STM32F7+STM32CubeMX5.21+SD+FATFS
& T' m. ?) _) }. X0 S/ e* j1、STM32CubeMX配置
8 A1 E( V. ^: J1 U9 ?# b) `! _时钟配置- `9 {% [8 n* U9 [- i* {
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$ L! n. L) I! Z H, n" }0 xSDMMC配置5 o5 j) v( t" @) J+ _+ s8 L1 m
Connectivity->SDMMC14 u! d, D9 Y& d- r" p, K
MODE选择: SD 4 bits Wide bus- ?- y' d! }: x1 I; c
NVIC Setting
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" S5 f2 y5 ]$ {+ c" R6 q DMA Setting设置DMA读写。
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修改CDMMC传输时钟分频。& R/ P3 _1 }# m; d# T
/* SDMMC Data Transfer Frequency (25MHz max) */
) ~1 d/ x$ l/ K* ]) A, X. @* O$ W2 I APB2=108MHZ, 108/6=18MHZ。频率过高读写SD卡是会出现FR_DISK_ERR错误。 b$ T/ s0 \2 G) x' p
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`1 K$ p9 s) `- _3 {9 b2 @ g 其他默认
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FATFS配置1 x2 {- {0 p' {: Q z/ J- q: T
Middleware->FATFS
" r9 I$ `9 D: I8 ?+ S$ l 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 h. @. P; B! X8 ?" w( A$ [ Set->Defines修改两项
: |# N0 d: T( P 其他默认
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6 I# g# Y( {( O 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。
- Z; R& _4 `* r ^* V' k 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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- /**
2 j( @# h& `- ? - ******************************************************************************; s" f: e$ N- t- ?" s) w
- * @file : main.c
8 Y8 L3 B3 |, t, P2 p4 n" L - * @brief : Main program body8 C/ y' \% ^1 }4 S
- ******************************************************************************/ U4 K5 O% W X" H2 U i0 ?; M
- * @attention
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- * <h2><center>© Copyright (c) 2020 STMicroelectronics.
& q/ J4 r' v2 Q- Z" h @ - * All rights reserved.</center></h2>
- `9 }& n5 {8 R; W. C$ P - *
, m" Q5 M* |$ x, J0 a7 o8 h - * This software component is licensed by ST under Ultimate Liberty license
. E; ~5 S) f- W2 P - * SLA0044, the "License"; You may not use this file except in compliance with% Q, n+ Q6 t. E2 f7 r M
- * the License. You may obtain a copy of the License at:
2 u9 t) O# ~: o; m! K. a& t - * <a href="http://www.st.com/SLA0044" target="_blank">www.st.com/SLA0044</a>
; i, h% ?1 t. B. G - *
9 Y4 G- s9 b& T& {5 v+ x5 n5 Q - ******************************************************************************- P/ D, N7 S2 Z. _! o
- */# Q+ o0 K" G' C/ {* p9 p/ J
- /* USER CODE END Header */& ]/ J$ S& T6 o# u
- 2 { v- Y! c; _( z3 C, W
- /* Includes ------------------------------------------------------------------*/# J9 b6 H, l# x
- #include "main.h"
( a. o# E% z) w; Y4 b% `+ u - #include "dma.h"
+ e$ V- J+ t9 s I - #include "fatfs.h"2 m+ c' M& X) l! c
- #include "sdmmc.h"
' V. {3 h; p/ d/ l- d* r+ q - #include "gpio.h"
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' R3 L7 |( v. P3 j, L- /* Private function prototypes -----------------------------------------------*/8 ]0 O3 f# w9 s% ]7 A
- void SystemClock_Config(void);5 K& _0 Z/ T8 F: r4 O
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- HAL_SD_CardInfoTypeDef SDCardInfo;
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- FRESULT ret_sd;
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6 F+ @6 \6 y5 j) P- uint8_t rtext[100]; /* File read buffers */
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- /**
+ [/ r \, F, c" Z; U' K9 t) v$ b - * @brief The application entry point.
$ b' u ^" C3 J - * @retval int
- G6 [- X, r6 w: _8 K - */$ n4 o* I9 X; i+ c' L+ h, T
- int main(void)
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- /* USER CODE BEGIN PV */6 c9 n/ Q+ D7 m
- /* Private variables ---------------------------------------------------------*/
$ u' Z$ x3 R6 @ e - BYTE work[_MAX_SS];0 G$ Q+ l6 ]6 g! j+ r1 o. ^: W
-
; {& \( I4 R$ x/ L( `4 i2 |6 o* t8 L - FATFS fs; // Work area (file system object) for logical drive
+ p6 ]% ^4 }* M - FIL file; // file objects
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- uint32_t byteswritten; /* File write counts */& ^9 w7 E2 j( `
- uint32_t bytesread; /* File read counts */) ?2 N8 z2 l& O" g+ n7 {
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- uint8_t wtext[] = "STM32 working with FatFs Test"; /* File write buffer */
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- char filename[] = "STM32cube.txt";; k* k9 J7 a0 ^" J& v9 l
- /* USER CODE END PV */
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- /* Enable I-Cache---------------------------------------------------------*/
# _; A& L! d2 H- F. r - SCB_EnableICache();9 F7 Y ]: w; d
% F8 z% F& _% O7 c3 g. z) G- r: {- /* Enable D-Cache---------------------------------------------------------*/! n' y8 Q5 F" c9 A
- SCB_EnableDCache();1 K+ B7 G2 \4 }( ?9 r( L, W
7 J6 r) G5 R* i/ r- /* MCU Configuration--------------------------------------------------------*/
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- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
. B) n, R J$ w& d6 I - HAL_Init();. `6 J* u& G9 S
: _; g# ]5 Q' c) [9 |& W- /* Configure the system clock */# V4 [1 k! f, S7 l2 S' f6 c! f& ?7 J
- SystemClock_Config();6 @9 }2 \) ?: \: }6 a
8 g9 K5 v8 o+ Z- m* k4 y2 ]) |- /* Initialize all configured peripherals */& r' V, E0 ^3 R6 N
- MX_DMA_Init(); //开启DMA相关时钟、设置中断优先级
! [$ f/ ?6 D P! v# Y7 P - MX_SDMMC1_SD_Init(); //设置SD初始化变量,并未进行初始化
. L* b, m5 L& a0 P - 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 -----------------------------*/1 s% g3 H1 `4 Z8 o
- ret_sd = f_mount(&fs, "0:", 1); //挂载工作区6 |1 }: F& C( |1 E) M. O
- /* 如果没有文件系统就格式化创建创建文件系统 */6 v) `9 b" h# a" R8 Y
- if(ret_sd == FR_NO_FILESYSTEM)
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! _( f- e8 ~, H - /* 格式化 */' t5 V, Z- c8 H0 L+ e* l$ d9 B
- ret_sd=f_mkfs("0:", FM_FAT, 0, work, sizeof(work)); 4 a1 U; o9 f4 L
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- if(ret_sd == FR_OK)
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7 l$ }3 `6 E ] - /* 格式化后,先取消挂载 *// t, G( m; Z6 Y6 N. N2 h( J- U
- ret_sd = f_mount(NULL,"0:",1);
- C: v- p, {+ Q - /* 重新挂载 */ " c; L# b6 r/ O) r: }5 h# `+ Y
- ret_sd = f_mount(&fs,"0:",1);1 ^0 T+ t: h0 w0 y, N
- }
& O- d4 H+ G }8 }0 g; ? - else
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9 G" m+ y1 H! S$ Y - //格式化失败
% S4 v2 _. \7 L$ } - while(1);
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/ x3 a$ C8 L% _" _/ J; C M - else if(ret_sd!=FR_OK)$ ~, h M5 r" k2 e6 D# p
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- //SD卡挂载文件系统失败
/ f' l+ y. y9 H - //可能原因:SD卡初始化不成功1 `# l& }# e1 i8 f( e5 ~" I) I6 }
- while(1);
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- /*----------------------- 文件系统测试:写测试 -----------------------------*/5 ]( Z: w, b0 W% b
- /* 打开文件,如果文件不存在则创建它 */) M3 [# \9 ^( x3 S9 Q
- ret_sd = f_open(&file, "STM32.txt", FA_CREATE_ALWAYS | FA_WRITE );
- P# D1 z. ]/ k ]- a - if ( ret_sd == FR_OK )
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- //打开/创建FatFs读写测试文件.txt文件成功,向文件写入数据。/# [: e% s0 _+ {& h
- /* 将指定存储区内容写入到文件内 */
& x4 x& c9 X7 t1 x - ret_sd=f_write(&file, wtext,sizeof(wtext),&byteswritten);/ o) B' ~: M% F) Y" u2 d9 l" ^
9 i. ^9 w( F W3 f3 f4 p% g7 O- /* 不再读写,关闭文件 *// O9 c7 \1 `( ~4 r/ j( M* ?
- f_close(&file);
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; @/ @3 A6 T/ r" r8 c7 N& Y - /*------------------- 文件系统测试:读测试 ------------------------------------*/0 m' }& r* _( S
- ret_sd = f_open(&file, "STM32.txt", FA_OPEN_EXISTING | FA_READ);
; P d. P: A& Q( C/ v! p - if(ret_sd == FR_OK)$ m0 }9 U' W! d+ T
- {
8 V2 k I* I2 X @ - //打开文件成功( L. C$ d9 E. {- f& C' H
- ret_sd = f_read(&file, rtext, sizeof(rtext), &bytesread); " C2 E; C# {5 Q- ?0 k- Y, z/ K6 o
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- /* 不再读写,关闭文件 */% g! `* o0 H' ?
- f_close(&file); # o& R! h/ \) O8 c% ?" x2 J9 e
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- /* 不再使用文件系统,取消挂载文件系统 */9 d0 ?' }( \+ A) { s% M# C6 T
- f_mount(NULL,"0:",1);$ I% X$ P" y |2 `3 H6 r
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+ m% |7 d2 E7 ^ - HAL_SD_GetCardInfo(&hsd1, &SDCardInfo);. z( @+ |# A" ~; y4 |7 c
1 n8 {% }! k2 E& `/ `. j3 x/ P- while (1)
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' ^, |' e# ]6 P& y* L2 \; | - /* USER CODE END WHILE */: I4 Z _( s7 }& H
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- /* USER CODE BEGIN 3 */
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. G6 t/ X6 W2 {. @# c c9 f& `; E - /* USER CODE END 3 */
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复制代码
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