Add quiet/high speed mode

Author: varesa

dim.py

@@ -12,6 +12,7 @@
     0b00000001,
 ]
 
+sys.stdout.buffer.write(b'.q.c.s')
 while True:
     for pattern in patterns:
         #sys.stdout.buffer.write(b'.c')

src/main.rs

@@ -21,6 +21,7 @@ const HELP_MESSAGE: &str = "
 .s - strobe active row\r
 .c - clear active row\r
 .i - toggle instant strobe\r
+.q - set quiet (high speed) mode\r
 \r
 anything else will be interpreted as data to active row\r
 use '..' to enter a literal '.'-byte as data\r
@@ -80,6 +81,7 @@ fn main() -> ! {
     const CLEAR: u8 = 'c' as u8;
     const HELP: u8 = 'h' as u8;
     const INSTANT: u8 = 'i' as u8;
+    const QUIET: u8 = 'q' as u8;
 
     let mut command_mode = false;
     let mut active_row = Row0;
@@ -139,6 +141,10 @@ fn main() -> ! {
                             }
                             command_mode = false;
                         },
+                        (true, QUIET, _) => {
+                            usb_serial.set_quiet(true);
+                            command_mode = false;
+                        },
                         (true, _, _) => {
                             usb_serial.write_str("Invalid command character\r\n");
                             command_mode = false;

src/usb.rs

@@ -48,6 +48,7 @@ impl UsbBus {
 pub struct UsbSerial<'a> {
     dev: UsbDevice<'a, usb::UsbBus<usb::Peripheral>>,
     serial: SerialPort<'a, usb::UsbBus<usb::Peripheral>>,
+    quiet_mode: bool,
 }
 
 impl<'a> UsbSerial<'a> {
@@ -67,6 +68,7 @@ impl<'a> UsbSerial<'a> {
         UsbSerial {
             dev: usb_dev,
             serial: usb_serial,
+            quiet_mode: false,
         }
     }
 
@@ -80,13 +82,16 @@ impl<'a> UsbSerial<'a> {
     }
 
     pub fn write(&mut self, buf: &[u8]) -> usize {
-        loop {
-            let result = self.serial.write(buf);
-            if let Ok(count) = result {
-                return count;
+        if self.quiet_mode {
+            return buf.len();
+        } else {
+            loop {
+                let result = self.serial.write(buf);
+                if let Ok(count) = result {
+                    return count;
+                }
             }
         }
-
     }
 
     pub fn write_str(&mut self, message: &str) -> usize {
@@ -108,5 +113,9 @@ impl<'a> UsbSerial<'a> {
         return bytes_written
 
     }
+
+    pub fn set_quiet(&mut self, quiet_mode: bool) {
+        self.quiet_mode = quiet_mode;
+    }
 }