fix interfaccia

tools/rb_test.c

@@ -0,0 +1,30 @@
+#include <stdint.h>
+#include <stdio.h>
+
+#define NET_PACKET_RINGBUF_SIZE		(256)
+#define NET_PACKET_RINGBUF_SIZE_MASK        (NET_PACKET_RINGBUF_SIZE - 1)
+#define FILTER_SIZE	(16)
+
+uint16_t i, j, rb_index, sample_index;
+uint16_t ringbuf[NET_PACKET_RINGBUF_SIZE];
+
+
+int main(void){
+	i = 0;
+	j = 512;
+	while(i < NET_PACKET_RINGBUF_SIZE){
+		ringbuf[i] = i;
+		i++;
+	}
+
+	while(j){
+		i = 0;
+		while(i < FILTER_SIZE){
+			rb_index  = (sample_index - i) & NET_PACKET_RINGBUF_SIZE_MASK;
+			printf("sample\t%ld\trb_idx\t%d\trb_val\t%d\n", sample_index, rb_index, ringbuf[rb_index]);
+			i++;
+		}
+		sample_index++;
+		j--;
+	}
+}