logging: implement rtt logging output

Cargo.toml

@@ -23,6 +23,7 @@ wokwi = ["max-usb-power"]
 mpu = ["dep:mpu6050-dmp"]
 gps = ["dep:nmea"]
 oled = ["dep:ssd1306"]
+rtt = ["dep:rtt-target"]
 demo = []
 
 [dependencies]

src/logging.rs

@@ -22,6 +22,9 @@ static LOGGER: StaticCell<RenderbugLogger> = StaticCell::new();
 
 impl RenderbugLogger {
     pub fn init_logger() {
+        #[cfg(feature = "rtt")]
+        rtt_target::rtt_init_print!(rtt_target::ChannelMode::BlockIfFull);
+
         let logger = LOGGER.init(Default::default());
         unsafe {
             log::set_logger_racy(logger).ok();
@@ -62,6 +65,9 @@ impl log::Log for RenderbugLogger {
         };
         let suffix = filename.split('/').next_back().unwrap();
         self.lock.lock(|_| {
+            #[cfg(feature = "rtt")]
+            rtt_target::rprintln!("{}{}\t{}{}/{}:{}{}\t{}{}", color, record.level(), GREY, prefix, suffix, record.line().map_or(0, |f| {f}), RESET, record.args(), RESET);
+            
             println!("{color}{}\t{GREY}{prefix}/{suffix}:{}{RESET}\t{}{RESET}", record.level(), record.line().map_or(0, |f| {f}), record.args());
         });
     }