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,%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 = AM29LV128ML\r\n");
}
else if ( ( NOR_ID.Manufacturer_Code == 0x0001 ) && ( NOR_ID.Device_Code1 == 0x227E ) &&
( NOR_ID.Device_Code2 == 0x2221 ) && ( NOR_ID.Device_Code3 == 0x2201 ) )
{
printf("Type = S29GL128P\r\n");
}
else if ( ( NOR_ID.Manufacturer_Code == 0x0020 ) && ( NOR_ID.Device_Code1 == 0x227E ) &&
( NOR_ID.Device_Code2 == 0x2220 ) && ( NOR_ID.Device_Code3 == 0x2200 ) )
{
printf("Type = M29DW128F\r\n");
}
else
{
printf("Type = Unknow\r\n");
}
/* 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, WRITE_READ_ADDR, BUFFER_SIZE);
// for (index = 0; index < BUFFER_SIZE; index++ )
// {
// printf("TxBuffer[%d]=%d\r\n",index,TxBuffer[index]);
// printf("RxBuffer[%d]=%d\r\n",index,RxBuffer[index]);
// }
//
if( memcmp( (char*)TxBuffer, (char*)RxBuffer, BUFFER_SIZE ) == 0 )
{
printf("Nor Flash is OK \r\n");
}
else
{
printf("Nor Flash is error \r\n");
}
}
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), 0x00AA);
NOR_WRITE(ADDR_SHIFT(0x02AA), 0x0055);
NOR_WRITE(ADDR_SHIFT(0x0555), 0x0080);
NOR_WRITE(ADDR_SHIFT(0x0555), 0x00AA);
NOR_WRITE(ADDR_SHIFT(0x02AA), 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), 0x00AA);
NOR_WRITE(ADDR_SHIFT(0x02AA), 0x0055);
NOR_WRITE(ADDR_SHIFT(0x0555), 0x0080);
NOR_WRITE(ADDR_SHIFT(0x0555), 0x00AA);
NOR_WRITE(ADDR_SHIFT(0x02AA), 0x0055);
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), 0x00AA);
NOR_WRITE(ADDR_SHIFT(0x02AA), 0x0055);
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 WriteAddr, 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), 0x00AA);
NOR_WRITE(ADDR_SHIFT(0x02AA), 0x0055);
NOR_WRITE((NOR_FLASH_START_ADDR + ReadAddr), 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), 0x00AA);
NOR_WRITE(ADDR_SHIFT(0x002AA), 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, WRITE_READ_ADDR, BUFFER_SIZE);
/* Read data from FSMC NOR memory */
FSMC_NOR_ReadBuffer(RxBuffer, WRITE_READ_ADDR, 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, WRITE_READ_ADDR, BUFFER_SIZE);
/* Read data from FSMC NOR memory */
FSMC_NOR_ReadBuffer(RxBuffer, WRITE_READ_ADDR, 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, WRITE_READ_ADDR, BUFFER_SIZE);
/* Read data from FSMC NOR memory */
FSMC_NOR_ReadBuffer(RxBuffer, WRITE_READ_ADDR, 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。
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