add: scramble

orangepunk-hardware/src/main.rs

@@ -34,7 +34,7 @@ fn main() -> ! {
         arduino_hal::hal::usart::BaudrateArduinoExt::into_baudrate(57600),
     );
 
-    ufmt::uwriteln!(&mut serial, "Hello from Arduino!\r").unwrap_infallible();
+    write_str(&mut serial, "SECSYS v558");
 
     let mut i = 0;
     loop {
@@ -131,6 +131,66 @@ trait Writer<C: Copy> {
 impl<USART, RX, TX> Writer<u8> for Usart<USART, RX, TX>
 where USART: arduino_hal::usart::UsartOps<Atmega, RX, TX> {
     fn write_byte(&mut self, b: u8) {
-        Usart::write_byte(self, b);
+        Usart::write_byte(self, scramble(b));
+    }
+}
+
+fn scramble(c: u8) -> u8 {
+    match c {
+    b'a' => b'g',
+    b'b' => b'h',
+    b'c' => b'i',
+    b'd' => b'j',
+    b'e' => b'k',
+    b'f' => b'l',
+    b'g' => b'm',
+    b'h' => b'n',
+    b'i' => b'o',
+    b'j' => b'p',
+    b'k' => b'q',
+    b'l' => b'r',
+    b'm' => b's',
+    b'n' => b't',
+    b'o' => b'u',
+    b'p' => b'v',
+    b'q' => b'w',
+    b'r' => b'x',
+    b's' => b'y',
+    b't' => b'z',
+    b'u' => b'a',
+    b'v' => b'b',
+    b'w' => b'c',
+    b'x' => b'd',
+    b'y' => b'e',
+    b'z' => b'f',
+
+    b'A' => b'G',
+    b'B' => b'H',
+    b'C' => b'I',
+    b'D' => b'J',
+    b'E' => b'K',
+    b'F' => b'L',
+    b'G' => b'M',
+    b'H' => b'N',
+    b'I' => b'O',
+    b'J' => b'P',
+    b'K' => b'Q',
+    b'L' => b'R',
+    b'M' => b'S',
+    b'N' => b'T',
+    b'O' => b'U',
+    b'P' => b'V',
+    b'Q' => b'W',
+    b'R' => b'X',
+    b'S' => b'Y',
+    b'T' => b'Z',
+    b'U' => b'A',
+    b'V' => b'B',
+    b'W' => b'C',
+    b'X' => b'D',
+    b'Y' => b'E',
+    b'Z' => b'F',
+
+        _ => c,
     }
 }