STM32 NORFALSH驱动程序-优快云博客

本文链接：https://blog.youkuaiyun.com/QQ402979209/article/details/7348777

本文档详细介绍了如何在STM32上配置FSMC接口以驱动NOR FLASH，包括初始化设置、读写操作、擦除块和整个芯片的擦除方法，以及状态检查等关键步骤。通过示例代码，演示了读写缓冲区、读取ID和错误检查等功能，以确保NOR FLASH的正确操作。

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/* Includes ------------------------------------------------------------------*/
#include "fsmc_nor.h"

/* Private define ------------------------------------------------------------*/
#define NOR_FLASH_START_ADDR ((uint32_t)0x64000000)
#define NOR_FLASH_END_ADDR ((uint32_t)0x64FFFFFF)

/* Delay definition */
#define BlockErase_Timeout         ((uint32_t)0x00A00000)
#define ChipErase_Timeout          ((uint32_t)0x30000000)
#define Program_Timeout            ((uint32_t)0x00001400)

#define ADDR_SHIFT(A) (NOR_FLASH_START_ADDR + (2 * (A)))
#define NOR_WRITE(Address, Data) (*(vu16 *)(Address) = (Data))

#define BUFFER_SIZE 0x400
#define WRITE_READ_ADDR 0x8000

/* Private variables ---------------------------------------------------------*/
static uint16_t TxBuffer[BUFFER_SIZE];
static uint16_t RxBuffer[BUFFER_SIZE];

/*******************************************************************************
* Function Name : FSMC_NOR_Init
* Description    : Configures the FSMC and GPIOs to interface with the NOR memory.
*                  This function must be called before any write/read operation
*                  on the NOR.
* Input          : None
* Output         : None
* Return         : None
* Attention   : None
*******************************************************************************/
void FSMC_NOR_Init(void)
{
FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef p;
GPIO_InitTypeDef GPIO_InitStructure;

/*使能FSMC总线时钟*/
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

/*使能FSMC总线使用的GPIO组时钟*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_GPIOF |
RCC_APB2Periph_GPIOG | RCC_APB2Periph_AFIO , ENABLE);

/*FSMC数据线FSMC_D[0:15]初始化，推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_8 | GPIO_Pin_9 |
GPIO_Pin_10 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);

/*FSMC地址线FSMC_A[0:17]初始化，推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 |
GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_12 | GPIO_Pin_13 |
GPIO_Pin_14 | GPIO_Pin_15;
GPIO_Init(GPIOF, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13;
GPIO_Init(GPIOD, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6;
GPIO_Init(GPIOE, &GPIO_InitStructure);

/*FSMC NOE和NWE初试化，推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_Init(GPIOD, &GPIO_InitStructure);

/*FSMC NE2初试化，推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_Init(GPIOG, &GPIO_InitStructure);

/*--------------FSMC 总线存储器参数配置------------------------------*/
p.FSMC_AddressSetupTime = 0x02;   //地址建立时间
p.FSMC_AddressHoldTime = 0x00;    //地址保持时间
p.FSMC_DataSetupTime = 0x05;      //数据建立时间
p.FSMC_BusTurnAroundDuration = 0; //总线恢复时间x00
p.FSMC_CLKDivision = 0x00;        // 时钟分频因子
p.FSMC_DataLatency = 0x00;        //数据产生时间
p.FSMC_AccessMode = FSMC_AccessMode_B; //FSMC NOR控制器时序

FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM2;//使用了FSMC的BANK1的子板块2
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;//禁止地址数据线复用
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_NOR;//存储器类型为Nor
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;//存储器数据宽度为16位
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;//关闭突发模式访问
//等待信号优先级，只有在使能突发访问模式才有效
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
//关闭Wrapped burst access mode，只有在使能突发访问模式才有效
FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
//等待信号设置，只有在使能突发访问模式才有效
FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
//使能这个BANK的写操作
FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
//使能/关闭等待信息设置，只在使能突发访问模式才有效
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;//关闭Extend Mode
FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait = FSMC_AsynchronousWait_Disable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;//关闭Write Burst Mode
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;//读操作时序参数
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;//写操作时序参数

FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);

/*--------------使能BANK1的子板块2------------------------------*/
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM2, ENABLE);
}

/******************************************************************************
* 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
*                  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);
}

/******************************************************************************
* 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(); /* 读完ID后，必须返回读模式 */

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 + 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);

if( memcmp( (char*)TxBuffer, (char*)RxBuffer, BUFFER_SIZE ) == 0 )
{
printf("Nor Flash is OK \r\n");
}
else
{
printf("Nor Flash is error \r\n");
}
}

/*********************************************************************************************************
END FILE
********************