S29GL128P norflash 读写擦除问题

最近用stm32调试S29GL128P norflash，遇到一些细节问题，和大家分享一下，希望大家能少走弯路。

因为这个项目是半路接手，已经有产品了，我的任务就是在此基础上升级改bug.之前的程序写的不是特别好

从新整理一下。

????由于S29GL128P用的是成品模块，卖家送的驱动历程。开始没有深究，直接调用测试一下读写，可以用就没有深究。测试代码如下：

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

* Function Name : FSMC_NOR_Test

* Description : NOR Test

* Input : None

* Output : None

* Return : None

* Attention???????? : None

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

void FSMC_NOR_Test(void)

{

uint16_t index;

NOR_IDTypeDef NOR_ID;

?

/* Initialize the FSMC NOR Flash Interface */

FSMC_NOR_Init();

/* Set the NOR read modes */

FSMC_NOR_ReturnToReadMode();

?

FSMC_NOR_ReadID(&NOR_ID);

printf("Nor Flash ID = %04X,%04X,%04X ",NOR_ID.Manufacturer_Code,NOR_ID.Device_Code1,

NOR_ID.Device_Code2,NOR_ID.Device_Code3 );

FSMC_NOR_ReturnToReadMode();

?

if( ( NOR_ID.Manufacturer_Code == 0x0001 ) && (NOR_ID.Device_Code1 == 0x227E) &&

???? ( NOR_ID.Device_Code2 == 0x2212 ) && ( NOR_ID.Device_Code3 == 0x2200 ) )

{

printf("Type = AM29LV128MLrn");

}

else if ( ( NOR_ID.Manufacturer_Code == 0x0001 ) && ( NOR_ID.Device_Code1 == 0x227E ) &&

???????? ( NOR_ID.Device_Code2 == 0x2221 ) && ( NOR_ID.Device_Code3 == 0x2201 ) )

{

???? printf("Type = S29GL128Prn");

}

else if ( ( NOR_ID.Manufacturer_Code == 0x0020 ) && ( NOR_ID.Device_Code1 == 0x227E ) &&

???????? ( NOR_ID.Device_Code2 == 0x2220 ) && ( NOR_ID.Device_Code3 == 0x2200 ) )

{

???? printf("Type = M29DW128Frn");

}

else

{

???? printf("Type = Unknowrn");

}

?

/* Erase the NOR memory block to write on */

FSMC_NOR_EraseBlock(WRITE_READ_ADDR);

?

/* Write data to FSMC NOR memory */

/* Fill the buffer to send */

for (index = 0; index < BUFFER_SIZE; index++ )

{

TxBuffer[index] = index + 0x1234;//index+0x3210

}

?

FSMC_NOR_WriteBuffer(TxBuffer,WRITE_READ_ADDR,BUFFER_SIZE);

?

/* Read data from FSMC NOR memory */

FSMC_NOR_ReadBuffer(RxBuffer,BUFFER_SIZE);

????

// ????for (index = 0; index < BUFFER_SIZE; index++ )

// {

// printf("TxBuffer[%d]=%drn",index,TxBuffer[index]);

// ????????printf("RxBuffer[%d]=%drn",RxBuffer[index]);

// }

// ????

if( memcmp( (char*)TxBuffer,(char*)RxBuffer,BUFFER_SIZE ) == 0 )

{

printf("Nor Flash is OK rn");

}

else

{

printf("Nor Flash is error rn");

}

}

如果大家用过norflash 一定知道这个驱动程序是谁写的，我发现最早的版本是火牛开发板带的，被卖家都走当历程送了。

网上现在有两个版本的驱动程序 一个是火牛的 一个是armfly出的驱动。重底层开始写可能就不会出这个问题了。

所以坑爹之路就这么开始了。

开始查看数据手册，看看存储结构如下：

从这个表上可以知道如下信息：

1、S29GL128P有128Mbit位存储 也就是有 128/8 = 8M byte 的存储大小 （目前使用过的存储器 都是按位计数的）

2、S29GL128P一个扇区有128Kb的字节数/或者64个字 这里面的字和我们通常说的字不一样 这里的 word = 2byte

3、S29GL128P 有128个扇区 扇区0-扇区127

4、扇区0的范围是 0x000000 - 0x00ffff 也就是说有64K个地址 ，对应128K 所以每个地址能保存16bit

5、起始地址是 0x000000 结束地址是0x7fffff

6、S29GL128P写之前要擦除，擦除最小单位是一个扇区 128Kb

?

有了这些知识就可以使用了

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

* Function Name : FSMC_NOR_ReadID

* Description : Reads NOR memory's Manufacturer and Device Code.

* Input : - NOR_ID: pointer to a NOR_IDTypeDef structure which will hold

* the Manufacturer and Device Code.

* Output : None

* Return : None

* Attention???????? : None

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

void FSMC_NOR_ReadID(NOR_IDTypeDef* NOR_ID)

{

NOR_WRITE(ADDR_SHIFT(0x0555),0x00AA);

NOR_WRITE(ADDR_SHIFT(0x02AA),0x0055);

NOR_WRITE(ADDR_SHIFT(0x0555),0x0090);

?

NOR_ID->Manufacturer_Code = *(vu16 *) ADDR_SHIFT(0x0000);

NOR_ID->Device_Code1 = *(vu16 *) ADDR_SHIFT(0x0001);

NOR_ID->Device_Code2 = *(vu16 *) ADDR_SHIFT(0x000E);

NOR_ID->Device_Code3 = *(vu16 *) ADDR_SHIFT(0x000F);

}

?

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

* Function Name : FSMC_NOR_EraseBlock

* Description : Erases the specified Nor memory block.

* Input : - BlockAddr: address of the block to erase.

* Output : None

* Return : NOR_Status:The returned value can be: NOR_SUCCESS,NOR_ERROR

* or NOR_TIMEOUT

* Attention???????? : None

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

NOR_Status FSMC_NOR_EraseBlock(uint32_t BlockAddr)

{

NOR_WRITE(ADDR_SHIFT(0x0555),0x0080);

NOR_WRITE(ADDR_SHIFT(0x0555),0x0055);

NOR_WRITE((NOR_FLASH_START_ADDR + BlockAddr),0x30);

?

return (FSMC_NOR_GetStatus(BlockErase_Timeout));

}

?

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

* Function Name : FSMC_NOR_EraseChip

* Description : Erases the entire chip.

* Input : None

* Output : None

* Return : NOR_Status:The returned value can be: NOR_SUCCESS,NOR_ERROR

* or NOR_TIMEOUT

* Attention???????? : None

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

NOR_Status FSMC_NOR_EraseChip(void)

{

NOR_WRITE(ADDR_SHIFT(0x0555),0x0010);

?

return (FSMC_NOR_GetStatus(ChipErase_Timeout));

}

?

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

* Function Name : FSMC_NOR_WriteHalfWord

* Description : Writes a half-word to the NOR memory.

* Input : - WriteAddr : NOR memory internal address to write to.

* - Data : Data to write.

* Output : None

* Return : NOR_Status:The returned value can be: NOR_SUCCESS,NOR_ERROR

* or NOR_TIMEOUT

* Attention???????? : None

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

NOR_Status FSMC_NOR_WriteHalfWord(uint32_t WriteAddr,uint16_t Data)

{

NOR_WRITE(ADDR_SHIFT(0x0555),0x00A0);

NOR_WRITE((NOR_FLASH_START_ADDR + WriteAddr),Data);

?

return (FSMC_NOR_GetStatus(Program_Timeout));

}

?

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

* Function Name : FSMC_NOR_WriteBuffer

* Description : Writes a half-word buffer to the FSMC NOR memory.

* Input : - pBuffer : pointer to buffer.

* - WriteAddr : NOR memory internal address from which the data

* will be written.

* - NumHalfwordToWrite : number of Half words to write.

* Output : None

* Return : NOR_Status:The returned value can be: NOR_SUCCESS,NOR_ERROR

* or NOR_TIMEOUT

* Attention???????? : None

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

NOR_Status FSMC_NOR_WriteBuffer(uint16_t* pBuffer,uint32_t WriteAddr,uint32_t NumHalfwordToWrite)

{

NOR_Status status = NOR_ONGOING;

?

do

{

/* Transfer data to the memory */

status = FSMC_NOR_WriteHalfWord(WriteAddr,*pBuffer++);

WriteAddr = WriteAddr + 2;

NumHalfwordToWrite--;

}

while((status == NOR_SUCCESS) && (NumHalfwordToWrite != 0));

?

return (status);

}

?

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

* Function Name : FSMC_NOR_ProgramBuffer

* Description : Writes a half-word buffer to the FSMC NOR memory. This function nor a0-a15 stm32 a1-a16

* must be used only with S29GL128P NOR memory.

* Input : - pBuffer : pointer to buffer.

* - WriteAddr: NOR memory internal address from which the data

* will be written.

* - NumHalfwordToWrite: number of Half words to write.

* The maximum allowed value is 32 Half words (64 bytes).

* Output : None

* Return : NOR_Status:The returned value can be: NOR_SUCCESS,NOR_ERROR

* or NOR_TIMEOUT

* Attention???????? : None

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

NOR_Status FSMC_NOR_ProgramBuffer(uint16_t* pBuffer,uint32_t NumHalfwordToWrite)

{

uint32_t lastloadedaddress = 0x00;

uint32_t currentaddress = 0x00;

uint32_t endaddress = 0x00;

?

/* Initialize variables */

currentaddress = WriteAddr;

endaddress = WriteAddr + NumHalfwordToWrite - 1;

lastloadedaddress = WriteAddr;

?

/* Issue unlock command sequence */

NOR_WRITE(ADDR_SHIFT(0x00555),0x00AA);

?

NOR_WRITE(ADDR_SHIFT(0x02AA),0x0055);

?

/* Write Write Buffer Load Command */

NOR_WRITE(ADDR_SHIFT(WriteAddr),0x0025);

NOR_WRITE(ADDR_SHIFT(WriteAddr),(NumHalfwordToWrite - 1));

?

/* Load Data into NOR Buffer */

while(currentaddress <= endaddress)

{

/* Store last loaded address & data value (for polling) */

lastloadedaddress = currentaddress;

?

NOR_WRITE(ADDR_SHIFT(currentaddress),*pBuffer++);

currentaddress += 1;

}

?

NOR_WRITE(ADDR_SHIFT(lastloadedaddress),0x29);

?

return(FSMC_NOR_GetStatus(Program_Timeout));

}

?

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

* Function Name : FSMC_NOR_ReadHalfWord

* Description : Reads a half-word from the NOR memory.

* Input : - ReadAddr : NOR memory internal address to read from.

* Output : None

* Return : Half-word read from the NOR memory

* Attention???????? : None

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

uint16_t FSMC_NOR_ReadHalfWord(uint32_t ReadAddr)

{

NOR_WRITE(ADDR_SHIFT(0x00555),0x00AA);

NOR_WRITE(ADDR_SHIFT(0x002AA),0x0055);

NOR_WRITE((NOR_FLASH_START_ADDR + ReadAddr),0x00F0 );

?

return (*(vu16 *)((NOR_FLASH_START_ADDR + ReadAddr)));

}

?

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

* Function Name : FSMC_NOR_ReadBuffer

* Description : Reads a block of data from the FSMC NOR memory.

* Input : - pBuffer : pointer to the buffer that receives the data read

* from the NOR memory.

* - ReadAddr : NOR memory internal address to read from.

* - NumHalfwordToRead : number of Half word to read.

* Output : None

* Return : None

* Attention???????? : None

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

void FSMC_NOR_ReadBuffer(uint16_t* pBuffer,uint32_t ReadAddr,uint32_t NumHalfwordToRead)

{

NOR_WRITE(ADDR_SHIFT(0x0555),0x00F0);

?

for(; NumHalfwordToRead != 0x00; NumHalfwordToRead--) /* while there is data to read */

{

/* Read a Halfword from the NOR */

*pBuffer++ = *(vu16 *)((NOR_FLASH_START_ADDR + ReadAddr));

ReadAddr = ReadAddr + 2;

}

}

?

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

* Function Name : FSMC_NOR_ReturnToReadMode

* Description : Returns the NOR memory to Read mode.

* Input : None

* Output : None

* Return : NOR_SUCCESS

* Attention???????? : None

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

NOR_Status FSMC_NOR_ReturnToReadMode(void)

{

NOR_WRITE(NOR_FLASH_START_ADDR,0x00F0);

?

return (NOR_SUCCESS);

}

?

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

* Function Name : FSMC_NOR_Reset

* Description : Returns the NOR memory to Read mode and resets the errors in

* the NOR memory Status Register.

* Input : None

* Output : None

* Return : NOR_SUCCESS

* Attention???????? : None

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

NOR_Status FSMC_NOR_Reset(void)

{

NOR_WRITE(ADDR_SHIFT(0x00555),0x0055);

NOR_WRITE(NOR_FLASH_START_ADDR,0x00F0);

?

return (NOR_SUCCESS);

}

?

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

* Function Name : FSMC_NOR_GetStatus

* Description : Returns the NOR operation status.

* Input : - Timeout: NOR progamming Timeout

* Output : None

* Return : NOR_Status:The returned value can be: NOR_SUCCESS,NOR_ERROR

* or NOR_TIMEOUT

* Attention???????? : None

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

NOR_Status FSMC_NOR_GetStatus(uint32_t Timeout)

{

uint16_t val1 = 0x00,val2 = 0x00;

NOR_Status status = NOR_ONGOING;

uint32_t timeout = Timeout;

?

/* Poll on NOR memory Ready/Busy signal ------------------------------------*/

while((GPIO_ReadInputDataBit(GPIOD,GPIO_Pin_6) != RESET) && (timeout > 0))

{

timeout--;

}

?

timeout = Timeout;

?

while((GPIO_ReadInputDataBit(GPIOD,GPIO_Pin_6) == RESET) && (timeout > 0))

{

timeout--;

}

?

/* Get the NOR memory operation status -------------------------------------*/

while((Timeout != 0x00) && (status != NOR_SUCCESS))

{

Timeout--;

?

???? /* Read DQ6 and DQ5 */

val1 = *(vu16 *)(NOR_FLASH_START_ADDR);

val2 = *(vu16 *)(NOR_FLASH_START_ADDR);

?

/* If DQ6 did not toggle between the two reads then return NOR_Success */

if((val1 & 0x0040) == (val2 & 0x0040))

{

return NOR_SUCCESS;

}

?

if((val1 & 0x0020) != 0x0020)

{

status = NOR_ONGOING;

}

?

val1 = *(vu16 *)(NOR_FLASH_START_ADDR);

val2 = *(vu16 *)(NOR_FLASH_START_ADDR);

?

if((val1 & 0x0040) == (val2 & 0x0040))

{

return NOR_SUCCESS;

}

else if((val1 & 0x0020) == 0x0020)

{

return NOR_ERROR;

}

}

?

if(Timeout == 0x00)

{

status = NOR_TIMEOUT;

}

?

/* Return the operation status */

return (status);

}

?

?

调用上述函数就可以对flash进行操作了。

?

按照手册上写的写入之前要擦除

#define WRITE_READ_ADDR 0x000000

/* Erase the NOR memory block to write on */

FSMC_NOR_EraseBlock(WRITE_READ_ADDR);

FSMC_NOR_WriteBuffer(TxBuffer,BUFFER_SIZE);

/* Read data from FSMC NOR memory */

FSMC_NOR_ReadBuffer(RxBuffer,BUFFER_SIZE);

?

结果完全正确

?

?

按照手册上写的写入第二个扇区试试

#define WRITE_READ_ADDR 0x010000

/* Erase the NOR memory block to write on */

FSMC_NOR_EraseBlock(WRITE_READ_ADDR);

FSMC_NOR_WriteBuffer(TxBuffer,BUFFER_SIZE);

?

错误。。。。。。。。。。。。。。。。。。。。。。。。。。。。。

What???

按照手册上写的为啥会错。。。。

纠结了好久 各种找资料 就两个版本程序 没有太大帮助。

出这个错误本应该能发现的 但是由于期间有其他的事情要做耽搁几天，回来按着手册来写，就想不到问题所在了

还好今天灵光一闪 想到问题了所在了

原来是地址没有对齐

由于stm32 FSMC 16位模式时 地址线是错开的

也就是说 在我正常的地址要左移一位在写进去才是真实的地址

#define WRITE_READ_ADDR （0x010000<<1）

/* Erase the NOR memory block to write on */

FSMC_NOR_EraseBlock(WRITE_READ_ADDR);

FSMC_NOR_WriteBuffer(TxBuffer,BUFFER_SIZE);

?

这样就对了。

万恶的历程，能不走点心，不要单纯的测试一个扇区了，要说明啊，卖flash的客服给点力啊！别跟小白一样啊

?

大家做事情一定要做完 在去干别的 要不然真的很坑啊 ，地址移位这个问题 做的时候已经发现了，但是中耽搁了，

在捡起，潜意识里已经认为做完了，就没有在忘上面想，结果浪费了好几天的时间。