Add files via upload

syscalls/syscalls.c

@@ -0,0 +1,113 @@
+/**************************************************************************//*****
+ * @file     stdio.c
+ * @brief    Implementation of newlib syscall
+ ********************************************************************************/
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#undef errno
+extern int errno;
+extern int  _end;
+
+/*This function is used for handle heap option*/
+__attribute__ ((used))
+caddr_t _sbrk ( int incr )
+{
+    static unsigned char *heap = NULL;
+    unsigned char *prev_heap;
+
+    if (heap == NULL) {
+        heap = (unsigned char *)&_end;
+    }
+    prev_heap = heap;
+
+    heap += incr;
+
+    return (caddr_t) prev_heap;
+}
+
+__attribute__ ((used))
+int link(char *old, char *new)
+{
+    return -1;
+}
+
+__attribute__ ((used))
+int _close(int file)
+{
+    return -1;
+}
+
+__attribute__ ((used))
+int _fstat(int file, struct stat *st)
+{
+    st->st_mode = S_IFCHR;
+    return 0;
+}
+
+__attribute__ ((used))
+int _isatty(int file)
+{
+    return 1;
+}
+
+__attribute__ ((used))
+int _lseek(int file, int ptr, int dir)
+{
+    return 0;
+}
+
+/*Low layer read(input) function*/
+__attribute__ ((used))
+int _read(int file, char *ptr, int len)
+{
+
+#if 0
+     //user code example
+     int i;
+     (void)file;
+
+     for(i = 0; i < len; i++)
+     {
+        // UART_GetChar is user's basic input function
+        *ptr++ = UART_GetChar();
+     }
+
+#endif
+
+    return len;
+}
+
+
+/*Low layer write(output) function*/
+__attribute__ ((used))
+int _write(int file, char *ptr, int len)
+{
+
+#if 0
+     //user code example
+
+     int i;
+     (void)file;
+
+     for(i = 0; i < len; i++)
+     {
+        // UART_PutChar is user's basic output function
+        UART_PutChar(*ptr++);
+     }
+#endif
+
+    return len;
+}
+
+__attribute__ ((used))
+void abort(void)
+{
+    /* Abort called */
+    while(1);
+}
+
+/* --------------------------------- End Of File ------------------------------ */