一、基本概念（详细内容见st网站stm32应用笔记AN2784）
1. FSMC配置
控制一个NOR闪存存储器，需要FSMC提供下述功能：
●选择合适的存储块映射NOR闪存存储器：共有4个独立的存储块可以用于与NOR闪存、SRAM和PSRAM存储器接口，每个存储块都有一个专用的片选管脚。
●使用或禁止地址/数据总线的复用功能。
●选择所用的存储器类型：NOR闪存、SRAM或PSRAM。
●定义外部存储器的数据总线宽度：8或16位。
●使用或关闭同步NOR闪存存储器的突发访问模式。
●配置等待信号的使用：开启或关闭，极性设置，时序配置。
●使用或关闭扩展模式：扩展模式用于访问那些具有不同读写操作时序的存储器。
因为NOR闪存/SRAM控制器可以支持异步和同步存储器，用户只须根据存储器的参数配置使用到的参数。
FSMC提供了一些可编程的参数，可以正确地与外部存储器接口。依存储器类型的不同，有些参数是不需要的。
当使用一个外部异步存储器时，用户必须按照存储器的数据手册给出的时序数据，计算和设置下列参数：
●ADDSET：地址建立时间
●ADDHOLD：地址保持时间
●DATAST：数据建立时间
●ACCMOD：访问模式 这个参数允许 FSMC可以灵活地访问多种异步的静态存储器。共有4种扩展模式允许以不同的时序分别读写存储器。 在扩展模式下，FSMC_BTR用于配置读操作，FSMC_BWR用于配置写操作。(译注：如果读时序与写时序相同，只须使用FSMC_BTR即可。)
如果使用了同步的存储器，用户必须计算和设置下述参数：
●CLKDIV：时钟分频系数
●DATLAT：数据延时
如果存储器支持的话，NOR闪存的读操作可以是同步的，而写操作仍然是异步的。
当对一个同步的NOR闪存编程时，存储器会自动地在同步与异步之间切换；因此，必须正确地设置所有的参数。
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2. 时序计算
如上所述，对于异步NOR闪存存储器或类似的存储，有不同的访问协议。首先要确定对特定存储器所需要使用的操作协议，选择的依据是不同的控制信号和存储器在读或写操作中的动作。
对于异步NOR闪存存储器，需要使用模式2协议。如果要使用的存储器有NADV信号，则需要使用扩展的模式B协议。
我们将使用模式2操作M29W128FL，不使用任何扩展模式，即读和写操作的时序是一样的。这时NOR闪存控制器需要3个时序参数：ADDSET、DATAST和ADDHOLD。
需要根据NOR闪存存储器的特性和STM32F10xxx的时钟HCLK来这些计算参数。
基于图3和图4的NOR闪存存储器访问时序，可以得到下述公式：
写或读访问时序是存储器片选信号的下降沿与上升沿之间的时间，这个时间可以由FSMC时序参数的函数计算得到：
写/读访问时间 = ((ADDSET + 1) + (DATAST + 1)) × HCLK
在写操作中，DATAST用于衡量写信号的下降沿与上升沿之间的时间参数：
写使能信号从低变高的时间 = tWP = DATAST × HCLK
为了得到正确的FSMC时序配置，下列时序应予以考虑：
●最大的读/写访问时间
●不同的FSMC内部延迟
●不同的存储器内部延迟
因此得到：
((ADDSET + 1) + (DATAST + 1)) × HCLK = max (tWC,tRC)
DATAST × HCLK = tWP
DATAST必须满足：
DATAST = (tAVQV + tsu(Data_NE) + tv(A_NE))/HCLK – ADDSET – 4
二、程序分析
?/*-- FSMC Configuration ----------------------------------------------------*/
? p.FSMC_AddressSetupTime = 0x05;???? /*ADDSET? 地址建立时间*/
? p.FSMC_AddressHoldTime = 0x00;??? /*ADDHOLD 地址保持时间*/
? p.FSMC_DataSetupTime = 0x07;???? /*DATAST 数据建立时间*/
? p.FSMC_BusTurnAroundDuration = 0x00;?? /*BUSTURN 总线返转时间*/
? p.FSMC_CLKDivision = 0x00;????? /*CLKDIV 时钟分频*/
? p.FSMC_DataLatency = 0x00;???? /*DATLAT 数据保持时间*/
? p.FSMC_AccessMode = FSMC_AccessMode_B;?? /*访问模式*/
?
/*NOR/SRAM的存储块，共4个选项*/
? FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM2;????
/*是否选择地址和数据复用数据线*/
??FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;??
/*连接到相应存储块的外部存储器类型*/
? FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_NOR;???
/*存储器数据总线宽度*/
? FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;??
/*使能或关闭同步NOR闪存存储器的突发访问模式设置是否使用迸发访问模式(应该就是连续读写模式吧)*/
? FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;???
/*设置WAIT信号的有效电平*/
? FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;???
?/*设置是否使用环回模式*/
? FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;????
/*设置WAIT信号有效时机*/
??FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;?
/*设定是否使能写操作*/
? FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;??
/*设定是否使用WAIT信号*/
? FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;???
/*使能或关闭扩展模式，扩展模式用于访问具有不同读写操作时序的存储器，设定是否使用单独的写时序*/?????
? FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;??
/*设定是否使用异步等待信号*/
? FSMC_NORSRAMInitStructure.FSMC_AsyncWait = FSMC_AsyncWait_Disable;??
/*设定是否使用迸发写模式*/??
? FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;??
?/*设定读写时序*/
??FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;??? //?????
? FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;????//
????????????????
? FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);??????? //
? /* Enable FSMC Bank1_NOR Bank */
? FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM2,ENABLE);??????? //
}
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三、例程：STM32读写外NOR FLASH 存储器 39VF1601
1. fsmc_nor..c
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name????????? : fsmc_nor.c
* Author???????????? : MCD Application Team
* Version??????????? : V2.0.1
* Date?????????????? : 06/13/2008
* Description??????? : This file provides a set of functions needed to drive the
*????????????????????? M29W128FL,M29W128GL and S29GL128P NOR memories mounted
*????????????????????? on STM3210E-EVAL board.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT,STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "fsmc_nor.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define Bank1_NOR2_ADDR?????? ((u32)0x64000000)
/* Delay definition */??
#define BlockErase_Timeout??? ((u32)0x00A00000)
#define ChipErase_Timeout???? ((u32)0x30000000)
#define Program_Timeout?????? ((u32)0x00001400)
/* Private macro -------------------------------------------------------------*/
#define ADDR_SHIFT(A) (Bank1_NOR2_ADDR + (2 * (A)))
#define NOR_WRITE(Address,Data)? (*(vu16 *)(Address) = (Data))
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* 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
*******************************************************************************/
void FSMC_NOR_Init(void)
{
? FSMC_NORSRAMInitTypeDef? FSMC_NORSRAMInitStructure;
? FSMC_NORSRAMTimingInitTypeDef? p;
? GPIO_InitTypeDef GPIO_InitStructure;
? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
???????????????????????? RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG,ENABLE);
? /*-- GPIO Configuration ------------------------------------------------------*/
? /* NOR Data lines configuration */
? 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);
? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
??????????????????????????????? GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 |
??????????????????????????????? GPIO_Pin_14 | GPIO_Pin_15;
? GPIO_Init(GPIOE,&GPIO_InitStructure);
? /* NOR Address lines configuration */
? 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_0 | GPIO_Pin_1 | GPIO_Pin_2 |
??????????????????????????????? GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;???????????????????????????
? GPIO_Init(GPIOG,&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);
? /* NOE and NWE configuration */
? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
? GPIO_Init(GPIOD,&GPIO_InitStructure);
? /* NE2 configuration */
? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
? GPIO_Init(GPIOG,&GPIO_InitStructure);
? /*-- FSMC Configuration ----------------------------------------------------*/
? p.FSMC_AddressSetupTime = 0x05;???? /*ADDSET? 地址建立时间*/
? p.FSMC_AddressHoldTime = 0x00;??? /*ADDHOLD 地址保持时间*/
? p.FSMC_DataSetupTime = 0x07;???? /*DATAST 数据建立时间*/
? p.FSMC_BusTurnAroundDuration = 0x00;?? /*BUSTURN 总线返转时间*/
? p.FSMC_CLKDivision = 0x00;????? /*CLKDIV 时钟分频*/
? p.FSMC_DataLatency = 0x00;???? /*DATLAT 数据保持时间*/
? p.FSMC_AccessMode = FSMC_AccessMode_B;?? /*访问模式*/
? FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM2;??? // NOR/SRAM的存储块，共4个选项
? FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;? //? 是都选择地址和数据复用数据线
? FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_NOR;???// 连接到相应存储块的外部存储器类型
? FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;? //存储器数据总线宽度
? FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;?? // 使能或关闭同步NOR闪存存储器的突发访问模式
?????????????????????? //设置是否使用迸发访问模式(应该就是连续读写模式吧)
? FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;?? //?? 设置WAIT信号的有效电平
? FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;????// 设置是否使用环回模式
? FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState; // 设置WAIT信号有效时机
? FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;? //?? 设定是否使能写操作
? FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;?? //??? 设定是否使用WAIT信号
? FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;??//?使能或关闭扩展模式，扩展模式用于访问具有不同读写操作时序的存储器
????????????????????//?设定是否使用单独的写时序
? FSMC_NORSRAMInitStructure.FSMC_AsyncWait = FSMC_AsyncWait_Disable;??//? 设定是否使用异步等待信号
? FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;??//? 设定是否使用迸发写模式
? FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;??? //? 设定读写时序
? FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;????//
????????????????
? FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);??????? //
? /* Enable FSMC Bank1_NOR Bank */
? 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
*******************************************************************************/
void FSMC_NOR_ReadID(NOR_IDTypeDef* NOR_ID)
{
? NOR_WRITE(ADDR_SHIFT(0x05555),0x00AA);
? NOR_WRITE(ADDR_SHIFT(0x02AAA),0x0055);
? NOR_WRITE(ADDR_SHIFT(0x05555),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
*******************************************************************************/
NOR_Status FSMC_NOR_EraseBlock(u32 BlockAddr)
{
? NOR_WRITE(ADDR_SHIFT(0x05555),0x0080);
? NOR_WRITE(ADDR_SHIFT(0x05555),0x0055);
? NOR_WRITE((Bank1_NOR2_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
*******************************************************************************/
NOR_Status FSMC_NOR_EraseChip(void)
{
? NOR_WRITE(ADDR_SHIFT(0x05555),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
*******************************************************************************/
NOR_Status FSMC_NOR_WriteHalfWord(u32 WriteAddr,u16 Data)
{
? NOR_WRITE(ADDR_SHIFT(0x05555),0x00A0);
? NOR_WRITE((Bank1_NOR2_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
*******************************************************************************/
NOR_Status FSMC_NOR_WriteBuffer(u16* pBuffer,u32 WriteAddr,u32 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
*******************************************************************************/
NOR_Status FSMC_NOR_ProgramBuffer(u16* pBuffer,u32 NumHalfwordToWrite)
{??????
? u32 lastloadedaddress = 0x00;
? u32 currentaddress = 0x00;
? u32 endaddress = 0x00;
? /* Initialize variables */
? currentaddress = WriteAddr;
? endaddress = WriteAddr + NumHalfwordToWrite - 1;
? lastloadedaddress = WriteAddr;
? /* Issue unlock command sequence */
? NOR_WRITE(ADDR_SHIFT(0x005555),0x00AA);
? NOR_WRITE(ADDR_SHIFT(0x02AAA),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
*******************************************************************************/
u16 FSMC_NOR_ReadHalfWord(u32 ReadAddr)
{
? NOR_WRITE(ADDR_SHIFT(0x005555),0x00AA);
? NOR_WRITE(ADDR_SHIFT(0x002AAA),0x0055);?
? NOR_WRITE((Bank1_NOR2_ADDR + ReadAddr),0x00F0 );
? return (*(vu16 *)((Bank1_NOR2_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
*******************************************************************************/
void FSMC_NOR_ReadBuffer(u16* pBuffer,u32 ReadAddr,u32 NumHalfwordToRead)
{
? NOR_WRITE(ADDR_SHIFT(0x05555),0x0055);
? NOR_WRITE((Bank1_NOR2_ADDR + ReadAddr),0x00F0);
? for(; NumHalfwordToRead != 0x00; NumHalfwordToRead--) /* while there is data to read */
? {
??? /* Read a Halfword from the NOR */
??? *pBuffer++ = *(vu16 *)((Bank1_NOR2_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
*******************************************************************************/
NOR_Status FSMC_NOR_ReturnToReadMode(void)
{
? NOR_WRITE(Bank1_NOR2_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
*******************************************************************************/
NOR_Status FSMC_NOR_Reset(void)
{
? NOR_WRITE(ADDR_SHIFT(0x005555),0x0055);
? NOR_WRITE(Bank1_NOR2_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
*******************************************************************************/
NOR_Status FSMC_NOR_GetStatus(u32 Timeout)
{
? u16 val1 = 0x00,val2 = 0x00;
? NOR_Status status = NOR_ONGOING;
? u32 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 *)(Bank1_NOR2_ADDR);
??? val2 = *(vu16 *)(Bank1_NOR2_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 *)(Bank1_NOR2_ADDR);
??? val2 = *(vu16 *)(Bank1_NOR2_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);
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
?
?
?
?
2.main.c
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name????????? : main.c
* Author???????????? : MCD Application Team
* Version??????????? : V2.0.1
* Date?????????????? : 06/13/2008
* Description??????? : Main program body
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "fsmc_nor.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define BUFFER_SIZE??????? 0x400
#define WRITE_READ_ADDR??? 0x8000
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
GPIO_InitTypeDef GPIO_InitStructure;
ErrorStatus HSEStartUpStatus;
u16 TxBuffer[BUFFER_SIZE];
u16 RxBuffer[BUFFER_SIZE];
u32 WriteReadStatus = 0,Index = 0;
NOR_IDTypeDef NOR_ID;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);
void Fill_Buffer(u16 *pBuffer,u16 BufferLenght,u32 Offset);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name? : main
* Description??? : Main program.
* Input????????? : None
* Output???????? : None
* Return???????? : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
? debug();
#endif
? /* System Clocks Configuration */
? RCC_Configuration();??
? /* NVIC Configuration */
? NVIC_Configuration();
? /* PF.06 and PF.07? config to drive LD1 and LD2 *****************************/
? /* Enable GPIOF clock */
? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOF,ENABLE);
?
? /* Configure PF.06 and PF.07 as Output push-pull */
? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
? GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
? GPIO_Init(GPIOF,&GPIO_InitStructure);
?
? /* Write/read to/from FSMC SRAM memory? *************************************/
? /* Enable the FSMC Clock */
? RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC,ENABLE);
? /* Configure FSMC Bank1 NOR/SRAM2 */
? FSMC_NOR_Init();
?
? /* Read NOR memory ID */
? FSMC_NOR_ReadID(&NOR_ID);
? FSMC_NOR_ReturnToReadMode();
? /* 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 */
? Fill_Buffer(TxBuffer,BUFFER_SIZE,0x3210);
? FSMC_NOR_WriteBuffer(TxBuffer,WRITE_READ_ADDR,BUFFER_SIZE);
? /* Read data from FSMC NOR memory */
? FSMC_NOR_ReadBuffer(RxBuffer,BUFFER_SIZE);?
? /* Read back NOR memory and check content correctness */??
? for (Index = 0x00; (Index < BUFFER_SIZE) && (WriteReadStatus == 0); Index++)
? {
??? if (RxBuffer[Index] != TxBuffer[Index])
??? {
????? WriteReadStatus = Index + 1;
??? }
? }?
? if (WriteReadStatus == 0)
? {?/* OK */
??? /* Turn on LD1 */
??? GPIO_SetBits(GPIOF,GPIO_Pin_6);
? }
? else
? { /* KO */
??? /* Turn on LD2 */
??? GPIO_SetBits(GPIOF,GPIO_Pin_7);????
? }
? while (1)
? {
? }
}
/*******************************************************************************
* Function Name? : RCC_Configuration
* Description??? : Configures the different system clocks.
* Input????????? : None
* Output???????? : None
* Return???????? : None
*******************************************************************************/
void RCC_Configuration(void)
{??
? /* RCC system reset(for debug purpose) */
? RCC_DeInit();
? /* Enable HSE */
? RCC_HSEConfig(RCC_HSE_ON);
? /* Wait till HSE is ready */
? HSEStartUpStatus = RCC_WaitForHSEStartUp();
? if(HSEStartUpStatus == SUCCESS)
? {
??? /* Enable Prefetch Buffer */
??? FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
??? /* Flash 2 wait state */
??? FLASH_SetLatency(FLASH_Latency_2);
??
??? /* HCLK = SYSCLK */
??? RCC_HCLKConfig(RCC_SYSCLK_Div1);
?
??? /* PCLK2 = HCLK */
??? RCC_PCLK2Config(RCC_HCLK_Div1);
??? /* PCLK1 = HCLK/2 */
??? RCC_PCLK1Config(RCC_HCLK_Div2);
??? /* PLLCLK = 8MHz * 9 = 72 MHz */
??? RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);
??? /* Enable PLL */
??? RCC_PLLCmd(ENABLE);
??? /* Wait till PLL is ready */
??? while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
??? {
??? }
??? /* Select PLL as system clock source */
??? RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
??? /* Wait till PLL is used as system clock source */
??? while(RCC_GetSYSCLKSource() != 0x08)
??? {
??? }
? }
}
/*******************************************************************************
* Function Name? : NVIC_Configuration
* Description??? : Configures Vector Table base location.
* Input????????? : None
* Output???????? : None
* Return???????? : None
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef? VECT_TAB_RAM?
? /* Set the Vector Table base location at 0x20000000 */
? NVIC_SetVectorTable(NVIC_VectTab_RAM,0x0);
#else? /* VECT_TAB_FLASH? */
? /* Set the Vector Table base location at 0x08000000 */
? NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0);??
#endif
}
/*******************************************************************************
* Function name : Fill_Buffer
* Description?? : Fill the global buffer
* Input???????? : - pBuffer: pointer on the Buffer to fill
*???????????????? - BufferSize: size of the buffer to fill
*???????????????? - Offset: first value to fill on the Buffer
* Output param? : None
*******************************************************************************/
void Fill_Buffer(u16 *pBuffer,u32 Offset)
{
? u16 IndexTmp = 0;
? /* Put in global buffer same values */
? for (IndexTmp = 0; IndexTmp < BufferLenght; IndexTmp++ )
? {
??? pBuffer[IndexTmp] = IndexTmp + Offset;
? }
}
#ifdef? DEBUG
/*******************************************************************************
* Function Name? : assert_failed
* Description??? : Reports the name of the source file and the source line number
*????????????????? where the assert_param error has occurred.
* Input????????? : - file: pointer to the source file name
*????????????????? - line: assert_param error line source number
* Output???????? : None
* Return???????? : None
*******************************************************************************/
void assert_failed(u8* file,u32 line)
{
? /* User can add his own implementation to report the file name and line number,
???? ex: printf("Wrong parameters value: file %s on line %d/r/n",file,line) */
? /* Infinite loop */
? while (1)
? {
? }
}
#endif
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
