STM32F7+STM32CubeMX5.21+SD+FATFS( h q( k1 E! e+ j4 \, k
1、STM32CubeMX配置9 R. @" C4 H2 Y
时钟配置6 ^9 Y3 f$ r- N. C9 A; f9 X
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SDMMC配置. t, T- [2 r# U* E% `5 c( V
Connectivity->SDMMC1# E& z H0 {" Q/ }
MODE选择: SD 4 bits Wide bus( [ u% X- f# [3 d6 G
NVIC Setting7 k& {7 v( K8 o0 W
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DMA Setting设置DMA读写。+ d+ l0 E: Z* b7 m
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修改CDMMC传输时钟分频。+ X% `( @6 _. H4 e. K
/* SDMMC Data Transfer Frequency (25MHz max) */- R/ S, I5 G. C
APB2=108MHZ, 108/6=18MHZ。频率过高读写SD卡是会出现FR_DISK_ERR错误。/ D: N" V9 t% X2 d4 ^. Q, e
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1 X# [ `9 g$ V5 ]" c8 x 其他默认
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FATFS配置5 A' y9 ^2 M1 Z! O. H, `% m) R
Middleware->FATFS
1 l# U- I; D# }! n3 h0 Q 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。
% j4 L: e# r" M- i Set->Defines修改两项$ }' ^. t, s; {' L3 G$ ]7 f7 M
其他默认
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. s5 M1 \( U& U. d, e$ K ` 点击菜单栏中Project->Setting修改堆的大小,堆设置为0x1000。
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2、main函数增加FASFS相关测试代码段。
! ?9 m# I' |, r4 `* ~ 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。$ U! s+ a7 K7 t% X6 M
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- ******************************************************************************: [' T- Q# {, m
- * @file : main.c9 v3 y U$ B6 M5 l
- * @brief : Main program body2 z* X7 a" m3 a$ O. C. f- j
- ******************************************************************************
" Z5 Z: T1 [" R0 X+ G+ F- B - * @attention
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4 s- M+ [+ x$ ^- L - * <h2><center>© Copyright (c) 2020 STMicroelectronics.( g( L& T- d6 T# J
- * All rights reserved.</center></h2>
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- * This software component is licensed by ST under Ultimate Liberty license2 j- W( Z2 j G9 W9 t0 j
- * SLA0044, the "License"; You may not use this file except in compliance with" `; G8 d" P/ {* N& v- x
- * the License. You may obtain a copy of the License at:& N' ]2 n Q) f2 ^ P6 O7 S7 ]
- * <a href="http://www.st.com/SLA0044" target="_blank">www.st.com/SLA0044</a>/ O' B( B+ m! X$ k+ l& @7 s
- *1 K1 ? i. z* X- s
- ******************************************************************************+ \' f& Q W; H: R+ M; L) C
- *// H1 \& X# ~, e- N. g8 L" ]* E D
- /* USER CODE END Header */1 E/ S/ x4 Z2 B/ X
# l. L6 [5 P3 X- /* Includes ------------------------------------------------------------------*/
/ @( G5 n3 |' |2 I6 I5 l5 ]/ L* H7 }4 Q - #include "main.h"
4 x! w1 o J1 m5 Q' d9 z - #include "dma.h"6 L( @ l% X& y4 N0 e( E1 F2 H
- #include "fatfs.h"$ B! M8 Z W' ]7 b/ F
- #include "sdmmc.h"
. q, \7 `5 Z, }6 ?2 G& v" |& X - #include "gpio.h", P4 y/ a% p7 I! O
- " e- }' g; k7 b: g7 k& I) s
- /* Private function prototypes -----------------------------------------------*/0 x! T5 Z& c% `7 `2 u
- void SystemClock_Config(void);# A7 q* _ c, S6 z$ |/ N# c9 r
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- HAL_SD_CardInfoTypeDef SDCardInfo; ) z, d! @+ {3 w1 z. s f8 Y. t
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- FRESULT ret_sd;4 w, `' A$ |: ? B4 w2 x
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- uint8_t rtext[100]; /* File read buffers */5 f3 j0 I" {# Y8 i3 y# q
- * k2 W' J4 j9 r
- /**; ~; T$ ?: x* i8 T) L8 j# L: A/ L
- * @brief The application entry point.
+ O3 r1 x) T' Y) P$ |% u# T, _8 { - * @retval int$ n1 I" z* O$ X0 O3 h0 B$ s3 |- b
- */) w6 H3 G) g4 v6 E4 L+ n9 b5 E& Z( x
- int main(void)
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$ D% J- W, q+ ~: R2 P- Z; D - /* USER CODE BEGIN PV */" J4 F$ N$ T6 J: t, l& d4 H
- /* Private variables ---------------------------------------------------------*/$ h3 B7 L% l7 j7 d+ _* {
- BYTE work[_MAX_SS];
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- FATFS fs; // Work area (file system object) for logical drive
" j8 w& S% [: }7 {" W" F - FIL file; // file objects F. O6 w9 d$ Q4 T5 V$ R1 X2 b
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- uint32_t byteswritten; /* File write counts */4 t: R6 c9 p# c6 F8 V
- uint32_t bytesread; /* File read counts */
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- uint8_t wtext[] = "STM32 working with FatFs Test"; /* File write buffer */
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# v* v5 o: m. x$ y9 J2 {8 N9 m - char filename[] = "STM32cube.txt";' x4 y0 u9 t$ v" A6 l# W5 h
- /* USER CODE END PV */: |* U" X' j4 Y- `& E; k. [
]0 S' }2 `' R c4 d! @8 M/ _- K- /* Enable I-Cache---------------------------------------------------------*/
) Y+ D( F' h! v8 b- R* O - SCB_EnableICache();
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- /* Enable D-Cache---------------------------------------------------------*/9 M9 V q7 @( b. n7 `1 C# O) L/ X
- SCB_EnableDCache();
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3 s+ x5 ^& q( M: f7 D- /* MCU Configuration--------------------------------------------------------*/
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- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */8 O* A" l7 u% T' A
- HAL_Init();- F( u+ b5 F0 ?3 B
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- /* Configure the system clock */
0 E4 ?" q4 i6 V' Z0 b - SystemClock_Config();' |; _1 J( T- d! ?& ~- P6 \- `7 x
6 p: I) i. M K- /* Initialize all configured peripherals */( h5 Q X5 X* A4 U
- MX_DMA_Init(); //开启DMA相关时钟、设置中断优先级/ X+ B3 L& l7 c* w+ Z8 i
- MX_SDMMC1_SD_Init(); //设置SD初始化变量,并未进行初始化
* v3 ~1 M/ P' b6 E# r7 B8 J! G+ I - 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- d4 V) e' {- Q5 K% ]
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- /*----------------------- 文件系统测试:挂载测试 -----------------------------*/
9 |8 }' Q* K3 ]0 E" Y - ret_sd = f_mount(&fs, "0:", 1); //挂载工作区
* U# e m" [# t& ^% F - /* 如果没有文件系统就格式化创建创建文件系统 */
' |& R4 h m* c5 [, v0 }5 H - if(ret_sd == FR_NO_FILESYSTEM), @1 L8 x2 W" P) t& O4 f
- {
# B# q$ r2 t5 v5 B+ c! Y/ F - /* 格式化 */; n: P8 Q' Y9 s( |& j$ l( @
- ret_sd=f_mkfs("0:", FM_FAT, 0, work, sizeof(work)); 6 t" j0 s" N' D7 `' v5 |9 y% |
-
8 i" n8 ]" Z. U% X% \ - if(ret_sd == FR_OK)
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- /* 格式化后,先取消挂载 */: t( L1 F0 B- R5 @6 ^
- ret_sd = f_mount(NULL,"0:",1); / ]9 ]0 V; m0 ` O, h0 d
- /* 重新挂载 */
2 S! t! ^# v. X8 I. b! b ^) Y; F; O( Y - ret_sd = f_mount(&fs,"0:",1);3 q/ h2 _* Z- ?- V
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- else$ H$ T" f- C. x+ u7 c& h4 Z
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- //格式化失败
2 u! ~( M* C- Q) S - while(1);
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2 r( I: L: H% P" | - else if(ret_sd!=FR_OK)
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- //SD卡挂载文件系统失败
! d8 r+ |$ h% J7 N; `% ] - //可能原因:SD卡初始化不成功
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- /*----------------------- 文件系统测试:写测试 -----------------------------*/
5 G4 z/ g' W. @6 q+ q4 w - /* 打开文件,如果文件不存在则创建它 */: P) y) c* y' h/ t% X! E9 L5 a0 ?
- ret_sd = f_open(&file, "STM32.txt", FA_CREATE_ALWAYS | FA_WRITE );- u- v2 V- v. G: }( O
- if ( ret_sd == FR_OK )
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( W/ {. k: \2 p9 Y9 z- L: S5 e - //打开/创建FatFs读写测试文件.txt文件成功,向文件写入数据。/ n. S9 x/ g1 M3 n- {. M
- /* 将指定存储区内容写入到文件内 */5 Y9 H. o1 {3 y/ {% f* i
- ret_sd=f_write(&file, wtext,sizeof(wtext),&byteswritten);: I1 ]2 v, P1 Q: m$ n& @ O0 ~
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- /* 不再读写,关闭文件 */
" `: U, |% p- C - f_close(&file);
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- /*------------------- 文件系统测试:读测试 ------------------------------------*/) H8 T4 j+ [* F& \1 D
- ret_sd = f_open(&file, "STM32.txt", FA_OPEN_EXISTING | FA_READ); / h/ u/ P8 q, {4 j* w3 _6 n8 N* z
- if(ret_sd == FR_OK)
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- //打开文件成功* a3 Q- G/ ?5 _1 P4 Z+ A; v" k. i
- ret_sd = f_read(&file, rtext, sizeof(rtext), &bytesread);
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' T3 h0 I$ h- r# d7 l- /* 不再读写,关闭文件 */
4 E+ {- t5 c+ P- D0 l+ { - f_close(&file); # i# I) C% e# ]; p
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- /* 不再使用文件系统,取消挂载文件系统 */) J* ? L/ V4 b% w% W8 s, k
- f_mount(NULL,"0:",1);( r( }4 u; F" E. B
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8 y1 j+ c9 x# p3 o - HAL_SD_GetCardInfo(&hsd1, &SDCardInfo);
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- while (1)2 H) T$ @/ W& F1 D! p
- {
0 B6 ?0 }& ^9 G) G* T8 O - /* USER CODE END WHILE */
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( a, Q5 L) g! z2 ]! X8 e0 @- /* USER CODE BEGIN 3 */
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' o! j5 W* K% X' r - /* USER CODE END 3 */
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复制代码
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