Akifumi Takahashi / Mbed OS eth-filesystem-sample

This program is published for a question I throw at the forum (https://os.mbed.com/questions/80658/HardFault-occurs-when-fopen-is-called-af/). I will thank you for answering my question. Abstract: LPC1768 freezes while processing this program, especially when fopen() is called after EthernetInterface.connect() P.S.' This problem is discussed here: https://github.com/ARMmbed/mbed-os/issues/6578

P.S.' This problem is discussed here: https://github.com/ARMmbed/mbed-os/issues/6578

Diff: main.cpp

Revision:
0:a1a5934e82aa
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Mar 22 20:18:38 2018 +0000
@@ -0,0 +1,31 @@
+#include "mbed.h"
+#include "EthernetInterface.h"
+
+LocalFileSystem local("local");
+void func();
+EthernetInterface *net;
+
+int main()
+{
+    func();
+    net = new EthernetInterface();
+    func();
+    if(net->connect()) {
+        printf("Error!@EthernetInterface::connect()\r\n");
+    } else {
+        printf("IP Address is %s\r\n", net->get_ip_address());
+    }
+    func();
+}
+
+
+void func()
+{
+    static int i = 1;
+    printf("-------test of fopen()#%d----\r\n", i);
+    if(fopen("/local/test.txt", "r")==NULL)
+        printf("File could not open\r\n");
+    else
+        printf("File was opened successfully.\r\n");
+    i++;
+}