Diff: main.cpp

Revision:

2:1c1602268656

Parent:

1:d65338ce2e7c

Child:

3:1e51c10aa4f2

diff -r d65338ce2e7c -r 1c1602268656 main.cpp
--- a/main.cpp	Wed Aug 23 03:11:41 2017 +0000
+++ b/main.cpp	Thu May 03 10:36:22 2018 +0000
@@ -1,40 +1,57 @@
 #include "mbed.h"
 #include "SDFileSystem.h"
 
-// mosi, miso, sclk, name
-SDFileSystem sd(PB_15, PB_14, PB_13, PA_9, "sd"); 
+// 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
     {
-        printf("open error!!\r\n");
+        pc.printf("open error!!\r\n");
         return 1;
     }
-    printf("file opened for read\r\n");
+    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
     {    
-        printf("read '%s'\r\n", buf);
+        pc.printf("%s", buf);
     }
     fclose(fp);  //关闭文件，释放资源
     
-    //printf("card type is 0x%x\r\n" , sd.card_type());
-    
-    // 写文件例子
-    FILE *fp2 = fopen("/sd/write.txt", "w");
-    if (fp2 == NULL)
-    {
-        printf("open error2!!\r\n");
-        return 1;
-    }
-    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
+    //pc.printf("card type is 0x%x\r\n" , sd.card_type());
 
     return 0;
 }