Added more modularity and config.

src/motors.rs

@@ -0,0 +1,29 @@
+use rppal::gpio::OutputPin;
+use rppal::pwm::Pwm;
+
+pub struct Motor {
+    pub in1: OutputPin,
+    pub in2: OutputPin,
+    pub pwm: Pwm,
+}
+
+
+impl Motor {
+    pub fn forward(&mut self, speed: f64) {
+        self.in1.set_high();
+        self.in2.set_low();
+        self.pwm.set_duty_cycle(speed).unwrap();
+    }
+
+    pub fn backward(&mut self, speed: f64) {
+        self.in1.set_low();
+        self.in2.set_high();
+        self.pwm.set_duty_cycle(speed).unwrap();
+    }
+
+    pub fn stop(&mut self) {
+        self.in1.set_low();
+        self.in2.set_low();
+        self.pwm.set_duty_cycle(0.0).unwrap();
+    }
+}