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RE:跪求STM32F207 FSMC接口的nandflash例子
回复:跪求STM32F207 FSMC接口的nandflash例子
RE:跪求STM32F207 FSMC接口的nandflash例子【悬赏问答】
这个看看有没有帮助。
回复:跪求STM32F207 FSMC接口的nandflash例子【悬赏问答】
/**
******************************************************************************
* @file stm3210e_eval_fsmc_nand.c
* @author MCD Application Team
* @version V4.2.0
* @date 04/16/2010
* @brief This file provides a set of functions needed to drive the
* NAND512W3A2 memory mounted on STM3210E-EVAL board.
******************************************************************************
* @copy
*
* 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.
*
* © COPYRIGHT 2010 STMicroelectronics
*/
/* Includes ------------------------------------------------------------------*/
#include "fsmc_nand.h"
/** @addtogroup Utilities
* @{
*/
/** @addtogroup STM32_EVAL
* @{
*/
/** @addtogroup STM3210E_EVAL
* @{
*/
/** @addtogroup STM3210E_EVAL_FSMC_NAND
* @brief This file provides a set of functions needed to drive the
* NAND512W3A2 memory mounted on STM3210E-EVAL board.
* @{
*/
/** @defgroup STM3210E_EVAL_FSMC_NAND_Private_Types
* @{
*/
/**
* @}
*/
/** @defgroup STM3210E_EVAL_FSMC_NAND_Private_Defines
* @{
*/
/**
* @brief FSMC Bank 2
*/
#define FSMC_Bank_NAND FSMC_Bank3_NAND
#define Bank_NAND_ADDR Bank3_NAND_ADDR
#define Bank3_NAND_ADDR ((uint32_t)0x80000000)
/**
* @}
*/
/** @defgroup STM3210E_EVAL_FSMC_NAND_Private_Macros
* @{
*/
#define ROW_ADDRESS (Address.Page + (Address.Block + (Address.Zone * NAND_ZONE_SIZE)) * NAND_BLOCK_SIZE)
/**
* @}
*/
/** @defgroup STM3210E_EVAL_FSMC_NAND_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup STM3210E_EVAL_FSMC_NAND_Private_Function_Prototypes
* @{
*/
/**
* @}
*/
/** @defgroup STM3210E_EVAL_FSMC_NAND_Private_Functions
* @{
*/
/**
* @brief Configures the FSMC and GPIOs to interface with the NAND memory.
* This function must be called before any write/read operation on the
* NAND.
* @param None
* @retval None
*/
void NAND_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
FSMC_NAND_PCCARDTimingInitTypeDef p;
FSMC_NANDInitTypeDef FSMC_NANDInitStructure;
/*FSMC总线使用的GPIO组时钟使能*/
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
// RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_GPIOG | RCC_AHB1Periph_GPIOE, ENABLE);//BM板子上与nandflash有关的引脚
RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC, ENABLE);
/* GPIOD configuration */
GPIO_PinAFConfig(GPIOD, GPIO_PinSource0, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource1, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource3, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource4, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource11, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource7, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource8, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource9, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource10, GPIO_AF_FSMC);
GPIO_PinAFConfig(GPIOG, GPIO_PinSource9, GPIO_AF_FSMC);
/*FSMC CLE, ALE, D0->D3, NOE, NWE 初始化,推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_14 | GPIO_Pin_15 |
GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*FSMC数据线FSMC_D[4:7]初始化,推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/*FSMC NCE3初始化,推挽复用输出*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_Init(GPIOG, &GPIO_InitStructure);
/*FSMC NWAIT初始化,输入上拉*/
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
// GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
// GPIO_Init(GPIOD, &GPIO_InitStructure);
/*FSMC INT初始化,输入上拉*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*--------------FSMC 总线 存储器参数配置------------------------------*/
p.FSMC_SetupTime = 0x1; //建立时间
p.FSMC_WaitSetupTime = 0x3; //等待时间
p.FSMC_HoldSetupTime = 0x2; //保持时间
p.FSMC_HiZSetupTime = 0x1; //高阻建立时间
FSMC_NANDInitStructure.FSMC_Bank = FSMC_Bank3_NAND; //使用FSMC BANK3
FSMC_NANDInitStructure.FSMC_Waitfeature = FSMC_Waitfeature_Enable; //使能FSMC的等待功能
FSMC_NANDInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_8b; //NAND Flash的数据宽度为8位
FSMC_NANDInitStructure.FSMC_ECC = FSMC_ECC_Enable; //使能ECC特性
FSMC_NANDInitStructure.FSMC_ECCPageSize = FSMC_ECCPageSize_2048Bytes; //ECC页大小2048
FSMC_NANDInitStructure.FSMC_TCLRSetupTime = 0x00;
FSMC_NANDInitStructure.FSMC_TARSetupTime = 0x00;
FSMC_NANDInitStructure.FSMC_CommonSpaceTimingStruct = &p;
FSMC_NANDInitStructure.FSMC_AttributeSpaceTimingStruct = &p;
FSMC_NANDInit(&FSMC_NANDInitStructure);
/*!使能FSMC BANK3 */
FSMC_NANDCmd(FSMC_Bank3_NAND, ENABLE);
}
/**
* @brief Reads NAND memory's ID.
* @param NAND_ID: pointer to a NAND_IDTypeDef structure which will hold
* the Manufacturer and Device ID.
* @retval None
*/
void NAND_ReadID(NAND_IDTypeDef* NAND_ID)
{
uint32_t data = 0;
/*!< Send Command to the command area */
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = 0x90;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
// *(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x90;
// *(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = 0x00;
/*!< Sequence to read ID from NAND flash */
data = *(__IO uint32_t *)(FSMC_Bank3_NAND | DATA_AREA);
NAND_ID->Maker_ID = ADDR_1st_CYCLE (data);
NAND_ID->Device_ID = ADDR_2nd_CYCLE (data);
NAND_ID->Third_ID = ADDR_3rd_CYCLE (data);
NAND_ID->Fourth_ID = ADDR_4th_CYCLE (data);
}
/**
* @brief This routine is for writing one or several 512 Bytes Page size.
* @param pBuffer: pointer on the Buffer containing data to be written
* @param Address: First page address
* @param NumPageToWrite: Number of page to write
* @retval New status of the NAND operation. This parameter can be:
* - NAND_TIMEOUT_ERROR: when the previous operation generate
* a Timeout error
* - NAND_READY: when memory is ready for the next operation
* And the new status of the increment address operation. It can be:
* - NAND_VALID_ADDRESS: When the new address is valid address
* - NAND_INVALID_ADDRESS: When the new address is invalid address
*/
uint32_t NAND_WriteSmallPage(uint8_t *pBuffer, NAND_ADDRESS Address, uint32_t NumPageToWrite)
{
uint32_t index = 0x00, numpagewritten = 0x00, addressstatus = NAND_VALID_ADDRESS;
uint32_t status = NAND_READY, size = 0x00;
while((NumPageToWrite != 0x00) && (addressstatus == NAND_VALID_ADDRESS) && (status == NAND_READY))
{
/*!< Page write command and address */
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_A;
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_WRITE0;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_1st_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_2nd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_3rd_CYCLE(ROW_ADDRESS);
/*!< Calculate the size */
size = NAND_PAGE_SIZE + (NAND_PAGE_SIZE * numpagewritten);
/*!< Write data */
for(; index < size; index++)
{
*(__IO uint8_t *)(Bank_NAND_ADDR | DATA_AREA) = pBuffer[index];
}
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_WRITE_TRUE1;
/*!< Check status for successful operation */
status = NAND_GetStatus();
if(status == NAND_READY)
{
numpagewritten++;
NumPageToWrite--;
/*!< Calculate Next small page Address */
addressstatus = NAND_AddressIncrement(&Address);
}
}
return (status | addressstatus);
}
/**
* @brief This routine is for sequential read from one or several 512 Bytes Page size.
* @param pBuffer: pointer on the Buffer to fill
* @param Address: First page address
* @param NumPageToRead: Number of page to read
* @retval New status of the NAND operation. This parameter can be:
* - NAND_TIMEOUT_ERROR: when the previous operation generate
* a Timeout error
* - NAND_READY: when memory is ready for the next operation
* And the new status of the increment address operation. It can be:
* - NAND_VALID_ADDRESS: When the new address is valid address
* - NAND_INVALID_ADDRESS: When the new address is invalid address
*/
uint32_t NAND_ReadSmallPage(uint8_t *pBuffer, NAND_ADDRESS Address, uint32_t NumPageToRead)
{
uint32_t index = 0x00, numpageread = 0x00, addressstatus = NAND_VALID_ADDRESS;
uint32_t status = NAND_READY, size = 0x00;
while((NumPageToRead != 0x0) && (addressstatus == NAND_VALID_ADDRESS))
{
/*!< Page Read command and page address */
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_A;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_1st_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_2nd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_3rd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_TRUE1;
/*!< Calculate the size */
size = NAND_PAGE_SIZE + (NAND_PAGE_SIZE * numpageread);
/*!< Get Data into Buffer */
for(; index < size; index++)
{
pBuffer[index]= *(__IO uint8_t *)(Bank_NAND_ADDR | DATA_AREA);
}
numpageread++;
NumPageToRead--;
/*!< Calculate page address */
addressstatus = NAND_AddressIncrement(&Address);
}
status = NAND_GetStatus();
return (status | addressstatus);
}
/**
* @brief This routine write the spare area information for the specified
* pages addresses.
* @param pBuffer: pointer on the Buffer containing data to be written
* @param Address: First page address
* @param NumSpareAreaTowrite: Number of Spare Area to write
* @retval New status of the NAND operation. This parameter can be:
* - NAND_TIMEOUT_ERROR: when the previous operation generate
* a Timeout error
* - NAND_READY: when memory is ready for the next operation
* And the new status of the increment address operation. It can be:
* - NAND_VALID_ADDRESS: When the new address is valid address
* - NAND_INVALID_ADDRESS: When the new address is invalid address
*/
uint32_t NAND_WriteSpareArea(uint8_t *pBuffer, NAND_ADDRESS Address, uint32_t NumSpareAreaTowrite)
{
uint32_t index = 0x00, numsparesreawritten = 0x00, addressstatus = NAND_VALID_ADDRESS;
uint32_t status = NAND_READY, size = 0x00;
while((NumSpareAreaTowrite != 0x00) && (addressstatus == NAND_VALID_ADDRESS) && (status == NAND_READY))
{
/*!< Page write Spare area command and address */
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_C;
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_WRITE0;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_1st_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_2nd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_3rd_CYCLE(ROW_ADDRESS);
/*!< Calculate the size */
size = NAND_SPARE_AREA_SIZE + (NAND_SPARE_AREA_SIZE * numsparesreawritten);
/*!< Write the data */
for(; index < size; index++)
{
*(__IO uint8_t *)(Bank_NAND_ADDR | DATA_AREA) = pBuffer[index];
}
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_WRITE_TRUE1;
/*!< Check status for successful operation */
status = NAND_GetStatus();
if(status == NAND_READY)
{
numsparesreawritten++;
NumSpareAreaTowrite--;
/*!< Calculate Next page Address */
addressstatus = NAND_AddressIncrement(&Address);
}
}
return (status | addressstatus);
}
/**
* @brief This routine read the spare area information from the specified
* pages addresses.
* @param pBuffer: pointer on the Buffer to fill
* @param Address: First page address
* @param NumSpareAreaToRead: Number of Spare Area to read
* @retval New status of the NAND operation. This parameter can be:
* - NAND_TIMEOUT_ERROR: when the previous operation generate
* a Timeout error
* - NAND_READY: when memory is ready for the next operation
* And the new status of the increment address operation. It can be:
* - NAND_VALID_ADDRESS: When the new address is valid address
* - NAND_INVALID_ADDRESS: When the new address is invalid address
*/
uint32_t NAND_ReadSpareArea(uint8_t *pBuffer, NAND_ADDRESS Address, uint32_t NumSpareAreaToRead)
{
uint32_t numsparearearead = 0x00, index = 0x00, addressstatus = NAND_VALID_ADDRESS;
uint32_t status = NAND_READY, size = 0x00;
while((NumSpareAreaToRead != 0x0) && (addressstatus == NAND_VALID_ADDRESS))
{
/*!< Page Read command and page address */
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_C;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = 0x00;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_1st_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_2nd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_3rd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_AREA_TRUE1;
/*!< Data Read */
size = NAND_SPARE_AREA_SIZE + (NAND_SPARE_AREA_SIZE * numsparearearead);
/*!< Get Data into Buffer */
for ( ;index < size; index++)
{
pBuffer[index] = *(__IO uint8_t *)(Bank_NAND_ADDR | DATA_AREA);
}
numsparearearead++;
NumSpareAreaToRead--;
/*!< Calculate page address */
addressstatus = NAND_AddressIncrement(&Address);
}
status = NAND_GetStatus();
return (status | addressstatus);
}
/**
* @brief This routine erase complete block from NAND FLASH
* @param Address: Any address into block to be erased
* @retval New status of the NAND operation. This parameter can be:
* - NAND_TIMEOUT_ERROR: when the previous operation generate
* a Timeout error
* - NAND_READY: when memory is ready for the next operation
*/
uint32_t NAND_EraseBlock(NAND_ADDRESS Address)
{
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_ERASE0;
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_1st_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_2nd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | ADDR_AREA) = ADDR_3rd_CYCLE(ROW_ADDRESS);
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_ERASE1;
return (NAND_GetStatus());
}
/**
* @brief This routine reset the NAND FLASH.
* @param None
* @retval NAND_READY
*/
uint32_t NAND_Reset(void)
{
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_RESET;
return (NAND_READY);
}
/**
* @brief Get the NAND operation status.
* @param None
* @retval New status of the NAND operation. This parameter can be:
* - NAND_TIMEOUT_ERROR: when the previous operation generate
* a Timeout error
* - NAND_READY: when memory is ready for the next operation
*/
uint32_t NAND_GetStatus(void)
{
uint32_t timeout = 0x1000000, status = NAND_READY;
status = NAND_ReadStatus();
/*!< Wait for a NAND operation to complete or a TIMEOUT to occur */
while ((status != NAND_READY) &&( timeout != 0x00))
{
status = NAND_ReadStatus();
timeout --;
}
if(timeout == 0x00)
{
status = NAND_TIMEOUT_ERROR;
}
/*!< Return the operation status */
return (status);
}
/**
* @brief Reads the NAND memory status using the Read status command.
* @param None
* @retval The status of the NAND memory. This parameter can be:
* - NAND_BUSY: when memory is busy
* - NAND_READY: when memory is ready for the next operation
* - NAND_ERROR: when the previous operation gererates error
*/
uint32_t NAND_ReadStatus(void)
{
uint32_t data = 0x00, status = NAND_BUSY;
/*!< Read status operation ------------------------------------ */
*(__IO uint8_t *)(Bank_NAND_ADDR | CMD_AREA) = NAND_CMD_STATUS;
data = *(__IO uint8_t *)(Bank_NAND_ADDR);
if((data & NAND_ERROR) == NAND_ERROR)
{
status = NAND_ERROR;
}
else if((data & NAND_READY) == NAND_READY)
{
status = NAND_READY;
}
else
{
status = NAND_BUSY;
}
return (status);
}
/**
* @brief Increment the NAND memory address.
* @param Address: address to be incremented.
* @retval The new status of the increment address operation. It can be:
* - NAND_VALID_ADDRESS: When the new address is valid address
* - NAND_INVALID_ADDRESS: When the new address is invalid address
*/
uint32_t NAND_AddressIncrement(NAND_ADDRESS* Address)
{
uint32_t status = NAND_VALID_ADDRESS;
Address->age++;
if(Address->age == NAND_BLOCK_SIZE)
{
Address->age = 0;
Address->Block++;
if(Address->Block == NAND_ZONE_SIZE)
{
Address->Block = 0;
Address->Zone++;
if(Address->Zone == NAND_MAX_ZONE)
{
status = NAND_INVALID_ADDRESS;
}
}
}
return (status);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/
RE:跪求STM32F207 FSMC接口的nandflash例子【悬赏问答】
现在已经实现了通过FSMC对FLASH进行简单的读写
stm32f207 fsmc+nandflash.rar
2012-9-1 10:35 上传
点击文件名下载附件
1.28 MB, 下载次数: 2888
RE:跪求STM32F207 FSMC接口的nandflash例子【悬赏问答】
回复:跪求STM32F207 FSMC接口的nandflash例子【悬赏问答】
最近调试STM32F407通过FSMC外设访问三星NAND FLASH,系统时钟是168MHz,初始化外设GPI0D的PD0、PD1、PD3、PD4、PD6、PD11、PD12、PD14、PD15,还有PE的PE7、PE8、PE9、PE10等时钟及GPIO复用,设置FSMC对应的bank2,访问NAND FLASH ID 时,函数如下:
void FSMC_NAND_ReadID(NAND_IDTypeDef* NAND_ID)
{
/* Send Command to the command area */
*(vu8 *)(NAND_FLASH_START_ADDR | CMD_AREA) = NAND_CMD_READID;
/* Send Address to the address area */
*(vu8 *)(NAND_FLASH_START_ADDR | ADDR_AREA) = 0x00;
/* Sequence to read ID from NAND flash */
NAND_ID->Maker_ID = *(vu8 *)(NAND_FLASH_START_ADDR | DATA_AREA);
NAND_ID->Device_ID = *(vu8 *)(NAND_FLASH_START_ADDR | DATA_AREA);
NAND_ID->Third_ID = *(vu8 *)(NAND_FLASH_START_ADDR | DATA_AREA);
NAND_ID->Fourth_ID = *(vu8 *)(NAND_FLASH_START_ADDR | DATA_AREA);
NAND_ID->Fifth_ID = *(vu8 *)(NAND_FLASH_START_ADDR | DATA_AREA);
}
程序能够正常单步执行 *(vu8 *)(NAND_FLASH_START_ADDR | CMD_AREA) = NAND_CMD_READID;
单步执行*(vu8 *)(NAND_FLASH_START_ADDR | ADDR_AREA) = 0x00时,程序就有问题,不能正常执行,像是跑别的地方去了,停止仿真时,程序指向复位中断(NAND FLASH bank2 地址设置也是正确的)。
上述问题,不仅仅是访问NAND FLASH ID出现,执行擦除函数时也是这样,执行第一句函数正常,但是执行第二句就有问题,不知何故。
上述问题的NAND FLASH.c,NAND FLASH.h是在stm32f103例程基础上移植过来的,由于STM32F407例程没有提供FSMC总线的NAND FLASH例程。
请高手指教,如果你有相关例程,请帮助提供下,谢谢。