MPC5744P內部Flash相當大，除了存儲代碼，多余的空間還可以另作它用，例如參數存儲，故障存儲，當然，Bootloader也是依賴于Flash讀寫。

內部Flash的結構請參考上一篇關于Flash結構及啟動原理的說明：https://blog.csdn.net/u010875635/article/details/85162135

讀?。阂淮巫x取256位。

擦除：一次擦除一個block，無論是16KB、32KB、64KB抑或256KB

編程：內置flash存儲可以通過word(32bits)或者double words(64bits)尋址編程，多個word或double words填充編程頁緩存(256bits)，使能page編程（256bits，4個double words）或者quadpage編程（1024bits，16個double words）。推薦的編程操作從64bits到1024bits，并且64bits對齊。

flash讀寫示例：https://download.csdn.net/download/u010875635/10872302

建議將示例中的Flash_Check_g注釋掉，以便于支持2個32位數據編程，//ret = Flash_Check_g(startAddr,endAddr);

注意：

1、每組數據不能超過1024bits，否則會被截掉。

2、若是當前程序運行，則此partition不能被擦除，否則會死機。

MPC5744P的Flash按照地址空間分為LOW、MID、HIGH、First256K、Second256K（沒有這么多256K空間，因此Second實際上一直是空的）。

編程Flash的步驟如下：

1、激活主地址空間

2、解鎖對應Block

3、擦除對應Block

4、編程對應Block

我們在Processor Expert中添加flash_c551:flash_css模塊，然后生成代碼

解鎖、擦除、編程、讀取等操作函數如下：

flash.h

#ifndef _DRIVER_FLASH_FLASH_H_

#define _DRIVER_FLASH_FLASH_H_

#include "flash_c55_driver.h"

//get addressrage select block

flash_block_select_t Flash_GetSelectBlock(uint32_t startAddr, uint32_t endAddr);

status_t Flash_Unlock_g(uint32_t startAddr, uint32_t endAddr);

status_t Flash_Erase_g(uint32_t startAddr, uint32_t endAddr);

status_t Flash_Check_g(uint32_t startAddr, uint32_t endAddr);

status_t Flash_Program_g(uint32_t startAddr, uint32_t endAddr, uint32_t *buffer, uint32_t len);

status_t Flash_Lock_g(uint32_t startAddr, uint32_t endAddr);

uint32_t Flash_Read_g(uint32_t addr);

#endif /* End of (__BLOCK_MPC57XX__) */

flash.c

#include "Drivers/Flash/flash.h"

/***************************************

 * Flash Block Range

：

// LOW--not program, partition 0 and 1

0x00800000-0x00803FFF -- 16KB,EEPROM-low block0, RWW_P:0

0x00804000-0x00807FFF -- 16KB,EEPROM-low block1, RWW_P:0

0x00F98000-0x00F9BFFF -- 16KB,low flash memory block2, RWW_P:1

0x00F9C000-0x00F9FFFF -- 16KB,low flash memory block3, RWW_P:1

// MID , partition 2 and 3

0x00808000-0x0080FFFF -- 32KB,EEPROM-mid block0, RWW_P:2

0x00810000-0x00817FFF -- 32KB,EEPROM-mid block1, RWW_P:3

//HIGH, , partition 4 and 5

0x00FA0000-0x00FAFFFF -- 64KB,high flash memory block0, RWW_P:4

0x00FB0000-0x00FBFFFF -- 64KB,high flash memory block1, RWW_P:4

0x00FC0000-0x00FCFFFF -- 64KB,high flash memory block2, RWW_P:4

0x00FD0000-0x00FDFFFF -- 64KB,high flash memory block3, RWW_P:5

0x00FE0000-0x00FEFFFF -- 64KB,high flash memory block4, RWW_P:5

0x00FF0000-0x00FFFFFF -- 64KB,high flash memory block5, RWW_P:5

//256K--all used

0x01000000-0x0103FFFF -- 256KB,256k flash memory block0, RWW_P:6

0x01040000-0x0107FFFF -- 256KB,256k flash memory block1, RWW_P:6

0x01080000-0x010BFFFF -- 256KB,256k flash memory block2, RWW_P:6

0x010C0000-0x010FFFFF -- 256KB,256k flash memory block3, RWW_P:6

0x01100000-0x0113FFFF -- 256KB,256k flash memory block4, RWW_P:7

0x01140000-0x0117FFFF -- 256KB,256k flash memory block5, RWW_P:7

0x01180000-0x011BFFFF -- 256KB,256k flash memory block6, RWW_P:7

0x011C0000-0x011FFFFF -- 256KB,256k flash memory block7, RWW_P:7

 **************************************/

#define FLASH_TOTAL_BLOCKCOUNT 20

#define FLASH_LOWPART_BLOCKCOUNT 4

#define FLASH_MIDPART_BLOCKCOUNT 2

#define FLASH_HIGHPART_BLOCKCOUNT 6

#define FLASH_256KPART_BLOCKCOUNT 8

//low

#define FLASH_BLOCKPART_LOW_BLOCKNUM_0_START 0x00800000

#define FLASH_BLOCKPART_LOW_BLOCKNUM_0_END 0x00803FFF

#define FLASH_BLOCKPART_LOW_BLOCKNUM_1_START 0x00804000

#define FLASH_BLOCKPART_LOW_BLOCKNUM_1_END 0x00807FFF

#define FLASH_BLOCKPART_LOW_BLOCKNUM_2_START 0x00F98000

#define FLASH_BLOCKPART_LOW_BLOCKNUM_2_END 0x00F9BFFF

#define FLASH_BLOCKPART_LOW_BLOCKNUM_3_START 0x00F9C000

#define FLASH_BLOCKPART_LOW_BLOCKNUM_3_END 0x00F9FFFF

//mid

#define FLASH_BLOCKPART_MID_BLOCKNUM_0_START 0x00808000

#define FLASH_BLOCKPART_MID_BLOCKNUM_0_END 0x0080FFFF

#define FLASH_BLOCKPART_MID_BLOCKNUM_1_START 0x00810000

#define FLASH_BLOCKPART_MID_BLOCKNUM_1_END 0x00817FFF

//high

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_0_START 0x00FA0000

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_0_END 0x00FAFFFF

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_1_START 0x00FB0000

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_1_END 0x00FBFFFF

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_2_START 0x00FC0000

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_2_END 0x00FCFFFF

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_3_START 0x00FD0000

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_3_END 0x00FDFFFF

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_4_START 0x00FE0000

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_4_END 0x00FEFFFF

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_5_START 0x00FF0000

#define FLASH_BLOCKPART_HIGH_BLOCKNUM_5_END 0x00FFFFFF

//256k

#define FLASH_BLOCKPART_256K_BLOCKNUM_0_START 0x01000000

#define FLASH_BLOCKPART_256K_BLOCKNUM_0_END 0x0103FFFF

#define FLASH_BLOCKPART_256K_BLOCKNUM_1_START 0x01040000

#define FLASH_BLOCKPART_256K_BLOCKNUM_1_END 0x0107FFFF

#define FLASH_BLOCKPART_256K_BLOCKNUM_2_START 0x01080000

#define FLASH_BLOCKPART_256K_BLOCKNUM_2_END 0x010BFFFF

#define FLASH_BLOCKPART_256K_BLOCKNUM_3_START 0x010C0000

#define FLASH_BLOCKPART_256K_BLOCKNUM_3_END 0x010FFFFF

#define FLASH_BLOCKPART_256K_BLOCKNUM_4_START 0x01100000

#define FLASH_BLOCKPART_256K_BLOCKNUM_4_END 0x0113FFFF

#define FLASH_BLOCKPART_256K_BLOCKNUM_5_START 0x01140000

#define FLASH_BLOCKPART_256K_BLOCKNUM_5_END 0x0117FFFF

#define FLASH_BLOCKPART_256K_BLOCKNUM_6_START 0x01180000

#define FLASH_BLOCKPART_256K_BLOCKNUM_6_END 0x011BFFFF

#define FLASH_BLOCKPART_256K_BLOCKNUM_7_START 0x011C0000

#define FLASH_BLOCKPART_256K_BLOCKNUM_7_END 0x011FFFFF

/* Lock State , shift is in the setlock function*/

#define LOCK_LOW_BLOCKS               0x00003FFFU  //lock0

#define LOCK_MID_BLOCKS               0x0000FFFFU  //lock0

#define LOCK_HIGH_BLOCKS              0x0000FFFFU  //lock1

#define LOCK_FIRST256_BLOCKS          0xFFFFFFFFU  //lock2

//#define UNLOCK_SECOND256_BLOCKS         0x0000FFFFU  //lock3

#define UNLOCK_LOW_BLOCKS               0x00000000U

#define UNLOCK_MID_BLOCKS               0x00000000U

#define UNLOCK_HIGH_BLOCKS              0x00000000U

#define UNLOCK_FIRST256_BLOCKS          0x00000000U

//#define UNLOCK_SECOND256_BLOCKS         0x00000000U

#define NUMBER_OF_WORD_BLANK_CHECK      0x90

#define NUMBER_OF_WORD_PGM_VERIFY       0x80

#define NUMBER_OF_WORD_CHECK_SUM        0x120

/* Platform Flash */

#define FLASH_FMC                       PFLASH_BASE

#define FLASH_PFCR1                     0x000000000U

#define FLASH_PFCR2                     0x000000004U

#define FLASH_FMC_BFEN_MASK             0x000000001U

//Block part and number structure

typedef struct

{

uint32_t BlockPart; //Low,Mid,High or 256K

uint32_t BlockNum; //Block 0...n

}Flash_BlockPartAndNum;

uint32_t Flash_Block_Lock[4]={

LOCK_LOW_BLOCKS

,LOCK_MID_BLOCKS

,LOCK_HIGH_BLOCKS

,LOCK_FIRST256_BLOCKS

};

uint32_t Flash_Block_UnLock[4]={

UNLOCK_LOW_BLOCKS

,UNLOCK_MID_BLOCKS

,UNLOCK_HIGH_BLOCKS

,UNLOCK_FIRST256_BLOCKS

};

//every part block count

uint32_t Flash_Block_Count[4]={

FLASH_LOWPART_BLOCKCOUNT

,FLASH_MIDPART_BLOCKCOUNT

,FLASH_HIGHPART_BLOCKCOUNT

,FLASH_256KPART_BLOCKCOUNT

};

//low space block start array

uint32_t Flash_Block_Low_Start_Array[FLASH_LOWPART_BLOCKCOUNT]={

FLASH_BLOCKPART_LOW_BLOCKNUM_0_START

,FLASH_BLOCKPART_LOW_BLOCKNUM_1_START

    ,FLASH_BLOCKPART_LOW_BLOCKNUM_2_START

    ,FLASH_BLOCKPART_LOW_BLOCKNUM_3_START

};

//mid space block start array

uint32_t Flash_Block_Mid_Start_Array[FLASH_MIDPART_BLOCKCOUNT]={

//mid

    FLASH_BLOCKPART_MID_BLOCKNUM_0_START

    ,FLASH_BLOCKPART_MID_BLOCKNUM_1_START

};

//high space block start array

uint32_t Flash_Block_High_Start_Array[FLASH_HIGHPART_BLOCKCOUNT]={

//high

    FLASH_BLOCKPART_HIGH_BLOCKNUM_0_START

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_1_START

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_2_START

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_3_START

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_4_START

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_5_START

};

//256k space block start array

uint32_t Flash_Block_256K_Start_Array[FLASH_256KPART_BLOCKCOUNT]={

//256k

    FLASH_BLOCKPART_256K_BLOCKNUM_0_START

    ,FLASH_BLOCKPART_256K_BLOCKNUM_1_START

    ,FLASH_BLOCKPART_256K_BLOCKNUM_2_START

    ,FLASH_BLOCKPART_256K_BLOCKNUM_3_START

    ,FLASH_BLOCKPART_256K_BLOCKNUM_4_START

    ,FLASH_BLOCKPART_256K_BLOCKNUM_5_START

    ,FLASH_BLOCKPART_256K_BLOCKNUM_6_START

    ,FLASH_BLOCKPART_256K_BLOCKNUM_7_START

};

//low space block end array

uint32_t Flash_Block_Low_End_Array[FLASH_LOWPART_BLOCKCOUNT]={

FLASH_BLOCKPART_LOW_BLOCKNUM_0_END

,FLASH_BLOCKPART_LOW_BLOCKNUM_1_END

    ,FLASH_BLOCKPART_LOW_BLOCKNUM_2_END

    ,FLASH_BLOCKPART_LOW_BLOCKNUM_3_END

};

//mid space block end array

uint32_t Flash_Block_Mid_End_Array[FLASH_MIDPART_BLOCKCOUNT]={

//mid

    FLASH_BLOCKPART_MID_BLOCKNUM_0_END

    ,FLASH_BLOCKPART_MID_BLOCKNUM_1_END

};

//high space block end array

uint32_t Flash_Block_High_End_Array[FLASH_HIGHPART_BLOCKCOUNT]={

//high

    FLASH_BLOCKPART_HIGH_BLOCKNUM_0_END

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_1_END

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_2_END

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_3_END

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_4_END

    ,FLASH_BLOCKPART_HIGH_BLOCKNUM_5_END