add digital read

benches/b15f.rs

@@ -11,4 +11,18 @@ mod tests {
 	fn bench_create_instance(b: &mut Bencher) {
 		b.iter(|| B15F::new());
 	}
+
+	#[bench]
+	fn bench_digital_write(b: &mut Bencher) {
+		let mut drv = B15F::new().unwrap();
+		
+		b.iter(move || drv.digital_write::<0>(0xAB).unwrap());
+	}
+
+	#[bench]
+	fn bench_digital_read(b: &mut Bencher) {
+		let mut drv = B15F::new().unwrap();
+
+		b.iter(move || drv.digital_read::<0>().unwrap());
+	}
 }