STM32F7+STM32CubeMX5.21+SD+FATFS* I A3 N# h, w: H
1、STM32CubeMX配置
+ H; I" d& Y4 q7 s时钟配置
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SDMMC配置0 l, j- l. q9 H8 _- p
Connectivity->SDMMC1/ D$ I: @, Y4 W
MODE选择: SD 4 bits Wide bus
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7 a' S. c$ ~4 Q9 C% t1 s DMA Setting设置DMA读写。9 z- f- u1 ~* F7 i1 c0 M1 S6 m. L1 f2 r
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5 b; Z, g$ b$ h0 I 修改CDMMC传输时钟分频。 \6 i5 Q' Q) K2 _9 g0 j9 \% ]
/* SDMMC Data Transfer Frequency (25MHz max) */8 g4 M! X5 [- |
APB2=108MHZ, 108/6=18MHZ。频率过高读写SD卡是会出现FR_DISK_ERR错误。( o% ?- u2 ]; j/ |- H4 k; u. S
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' Q8 U' f! A8 R; ?$ z 其他默认' P8 y7 {/ x! k7 L' O9 P
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FATFS配置
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在FATFS配置中选择简体中文字GBK编码支持中文,使能长文件名,缓存存储在堆(STACK)中。
5 U w" J1 z1 g4 M: C Set->Defines修改两项" u' G3 m9 m- T- S4 C9 L
其他默认
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3 A7 e, N, W8 _' ?: r 点击菜单栏中Project->Setting修改堆的大小,堆设置为0x1000。
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( Z+ w2 \( d9 K, y2、main函数增加FASFS相关测试代码段。/ l* e' X2 W4 r- k) Y$ j
挂载工作区时,调用bsp_driver_sd.c函数BSP_SD_Init()进行SD卡初始化设置。
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- /**% s% C5 x7 e8 E
- ******************************************************************************. L+ z5 q3 y5 N- i* Y' ]1 O
- * @file : main.c
5 o6 w6 `$ a2 r0 v4 {4 t- E2 O- h - * @brief : Main program body
) z' U# q1 ]' S' B - ******************************************************************************
* ^0 A4 {" }( n+ ` c( C - * @attention
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0 A+ J+ G. K# ^4 v* } - * <h2><center>© Copyright (c) 2020 STMicroelectronics.
3 R4 h |7 f: g8 p - * All rights reserved.</center></h2>) r$ n# E( |/ A
- *
: ~3 P( @$ l( h: ~5 N - * This software component is licensed by ST under Ultimate Liberty license- y r/ c0 j+ w) H( B2 z- O
- * SLA0044, the "License"; You may not use this file except in compliance with: ^" [" B! r& F; `
- * the License. You may obtain a copy of the License at:
@2 m+ k, M& R; T7 ? - * <a href="http://www.st.com/SLA0044" target="_blank">www.st.com/SLA0044</a>6 d$ u4 j. _. R# ?
- *
' r$ k4 _! ]; y: S - ******************************************************************************. K& r' {) a& U( u5 `9 ]4 i
- */
Q. F# Y& e# _ - /* USER CODE END Header */' S: j8 d" S0 x9 H. m0 R
% f" M1 l7 O& z) \1 ~; U- /* Includes ------------------------------------------------------------------*/
8 `. j( |* B& O$ k* | K - #include "main.h": \& X6 V4 J4 u
- #include "dma.h"4 v0 z$ t- O# [. z( h
- #include "fatfs.h"3 l. x8 q+ g6 J& o( |7 ?
- #include "sdmmc.h"8 o; ^9 [. K7 o- c7 X* n V8 ~
- #include "gpio.h"! o4 u' l5 h8 P" ~2 ^$ U
6 [1 z$ S( j( R2 m$ i4 {- /* Private function prototypes -----------------------------------------------*/
3 u8 G8 q. u1 Z3 A - void SystemClock_Config(void);! L' s4 u) S) R& A
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- HAL_SD_CardInfoTypeDef SDCardInfo; $ g: _# R# D9 n( T+ A( @7 D; F
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- FRESULT ret_sd;' _5 Q0 [. K1 c
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- uint8_t rtext[100]; /* File read buffers */3 G5 x( `4 {& Y* F* c. x
( W% L; E! V6 B7 @- /**! v/ \9 ?1 c/ {; ~9 ]! I
- * @brief The application entry point.
5 C6 a7 |- w: }- i9 M - * @retval int
* j& ~ F( P5 X6 q v4 m - */
3 ]$ N+ o3 s8 b7 p - int main(void)/ O) ^( N: |. C p# Q
- {% ~' E T) o. E# P. ]* P! F( x0 `
- /* USER CODE BEGIN PV */
7 Q9 Z8 n2 m. T0 }$ l - /* Private variables ---------------------------------------------------------*/
* _( k/ \0 }! K, ?, B - BYTE work[_MAX_SS];* `% J+ `& S7 l2 R* X( ]; D
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- FATFS fs; // Work area (file system object) for logical drive
' A) w: L D O6 Q( Z0 T! w; ?. {5 e+ e- @ - FIL file; // file objects
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. g+ {/ O' v3 B) k5 b m/ {- uint32_t byteswritten; /* File write counts */( K; g A1 x- j0 `! t3 g u1 M# a
- uint32_t bytesread; /* File read counts */
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3 A) s3 u- P+ u- uint8_t wtext[] = "STM32 working with FatFs Test"; /* File write buffer */
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- char filename[] = "STM32cube.txt";
1 `# q X# O1 ^. ], n - /* USER CODE END PV */& M% [. q; D& a" S6 c$ C
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- /* Enable I-Cache---------------------------------------------------------*// E# F* d- P" S. l( j u4 _
- SCB_EnableICache();) l4 H* h# \) w! l9 u
8 _7 j# S# l! Z# Q0 H- /* Enable D-Cache---------------------------------------------------------*/" ]9 d0 |) s' T$ f' u2 Z6 ^
- SCB_EnableDCache();6 s% f/ j) K$ D& P3 ^ |
% P2 b9 V) V# Z* m8 F- /* MCU Configuration--------------------------------------------------------*/
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- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
/ O5 c! Z4 N7 U* w - HAL_Init();
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- /* Configure the system clock */, I# |6 x/ J- x% w5 n3 D* ]
- SystemClock_Config();
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- /* Initialize all configured peripherals */
: `/ } S! R- H; K/ H2 i4 q - MX_DMA_Init(); //开启DMA相关时钟、设置中断优先级4 A4 \9 b) M; U: Y# E7 [; F
- MX_SDMMC1_SD_Init(); //设置SD初始化变量,并未进行初始化
7 C$ { H! g2 `/ y; C - MX_FATFS_Init(); //链接兼容的diskio驱动程序并增加活动数量链接驱动程序,创建盘符
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- /*----------------------- 文件系统测试:挂载测试 -----------------------------*/
! C" R* q, r& h" {( w- c. T7 F - ret_sd = f_mount(&fs, "0:", 1); //挂载工作区
5 a2 L& c" _, D2 A. u - /* 如果没有文件系统就格式化创建创建文件系统 */6 d' S5 O, R9 y3 z- _
- if(ret_sd == FR_NO_FILESYSTEM); W* z" C! M8 C# n
- {' B# q _% l! h0 }& S
- /* 格式化 */$ j r7 n/ b+ A
- ret_sd=f_mkfs("0:", FM_FAT, 0, work, sizeof(work));
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* b; {* S. \+ ~* | - if(ret_sd == FR_OK)
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5 |- t; F. ^0 m2 t9 y2 i o4 { - /* 格式化后,先取消挂载 */2 W" q n) C& z( ^- E9 L1 s
- ret_sd = f_mount(NULL,"0:",1); ) K- T" [ `9 g: L
- /* 重新挂载 */ 2 L N8 c, Q$ T0 S
- ret_sd = f_mount(&fs,"0:",1);
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- else
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- //格式化失败9 J1 |2 X E3 h( i; I$ P* `! v
- while(1);
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- else if(ret_sd!=FR_OK)! _& L1 Z( J6 k- B
- {
, y+ s# d2 b$ r8 D& [9 Z9 J - //SD卡挂载文件系统失败9 E8 Y, [8 i+ i" j J) O2 D
- //可能原因:SD卡初始化不成功& u3 c$ I8 Z+ \1 }% l2 h
- while(1);
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- / V% B" Y; n; r3 ^6 L1 ?
- /*----------------------- 文件系统测试:写测试 -----------------------------*/! J) ^1 P# @" S/ B+ Q
- /* 打开文件,如果文件不存在则创建它 */
0 ]5 y+ ?. \7 t- z. C# _ - ret_sd = f_open(&file, "STM32.txt", FA_CREATE_ALWAYS | FA_WRITE );
1 z j8 c( S" [9 Y; g - if ( ret_sd == FR_OK )
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* }/ E! R7 T! x - //打开/创建FatFs读写测试文件.txt文件成功,向文件写入数据。/
# q' I- K. E+ D1 ^) o: ]$ s: \ - /* 将指定存储区内容写入到文件内 */
# B9 l& ]6 J, |. c" g" j$ ` - ret_sd=f_write(&file, wtext,sizeof(wtext),&byteswritten);% x) j4 H: F, L, ?5 \! q- H( f
4 X9 I! D! w4 I" Y8 H( z, y- /* 不再读写,关闭文件 */! n A; _$ P/ ?; t3 `( R
- f_close(&file);7 v. R3 |1 L; n3 k
- }
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- /*------------------- 文件系统测试:读测试 ------------------------------------*// F2 i& D) R0 W3 \& j
- ret_sd = f_open(&file, "STM32.txt", FA_OPEN_EXISTING | FA_READ); Y% w0 c. _: l8 ^! C- u2 G
- if(ret_sd == FR_OK)+ c( z3 {$ \0 W2 n* j6 N
- {
5 P8 o! k0 p, E u - //打开文件成功
9 f4 _3 r, q$ x* Q% K, ?$ _ - ret_sd = f_read(&file, rtext, sizeof(rtext), &bytesread);
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- /* 不再读写,关闭文件 */
' Z ?4 v O2 |4 l - f_close(&file);
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( w5 n. C( U6 n6 J4 P4 ?% q( @- /* 不再使用文件系统,取消挂载文件系统 */
" o S; e" {" z' m3 M - f_mount(NULL,"0:",1);
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- HAL_SD_GetCardInfo(&hsd1, &SDCardInfo);. X7 A) l' c. r( Q
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0 P, Q! v7 Z9 N' p$ g" b - /* USER CODE END WHILE */& x0 _9 _6 a% ~2 q) g% n$ h% S
6 m* L% A- W% @) `$ ~- /* USER CODE BEGIN 3 */9 E! i" T. d' w
- }& p, @& L. K. g" I; I3 [) ` m
- /* USER CODE END 3 */
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复制代码
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