diff --git a/app/Makefile b/app/Makefile
new file mode 100644
index 0000000..f56abc6
--- /dev/null
+++ b/app/Makefile
@@ -0,0 +1,15 @@
+#/*********************************************
+# * Benjamin Krill <ben@codiert.org>
+# *********************************************/
+CFLAGS= -c -I../libfpga
+
+CC = gcc
+
+SRCS = fifo_shift.c
+OBJS = $(SRCS:%.c=%.o)
+
+fifo_shift: ${OBJS}
+	${CC} $^ -o $@ -lfpga 
+
+clean:
+	rm *.o *.so.*
diff --git a/app/fifo_shift.c b/app/fifo_shift.c
new file mode 100644
index 0000000..d53bd1d
--- /dev/null
+++ b/app/fifo_shift.c
@@ -0,0 +1,46 @@
+/*********************************************
+ * Benjamin Krill <ben@codiert.org>
+ *********************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <libfpga.h>
+
+int
+main(int argv, char **argc)
+{
+	int fd, sta, rnd, i;
+	char *c, buf[4];
+
+	if ((fd = open("tdat", O_RDONLY, 0)) == -1 ) {
+		printf("ERROR-1: %s\n", strerror(errno));
+		return -1;
+	}
+
+	if (fpgafs_create_context(fd, "dbg") == -1) {
+		printf("ERROR-2: Cannot create fpgafs context\n");
+		close(fd);
+		return -1;
+	}
+
+//	while (fpgafs_get_stat() < 0x10) {
+	for(i=0; i < 10; i++) {
+		rnd = rand();
+		c = (char *)&rnd;
+		printf("write data: %x\n",c[0], c[1], c[2], c[3]);
+		if ((sta=fpgafs_send_data(&c[0], 4)) != 4) {
+			printf("ERROR-3: Cannot send specified length (%d)\n", sta);
+			return -1;
+		}
+
+		if ((sta=fpgafs_recv_data(&c[0], 4)) != 4) {
+			printf("ERROR-3: Cannot send specified length (%d)\n", sta);
+			return -1;
+		}
+		printf("read data: %x\n",buf[0], buf[1], buf[2], buf[3]);
+	}
+	return 0;
+}
diff --git a/libfpga/Makefile b/libfpga/Makefile
index 7515edc..6984733 100644
--- a/libfpga/Makefile
+++ b/libfpga/Makefile
@@ -1,4 +1,6 @@
-
+#/*********************************************
+# * Benjamin Krill <ben@codiert.org>
+# *********************************************/
 CFLAGS=-c -fPIC
 
 CC = gcc
diff --git a/libfpga/libfpga.h b/libfpga/libfpga.h
index 9fbbea0..1a81bb5 100644
--- a/libfpga/libfpga.h
+++ b/libfpga/libfpga.h
@@ -1,9 +1,9 @@
 /*********************************************
  * Benjamin Krill <ben@codiert.org>
  *********************************************/
-int fpgafs_create_context(int fd, const char *name)
-int fpgafs_send_data(const void *buf, size_t count);
-int fpgafs_recv_data(void *buf, size_t count);
+int fpgafs_create_context(int fd, const char *name);
+int fpgafs_send_data(const void *buf, int count);
+int fpgafs_recv_data(void *buf, int count);
 int fpgafs_send_cmd(unsigned int cmd);
 int fpgafs_get_stat();
 int fpgafs_set_lldrv(const char* name);