AURIX TC397 Flash编程

Flash编程基础知识

参考 Flash_Programming_1 for KIT_AURIX_TC397_TFT, 本例展示了如何烧写PFLASH(Program Flash memory) 和 DFLASH(Data Flash memory).

数据存储单元(DMU, Data Memory Unit)控制执行在PFLASH和DFLASH上的命令序列, 连接FSI(Flash Standard Interface)和PFI(Programming Flash Interface).
FSI在所有闪存上执行擦除, 编程和验证操作.
PFI为每个PFLASH块与CPU提供唯一的点对点快速连接
TC39x 提供 6 Program Flash Banks(PFx) 和 2 Data Flash Banks(DFx)
TC3xx 具有相同扇区结构的PFLASH块PFx, PFx块大小可能不用: 3/2/1 Mbyte Program Flash Bank
TC39x 有5个3MB大小的PFx(PF0…PF4) 和 1个1MB大小的PF5. 每个PFx被划分为1024KB大小的物理扇区(Physical Sectors), 每个物理扇区又被划分为16KB大小的逻辑扇区(Logical Sectors)
TC39x具有两个数据闪存存储区DFLASH0和DFLASH1, 两者都包括多个通常用于EEPROM仿真的EEPROM扇区. 仅DFLASH0包含用于数据保护的用户配置块(UCBs, User Configuration Blocks)和1个配置扇区(CFS, Configuration Sector), 用户无法直接访问该配置扇区.
DFLASH EEPROM可以配置为单端模式(默认)或补码检测(incomplement sensing). 根据所选模式, 每个扇区的大小分别设置为4KB和2KB
闪存中可以编程的最小数据量是页(Page), 程序闪存(Program Flash)页由32字节组成, 数据闪存(Data Flash)页由8字节组成
仅在擦除操作后才能对页面进行编程
可以执行擦除操作的最小单元是逻辑扇区(Logical Sector)

TC39x Program Flash Memeory:

TC39x Data Flash memory:

所有闪存操作均通过命令序列执行, DMU具有命令序列解释器(CSI, Command Sequence Interpreter)来处理命令序列, 用于对程序闪存或数据闪存进行编程的最小命令序列如下:

擦除逻辑扇区待编程
等待直到闪存就绪(不忙)
进入页面模式
等待直到闪存就绪(不忙)
加载要写入页面的数据
写页面
等待直到闪存内存已准备就绪(不忙)

注：执行PFLASH编程或擦除的代码不应从同一PFLASH执行

PF0…PF5的地址映射为:

Address Range	Size	Description	Read	Write
A000 0000H - A02F FFFFH	3 Mbyte	Program Flash 0 (PF0)	Access	SRIBE
A030 0000H - A05F FFFFH	3 Mbyte	Program Flash 1 (PF1)	Access	SRIBE
A060 0000H - A08F FFFFH	3 Mbyte	Program Flash 2 (PF2)	Access	SRIBE
A090 0000H - A0BF FFFFH	3 Mbyte	Program Flash 3 (PF3)	Access	SRIBE
A0C0 0000H - A0EF FFFFH	3 Mbyte	Program Flash 4 (PF4)	Access	SRIBE
A0F0 0000H - A0FF FFFFH	1 Mbyte	Program Flash 5 (PF5)	Access	SRIBE

其中, SRIBE: A bus access is terminated with a bus error on the SRI(SRI上的总线错误终止总线访问)

DF0…DF1的地址映射为:

Address Range	Size	Description	Read	Write
AF00 0000H - AF0F FFFFH	1 Mbyte	Data Flash 0 EEPROM (DF0) Host Comd. Sequence Interpreter	Access	Access 1)
AF10 0000H - AF3F FFFFH	3 Mbyte	Reserved	SRIBE	SRIBE
AF40 0000H - AF40 5FFFH	24 Kbyte	Data Flash 0 UCB (DF0)	Access	SRIBE
AF40 6000H - AF7F FFFFH	-	Reserved	SRIBE	SRIBE
AF80 0000H - AF80 FFFFH	64 Kbyte	Data Flash 0 CFS (DF0)	Access	SRIBE
AF81 0000H - AFBF FFFFH	-	Reserved	SRIBE	SRIBE
AFC0 0000H - AFC1 FFFFH	128 Kbyte	Data Flash 1 EEPROM (DF1) HSM Comd. Sequence Interpreter	Access	Access 2)

其中:

1. Host Command Sequence Interpreter(主机命令序列解释器)
1. HSM Command Sequence Interpreter(HSM命令序列解释器)

Flash Programming

直接搬运官方的例程来看, 此例中, 程序闪存(PFLASH)的64个字节随后被烧写并验证. 此外, 烧写并验证了64字节的数据闪存(DFLASH). 在进行任何写操作之前, 将擦除闪存, 如果闪存烧写并验证成功, 则将打开每个测试内存的LED.

闪存中可以编程的最小数据量是页(Page), 程序闪存(Program Flash)页由32字节组成, 数据闪存(Data Flash)页由8字节组成, 所以64字节对应PFLASH的2页, DFLASH的8页.

Cpu0_Main.c 代码如下:

#include "Ifx_Types.h"
#include "IfxCpu.h"
#include "IfxScuWdt.h"IFX_ALIGN(4) IfxCpu_syncEvent g_cpuSyncEvent = 0;#include <string.h>
#include "Ifx_Types.h"
#include "IfxFlash.h"
#include "IfxCpu.h"void initLEDs(void);            /* Function that initializes the LEDs                                               */
void writeProgramFlash(void);   /* Function that flashes the Program Flash memory calling the routines from the PSPR*/
void writeDataFlash(void);      /* Function that flashes the Data Flash memory                                      */
void verifyProgramFlash(void);  /* Function that verifies the data written in the Program Flash memory              */
void verifyDataFlash(void);     /* Function that verifies the data written in the Data Flash memory                 */#define PFLASH_PAGE_LENGTH          IFXFLASH_PFLASH_PAGE_LENGTH /* 0x20 = 32 Bytes (smallest unit that can be* programmed in the Program Flash memory (PFLASH)) */
#define DFLASH_PAGE_LENGTH          IFXFLASH_DFLASH_PAGE_LENGTH /* 0x8 = 8 Bytes (smallest unit that can be* programmed in the Data Flash memory (DFLASH))    */
#define FLASH_MODULE                0                           /* Macro to select the flash (PMU) module           */
#define PROGRAM_FLASH_0             IfxFlash_FlashType_P0       /* Define the Program Flash Bank to be used         */
#define DATA_FLASH_0                IfxFlash_FlashType_D0       /* Define the Data Flash Bank to be used            */#define DATA_TO_WRITE               0x07738135                  /* Dummy data to be written into the Flash memories */#define PFLASH_STARTING_ADDRESS     0xA00E0000                  /* Address of the PFLASH where the data is written  */
#define DFLASH_STARTING_ADDRESS     0xAF000000                  /* Address of the DFLASH where the data is written  */#define PFLASH_NUM_PAGE_TO_FLASH    2                           /* Number of pages to flash in the PFLASH           */
#define PFLASH_NUM_SECTORS          1                           /* Number of PFLASH sectors to be erased            */
#define DFLASH_NUM_PAGE_TO_FLASH    8                           /* Number of pages to flash in the DFLASH           */
#define DFLASH_NUM_SECTORS          1                           /* Number of DFLASH sectors to be erased            *//* Reserved space for erase and program routines in bytes */
#define ERASESECTOR_LEN             (100)
#define WAITUNBUSY_LEN              (100)
#define ENTERPAGEMODE_LEN           (100)
#define LOADPAGE2X32_LEN            (100)
#define WRITEPAGE_LEN               (100)
#define ERASEPFLASH_LEN             (0x100)
#define WRITEPFLASH_LEN             (0x200)/* Relocation address for the erase and program routines: Program Scratch-Pad SRAM (PSPR) of CPU0 */
#define RELOCATION_START_ADDR       (0x70100000U)/* Definition of the addresses where to relocate the erase and program routines, given their reserved space */
#define ERASESECTOR_ADDR            (RELOCATION_START_ADDR)
#define WAITUNBUSY_ADDR             (ERASESECTOR_ADDR + ERASESECTOR_LEN)
#define ENTERPAGEMODE_ADDR          (WAITUNBUSY_ADDR + WAITUNBUSY_LEN)
#define LOAD2X32_ADDR               (ENTERPAGEMODE_ADDR + ENTERPAGEMODE_LEN)
#define WRITEPAGE_ADDR              (LOAD2X32_ADDR + LOADPAGE2X32_LEN)
#define ERASEPFLASH_ADDR            (WRITEPAGE_ADDR + WRITEPAGE_LEN)
#define WRITEPFLASH_ADDR            (ERASEPFLASH_ADDR + ERASEPFLASH_LEN)/* Definition of the LEDs port pins */
#define LED1                        &MODULE_P13,0               /* LED connected to Port 13, Pin 0                  */
#define LED2                        &MODULE_P13,1               /* LED connected to Port 13, Pin 1                  */#define MEM(address)                *((uint32 *)(address))      /* Macro to simplify the access to a memory address *//*********************************************************************************************************************/
/*------------------------------------------------Function Prototypes------------------------------------------------*/
/*********************************************************************************************************************/
void erasePFLASH(uint32 sectorAddr);
void writePFLASH(uint32 startingAddr);
void copyFunctionsToPSPR(void);typedef struct
{void (*eraseSectors)(uint32 sectorAddr, uint32 numSector);uint8 (*waitUnbusy)(uint32 flash, IfxFlash_FlashType flashType);uint8 (*enterPageMode)(uint32 pageAddr);void (*load2X32bits)(uint32 pageAddr, uint32 wordL, uint32 wordU);void (*writePage)(uint32 pageAddr);void (*eraseFlash)(uint32 sectorAddr);void (*writeFlash)(uint32 startingAddr);
} Function;/*********************************************************************************************************************/
/*-------------------------------------------------Global variables--------------------------------------------------*/
/*********************************************************************************************************************/
Function g_commandFromPSPR;/*********************************************************************************************************************/
/*---------------------------------------------Function Implementations----------------------------------------------*/
/*********************************************************************************************************************/
/* Function to initialize the LEDs */
void initLEDs()
{/* Configure LED1 and LED2 port pins */IfxPort_setPinMode(LED1, IfxPort_Mode_outputPushPullGeneral);IfxPort_setPinMode(LED2, IfxPort_Mode_outputPushPullGeneral);/* Turn off the LEDs (LEDs are low-level active) */IfxPort_setPinState(LED1, IfxPort_State_high);IfxPort_setPinState(LED2, IfxPort_State_high);
}/* This function copies the erase and program routines to the Program Scratch-Pad SRAM (PSPR) of the CPU0 and assigns* function pointers to them.*/
void copyFunctionsToPSPR()
{/* Copy the IfxFlash_eraseMultipleSectors() routine and assign it to a function pointer */memcpy((void *)ERASESECTOR_ADDR, (const void *)IfxFlash_eraseMultipleSectors, ERASESECTOR_LEN);g_commandFromPSPR.eraseSectors = (void *)ERASESECTOR_ADDR;/* Copy the IfxFlash_waitUnbusy() routine and assign it to a function pointer */memcpy((void *)WAITUNBUSY_ADDR, (const void *)IfxFlash_waitUnbusy, WAITUNBUSY_LEN);g_commandFromPSPR.waitUnbusy = (void *)WAITUNBUSY_ADDR;/* Copy the IfxFlash_enterPageMode() routine and assign it to a function pointer */memcpy((void *)ENTERPAGEMODE_ADDR, (const void *)IfxFlash_enterPageMode, ENTERPAGEMODE_LEN);g_commandFromPSPR.enterPageMode = (void *)ENTERPAGEMODE_ADDR;/* Copy the IfxFlash_loadPage2X32() routine and assign it to a function pointer */memcpy((void *)LOAD2X32_ADDR, (const void *)IfxFlash_loadPage2X32, LOADPAGE2X32_LEN);g_commandFromPSPR.load2X32bits = (void *)LOAD2X32_ADDR;/* Copy the IfxFlash_writePage() routine and assign it to a function pointer */memcpy((void *)WRITEPAGE_ADDR, (const void *)IfxFlash_writePage, WRITEPAGE_LEN);g_commandFromPSPR.writePage = (void *)WRITEPAGE_ADDR;/* Copy the erasePFLASH() routine and assign it to a function pointer */memcpy((void *)ERASEPFLASH_ADDR, (const void *)erasePFLASH, ERASEPFLASH_LEN);g_commandFromPSPR.eraseFlash = (void *)ERASEPFLASH_ADDR;/* Copy the erasePFLASH() routine and assign it to a function pointer */memcpy((void *)WRITEPFLASH_ADDR, (const void *)writePFLASH, WRITEPFLASH_LEN);g_commandFromPSPR.writeFlash = (void *)WRITEPFLASH_ADDR;
}/* This function erases a given sector of the Program Flash memory. The function is copied in the PSPR through* copyFunctionsToPSPR(). Because of this, inside the function, only routines from the PSPR or inline functions* can be called, otherwise a Context Type (CTYP) trap can be triggered.*/
void erasePFLASH(uint32 sectorAddr)
{/* Get the current password of the Safety WatchDog module */uint16 endInitSafetyPassword = IfxScuWdt_getSafetyWatchdogPasswordInline();/* Erase the sector */IfxScuWdt_clearSafetyEndinitInline(endInitSafetyPassword);      /* Disable EndInit protection                   */g_commandFromPSPR.eraseSectors(sectorAddr, PFLASH_NUM_SECTORS); /* Erase the given sector                       */IfxScuWdt_setSafetyEndinitInline(endInitSafetyPassword);        /* Enable EndInit protection                    *//* Wait until the sector is erased */g_commandFromPSPR.waitUnbusy(FLASH_MODULE, PROGRAM_FLASH_0);
}/* This function writes the Program Flash memory. The function is copied in the PSPR through copyFunctionsToPSPR().* Because of this, inside the function, only routines from the PSPR or inline functions can be called,* otherwise a Context Type (CTYP) trap can be triggered.*/
void writePFLASH(uint32 startingAddr)
{uint32 page;                                                /* Variable to cycle over all the pages             */uint32 offset;                                              /* Variable to cycle over all the words in a page   *//* Get the current password of the Safety WatchDog module */uint16 endInitSafetyPassword = IfxScuWdt_getSafetyWatchdogPasswordInline();/* Write all the pages */for(page = 0; page < PFLASH_NUM_PAGE_TO_FLASH; page++)              /* Loop over all the pages                  */{uint32 pageAddr = startingAddr + (page * PFLASH_PAGE_LENGTH);   /* Get the address of the page              *//* Enter in page mode */g_commandFromPSPR.enterPageMode(pageAddr);/* Wait until page mode is entered */g_commandFromPSPR.waitUnbusy(FLASH_MODULE, PROGRAM_FLASH_0);/* Write 32 bytes (8 double words) into the assembly buffer */for(offset = 0; offset < PFLASH_PAGE_LENGTH; offset += 0x8)     /* Loop over the page length                */{g_commandFromPSPR.load2X32bits(pageAddr, DATA_TO_WRITE, DATA_TO_WRITE); /* Load 2 words of 32 bits each */}/* Write the page */IfxScuWdt_clearSafetyEndinitInline(endInitSafetyPassword);      /* Disable EndInit protection               */g_commandFromPSPR.writePage(pageAddr);                          /* Write the page                           */IfxScuWdt_setSafetyEndinitInline(endInitSafetyPassword);        /* Enable EndInit protection                *//* Wait until the page is written in the Program Flash memory */g_commandFromPSPR.waitUnbusy(FLASH_MODULE, PROGRAM_FLASH_0);}
}/* This function flashes the Program Flash memory calling the routines from the PSPR */
void writeProgramFlash()
{boolean interruptState = IfxCpu_disableInterrupts(); /* Get the current state of the interrupts and disable them*//* Copy all the needed functions to the PSPR memory to avoid overwriting them during the flash execution */copyFunctionsToPSPR();/* Erase the Program Flash sector before writing */g_commandFromPSPR.eraseFlash(PFLASH_STARTING_ADDRESS);/* Write the Program Flash */g_commandFromPSPR.writeFlash(PFLASH_STARTING_ADDRESS);IfxCpu_restoreInterrupts(interruptState);            /* Restore the interrupts state                            */
}/* This function verifies if the data has been correctly written in the Program Flash */
void verifyProgramFlash()
{uint32 page;                                                /* Variable to cycle over all the pages             */uint32 offset;                                              /* Variable to cycle over all the words in a page   */uint32 errors = 0;                                          /* Variable to keep record of the errors            *//* Verify the written data */for(page = 0; page < PFLASH_NUM_PAGE_TO_FLASH; page++)                          /* Loop over all the pages      */{uint32 pageAddr = PFLASH_STARTING_ADDRESS + (page * PFLASH_PAGE_LENGTH);    /* Get the address of the page  */for(offset = 0; offset < PFLASH_PAGE_LENGTH; offset += 0x4)                 /* Loop over the page length    */{/* Check if the data in the Program Flash is correct */if(MEM(pageAddr + offset) != DATA_TO_WRITE){/* If not, count the found errors */errors++;}}}/* If the data is correct, turn on the LED1 */if(errors == 0){IfxPort_setPinState(LED1, IfxPort_State_low);}
}/* This function flashes the Data Flash memory.* It is not needed to run this function from the PSPR, thus functions from the Program Flash memory can be called* inside.*/
void writeDataFlash()
{uint32 page;                                                /* Variable to cycle over all the pages             *//* --------------- ERASE PROCESS --------------- *//* Get the current password of the Safety WatchDog module */uint16 endInitSafetyPassword = IfxScuWdt_getSafetyWatchdogPassword();/* Erase the sector */IfxScuWdt_clearSafetyEndinit(endInitSafetyPassword);        /* Disable EndInit protection                       */IfxFlash_eraseMultipleSectors(DFLASH_STARTING_ADDRESS, DFLASH_NUM_SECTORS); /* Erase the given sector           */IfxScuWdt_setSafetyEndinit(endInitSafetyPassword);          /* Enable EndInit protection                        *//* Wait until the sector is erased */IfxFlash_waitUnbusy(FLASH_MODULE, DATA_FLASH_0);/* --------------- WRITE PROCESS --------------- */for(page = 0; page < DFLASH_NUM_PAGE_TO_FLASH; page++)      /* Loop over all the pages                          */{uint32 pageAddr = DFLASH_STARTING_ADDRESS + (page * DFLASH_PAGE_LENGTH); /* Get the address of the page     *//* Enter in page mode */IfxFlash_enterPageMode(pageAddr);/* Wait until page mode is entered */IfxFlash_waitUnbusy(FLASH_MODULE, DATA_FLASH_0);/* Load data to be written in the page */IfxFlash_loadPage2X32(pageAddr, DATA_TO_WRITE, DATA_TO_WRITE); /* Load two words of 32 bits each            *//* Write the loaded page */IfxScuWdt_clearSafetyEndinit(endInitSafetyPassword);    /* Disable EndInit protection                       */IfxFlash_writePage(pageAddr);                           /* Write the page                                   */IfxScuWdt_setSafetyEndinit(endInitSafetyPassword);      /* Enable EndInit protection                        *//* Wait until the data is written in the Data Flash memory */IfxFlash_waitUnbusy(FLASH_MODULE, DATA_FLASH_0);}
}/* This function verifies if the data has been correctly written in the Data Flash */
void verifyDataFlash()
{uint32 page;                                                /* Variable to cycle over all the pages             */uint32 offset;                                              /* Variable to cycle over all the words in a page   */uint32 errors = 0;                                          /* Variable to keep record of the errors            *//* Verify the written data */for(page = 0; page < DFLASH_NUM_PAGE_TO_FLASH; page++)                          /* Loop over all the pages      */{uint32 pageAddr = DFLASH_STARTING_ADDRESS + (page * DFLASH_PAGE_LENGTH);    /* Get the address of the page  */for(offset = 0; offset < DFLASH_PAGE_LENGTH; offset += 0x4)                 /* Loop over the page length    */{/* Check if the data in the Data Flash is correct */if(MEM(pageAddr + offset) != DATA_TO_WRITE){/* If not, count the found errors */errors++;}}}/* If the data is correct, turn on the LED2 */if(errors == 0){IfxPort_setPinState(LED2, IfxPort_State_low);}
}void core0_main(void)
{IfxCpu_enableInterrupts();/* !!WATCHDOG0 AND SAFETY WATCHDOG ARE DISABLED HERE!!* Enable the watchdogs and service them periodically if it is required*/IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());IfxScuWdt_disableSafetyWatchdog(IfxScuWdt_getSafetyWatchdogPassword());/* Wait for CPU sync event */IfxCpu_emitEvent(&g_cpuSyncEvent);IfxCpu_waitEvent(&g_cpuSyncEvent, 1);/* Initialize the LEDs */initLEDs();/* Flash the Program Flash memory and verify the written data */writeProgramFlash();verifyProgramFlash();/* Flash the Data Flash memory and verify the written data */writeDataFlash();verifyDataFlash();while(1){}
}

编译运行程序, 两个LED亮表示Flash操作成功.

在擦除和写PFLASH后面各打一个断点:

调试运行, Memory窗口中, 添加地址0xA00E0000, Resume程序, 第一个断点停止, 将显示0或0xEEEEEEEE, 因为它无法读取已擦除的内存, 再Resume, 第二个断点停止后, 应显示64个字节, 内容为0x07738135 :

同理, DFLASH查看地址0xAF000000:

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