STM32F7+STM32CubeMX5.21+SD+FATFS2 Y8 F& R& X3 s+ b: r+ d2 X+ n( Q
1、STM32CubeMX配置
% v/ Q r8 B& s: ]9 V时钟配置0 V0 P6 U; U- S6 B% b
- o9 w; k- h' L. w9 t* s& ]
4 a* k4 a2 m( S l( j: P2 `
1 L7 Y; O0 o% \. } e1 ]
SDMMC配置0 l. S0 _$ \$ q8 [, _8 t
Connectivity->SDMMC1- e9 @" i; V# i1 ~2 F4 n/ F
MODE选择: SD 4 bits Wide bus3 _' h6 B0 a- T" f- S' a+ I
NVIC Setting
- }4 @4 H6 b% H" {" L+ h5 `
" [" L7 l0 X0 ?+ @% |' X% v: l8 ]( W' [, o
DMA Setting设置DMA读写。
: a+ S1 x! V9 ?" r* @: N+ L% r$ U# t5 G. G" c! n8 n
& ~+ S1 O. d+ B l) J0 o' `, Q. C9 m5 _( f
修改CDMMC传输时钟分频。- L' S+ r9 S% F/ ]1 M' l- f
/* SDMMC Data Transfer Frequency (25MHz max) */
/ r9 S4 w; B3 E, Y* A7 j' r APB2=108MHZ, 108/6=18MHZ。频率过高读写SD卡是会出现FR_DISK_ERR错误。
2 J: l4 _" k4 ]2 j9 o# f/ w& E4 H4 H( ^0 g, t9 H2 q8 c) R5 F. N3 i
/ V7 Q9 h1 u, m) i
/ P- u4 R9 I$ Q- w3 B 其他默认; U' X% z9 U- R* Q1 i$ S ?
g9 f' k" o/ |7 z2 Y; f% E7 u3 n# w7 `5 g
" g& Q# M' A- R8 r6 l! b; CFATFS配置$ U7 v9 e: {( m2 g' X3 z5 W
Middleware->FATFS
9 I! K- M- A% v4 n 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。$ E6 B6 e4 m9 p; {/ Z
Set->Defines修改两项
' l$ s2 j5 A4 z# ~! j 其他默认
+ f% F3 r/ |1 C: ~% g0 g2 ?1 O, e9 G+ O- d/ j
3 D3 L3 }$ v$ Y% j; b2 G/ m* `7 q3 {) i4 X
点击菜单栏中Project->Setting修改堆的大小,堆设置为0x1000。
# i3 y% D$ @/ g2 K
6 W4 K6 f4 x% a& J+ C! y$ m) M, _- q& Y& x: q# {# E
1 Z" l+ O( C9 d! R2、main函数增加FASFS相关测试代码段。
) ^- j/ g. i6 S: B; j, X 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。
, M- A) Y* k# @6 y4 n; G$ f6 f) P+ A' z8 |
- /**
* u- T: t9 w- a - ******************************************************************************
, Z# o& O7 h; }1 n9 p0 s: \! M' ~ - * @file : main.c
4 |6 [- A1 f& Z5 W - * @brief : Main program body
. }3 Y6 G, \6 g3 {2 t7 t; g - ******************************************************************************$ f; d# K3 ~' u- I* o7 `1 ]" U0 o
- * @attention
# X# @ M' D5 H3 O; O9 {- r {& h - *) ?& s2 k. y; e2 a6 x
- * <h2><center>© Copyright (c) 2020 STMicroelectronics.8 @( X, I" ^7 W% j) }
- * All rights reserved.</center></h2>
3 c( A: P/ f. ?* f1 X6 f - *
4 N7 g7 ^$ ^( c0 z$ a. x - * This software component is licensed by ST under Ultimate Liberty license+ H) n1 |" I6 S* q1 D5 W
- * SLA0044, the "License"; You may not use this file except in compliance with
: C5 c; V+ w; z" f2 z - * the License. You may obtain a copy of the License at:) r# v6 g8 a5 ?3 |8 d
- * <a href="http://www.st.com/SLA0044" target="_blank">www.st.com/SLA0044</a>
) _. Y0 r2 ?8 p, h4 f2 m0 j2 g - *
8 x, Q% U2 E9 N4 j - ******************************************************************************
/ i, j3 y3 H, N - */$ `: U `7 v# J) ]
- /* USER CODE END Header */2 e! T# G& }9 c. D, q4 ?
; N4 \" f3 z5 f- /* Includes ------------------------------------------------------------------*/
& I" {- [. u* {. P# }- ^0 c) }& V - #include "main.h"
$ g6 B C o& p1 U* C - #include "dma.h". T& N/ [- L& q5 [& P, W6 D
- #include "fatfs.h"6 h! D$ [! W; \) o1 s4 w9 ?
- #include "sdmmc.h"
$ G7 S0 I, @+ A) [ - #include "gpio.h"
2 b" [- _0 i. Y9 b& k0 L, j - ; q+ _8 A) |$ I$ V& M- B' i
- /* Private function prototypes -----------------------------------------------*/% n* v4 Y5 b$ w5 e; ~$ N" D, w
- void SystemClock_Config(void);
9 [. p9 P, V2 U! ^1 ^+ t/ {' a
: z" t( g- h' j- HAL_SD_CardInfoTypeDef SDCardInfo; 1 Z' l% s2 u$ O! o# i4 U
" p; r* G2 \+ N, v5 G- FRESULT ret_sd;
! v1 n+ y( x) r/ m
' V( d: S6 e! `3 H Y, P9 _# r! q) f: g- uint8_t rtext[100]; /* File read buffers */
# {( p% J. e) u4 o
& h- M* N9 z% U% I( m7 j- /**
1 Z& ?# I2 f/ D$ C5 ]* V - * @brief The application entry point.
, V8 E U8 m" ^/ H - * @retval int" n' [8 |' B: C6 q- r9 y7 S
- */
4 S# o% r( @0 d6 w: F) ? - int main(void). B4 O% P5 | q. q; U
- {
; {% r! |; @3 X% F# f - /* USER CODE BEGIN PV */" d/ J4 c2 m; Z3 f2 ]9 x
- /* Private variables ---------------------------------------------------------*/6 q% h* P, I* Y" b$ |
- BYTE work[_MAX_SS];* |2 ]6 S; H/ J9 d- L
-
; [9 O a7 q8 D' `# R7 `: k - FATFS fs; // Work area (file system object) for logical drive1 P1 ?7 D! S. c3 Z0 U
- FIL file; // file objects2 D1 H+ W5 t& H
/ t( F! v5 I2 p0 [- uint32_t byteswritten; /* File write counts */
9 U& T2 K6 K/ o7 b" [' b - uint32_t bytesread; /* File read counts */
2 \+ B, @) R6 P; y% W8 |. Z8 ^
" |& ] Z, f; n3 s- uint8_t wtext[] = "STM32 working with FatFs Test"; /* File write buffer */, D2 d, D1 a( X. Y0 C: f
- 4 q3 v, r* m+ u8 @; x* I% |- H
- char filename[] = "STM32cube.txt";
" g/ J+ [5 W# r% [6 f7 f - /* USER CODE END PV */
5 O v r& W# D0 ^! {3 T
5 j! \) v, W6 J- /* Enable I-Cache---------------------------------------------------------*/9 E3 M) |- i% k8 @/ @4 m
- SCB_EnableICache();
+ n7 b! r6 D+ F! b: Y5 x
: n1 Y. O6 S5 T- /* Enable D-Cache---------------------------------------------------------*/
# |$ b ]! W6 j9 \# n - SCB_EnableDCache();
& n5 ~3 o8 h% d, P - 4 Y/ P5 G$ E3 ^: d
- /* MCU Configuration--------------------------------------------------------*/+ r) e0 N* D! i
0 F) `* q4 x8 L# Q5 Y) r- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
" L9 d P0 n- G1 ?/ E. K8 | - HAL_Init();
3 I [8 ]- s' h& ~ { - , p7 R3 \' h; O* @
- /* Configure the system clock */+ j" N3 i: }8 ~3 P
- SystemClock_Config();* Y6 m* ]8 F5 ^8 I# W$ x: |% W
7 y: s q) I) d4 G" f- /* Initialize all configured peripherals */" q. n8 T3 W: x+ d4 Q
- MX_DMA_Init(); //开启DMA相关时钟、设置中断优先级
" q6 A0 T& g ^ - MX_SDMMC1_SD_Init(); //设置SD初始化变量,并未进行初始化3 Y" o; A# E' W. ^4 O
- 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
9 A; |6 Y- w4 k5 s3 e M+ {
2 c! {0 w" u0 g) M; u: a- /*----------------------- 文件系统测试:挂载测试 -----------------------------*/' y1 Q3 U2 X8 d9 J" z, }
- ret_sd = f_mount(&fs, "0:", 1); //挂载工作区* S+ d2 {* z* Y- w# K# V' l, T
- /* 如果没有文件系统就格式化创建创建文件系统 */
* N z! a6 `: ~1 @( X+ y - if(ret_sd == FR_NO_FILESYSTEM)
3 M9 Q4 l' b/ g" s6 I - {2 n- W3 Y! {3 z, s, P( N% G' b# t
- /* 格式化 */
K3 v& C2 p1 p: b4 b( x- ^ - ret_sd=f_mkfs("0:", FM_FAT, 0, work, sizeof(work));
! {/ C. H2 Q9 R -
/ f8 F! b$ w. t4 k5 o e1 w+ Z - if(ret_sd == FR_OK)
% ~" T- Z" p5 E0 }6 _ L - {
. k- g3 t% `+ d! ]/ ]4 F& _5 ` - /* 格式化后,先取消挂载 */. {' C! ]. S" j
- ret_sd = f_mount(NULL,"0:",1);
! Y: U' r2 F, ?3 T - /* 重新挂载 */
9 c$ u8 p, L. L9 m6 [+ d- l- f8 S - ret_sd = f_mount(&fs,"0:",1);& H5 v9 @/ }6 U Y2 X% n
- }$ c$ V; }9 a9 E7 y$ J( ~. ?
- else2 s( U( I( w) v
- {) Q7 n2 A7 h @+ H
- //格式化失败
# m) F5 t- `; a2 K - while(1);
0 q; o2 F: ~' e - }$ \& b9 B: o% N( @
- }
4 _$ a1 i: L6 [+ m( M/ D" t$ U - else if(ret_sd!=FR_OK)! a* S( p) j1 Y$ L6 f; n3 T3 z! ?/ l
- {
" T/ ~4 h% J" L8 p( J n - //SD卡挂载文件系统失败3 O V! z+ `2 ~
- //可能原因:SD卡初始化不成功2 Y0 J6 Y% C/ `
- while(1);
, m8 f& m1 ?3 t9 r3 c, Z. i - }! d* Y- b) I7 }
- : n: P) [" s; O% j
- /*----------------------- 文件系统测试:写测试 -----------------------------*/. U) B \# M, I
- /* 打开文件,如果文件不存在则创建它 */
4 Q: K7 X0 ~. S# V9 _ - ret_sd = f_open(&file, "STM32.txt", FA_CREATE_ALWAYS | FA_WRITE );
0 ]" @: v' Z# E: G) O1 A! B3 T- B3 H - if ( ret_sd == FR_OK )
5 Z7 H& f _ m7 `$ T% z! j, e - {
' k0 M- r0 W" P8 c" w - //打开/创建FatFs读写测试文件.txt文件成功,向文件写入数据。/( J. L3 _( a$ D) |8 |" w: b
- /* 将指定存储区内容写入到文件内 */
$ I! E/ t& F+ r% q; ?7 ` - ret_sd=f_write(&file, wtext,sizeof(wtext),&byteswritten);6 U+ W) K2 ` f/ @& [
- % @( X5 V" E. [1 W5 T1 A5 b) k, g
- /* 不再读写,关闭文件 */ g3 l+ j/ p, x. g6 [+ b
- f_close(&file);1 M3 [& a8 r0 `+ `% h$ B
- }
4 d" L- g! l+ o' C - 4 x0 c) G+ u* `
-
" }# L) @& n3 j5 [, s7 z1 l- U - /*------------------- 文件系统测试:读测试 ------------------------------------*/
. r y" E D4 V1 Z# K3 J - ret_sd = f_open(&file, "STM32.txt", FA_OPEN_EXISTING | FA_READ); 8 v7 I' R5 v/ A6 Y8 C# i
- if(ret_sd == FR_OK)
0 q3 U& [( f' G - {
) v$ Y. I3 k4 k1 n+ h3 j. B8 E1 R - //打开文件成功
" A) x# v8 Q* E2 P$ H - ret_sd = f_read(&file, rtext, sizeof(rtext), &bytesread); 5 }) _- X. c& [" M, C- J
- }
5 u' c% S- m% y t5 r' d" W; R
: V, B& F; ]$ r3 X/ P, X- /* 不再读写,关闭文件 */4 e- M/ q' M" W' m! R* T
- f_close(&file);
% l9 r) C# F0 r( I# k8 e6 [ - 1 U7 ?. T/ h l o. @
- /* 不再使用文件系统,取消挂载文件系统 */& j9 }6 }9 V/ X1 X* M: ?! _
- f_mount(NULL,"0:",1);5 B( w" m5 _' H) o3 O
-
2 w! I& q f9 a+ L3 L- S- F# F( { - HAL_SD_GetCardInfo(&hsd1, &SDCardInfo);
8 F9 T: p) x( j7 E; q2 | - c1 Z( t+ i+ p1 A8 r+ ]+ A
- while (1)
3 r: o7 t% N$ J1 l' V - {
4 d9 N6 o3 J1 f/ Z - /* USER CODE END WHILE */. N! E3 @4 `2 e/ W
- W4 q- E7 e/ I) J; R, r* j
- /* USER CODE BEGIN 3 */2 U4 C1 U6 Q+ j! Y1 Y
- }
; O6 F2 }. N0 V - /* USER CODE END 3 */
5 d( R( N* j# Y - }
1 O0 f+ m! c3 Y+ B- q - 0 y( f, t( x. `/ p$ B
复制代码
7 |& \! A1 q6 j$ V% g8 `
/ Y6 f5 g8 b9 |1 \ |