--- a/me8100_test_dio/rtest.c	Wed Jan 16 15:54:58 2002 +0100
+++ b/me8100_test_dio/rtest.c	Wed Jan 16 20:29:27 2002 +0100
@@ -30,7 +30,7 @@
   unsigned short value_a;
 
   printf("Read test, PID: %d\n", getpid());
-  file_handle = open("/dev/me8100_0", O_RDWR, 0);
+  file_handle = open("/dev/me8100_0", O_RDONLY, 0);
 
   if(file_handle < 0){
     printf("Cannot open path !\n");