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dsfa
Dependencies: dsf SDFileSystem TextLCD mbed stepper_moter
Fork of my_example_Nucleo_Ex05_SD_zhangyuxiang2 by
main.cpp
- Committer:
- brainliang
- Date:
- 2018-05-03
- Revision:
- 2:1c1602268656
- Parent:
- 1:d65338ce2e7c
- Child:
- 3:1e51c10aa4f2
File content as of revision 2:1c1602268656:
#include "mbed.h" #include "SDFileSystem.h" // mosi, miso, sclk, name 用SPI端口 //SDFileSystem sd(PB_15, PB_14, PB_13, PA_9, "sd"); //Serial pc(PA_2, PA_3); SDFileSystem sd(PA_7, PA_6, PA_5, PA_15, "sd"); //教学板上的管脚 Serial pc(PA_9, PA_10); //教学板上与电脑通讯的串口 int main() { DirHandle *dh = opendir("/sd/"); //读取SD卡中的文件列表 if(!dh){ pc.printf("opendir error\n"); return 1; } dirent *entry; for(;;){ entry = dh->readdir(); if(!entry) break; pc.printf("%s\r\n", entry->d_name); } dh->closedir(); // 写文件例子 FILE *fp2 = fopen("/sd/write.txt", "w"); if (fp2 == NULL) { pc.printf("open error2!!\r\n"); return 1; } pc.printf("file opened for write\r\n"); fprintf(fp2, "hello\r\n"); fprintf(fp2, "%d", 23333); fclose(fp2); //写完文件要记得关闭,不然可能没保存上 // 读文件例子 FILE *fp = fopen("/sd/test.txt", "r"); //打开文件,路径以“/sd/”开头 if (fp == NULL) //打开失败,原因可能是文件不存在,或卡没有连接好 { pc.printf("open error!!\r\n"); return 1; } pc.printf("file opened for read\r\n"); char buf[64]; while (fgets(buf, sizeof(buf), fp) != NULL) //读入一行的C函数 { pc.printf("%s", buf); } fclose(fp); //关闭文件,释放资源 //pc.printf("card type is 0x%x\r\n" , sd.card_type()); return 0; }