【开源活动】-基于国民N32G45x的SD卡IAP升级开发

发表于 2023-4-2 23:12

本帖最后由 6552918 于 2023-4-3 09:35 编辑

#申请原创# #技术资源#@安小芯

测试条件
IDE	硬件	编译器	软件包
MDK 5.38	N32G457XVL-STB V1.1 SD卡读写模块-SPI接口 SD卡、TF卡.MMC卡	ARM Compiler 6(AC6)	SD_SPI FATFS FLASH_IAP

1. 硬件部分说明1.1 硬件说明

使用N32G457XVL-STB V1.1开发板，因为板子上并没有集成SD卡槽，所有需要扩展一个SD卡槽，SD卡支持两种驱动模式，一种是SPI驱动，另一种是SDIO驱动，因为我手上只有SPI接口的SD卡模块，所以本例程使用的是SPI驱动SD卡进行的演示。

SD卡读写模块-SPI接口模块

SD卡读写模块-SPI接口模块原理图

为了做兼容性测试我准备了3种卡有SD卡 TF卡 MMC卡

1.2 FLASH说明

N32G457的FLASH有256个页，每个页大小为2KB，需要根据使用情况对FLASH进行划分。

本例程FLASH划分：

	起始地址	结束地址	大小	页数
Bootloader区	0x8000000	0x80037FF	14KB	7
升级标志去	0x8003800	0x8003FFF	2KB	1
Application区	0x8004000	0x8026000	486KB	248

2. 软件部分说明

首先要准备一个编译无错误并运行正常的工程文件（建议使用厂家例程库里的工程，我这里使用的是uart的printf工程）

2.1 软件包移植

SD_SPI驱动移植

在工程内添加SD_SPI的驱动文件

添加.c文件

添加.h头文件路径

sdspi_port.c文件是移植的接口文件，里面需要根据实际使用情况实现接口函数，包含SPI初始化、SPI时钟速率变更及SPI数据收发函数，我这里使用的是SPI1

相关接口函数如下：

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/*

 * Copyright 2022 MindMotion Microelectronics Co., Ltd.

 * All rights reserved.

 *

 * SPDX-License-Identifier: BSD-3-Clause

 */

#include <stdio.h>

#include <stdint.h>

#include "sdspi.h"

#include "n32g45x_spi.h"



/* pins:

 * tx : PA7/SPI_MOSI

 * rx : PA6/SPI0_MISO

 * clk: PA5/SPI1_SCK

 * cs : PA4/SPI0_PCS0

 */



#define BOARD_SDSPI_TX_GPIO_PORT  GPIOA

#define BOARD_SDSPI_TX_GPIO_PIN   GPIO_PIN_7



#define BOARD_SDSPI_RX_GPIO_PORT  GPIOA

#define BOARD_SDSPI_RX_GPIO_PIN   GPIO_PIN_6



#define BOARD_SDSPI_CLK_GPIO_PORT GPIOA

#define BOARD_SDSPI_CLK_GPIO_PIN  GPIO_PIN_5



#define BOARD_SDSPI_CS_GPIO_PORT  GPIOA

#define BOARD_SDSPI_CS_GPIO_PIN   GPIO_PIN_4



SDSPI_ApiRetStatus_Type sdspi_spi_init(void);

SDSPI_ApiRetStatus_Type sdspi_spi_freq(uint32_t hz);

SDSPI_ApiRetStatus_Type sdspi_spi_xfer(uint8_t *in, uint8_t *out, uint32_t len);



const SDSPI_Interface_Type board_sdspi_if =

{

    .baudrate = 1000000u, /* 1mhz. */

    .spi_init = sdspi_spi_init,

    .spi_freq = sdspi_spi_freq,

    .spi_xfer = sdspi_spi_xfer

};



uint32_t board_sdspi_delay_count;



static void board_sdspi_delay(uint32_t count)

{

    for (uint32_t i = count; i > 0u; i--)

    {

        __NOP();

    }

}



SDSPI_ApiRetStatus_Type sdspi_spi_init(void)

{

                SPI_InitType SPI_InitStructure;

        

                GPIO_SetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);

        

                /*!< SPI configuration */

    SPI_InitStructure.DataDirection = SPI_DIR_DOUBLELINE_FULLDUPLEX;

    SPI_InitStructure.SpiMode       = SPI_MODE_MASTER;

    SPI_InitStructure.DataLen       = SPI_DATA_SIZE_8BITS;

    SPI_InitStructure.CLKPOL        = SPI_CLKPOL_HIGH;

    SPI_InitStructure.CLKPHA        = SPI_CLKPHA_SECOND_EDGE;

    SPI_InitStructure.NSS           = SPI_NSS_SOFT;



    SPI_InitStructure.BaudRatePres = SPI_BR_PRESCALER_128;                //        562.5K SDMMC_CLOCK_400KHZ



    SPI_InitStructure.FirstBit = SPI_FB_MSB;

    SPI_InitStructure.CRCPoly  = 7;

    SPI_Init(SPI1, &SPI_InitStructure);



    /*!< Enable the SPI1  */

    SPI_Enable(SPI1, ENABLE);



    return SDSPI_ApiRetStatus_Success;

}



SDSPI_ApiRetStatus_Type sdspi_spi_freq(uint32_t hz)

{

                SPI_InitType SPI_InitStructure;

        

                GPIO_SetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);

        

                SPI_Enable(SPI1, DISABLE);

        

                /*!< SPI configuration */

    SPI_InitStructure.DataDirection = SPI_DIR_DOUBLELINE_FULLDUPLEX;

    SPI_InitStructure.SpiMode       = SPI_MODE_MASTER;

    SPI_InitStructure.DataLen       = SPI_DATA_SIZE_8BITS;

    SPI_InitStructure.CLKPOL        = SPI_CLKPOL_HIGH;

    SPI_InitStructure.CLKPHA        = SPI_CLKPHA_SECOND_EDGE;

    SPI_InitStructure.NSS           = SPI_NSS_SOFT;



    SPI_InitStructure.FirstBit = SPI_FB_MSB;

    SPI_InitStructure.CRCPoly  = 7;

    

                

    switch (hz)

    {

    case SDMMC_CLOCK_400KHZ:

                                SPI_InitStructure.BaudRatePres = SPI_BR_PRESCALER_128;                //        562.5K SDMMC_CLOCK_400KHZ

        break;

    default:

                                SPI_InitStructure.BaudRatePres = SPI_BR_PRESCALER_4;                //        18M SD_CLOCK_25MHZ

        break;

    }

                

                SPI_Init(SPI1, &SPI_InitStructure);

                /*!< Enable the sFLASH_SPI  */

    SPI_Enable(SPI1, ENABLE);

                

    return SDSPI_ApiRetStatus_Success;

}



/* SPI tx. */

void app_spi_putbyte(uint8_t c)

{

    /*!< Loop while DAT register in not emplty */

    while (SPI_I2S_GetStatus(SPI1, SPI_I2S_TE_FLAG) == RESET);



    /*!< Send byte through the SPI1 peripheral */

    SPI_I2S_TransmitData(SPI1, c);

}



/* SPI rx. */

uint8_t app_spi_getbyte(void)

{

    /*!< Wait to receive a byte */

    while (SPI_I2S_GetStatus(SPI1, SPI_I2S_RNE_FLAG) == RESET);



    /*!< Return the byte read from the SPI bus */

    return SPI_I2S_ReceiveData(SPI1);

}



uint8_t spi_xfer(uint8_t tx_dat)

{        

                /*!< Loop while DAT register in not emplty */

    while (SPI_I2S_GetStatus(SPI1, SPI_I2S_TE_FLAG) == RESET)

        ;



    /*!< Send byte through the SPI1 peripheral */

    SPI_I2S_TransmitData(SPI1, tx_dat);



    /*!< Wait to receive a byte */

    while (SPI_I2S_GetStatus(SPI1, SPI_I2S_RNE_FLAG) == RESET)

        ;



    /*!< Return the byte read from the SPI bus */

    return SPI_I2S_ReceiveData(SPI1);

}



SDSPI_ApiRetStatus_Type sdspi_spi_xfer(uint8_t *in, uint8_t *out, uint32_t len)

{

    uint8_t inbuf, outbuf;



                GPIO_ResetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);



    for (uint32_t i = 0u; i < len; i++)

    {

        inbuf = (in == NULL) ? SDSPI_DUMMY_DATA: *in++;

        outbuf = spi_xfer(inbuf);

        if (out)

        {

            *out = outbuf;

            out++;

        }

    }



                GPIO_SetBits(BOARD_SDSPI_CS_GPIO_PORT, BOARD_SDSPI_CS_GPIO_PIN);



    return SDSPI_ApiRetStatus_Success;

}



/* EOF. */

FATFS移植

因为SD卡都是需要文件系统支持才能进行读写操作，因此，需要移植FATFS文件系统

fatfs 的官方网站: http://elm-chan.org/fsw/ff/00index_e.html

我这里使用的是最新的R0.15 (November 6, 2022)版本

在工程内添加FATFS的驱动文件

添加.c文件

添加.h文件路径

diskio.c文件是移植的接口文件，里面需要根据实际使用情况实现接口函数

disk_status、disk_initialize、disk_read、disk_write、disk_ioctl等函数

这些函数的具体操作需要调用SD_SPI中的先关API

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/*-----------------------------------------------------------------------*/

/* Low level disk I/O module SKELETON for FatFs     (C)ChaN, 2019        */

/*-----------------------------------------------------------------------*/

/* If a working storage control module is available, it should be        */

/* attached to the FatFs via a glue function rather than modifying it.   */

/* This is an example of glue functions to attach various exsisting      */

/* storage control modules to the FatFs module with a defined API.       */

/*-----------------------------------------------------------------------*/



#include "ff.h"                        /* Obtains integer types */

#include "diskio.h"                /* Declarations of disk functions */

#include "sdspi.h"



/* Definitions of physical drive number for each drive */

#define DEV_RAM                0        /* Example: Map Ramdisk to physical drive 0 */

#define DEV_MMC                1        /* Example: Map MMC/SD card to physical drive 1 */

#define DEV_USB                2        /* Example: Map USB MSD to physical drive 2 */



SDSPI_ApiRetStatus_Type app_sdspi_ret;

SDSPI_CardHandler_Type app_sdspi_card;

extern const SDSPI_Interface_Type board_sdspi_if;



/*-----------------------------------------------------------------------*/

/* Get Drive Status                                                      */

/*-----------------------------------------------------------------------*/



DSTATUS disk_status (

        BYTE pdrv                /* Physical drive nmuber to identify the drive */

)

{

        DSTATUS stat;

        int result;



        switch (pdrv) {

        case DEV_RAM :

                //result = RAM_disk_status();



                // translate the reslut code here



                return stat;



        case DEV_MMC :

                //result = MMC_disk_status();

                stat = RES_OK;

                // translate the reslut code here



                return stat;



        case DEV_USB :

                //result = USB_disk_status();



                // translate the reslut code here



                return stat;

        }

        

        return STA_NOINIT;

}







/*-----------------------------------------------------------------------*/

/* Inidialize a Drive                                                    */

/*-----------------------------------------------------------------------*/



DSTATUS disk_initialize (

        BYTE pdrv                                /* Physical drive nmuber to identify the drive */

)

{

        DSTATUS stat;

        //int result;



        switch (pdrv) {

        case DEV_RAM :

                //result = RAM_disk_initialize();



                // translate the reslut code here



                return stat;



        case DEV_MMC :

                //result = MMC_disk_initialize();



                if(!SDSPI_Init(&app_sdspi_card, &board_sdspi_if)){

                        stat = RES_OK;

                }else{

                        stat = STA_NOINIT;

                }

                // translate the reslut code here



                return stat;



        case DEV_USB :

                //result = USB_disk_initialize();



                // translate the reslut code here



                return stat;

        }

        return STA_NOINIT;

}







/*-----------------------------------------------------------------------*/

/* Read Sector(s)                                                        */

/*-----------------------------------------------------------------------*/



DRESULT disk_read (

        BYTE pdrv,                /* Physical drive nmuber to identify the drive */

        BYTE *buff,                /* Data buffer to store read data */

        LBA_t sector,        /* Start sector in LBA */

        UINT count                /* Number of sectors to read */

)

{

        DRESULT res;

        //int result;

        uint8_t i;



        switch (pdrv) {

        case DEV_RAM :

                // translate the arguments here



                //result = RAM_disk_read(buff, sector, count);



                // translate the reslut code here



                return res;



        case DEV_MMC :

                // translate the arguments here

                        if(!SDSPI_ReadBlocks(&app_sdspi_card,buff, sector, count))

                        {

                                res = RES_OK;

                        }else{

                                res = RES_ERROR;

                        }

                //result = MMC_disk_read(buff, sector, count);

                



                // translate the reslut code here



                return res;



        case DEV_USB :

                // translate the arguments here



                //result = USB_disk_read(buff, sector, count);



                // translate the reslut code here



                return res;

        }



        return RES_PARERR;

}







/*-----------------------------------------------------------------------*/

/* Write Sector(s)                                                       */

/*-----------------------------------------------------------------------*/



#if FF_FS_READONLY == 0



DRESULT disk_write (

        BYTE pdrv,                        /* Physical drive nmuber to identify the drive */

        const BYTE *buff,        /* Data to be written */

        LBA_t sector,                /* Start sector in LBA */

        UINT count                        /* Number of sectors to write */

)

{

        DRESULT res;

        //int result;



        switch (pdrv) {

        case DEV_RAM :

                // translate the arguments here



                //result = RAM_disk_write(buff, sector, count);



                // translate the reslut code here



                return res;



        case DEV_MMC :

                // translate the arguments here



                //result = MMC_disk_write(buff, sector, count);

                if(!SDSPI_WriteBlocks(&app_sdspi_card,(uint8_t *)buff, sector, count))

                {

                        res = RES_OK;

                }else{

                        res = RES_ERROR;

                }



                // translate the reslut code here



                return res;



        case DEV_USB :

                // translate the arguments here



                //result = USB_disk_write(buff, sector, count);



                // translate the reslut code here



                return res;

        }



        return RES_PARERR;

}



#endif





/*-----------------------------------------------------------------------*/

/* Miscellaneous Functions                                               */

/*-----------------------------------------------------------------------*/



DRESULT disk_ioctl (

        BYTE pdrv,                /* Physical drive nmuber (0..) */

        BYTE cmd,                /* Control code */

        void *buff                /* Buffer to send/receive control data */

)

{

        DRESULT res;

        int result;



        switch (pdrv) {

        case DEV_RAM :



                // Process of the command for the RAM drive



                return res;



        case DEV_MMC :



                // Process of the command for the MMC/SD card

                switch(cmd)

                {

                        case GET_SECTOR_COUNT:

         *(DWORD *)buff = app_sdspi_card.blockCount;

         res = RES_OK;

         break;



      case GET_BLOCK_SIZE:

         *(DWORD *)buff = SDSPI_DEFAULT_BLOCK_SIZE;

         res = RES_OK;

         break;

                }



                return res;



        case DEV_USB :



                // Process of the command the USB drive



                return res;

        }



        return RES_PARERR;

}

FATFS定义了RAM MMC(SD/TF) USB设备的盘符，这些盘符在操作API时会用到

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/* Definitions of physical drive number for each drive */

#define DEV_RAM                0        /* Example: Map Ramdisk to physical drive 0 */

#define DEV_MMC                1        /* Example: Map MMC/SD card to physical drive 1 */

#define DEV_USB                2        /* Example: Map USB MSD to physical drive 2 */

ffconf.h内是FATFS的配置文件，相关配置项需要根据自己的实际情况进行配置

复制

/*---------------------------------------------------------------------------/

/  Configurations of FatFs Module

/---------------------------------------------------------------------------*/



#define FFCONF_DEF        80286        /* Revision ID */



/*---------------------------------------------------------------------------/

/ Function Configurations

/---------------------------------------------------------------------------*/



#define FF_FS_READONLY        0

/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)

/  Read-only configuration removes writing API functions, f_write(), f_sync(),

/  f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()

/  and optional writing functions as well. */





#define FF_FS_MINIMIZE        0

/* This option defines minimization level to remove some basic API functions.

/

/   0: Basic functions are fully enabled.

/   1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()

/      are removed.

/   2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.

/   3: f_lseek() function is removed in addition to 2. */





#define FF_USE_FIND                0

/* This option switches filtered directory read functions, f_findfirst() and

/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */





#define FF_USE_MKFS                1

/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */





#define FF_USE_FASTSEEK        0

/* This option switches fast seek function. (0:Disable or 1:Enable) */





#define FF_USE_EXPAND        0

/* This option switches f_expand function. (0:Disable or 1:Enable) */





#define FF_USE_CHMOD        0

/* This option switches attribute manipulation functions, f_chmod() and f_utime().

/  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */





#define FF_USE_LABEL        0

/* This option switches volume label functions, f_getlabel() and f_setlabel().

/  (0:Disable or 1:Enable) */





#define FF_USE_FORWARD        0

/* This option switches f_forward() function. (0:Disable or 1:Enable) */





#define FF_USE_STRFUNC        1

#define FF_PRINT_LLI                0

#define FF_PRINT_FLOAT        0

#define FF_STRF_ENCODE        0

/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and

/  f_printf().

/

/   0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.

/   1: Enable without LF-CRLF conversion.

/   2: Enable with LF-CRLF conversion.

/

/  FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2

/  makes f_printf() support floating point argument. These features want C99 or later.

/  When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character

/  encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE

/  to be read/written via those functions.

/

/   0: ANSI/OEM in current CP

/   1: Unicode in UTF-16LE

/   2: Unicode in UTF-16BE

/   3: Unicode in UTF-8

*/





/*---------------------------------------------------------------------------/

/ Locale and Namespace Configurations

/---------------------------------------------------------------------------*/



#define FF_CODE_PAGE        932

/* This option specifies the OEM code page to be used on the target system.

/  Incorrect code page setting can cause a file open failure.

/

/   437 - U.S.

/   720 - Arabic

/   737 - Greek

/   771 - KBL

/   775 - Baltic

/   850 - Latin 1

/   852 - Latin 2

/   855 - Cyrillic

/   857 - Turkish

/   860 - Portuguese

/   861 - Icelandic

/   862 - Hebrew

/   863 - Canadian French

/   864 - Arabic

/   865 - Nordic

/   866 - Russian

/   869 - Greek 2

/   932 - Japanese (DBCS)

/   936 - Simplified Chinese (DBCS)

/   949 - Korean (DBCS)

/   950 - Traditional Chinese (DBCS)

/     0 - Include all code pages above and configured by f_setcp()

*/





#define FF_USE_LFN                0

#define FF_MAX_LFN                255

/* The FF_USE_LFN switches the support for LFN (long file name).

/

/   0: Disable LFN. FF_MAX_LFN has no effect.

/   1: Enable LFN with static  working buffer on the BSS. Always NOT thread-safe.

/   2: Enable LFN with dynamic working buffer on the STACK.

/   3: Enable LFN with dynamic working buffer on the HEAP.

/

/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function

/  requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and

/  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.

/  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can

/  be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN

/  specification.

/  When use stack for the working buffer, take care on stack overflow. When use heap

/  memory for the working buffer, memory management functions, ff_memalloc() and

/  ff_memfree() exemplified in ffsystem.c, need to be added to the project. */





#define FF_LFN_UNICODE        0

/* This option switches the character encoding on the API when LFN is enabled.

/

/   0: ANSI/OEM in current CP (TCHAR = char)

/   1: Unicode in UTF-16 (TCHAR = WCHAR)

/   2: Unicode in UTF-8 (TCHAR = char)

/   3: Unicode in UTF-32 (TCHAR = DWORD)

/

/  Also behavior of string I/O functions will be affected by this option.

/  When LFN is not enabled, this option has no effect. */





#define FF_LFN_BUF                255

#define FF_SFN_BUF                12

/* This set of options defines size of file name members in the FILINFO structure

/  which is used to read out directory items. These values should be suffcient for

/  the file names to read. The maximum possible length of the read file name depends

/  on character encoding. When LFN is not enabled, these options have no effect. */





#define FF_FS_RPATH                0

/* This option configures support for relative path.

/

/   0: Disable relative path and remove related functions.

/   1: Enable relative path. f_chdir() and f_chdrive() are available.

/   2: f_getcwd() function is available in addition to 1.

*/





/*---------------------------------------------------------------------------/

/ Drive/Volume Configurations

/---------------------------------------------------------------------------*/



#define FF_VOLUMES                2

/* Number of volumes (logical drives) to be used. (1-10) */





#define FF_STR_VOLUME_ID        0

#define FF_VOLUME_STRS                "RAM","NAND","CF","SD","SD2","USB","USB2","USB3"

/* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.

/  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive

/  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each

/  logical drives. Number of items must not be less than FF_VOLUMES. Valid

/  characters for the volume ID strings are A-Z, a-z and 0-9, however, they are

/  compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is

/  not defined, a user defined volume string table is needed as:

/

/  const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...

*/





#define FF_MULTI_PARTITION        0

/* This option switches support for multiple volumes on the physical drive.

/  By default (0), each logical drive number is bound to the same physical drive

/  number and only an FAT volume found on the physical drive will be mounted.

/  When this function is enabled (1), each logical drive number can be bound to

/  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()

/  function will be available. */





#define FF_MIN_SS                512

#define FF_MAX_SS                512

/* This set of options configures the range of sector size to be supported. (512,

/  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and

/  harddisk, but a larger value may be required for on-board flash memory and some

/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured

/  for variable sector size mode and disk_ioctl() function needs to implement

/  GET_SECTOR_SIZE command. */





#define FF_LBA64                0

/* This option switches support for 64-bit LBA. (0:Disable or 1:Enable)

/  To enable the 64-bit LBA, also exFAT needs to be enabled. (FF_FS_EXFAT == 1) */





#define FF_MIN_GPT                0x10000000

/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and

/  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */





#define FF_USE_TRIM                0

/* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)

/  To enable Trim function, also CTRL_TRIM command should be implemented to the

/  disk_ioctl() function. */







/*---------------------------------------------------------------------------/

/ System Configurations

/---------------------------------------------------------------------------*/



#define FF_FS_TINY                0

/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)

/  At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.

/  Instead of private sector buffer eliminated from the file object, common sector

/  buffer in the filesystem object (FATFS) is used for the file data transfer. */





#define FF_FS_EXFAT                0

/* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)

/  To enable exFAT, also LFN needs to be enabled. (FF_USE_LFN >= 1)

/  Note that enabling exFAT discards ANSI C (C89) compatibility. */





#define FF_FS_NORTC                1

#define FF_NORTC_MON        1

#define FF_NORTC_MDAY        1

#define FF_NORTC_YEAR        2022

/* The option FF_FS_NORTC switches timestamp feature. If the system does not have

/  an RTC or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable the

/  timestamp feature. Every object modified by FatFs will have a fixed timestamp

/  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.

/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be

/  added to the project to read current time form real-time clock. FF_NORTC_MON,

/  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.

/  These options have no effect in read-only configuration (FF_FS_READONLY = 1). */





#define FF_FS_NOFSINFO        0

/* If you need to know correct free space on the FAT32 volume, set bit 0 of this

/  option, and f_getfree() function at the first time after volume mount will force

/  a full FAT scan. Bit 1 controls the use of last allocated cluster number.

/

/  bit0=0: Use free cluster count in the FSINFO if available.

/  bit0=1: Do not trust free cluster count in the FSINFO.

/  bit1=0: Use last allocated cluster number in the FSINFO if available.

/  bit1=1: Do not trust last allocated cluster number in the FSINFO.

*/





#define FF_FS_LOCK                0

/* The option FF_FS_LOCK switches file lock function to control duplicated file open

/  and illegal operation to open objects. This option must be 0 when FF_FS_READONLY

/  is 1.

/

/  0:  Disable file lock function. To avoid volume corruption, application program

/      should avoid illegal open, remove and rename to the open objects.

/  >0: Enable file lock function. The value defines how many files/sub-directories

/      can be opened simultaneously under file lock control. Note that the file

/      lock control is independent of re-entrancy. */





#define FF_FS_REENTRANT        0

#define FF_FS_TIMEOUT        1000

/* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs

/  module itself. Note that regardless of this option, file access to different

/  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()

/  and f_fdisk() function, are always not re-entrant. Only file/directory access

/  to the same volume is under control of this featuer.

/

/   0: Disable re-entrancy. FF_FS_TIMEOUT have no effect.

/   1: Enable re-entrancy. Also user provided synchronization handlers,

/      ff_mutex_create(), ff_mutex_delete(), ff_mutex_take() and ff_mutex_give()

/      function, must be added to the project. Samples are available in ffsystem.c.

/

/  The FF_FS_TIMEOUT defines timeout period in unit of O/S time tick.

*/







/*--- End of configuration options ---*/

片内FLASH_IAP移植

此部分直接使用原厂提供的IAP函数即可，将文件添加到工程

添加.c文件

添加.h文件路径

复制

#include <stdio.h>

#include "iap.h"

#include "string.h"



iapfun jump2app;  

uint8_t uart_receiveBIN_ok;



uint8_t pages_number = 0;

uint32_t ready_write_addr = 0;



uint8_t flash_buf[2048];

extern uint8_t receive_app_done;

extern void IAP_UPDATE_APP(void);



/**================================================================

                读取Flash

================================================================*/

uint32_t FLASH_ReadWord(uint32_t address)

{

  return *(__IO uint32_t*)address; 

}

/**================================================================

                APP 跳转

                appxaddr:用户代码起始地址.

================================================================*/

void iap_load_app(u32 appxaddr)

{

        if(((*(vu32*)appxaddr)&0x0FFFFFFF) < 1024*512)                // 检查栈顶地址是否合法.

        { 

                jump2app = (iapfun)*(vu32*)(appxaddr+4);                                

                __set_MSP(*(vu32*)appxaddr);                                                // 初始化堆栈指针

                jump2app();                                                                                // 跳转到APP.

        }

}                

/**================================================================

================================================================*/

int32_t app_flag_write(uint32_t data ,uint32_t start_add)

{

        FLASH_Unlock();

        //

        FLASH_EraseOnePage(start_add);                        //写之前先擦一遍，每次擦2K

        if (FLASH_COMPL != FLASH_ProgramWord(start_add, data))                //写

        {

                FLASH_Lock();

                //printf("flash write fail! \r\n");

                return 1;

        }

        FLASH_Lock();

    return 0;

}

/**================================================================

================================================================*/

#define FLASH_PAGE_SIZE                 2048                                 



/**

 * [url=home.php?mod=space&uid=247401]@brief[/url] 

 * @param void

 * @return

 * - `SUCCESS： 表示操作成功

 * - 其它值表示出错

 */

int32_t app_flash_write(uint32_t *data ,uint32_t Flash_address)

{

    uint32_t i;

        uint32_t start_add;

        start_add = Flash_address;

                

        FLASH_Unlock();

        //

        for(i = 0;i<FLASH_PAGE_SIZE/FLASH_PAGE_SIZE;i++)

        {

                FLASH_EraseOnePage(start_add+i*FLASH_PAGE_SIZE);                        //写之前先擦一遍，每次擦2K

        }

        //

        for(i=0;i<FLASH_PAGE_SIZE/4 ;i++)

        {

                if (FLASH_COMPL != FLASH_ProgramWord(start_add+i*4, data[i]))                //写

                {

                        FLASH_Lock();

                        //printf("flash write fail! \r\n");

//                        receive_app_done = 0;

                        return 1;

                }

        }

        FLASH_Lock();

    return 0;

}

/**================================================================

                //升级APP

================================================================*/

void IAP_UPDATE_APP(void)

{

        ready_write_addr = FLASH_APP_BASE_ADDR + pages_number*2048;

        //

        while(app_flash_write((uint32_t *)flash_buf , ready_write_addr));                //IAP每次升级2K

        //

        memset(flash_buf,0x00,2048);

        pages_number++;



}

至此，软件包的移植工作就都完成了，接下来实现具体的逻辑操作。

2.2 升级流程说明

本实例仅实现基础功能，在实际使用过程中需要根据实际情况进行修改

整体流程如下：

整个方案流程如下

1 MCU启动

2 bootloader判断升级标志状态,标志不为0x12345678，进入步骤3，标志为0x12345678，进行跳转至app，进入步骤7

3 bootloader初始化外设

4 bootloader初始化文件系统

5 bootloader检查app升级文件是否存在，升级文件存在，输出提示信息，并等待升级命令。未收到升级命令则正常运行。

6 bootloader收到升级命令，读取SD卡内升级文件写入app区，写入完成，跳转至APP

7 app判断升级标志状态，标志不为0x12345678，代表第一次进入app,需要将升级标志写为0x12345678。标志为0x12345678，代表从bootloader正常启动。

8 app初始化外设

9 app初始化文件系统

10 app检查app升级文件是否存在，升级文件存在，输出提示信息，并等待升级命令

11 app收到升级命令，需要先擦除升级标志，并进行系统复位，回到步骤1。未收到升级命令则正常运行。

我的这个SD_IAP实例因为BootLoader和application功能都十分类似，因此使用一个工程下的不同项目进行维护

在不同点使用宏定义进行编译选择。在app内添加SD_SPI_APP宏定义作为编译开关。

不同项目输出的bin文件路径也分别进行了设置，防止出现错误

这里重点说一个MDK的小技巧，在进入bootloader和application后都要进行中断向量的重新映射才能使程序正常运行，例如：

一般的做法都是在bootloader和application使用不同的宏定义区实现，比如

这种方式在修改时有时会遗忘，比较麻烦，MDK可采用下图的方式修改，一劳永逸。不用再为不同起始地址配置不同的宏定义，一切都由MDK根据FLASH地址的配置自动设置。

复制

void System_Init(void)

{

    /* 设置中断向量表后，开启总中断 */

    extern int Image$ER_IROM1$Base;

    __disable_irq();

    SCB->VTOR = (uint32_t)&Image$ER_IROM1$Base;

    __enable_irq();

}

3. 升级兼容性测试

为了测试此升级程序的兼容性，我准备了SD卡（512MB）TF卡（16GB）MMC卡（1GB）分别使用不同的文件格式进行了测试

SD卡（512MB）FAT格式，升级正常

SD卡（512MB）FAT32格式，升级正常

SD卡（512MB）exFAT格式，升级失败

TF卡（16GB），FAT32格式，升级正常，不支持FAT，没测试

TF卡（16GB），exFAT格式，升级失败

MMC卡（1GB）任何格式升级都失败

失败原因应该是文件系统的配置有问题，理论上3中卡都可以支持，如需对各种格式的卡进行兼容需要仔细研究ffconf.h内的配置项，根据需求进行配置。

源码：

Nationstech.N32G45x_Library.2.1.0（SD_IAP）.zip (5.3 MB, 下载次数: 35)

视频：

[活动专区] 【开源活动】-基于国民N32G45x的SD卡IAP升级开发

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