最近用stm32调试S29GL128P norflash，遇到一些细节，和大家分享，希望大家少走弯路。 因为这个项目是半路接手的，已经有产品了，我的任务是在此基础上升级改造bug.以前的程序不是特别好 重新整理。 由于S29GL128P使用成品模块，卖家发送的驱动过程。一开始没有深究，直接调用测试读写，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 = X,X,X,X ", 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"); } } 假如大家都用过norflash 必须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，是卖家作为过程发送的。 现在网上有两个版本的驱动程序 一个是火牛 一个是armfly出的驱动。 现在网上有两个版本的驱动程序 一个是火牛 一个是armfly驱动。重底层开始写作可能不会有这个问题。 所以坑爹之路就这样开始了。 开始查看数据手册，以下是存储结构： 以下信息可从此表中知道： 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字节数/或64字 这里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 因此，每个地址可以保存16个地址bit 5.起始地址是 0x000000 结束地址是0x7fffff 6、S29GL128P写作前擦掉，擦除最小单位的扇区 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 NO_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。