Fix out of bounds access + add debug msg

src/service.rs

@@ -8,6 +8,8 @@ use service_specific::*;
 use shared::config::{Config, COMMAND_COUNT, COMMAND_PAUSE};
 
 fn main() -> Result<()> {
+    println!("startup macroboard service");
+
     // azdelivery usart device
     // let usb_device = UsbId {
     //     vendor_id: 0x0403,
@@ -37,6 +39,8 @@ fn main() -> Result<()> {
     let mut button_infos = [Duration::default(); COMMAND_COUNT];
     let start_time = Instant::now();
 
+    println!("service is now listening ...");
+
     // loop forever
     loop {
         // handle incoming message
@@ -77,8 +81,8 @@ fn execute_button_press(
     }
 
     // check that this commands last execution is longer than COMMAND_PAUSE ago
-    if (button_infos[button_id] + COMMAND_PAUSE) < time {
+    if (button_infos[button_id - 1] + COMMAND_PAUSE) < time {
-        button_infos[button_id] = time;
+        button_infos[button_id - 1] = time;
     } else {
         return Ok(());
     }

src/service_specific/port.rs

@@ -32,6 +32,8 @@ impl Port {
     pub fn open(usb_device: UsbId, settings: SerialPortSettings) -> Result<Self> {
         let port_path = Self::loop_usb_devices(usb_device)?;
 
+        println!("found device at path {}", port_path);
+
         let port = serialport::new(port_path, settings.baud_rate)
             .data_bits(settings.data_bits)
             .parity(settings.parity)
@@ -72,6 +74,11 @@ impl Port {
                 return Ok(device);
             }
 
+            println!(
+                "no device found with {}:{}",
+                usb_device.vendor_id, usb_device.product_id
+            );
+
             std::thread::sleep(Duration::from_secs(2));
         }
     }