Update timing parameters and clear up some comments

src/main.rs

@@ -5,10 +5,12 @@ use profirust::phy;
 mod tester_io;
 mod valve_terminal;
 
-// Bus Parameters
-const MASTER_ADDRESS: u8 = 1;
+// Muss auf den passenden USB-RS485 Port abgeändert werden!
 const BUS_DEVICE: &'static str = "/dev/ttyUSB0";
-const BAUDRATE: profirust::Baudrate = profirust::Baudrate::B19200;
+
+// Bus Parameters
+const MASTER_ADDRESS: u8 = 3;
+const BAUDRATE: profirust::Baudrate = profirust::Baudrate::B500000;
 
 fn main() -> ! {
     env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info"))
@@ -23,19 +25,18 @@ fn main() -> ! {
     let mut tester_io = tester_io::TesterIo::new(&mut dp_master, BAUDRATE);
     let mut valve_terminal = valve_terminal::ValveTerminal::new(&mut dp_master, BAUDRATE);
 
+    // Bus-Parameter für USB-RS485 Converter sind hier beschrieben: https://docs.rs/profirust/latest/profirust/phy/struct.SerialPortPhy.html
     let mut fdl = fdl::FdlActiveStation::new(
         fdl::ParametersBuilder::new(MASTER_ADDRESS, BAUDRATE)
-            // We use a rather large T_slot time because USB-RS485 converters
-            // can induce large delays at times.
-            .slot_bits(960)
+            .slot_bits(4000)
+            .max_retry_limit(3)
             // 2 Sekunden Watchdog Timeout
             .watchdog_timeout(profirust::time::Duration::from_secs(2))
             .build_verified(&dp_master),
     );
-    // We must not poll() too often or to little. T_slot / 2 seems to be a good compromise.
-    let sleep_time: std::time::Duration = (fdl.parameters().slot_time() / 2).into();
+    let sleep_time = std::time::Duration::from_micros(3500);
 
-    log::info!("Verbindung mit dem Bus wird aufgebaut...");
+    log::info!("Verbindung mit dem Bus {BUS_DEVICE:?} wird aufgebaut...");
     let mut phy = phy::SerialPortPhy::new(BUS_DEVICE, fdl.parameters().baudrate);
 
     fdl.set_online();