parameters:
* intSrc: An or'd combination of the desired status bit masks (defined in the
* header file).
*
* Return:
* None.
*
* Theory:
* Enables the output of specific status bits to the interrupt controller.
*
*******************************************************************************/
void SD_SetInterruptMode(uint8 intSrc)
{
SD_TX_STATUS_MASK_REG = (intSrc & ((uint8) ~SD_STS_SPI_IDLE));
SD_RX_STATUS_MASK_REG = intSrc;
}
/*******************************************************************************
* Function Name: SD_ReadStatus
********************************************************************************
*
* Summary:
* Read the status register for the component.
*
* Parameters:
* None.
*
* Return:
* Contents of the status register.
*
* Global variables:
* SD_swStatus - used to store in software status register,
* modified every function call - resets to zero.
*
* Theory:
* Allows the user and the API to read the status register for error detection
* and flow control.
*
* Side Effects:
* Clear status register of the component.
*
* Reentrant:
* No.
*
*******************************************************************************/
uint8 SD_ReadStatus(void)
{
uint8 tmpStatus;
#if(SD_TX_SOFTWARE_BUF_ENABLED || SD_RX_SOFTWARE_BUF_ENABLED)
SD_DisableInt();
tmpStatus = SD_GET_STATUS_RX(SD_swStatusRx);
tmpStatus |= SD_GET_STATUS_TX(SD_swStatusTx);
tmpStatus &= ((uint8) ~SD_STS_SPI_IDLE);
SD_swStatusTx = 0u;
SD_swStatusRx = 0u;
SD_EnableInt();
#else
tmpStatus = SD_RX_STATUS_REG;
tmpStatus |= SD_TX_STATUS_REG;
tmpStatus &= ((uint8) ~SD_STS_SPI_IDLE);
#endif /* (SD_TX_SOFTWARE_BUF_ENABLED || SD_RX_SOFTWARE_BUF_ENABLED) */
return(tmpStatus);
}
/* [] END OF FILE */
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