Add driver lib for projects which require it

1 files changed, 851 insertions, 0 deletions

diff --git a/driverlib/flash.c b/driverlib/flash.c
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+//*****************************************************************************

+//

+// flash.c - Driver for programming the on-chip flash.

+//

+// Copyright (c) 2005-2014 Texas Instruments Incorporated.  All rights reserved.

+// Software License Agreement

+// 

+//   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 following disclaimer.

+// 

+//   Redistributions in binary form must reproduce the above copyright

+//   notice, this list of conditions and the following disclaimer in the

+//   documentation and/or other materials provided with the  

+//   distribution.

+// 

+//   Neither the name of Texas Instruments Incorporated nor the names of

+//   its contributors may be used to endorse or promote products derived

+//   from this software without specific prior written permission.

+// 

+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+// OWNER OR CONTRIBUTORS 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.

+// 

+// This is part of revision 2.1.0.12573 of the Tiva Peripheral Driver Library.

+//

+//*****************************************************************************

+

+//*****************************************************************************

+//

+//! \addtogroup flash_api

+//! @{

+//

+//*****************************************************************************

+

+#include <stdbool.h>

+#include <stdint.h>

+#include "inc/hw_flash.h"

+#include "inc/hw_ints.h"

+#include "inc/hw_sysctl.h"

+#include "inc/hw_types.h"

+#include "driverlib/debug.h"

+#include "driverlib/flash.h"

+#include "driverlib/interrupt.h"

+

+//*****************************************************************************

+//

+// An array that maps the specified memory bank to the appropriate Flash

+// Memory Protection Program Enable (FMPPE) register.

+//

+//*****************************************************************************

+static const uint32_t g_pui32FMPPERegs[] =

+{

+    FLASH_FMPPE0,

+    FLASH_FMPPE1,

+    FLASH_FMPPE2,

+    FLASH_FMPPE3,

+    FLASH_FMPPE4,

+    FLASH_FMPPE5,

+    FLASH_FMPPE6,

+    FLASH_FMPPE7,

+    FLASH_FMPPE8,

+    FLASH_FMPPE9,

+    FLASH_FMPPE10,

+    FLASH_FMPPE11,

+    FLASH_FMPPE12,

+    FLASH_FMPPE13,

+    FLASH_FMPPE14,

+    FLASH_FMPPE15,

+};

+

+//*****************************************************************************

+//

+// An array that maps the specified memory bank to the appropriate Flash

+// Memory Protection Read Enable (FMPRE) register.

+//

+//*****************************************************************************

+static const uint32_t g_pui32FMPRERegs[] =

+{

+    FLASH_FMPRE0,

+    FLASH_FMPRE1,

+    FLASH_FMPRE2,

+    FLASH_FMPRE3,

+    FLASH_FMPRE4,

+    FLASH_FMPRE5,

+    FLASH_FMPRE6,

+    FLASH_FMPRE7,

+    FLASH_FMPRE8,

+    FLASH_FMPRE9,

+    FLASH_FMPRE10,

+    FLASH_FMPRE11,

+    FLASH_FMPRE12,

+    FLASH_FMPRE13,

+    FLASH_FMPRE14,

+    FLASH_FMPRE15,

+};

+

+//*****************************************************************************

+//

+//! Erases a block of flash.

+//!

+//! \param ui32Address is the start address of the flash block to be erased.

+//!

+//! This function erases a block of the on-chip flash.  After erasing, the

+//! block is filled with 0xFF bytes.  Read-only and execute-only blocks cannot

+//! be erased.

+//!

+//! The flash block size is device-class dependent.  All TM4C123x devices use

+//! 1-KB blocks but TM4C129x devices use 16-KB blocks. Please consult the

+//! device datasheet to determine the block size in use.

+//!

+//! This function does not return until the block has been erased.

+//!

+//! \return Returns 0 on success, or -1 if an invalid block address was

+//! specified or the block is write-protected.

+//

+//*****************************************************************************

+int32_t

+FlashErase(uint32_t ui32Address)

+{

+    //

+    // Check the arguments.

+    //

+    ASSERT(!(ui32Address & (FLASH_ERASE_SIZE - 1)));

+

+    //

+    // Clear the flash access and error interrupts.

+    //

+    HWREG(FLASH_FCMISC) = (FLASH_FCMISC_AMISC | FLASH_FCMISC_VOLTMISC |

+                           FLASH_FCMISC_ERMISC);

+

+    //

+    // Erase the block.

+    //

+    HWREG(FLASH_FMA) = ui32Address;

+    HWREG(FLASH_FMC) = FLASH_FMC_WRKEY | FLASH_FMC_ERASE;

+

+    //

+    // Wait until the block has been erased.

+    //

+    while(HWREG(FLASH_FMC) & FLASH_FMC_ERASE)

+    {

+    }

+

+    //

+    // Return an error if an access violation or erase error occurred.

+    //

+    if(HWREG(FLASH_FCRIS) & (FLASH_FCRIS_ARIS | FLASH_FCRIS_VOLTRIS |

+                             FLASH_FCRIS_ERRIS))

+    {

+        return(-1);

+    }

+

+    //

+    // Success.

+    //

+    return(0);

+}

+

+//*****************************************************************************

+//

+//! Programs flash.

+//!

+//! \param pui32Data is a pointer to the data to be programmed.

+//! \param ui32Address is the starting address in flash to be programmed.  Must

+//! be a multiple of four.

+//! \param ui32Count is the number of bytes to be programmed.  Must be a

+//! multiple of four.

+//!

+//! This function programs a sequence of words into the on-chip flash.

+//! Because the flash is programmed one word at a time, the starting address

+//! and byte count must both be multiples of four.  It is up to the caller to

+//! verify the programmed contents, if such verification is required.

+//!

+//! This function does not return until the data has been programmed.

+//!

+//! \return Returns 0 on success, or -1 if a programming error is encountered.

+//

+//*****************************************************************************

+int32_t

+FlashProgram(uint32_t *pui32Data, uint32_t ui32Address, uint32_t ui32Count)

+{

+    //

+    // Check the arguments.

+    //

+    ASSERT(!(ui32Address & 3));

+    ASSERT(!(ui32Count & 3));

+

+    //

+    // Clear the flash access and error interrupts.

+    //

+    HWREG(FLASH_FCMISC) = (FLASH_FCMISC_AMISC | FLASH_FCMISC_VOLTMISC |

+                           FLASH_FCMISC_INVDMISC | FLASH_FCMISC_PROGMISC);

+

+    //

+    // Loop over the words to be programmed.

+    //

+    while(ui32Count)

+    {

+        //

+        // Set the address of this block of words.

+        //

+        HWREG(FLASH_FMA) = ui32Address & ~(0x7f);

+

+        //

+        // Loop over the words in this 32-word block.

+        //

+        while(((ui32Address & 0x7c) || (HWREG(FLASH_FWBVAL) == 0)) &&

+              (ui32Count != 0))

+        {

+            //

+            // Write this word into the write buffer.

+            //

+            HWREG(FLASH_FWBN + (ui32Address & 0x7c)) = *pui32Data++;

+            ui32Address += 4;

+            ui32Count -= 4;

+        }

+

+        //

+        // Program the contents of the write buffer into flash.

+        //

+        HWREG(FLASH_FMC2) = FLASH_FMC2_WRKEY | FLASH_FMC2_WRBUF;

+

+        //

+        // Wait until the write buffer has been programmed.

+        //

+        while(HWREG(FLASH_FMC2) & FLASH_FMC2_WRBUF)

+        {

+        }

+    }

+

+    //

+    // Return an error if an access violation occurred.

+    //

+    if(HWREG(FLASH_FCRIS) & (FLASH_FCRIS_ARIS | FLASH_FCRIS_VOLTRIS |

+                             FLASH_FCRIS_INVDRIS | FLASH_FCRIS_PROGRIS))

+    {

+        return(-1);

+    }

+

+    //

+    // Success.

+    //

+    return(0);

+}

+

+//*****************************************************************************

+//

+//! Gets the protection setting for a block of flash.

+//!

+//! \param ui32Address is the start address of the flash block to be queried.

+//!

+//! This function gets the current protection for the specified block of flash.

+//! Refer to the device data sheet to determine the granularity for each

+//! protection option. A block can be read/write, read-only, or execute-only.

+//! Read/write blocks can be read, executed, erased, and programmed.  Read-only

+//! blocks can be read and executed.  Execute-only blocks can only be executed;

+//! processor and debugger data reads are not allowed.

+//!

+//! \return Returns the protection setting for this block.  See

+//! FlashProtectSet() for possible values.

+//

+//*****************************************************************************

+tFlashProtection

+FlashProtectGet(uint32_t ui32Address)

+{

+    uint32_t ui32FMPRE, ui32FMPPE;

+    uint32_t ui32Bank;

+

+    //

+    // Check the argument.

+    //

+    ASSERT(!(ui32Address & (FLASH_PROTECT_SIZE - 1)));

+

+    //

+    // Calculate the Flash Bank from Base Address, and mask off the Bank

+    // from ui32Address for subsequent reference.

+    //

+    ui32Bank = (((ui32Address / FLASH_PROTECT_SIZE) / 32) % 4);

+    ui32Address &= ((FLASH_PROTECT_SIZE * 32) - 1);

+

+    //

+    // Read the appropriate flash protection registers for the specified

+    // flash bank.

+    //

+    ui32FMPRE = HWREG(g_pui32FMPRERegs[ui32Bank]);

+    ui32FMPPE = HWREG(g_pui32FMPPERegs[ui32Bank]);

+

+    //

+    // Check the appropriate protection bits for the block of memory that

+    // is specified by the address.

+    //

+    switch((((ui32FMPRE >> (ui32Address / FLASH_PROTECT_SIZE)) & 0x1) << 1) |

+           ((ui32FMPPE >> (ui32Address / FLASH_PROTECT_SIZE)) & 0x1))

+    {

+        //

+        // This block is marked as execute only (that is, it can not be erased

+        // or programmed, and the only reads allowed are via the instruction

+        // fetch interface).

+        //

+        case 0:

+        case 1:

+        {

+            return(FlashExecuteOnly);

+        }

+

+        //

+        // This block is marked as read only (that is, it can not be erased or

+        // programmed).

+        //

+        case 2:

+        {

+            return(FlashReadOnly);

+        }

+

+        //

+        // This block is read/write; it can be read, erased, and programmed.

+        //

+        case 3:

+        default:

+        {

+            return(FlashReadWrite);

+        }

+    }

+}

+

+//*****************************************************************************

+//

+//! Sets the protection setting for a block of flash.

+//!

+//! \param ui32Address is the start address of the flash block to be protected.

+//! \param eProtect is the protection to be applied to the block.  Can be one

+//! of \b FlashReadWrite, \b FlashReadOnly, or \b FlashExecuteOnly.

+//!

+//! This function sets the protection for the specified block of flash.  Refer

+//! to the device data sheet to determine the granularity for each protection

+//! option.  Blocks that are read/write can be made read-only or execute-only.

+//! Blocks that are read-only can be made execute-only.  Blocks that are

+//! execute-only cannot have their protection modified.  Attempts to make the

+//! block protection less stringent (that is, read-only to read/write)

+//! result in a failure (and are prevented by the hardware).

+//!

+//! Changes to the flash protection are maintained only until the next reset.

+//! This protocol allows the application to be executed in the desired flash

+//! protection environment to check for inappropriate flash access (via the

+//! flash interrupt).  To make the flash protection permanent, use the

+//! FlashProtectSave() function.

+//!

+//! \return Returns 0 on success, or -1 if an invalid address or an invalid

+//! protection was specified.

+//

+//*****************************************************************************

+int32_t

+FlashProtectSet(uint32_t ui32Address, tFlashProtection eProtect)

+{

+    uint32_t ui32ProtectRE, ui32ProtectPE;

+    uint32_t ui32Bank;

+

+    //

+    // Check the argument.

+    //

+    ASSERT(!(ui32Address & (FLASH_PROTECT_SIZE - 1)));

+    ASSERT((eProtect == FlashReadWrite) || (eProtect == FlashReadOnly) ||

+           (eProtect == FlashExecuteOnly));

+

+    //

+    // Convert the address into a block number.

+    //

+    ui32Address /= FLASH_PROTECT_SIZE;

+

+    //

+    // ui32Address contains a "raw" block number.  Derive the Flash Bank from

+    // the "raw" block number, and convert ui32Address to a "relative"

+    // block number.

+    //

+    ui32Bank = ((ui32Address / 32) % 4);

+    ui32Address %= 32;

+

+    //

+    // Get the current protection for the specified flash bank.

+    //

+    ui32ProtectRE = HWREG(g_pui32FMPRERegs[ui32Bank]);

+    ui32ProtectPE = HWREG(g_pui32FMPPERegs[ui32Bank]);

+

+    //

+    // Set the protection based on the requested protection.

+    //

+    switch(eProtect)

+    {

+        //

+        // Make this block execute only.

+        //

+        case FlashExecuteOnly:

+        {

+            //

+            // Turn off the read and program bits for this block.

+            //

+            ui32ProtectRE &= ~(0x1 << ui32Address);

+            ui32ProtectPE &= ~(0x1 << ui32Address);

+

+            //

+            // We're done handling this protection.

+            //

+            break;

+        }

+

+        //

+        // Make this block read only.

+        //

+        case FlashReadOnly:

+        {

+            //

+            // The block can not be made read only if it is execute only.

+            //

+            if(((ui32ProtectRE >> ui32Address) & 0x1) != 0x1)

+            {

+                return(-1);

+            }

+

+            //

+            // Make this block read only.

+            //

+            ui32ProtectPE &= ~(0x1 << ui32Address);

+

+            //

+            // We're done handling this protection.

+            //

+            break;

+        }

+

+        //

+        // Make this block read/write.

+        //

+        case FlashReadWrite:

+        default:

+        {

+            //

+            // The block can not be made read/write if it is not already

+            // read/write.

+            //

+            if((((ui32ProtectRE >> ui32Address) & 0x1) != 0x1) ||

+               (((ui32ProtectPE >> ui32Address) & 0x1) != 0x1))

+            {

+                return(-1);

+            }

+

+            //

+            // The block is already read/write, so there is nothing to do.

+            //

+            return(0);

+        }

+    }

+

+    //

+    // Set the new protection for the specified flash bank.

+    //

+    HWREG(g_pui32FMPRERegs[ui32Bank]) = ui32ProtectRE;

+    HWREG(g_pui32FMPPERegs[ui32Bank]) = ui32ProtectPE;

+

+    //

+    // Success.

+    //

+    return(0);

+}

+

+//*****************************************************************************

+//

+//! Saves the flash protection settings.

+//!

+//! This function makes the currently programmed flash protection settings

+//! permanent.  This operation is non-reversible; a chip reset or power cycle

+//! does not change the flash protection.

+//!

+//! This function does not return until the protection has been saved.

+//!

+//! \return Returns 0 on success, or -1 if a hardware error is encountered.

+//

+//*****************************************************************************

+int32_t

+FlashProtectSave(void)

+{

+    uint32_t ui32Temp;

+

+    //

+    // Save the entire bank of 8 flash protection registers.

+    //

+    for(ui32Temp = 0; ui32Temp < 8; ui32Temp++)

+    {

+        //

+        // Tell the flash controller to write the flash protection register.

+        //

+        HWREG(FLASH_FMA) = ui32Temp;

+        HWREG(FLASH_FMC) = FLASH_FMC_WRKEY | FLASH_FMC_COMT;

+

+        //

+        // Wait until the write has completed.

+        //

+        while(HWREG(FLASH_FMC) & FLASH_FMC_COMT)

+        {

+        }

+    }

+

+    //

+    // Success.

+    //

+    return(0);

+}

+

+//*****************************************************************************

+//

+//! Gets the user registers.

+//!

+//! \param pui32User0 is a pointer to the location to store USER Register 0.

+//! \param pui32User1 is a pointer to the location to store USER Register 1.

+//!

+//! This function reads the contents of user registers 0 and 1, and

+//! stores them in the specified locations.

+//!

+//! \return Returns 0 on success, or -1 if a hardware error is encountered.

+//

+//*****************************************************************************

+int32_t

+FlashUserGet(uint32_t *pui32User0, uint32_t *pui32User1)

+{

+    //

+    // Verify that the pointers are valid.

+    //

+    ASSERT(pui32User0 != 0);

+    ASSERT(pui32User1 != 0);

+

+    //

+    // Get and store the current value of the user registers.

+    //

+    *pui32User0 = HWREG(FLASH_USERREG0);

+    *pui32User1 = HWREG(FLASH_USERREG1);

+

+    //

+    // Success.

+    //

+    return(0);

+}

+

+//*****************************************************************************

+//

+//! Sets the user registers.

+//!

+//! \param ui32User0 is the value to store in USER Register 0.

+//! \param ui32User1 is the value to store in USER Register 1.

+//!

+//! This function sets the contents of the user registers 0 and 1 to

+//! the specified values.

+//!

+//! \return Returns 0 on success, or -1 if a hardware error is encountered.

+//

+//*****************************************************************************

+int32_t

+FlashUserSet(uint32_t ui32User0, uint32_t ui32User1)

+{

+    //

+    // Save the new values into the user registers.

+    //

+    HWREG(FLASH_USERREG0) = ui32User0;

+    HWREG(FLASH_USERREG1) = ui32User1;

+

+    //

+    // Success.

+    //

+    return(0);

+}

+

+//*****************************************************************************

+//

+//! Saves the user registers.

+//!

+//! This function makes the currently programmed user register 0 and 1 settings

+//! permanent.  This operation is non-reversible; a chip reset or power cycle

+//! does not change the flash protection.

+//!

+//! This function does not return until the protection has been saved.

+//!

+//! \return Returns 0 on success, or -1 if a hardware error is encountered.

+//

+//*****************************************************************************

+int32_t

+FlashUserSave(void)

+{

+    //

+    // Setting the MSB of FMA will trigger a permanent save of a USER

+    // register.  Bit 0 will indicate User 0 (0) or User 1 (1).

+    //

+    HWREG(FLASH_FMA) = 0x80000000;

+    HWREG(FLASH_FMC) = FLASH_FMC_WRKEY | FLASH_FMC_COMT;

+

+    //

+    // Wait until the write has completed.

+    //

+    while(HWREG(FLASH_FMC) & FLASH_FMC_COMT)

+    {

+    }

+

+    //

+    // Tell the flash controller to write the USER1 Register.

+    //

+    HWREG(FLASH_FMA) = 0x80000001;

+    HWREG(FLASH_FMC) = FLASH_FMC_WRKEY | FLASH_FMC_COMT;

+

+    //

+    // Wait until the write has completed.

+    //

+    while(HWREG(FLASH_FMC) & FLASH_FMC_COMT)

+    {

+    }

+

+    //

+    // Success.

+    //

+    return(0);

+}

+

+//*****************************************************************************

+//

+//! Registers an interrupt handler for the flash interrupt.

+//!

+//! \param pfnHandler is a pointer to the function to be called when the flash

+//! interrupt occurs.

+//!

+//! This function sets the handler to be called when the flash interrupt

+//! occurs.  The flash controller can generate an interrupt when an invalid

+//! flash access occurs, such as trying to program or erase a read-only block,

+//! or trying to read from an execute-only block.  It can also generate an

+//! interrupt when a program or erase operation has completed.  The interrupt

+//! is automatically enabled when the handler is registered.

+//!

+//! \sa IntRegister() for important information about registering interrupt

+//! handlers.

+//!

+//! \return None.

+//

+//*****************************************************************************

+void

+FlashIntRegister(void (*pfnHandler)(void))

+{

+    //

+    // Register the interrupt handler, returning an error if an error occurs.

+    //

+    IntRegister(INT_FLASH_TM4C123, pfnHandler);

+

+    //

+    // Enable the flash interrupt.

+    //

+    IntEnable(INT_FLASH_TM4C123);

+}

+

+//*****************************************************************************

+//

+//! Unregisters the interrupt handler for the flash interrupt.

+//!

+//! This function clears the handler to be called when the flash interrupt

+//! occurs.  This function also masks off the interrupt in the interrupt

+//! controller so that the interrupt handler is no longer called.

+//!

+//! \sa IntRegister() for important information about registering interrupt

+//! handlers.

+//!

+//! \return None.

+//

+//*****************************************************************************

+void

+FlashIntUnregister(void)

+{

+    //

+    // Disable the interrupt.

+    //

+    IntDisable(INT_FLASH_TM4C123);

+

+    //

+    // Unregister the interrupt handler.

+    //

+    IntUnregister(INT_FLASH_TM4C123);

+}

+

+//*****************************************************************************

+//

+//! Enables individual flash controller interrupt sources.

+//!

+//! \param ui32IntFlags is a bit mask of the interrupt sources to be enabled.

+//! The ui32IntFlags parameter can be the logical OR of any of the following

+//! values:

+//!

+//! - \b FLASH_INT_ACCESS occurs when a program or erase action was attempted

+//! on a block of flash that is marked as read-only or execute-only.

+//! - \b FLASH_INT_PROGRAM occurs when a programming or erase cycle completes.

+//! - \b FLASH_INT_EEPROM occurs when an EEPROM interrupt occurs. The source of

+//! the EEPROM interrupt can be determined by reading the EEDONE register.

+//! - \b FLASH_INT_VOLTAGE_ERR occurs when the voltage was out of spec during

+//! the flash operation and the operation was terminated.

+//! - \b FLASH_INT_DATA_ERR occurs when an operation attempts to program a bit that

+//! contains a 0 to a 1.

+//! - \b FLASH_INT_ERASE_ERR occurs when an erase operation fails.

+//! - \b FLASH_INT_PROGRAM_ERR occurs when a program operation fails.

+//!

+//! This function enables the indicated flash controller interrupt sources.

+//! Only the sources that are enabled can be reflected to the processor

+//! interrupt; disabled sources have no effect on the processor.

+//!

+//! \return None.

+//

+//*****************************************************************************

+void

+FlashIntEnable(uint32_t ui32IntFlags)

+{

+    //

+    // Enable the specified interrupts.

+    //

+    HWREG(FLASH_FCIM) |= ui32IntFlags;

+}

+

+//*****************************************************************************

+//

+//! Disables individual flash controller interrupt sources.

+//!

+//! \param ui32IntFlags is a bit mask of the interrupt sources to be disabled.

+//! The ui32IntFlags parameter can be the logical OR of any of the following

+//! values:

+//!

+//! - \b FLASH_INT_ACCESS occurs when a program or erase action was attempted

+//! on a block of flash that is marked as read-only or execute-only.

+//! - \b FLASH_INT_PROGRAM occurs when a programming or erase cycle completes.

+//! - \b FLASH_INT_EEPROM occurs when an EEPROM interrupt occurs. The source of

+//! the EEPROM interrupt can be determined by reading the EEDONE register.

+//! - \b FLASH_INT_VOLTAGE_ERR occurs when the voltage was out of spec during

+//! the flash operation and the operation was terminated.

+//! - \b FLASH_INT_DATA_ERR occurs when an operation attempts to program a bit that

+//! contains a 0 to a 1.

+//! - \b FLASH_INT_ERASE_ERR occurs when an erase operation fails.

+//! - \b FLASH_INT_PROGRAM_ERR occurs when a program operation fails.

+//!

+//! This function disables the indicated flash controller interrupt sources.

+//! Only the sources that are enabled can be reflected to the processor

+//! interrupt; disabled sources have no effect on the processor.

+//!

+//! \return None.

+//

+//*****************************************************************************

+void

+FlashIntDisable(uint32_t ui32IntFlags)

+{

+    //

+    // Disable the specified interrupts.

+    //

+    HWREG(FLASH_FCIM) &= ~(ui32IntFlags);

+}

+

+//*****************************************************************************

+//

+//! Gets the current interrupt status.

+//!

+//! \param bMasked is false if the raw interrupt status is required and true if

+//! the masked interrupt status is required.

+//!

+//! This function returns the interrupt status for the flash controller.

+//! Either the raw interrupt status or the status of interrupts that are

+//! allowed to reflect to the processor can be returned.

+//!

+//! \return The current interrupt status, enumerated as a bit field of

+//! \b FLASH_INT_ACCESS, \b FLASH_INT_PROGRAM, \b FLASH_INT_EEPROM,

+//! FLASH_INT_VOLTAGE_ERR, FLASH_INT_DATA_ERR, FLASH_INT_ERASE_ERR, and

+//! FLASH_INT_PROGRAM_ERR.

+//

+//*****************************************************************************

+uint32_t

+FlashIntStatus(bool bMasked)

+{

+    //

+    // Return either the interrupt status or the raw interrupt status as

+    // requested.

+    //

+    if(bMasked)

+    {

+        return(HWREG(FLASH_FCMISC));

+    }

+    else

+    {

+        return(HWREG(FLASH_FCRIS));

+    }

+}

+

+//*****************************************************************************

+//

+//! Clears flash controller interrupt sources.

+//!

+//! \param ui32IntFlags is the bit mask of the interrupt sources to be cleared.

+//!

+//! The specified flash controller interrupt sources are cleared, so that they

+//! no longer assert.  The

+//! ui32IntFlags parameter can be the logical OR of any of the following

+//! values:

+//!

+//! - \b FLASH_INT_ACCESS occurs when a program or erase action was attempted

+//! on a block of flash that is marked as read-only or execute-only.

+//! - \b FLASH_INT_PROGRAM occurs when a programming or erase cycle completes.

+//! - \b FLASH_INT_EEPROM occurs when an EEPROM interrupt occurs. The source of

+//! the EEPROM interrupt can be determined by reading the EEDONE register.

+//! - \b FLASH_INT_VOLTAGE_ERR occurs when the voltage was out of spec during

+//! the flash operation and the operation was terminated.

+//! - \b FLASH_INT_DATA_ERR occurs when an operation attempts to program a bit that

+//! contains a 0 to a 1.

+//! - \b FLASH_INT_ERASE_ERR occurs when an erase operation fails.

+//! - \b FLASH_INT_PROGRAM_ERR occurs when a program operation fails.

+//!

+//! This function must be called in the interrupt handler to keep the

+//! interrupt from being triggered again immediately upon exit.

+//!

+//! \note Because there is a write buffer in the Cortex-M processor, it may

+//! take several clock cycles before the interrupt source is actually cleared.

+//! Therefore, it is recommended that the interrupt source be cleared early in

+//! the interrupt handler (as opposed to the very last action) to avoid

+//! returning from the interrupt handler before the interrupt source is

+//! actually cleared.  Failure to do so may result in the interrupt handler

+//! being immediately reentered (because the interrupt controller still sees

+//! the interrupt source asserted).

+//!

+//! \return None.

+//

+//*****************************************************************************

+void

+FlashIntClear(uint32_t ui32IntFlags)

+{

+    //

+    // Clear the flash interrupt.

+    //

+    HWREG(FLASH_FCMISC) = ui32IntFlags;

+}

+

+//*****************************************************************************

+//

+// Close the Doxygen group.

+//! @}

+//

+//*****************************************************************************