请教大家KE02写Flash问题

发表于 2015-5-27 17:28

又遇到新问题了。。。
我写了段程序，计算Flash CRC16校验码，存放在最后2 Byte位置，以后开机时做Flash自检用的。在向Flash写入校验码这一段，单步能运行下去，连续运行就不对了，不知是何原因？下面是程序。

//****************************************
// Sub:       fFlash_init
// Parameter:
// Return:
// Funktion:    initialize flash driver
//****************************************
void fFlash_init(void){
SIM_SCGC |= SIM_SCGC_FLASH_MASK;
if(!(FTMRH->FCLKDIV & FTMRH_FCLKDIV_FDIVLD_MASK)){ // FCLKDIV register has not been written since the last reset
FTMRH->FCLKDIV |= 0x7; //divide 8MHz BUSCLK down to 1MHz
FTMRH->FCLKDIV |= FTMRH_FCLKDIV_FDIVLCK_MASK; // lock the prescaler
}
}

//****************************************
// Sub:       fFlash_EraseSector
// Parameter: sector number to be erased
// Return:
// Funktion:    erase flash sector, each flash sector is of 512 bytes long
//****************************************
void fFlash_EraseSector(unsigned char SectorNo){
FTMRH->FSTAT = 0x30; // Clear error flags

FTMRH->FCCOBIX = 0x0; // Write index to specify the command code to be loaded
FTMRH->FCCOBHI = _FLASH_CMD_ERASE_SECTOR; // Write command code
FTMRH->FCCOBLO = 0; // memory address bits[23:16]

FTMRH->FCCOBIX = 0x1; // Write index to specify the lower byte memory address bits[15:0] to be loaded
FTMRH->FCCOBLO = SectorNo * _FLASH_SECTOR_SIZE - 1; // Write the lower byte memory address bits[15:0]
FTMRH->FCCOBHI = (SectorNo * _FLASH_SECTOR_SIZE - 1) >> 8;

FTMRH->FSTAT = 0x80; // launch the command
while (!(FTMRH->FSTAT & FTMRH_FSTAT_CCIF_MASK)); // Wait till command is completed
}

//****************************************
// Sub:       fFlash_WriteChecksum
// Parameter: word programming data
// Return:
// Funktion:    program checksum to the last 2 bytes of flash
//****************************************
void fFlash_WriteChecksum(unsigned short crc){
FTMRH_FSTAT |= 0x30; //clear error flags

FTMRH->FCCOBIX = 0x0; //write index to specify the command code to be loaded
FTMRH->FCCOBHI = _FLASH_CMD_PROGRAM; //program FLASH command
FTMRH->FCCOBLO = 0x00; //target address bits[23:16]

FTMRH->FCCOBIX = 0x1; //Write index to specify the lower byte memory address bits[15:0] to be loaded
FTMRH->FCCOBLO = 0xfc;
FTMRH->FCCOBHI = 0xff;

FTMRH->FCCOBIX = 0x2; // Write index to specify the word0 (MSB word) to be programmed
FTMRH->FCCOBHI = 0xff;
FTMRH->FCCOBLO = 0xff;

FTMRH->FCCOBIX = 0x3; // Write index to specify the word1 (LSB word) to be programmed
FTMRH->FCCOBHI = crc;
FTMRH->FCCOBLO = crc >> 8;

FTMRH->FSTAT = 0x80; //launch the command
while (!(FTMRH->FSTAT & FTMRH_FSTAT_CCIF_MASK)); //Wait till command is completed
}

我函数调用的顺序是先init再erase然后write。单步运行能够顺利写入，数据再读出来看也是对的。连续运行时程序会卡在fFlashWrite_Checksum的最后两句也就是启动写操作以及等待操作完成，而且程序是进入了一个系统文件startup_ARMLtdGCC.S，这个文件里面我看了是一些系统reset的设置。不明白怎么会运行到这边，我的设置有什么问题吗？请大家帮忙看看，谢谢了！

发表于 2015-5-27 22:59

明天上午帮你看看

发表于 2015-5-28 09:25

我建议你可以先参考FRDM-KE02提供的sample code package中Flash例程
sample code package下载链接如下：
http://www.freescale.com/zh-Hans ... ab=Design_Tools_Tab

发表于 2015-5-28 14:23

本帖最后由 summer_zq 于 2015-5-28 14:36 编辑

FSL_TICS_Jeremy 发表于 2015-5-28 09:25
我建议你可以先参考FRDM-KE02提供的sample code package中Flash例程
sample code package下载链接如下：
ht ...

就是按例程写的，关键步骤都差不多。现在情况就是单步运行一切正常，连续运行的话执行到那两句就跑飞到startup_ARMLtdGCC.S里面去了，卡住位置的语句是:
#ifndef __NO_SYSTEM_INIT
// Low-level system initialise must be done here so to avoid WDOG timeout
bl SystemInitLowLevel
#endif
为啥单步好好的连续就异常了呢，我看了延时什么的都加上了的，这不科学。。。

发表于 2015-5-28 17:00

1. 你的代码好像没有严格遵照flash command 执行步骤，请参考以下下方的代码：

复制

uint16_t Flash_Program2LongWords(uint32_t wNVMTargetAddress, uint32_t dwData0, uint32_t dwData1)

{

        uint16_t err = FLASH_ERR_SUCCESS;

        

        // Check address to see if it is aligned to 4 bytes

        // Global address [1:0] must be 00.

        if(wNVMTargetAddress & 0x03)

        {

                err = FLASH_ERR_INVALID_PARAM;

                return (err);

        }

        // Clear error flags

        FTMRH_FSTAT = 0x30;

        

        // Write index to specify the command code to be loaded

        FTMRH_FCCOBIX = 0x0;

        // Write command code and memory address bits[23:16]        

        FTMRH_FCCOBHI = FLASH_CMD_PROGRAM;// program FLASH command

        FTMRH_FCCOBLO = wNVMTargetAddress>>16;// memory address bits[23:16]

        // Write index to specify the lower byte memory address bits[15:0] to be loaded

        FTMRH_FCCOBIX = 0x1;

        // Write the lower byte memory address bits[15:0]

        FTMRH_FCCOBLO = wNVMTargetAddress;

        FTMRH_FCCOBHI = wNVMTargetAddress>>8;

        

        // Write index to specify the word0 (MSB word) to be programmed

        FTMRH_FCCOBIX = 0x2;

        // Write the word 0

#if     defined(BIG_ENDIAN)                

        //FTMRH_FCCOB = (dwData0>>16) & 0xFFFF;

        FTMRH_FCCOBHI = (dwData0>>16)>>8;

        FTMRH_FCCOBLO = (dwData0>>16);

        

        // Write index to specify the word1 (LSB word) to be programmed

        FTMRH_FCCOBIX = 0x3;

        // Write word 1

        //FTMRH_FCCOB = (dwData0) & 0xFFFF;

        FTMRH_FCCOBHI = (dwData0) >>8;

        FTMRH_FCCOBLO = (dwData0);

        

        // Write index to specify the word0 (MSB word) to be programmed

        FTMRH_FCCOBIX = 0x4;

        // Write the word2

        //FTMRH_FCCOB = (dwData1>>16) & 0xFFFF;

        FTMRH_FCCOBHI = (dwData1>>16)>>8;

        FTMRH_FCCOBLO = (dwData1>>16);

        

        // Write index to specify the word1 (LSB word) to be programmed

        FTMRH_FCCOBIX = 0x5;

        // Write word 3

        //FTMRH_FCCOB = (dwData1) & 0xFFFF;

        FTMRH_FCCOBHI = (dwData1) >>8;

        FTMRH_FCCOBLO = (dwData1);

#else

        //FTMRH_FCCOB = (dwData0) & 0xFFFF;

        FTMRH_FCCOBHI = (dwData0) >>8;

        FTMRH_FCCOBLO = (dwData0);

        

        // Write index to specify the word1 (LSB word) to be programmed

        FTMRH_FCCOBIX = 0x3;

        // Write word 1

        FTMRH_FCCOBHI = (dwData0>>16)>>8;

        FTMRH_FCCOBLO = (dwData0>>16);

        

        // Write index to specify the word0 (MSB word) to be programmed

        FTMRH_FCCOBIX = 0x4;

        // Write the word2

        //FTMRH_FCCOB = (dwData1) & 0xFFFF;

        FTMRH_FCCOBHI = (dwData1) >>8;

        FTMRH_FCCOBLO = (dwData1);        

        

        // Write index to specify the word1 (LSB word) to be programmed

        FTMRH_FCCOBIX = 0x5;

        // Write word 3

        //FTMRH_FCCOB = (dwData1>>16) & 0xFFFF;

        FTMRH_FCCOBHI = (dwData1>>16)>>8;

        FTMRH_FCCOBLO = (dwData1>>16);

#endif

        // Launch the command

        FTMRH_LaunchCMD(TRUE);

        

        // Check error status

        if(FTMRH_FSTAT & FTMRH_FSTAT_ACCERR_MASK)

        {

                err |= FLASH_ERR_ACCESS;

        }

        if(FTMRH_FSTAT & FTMRH_FSTAT_FPVIOL_MASK)

        {

                err |= FLASH_ERR_PROTECTION;                

        }

        if(FTMRH_FSTAT & FTMRH_FSTAT_MGSTAT0_MASK)

        {

                err |= FLASH_ERR_MGSTAT0;                

        }

        if(FTMRH_FSTAT & FTMRH_FSTAT_MGSTAT1_MASK)

        {

                err |= FLASH_ERR_MGSTAT1;                

        }        

        

        return (err);

}

2.还有在program byte之前，确保该区域处于erase 状态，这在参考手册有注明

发表于 2015-5-28 18:25

FSL_TICS_Jeremy 发表于 2015-5-28 17:00
1. 你的代码好像没有严格遵照flash command 执行步骤，请参考以下下方的代码：

这样看代码真的舒服多了

发表于 2015-5-28 22:51

没有遇到过你说的问题呢，帮你顶一下吧

发表于 2015-6-5 09:57

非常感谢你关于Kinetis的技术问题。如果你没有其他问题，我们将此帖默认为已解决.

发表于 2015-7-1 20:24

知道怎么回事了，有相同问题的可参考https://community.freescale.com/docs/DOC-103951

发表于 2017-5-16 16:41

我也遇到同样问题，不知如何解决。

[Kinetis] 请教大家KE02写Flash问题

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