[零基础学习STM32]第十四讲:FATFS实验—文件操作 -

<font color="#444444"><font face="Tahoma">/*
* --------------------
* Company : LUOYANG GINGKO TECHNOLOGY CO.,LTD.
: 洛阳银杏科技有限公司
* --------------------
* Project Name : iCore3 fatfs_sd
* Description : iCore3 fatfs_sd
* --------------------
* Tool Versions : uVision V5.17.0.0
* Target Device : STM32F407IGT6
* --------------------
* Engineer : ysloveivy.
* Revision : 0.01
* Created Date : 2015.12.02
* --------------------
* Engineer :
* Revision :
* Modified Date :
* --------------------
* Additional Comments :
*
* --------------------
*/
//--------------------------- Include ---------------------------//
#include "..\include\led.h"
#include "..\include\main.h"
#include "..\include\usart.h"
#include "..\fatfs\ff.h"
#include "..\fatfs\diskio.h"
#include "..\include\stm324xg_eval_sdio_sd.h"
#include "..\fwlib\inc\stm32f4xx_gpio.h"
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
//---------------------------- Define ---------------------------//
//-------------------------- Variable ---------------------------//
//--------------------- Function Prototype ----------------------//
//--------------------------- Function --------------------------//
/*
* Name : main
* Description : ---
* Author : ysloveivy.
*
* History
* --------------------
* Rev : 0.00
* Date : 12/02/2015
*
* create.
* --------------------
*/
int main(void)
{
int i,j;
FIL file; //文件对象
FATFS fatfs; //逻辑驱动器的工作区
static FRESULT res; //FRESULT函数公共结果代码
unsigned char write_buffer[512]; //写文件缓冲区
unsigned char read_buffer[512]; //读文件缓冲区
unsigned int counter;
led.initialize();
usart4.initialize(115200);
usart4.printf("\x0c");
usart4.printf("\033[1;32;40m");
usart4.printf("\r\n\r\nhello! I am iCore3!\r\n\r\n\r\n");
//判断SD卡是否初始化
if(SD_Init() != 0){
usart4.printf("SD ERROR!\r\n");
while(1){
for(i = 0;i < 10000000;i++);
LED_RED_ON;
for(i = 0;i < 10000000;i++);
LED_RED_OFF;
}
}else{
usart4.printf("SD Initialize successful!\r\n");
}
for(i = 0;i < 1000000;i++);
res = f_mount(&fatfs,"0:",1); //挂载SD卡
if(res != RES_OK){
usart4.printf("f_mount error!\r\n");
while(1){
for(i = 0;i < 10000000;i++);
LED_RED_ON;
for(i = 0;i < 10000000;i++);
LED_RED_OFF;
}
}else{
usart4.printf("f_mount successful!\r\n");
}
res = f_open(&file,"0:/test.txt",FA_READ | FA_WRITE | FA_OPEN_ALWAYS);
//打开驱动器0上的源文件
if(res != RES_OK){
usart4.printf("f_open error!\r\n");
while(1){
for(i = 0;i < 10000000;i++);
LED_RED_ON;
for(i = 0;i < 10000000;i++);
LED_RED_OFF;
}
}else{
usart4.printf("f_open successful!\r\n");
}
res = f_lseek(&file,0); //移动写指针到文件首
if(res != RES_OK){
usart4.printf("f_lseek error!\r\n");
while(1){
for(i = 0;i < 10000000;i++);
LED_RED_ON;
for(i = 0;i < 10000000;i++);
LED_RED_OFF;
}
}else{
usart4.printf("f_lseek successful!\r\n");
}
for(i = 0;i < 512;i++){
write_buffer[i] = i % 256;
}
res = f_write(&file,write_buffer,512,&counter); //将缓冲器中的内容写入源文件
if(res != RES_OK || counter != 512){
usart4.printf("f_write error!\r\n");
while(1){
for(i = 0;i < 10000000;i++);
LED_RED_ON;
for(i = 0;i < 10000000;i++);
LED_RED_OFF;
}
}else{
usart4.printf("f_write successful!\r\n");
}
res = f_lseek(&file,0); //移动读指针到文件首
if(res != RES_OK){
usart4.printf("f_lseek error!\r\n");
while(1){
for(i = 0;i < 10000000;i++);
LED_RED_ON;
for(i = 0;i < 10000000;i++);
LED_RED_OFF;
}
}else{
usart4.printf("f_lseek successful!\r\n");
}
res = f_read(&file,read_buffer,512,&counter);
if(res != RES_OK || counter != 512){
usart4.printf("f_read error!\r\n");
while(1){
for(i = 0;i < 10000000;i++);
LED_RED_ON;
for(i = 0;i < 10000000;i++);
LED_RED_OFF;
}
}else{
usart4.printf("f_read successful!\r\n");
}
f_close(&file); //关闭源文件
usart4.printf("read data:\r\n");
for(i = 0;i < 32;i++){
for(j = 0; j < 16; j ++)
usart4.printf(" %02X",read_buffer[i*16+j]);
usart4.printf("\r\n");
}
while(1){
for(i = 0;i < 10000000;i++);
LED_GREEN_ON;
for(i = 0;i < 10000000;i++);
LED_GREEN_OFF;
}</font></font>

复制代码

文件名	功能	说明
ffconf.h	FATFS模块配置文件	需要根据需求来配置参数
ff.h	FATFS和应用模块公用的包含文件	不需要修改
ff.c	FATFS模块源码	不需要修改
diskio.h	FATFS和disk I/O模块公用的包含文件	不需要修改
diskio.c	FATFS和disk I/O模块接口层文件	与平台相关的代码，需要用户根据存储介质来编写函数
interger.h	数据类型定义	与编译器有关