serial works

examples/serial-echo.rs

@@ -27,8 +27,7 @@ fn main() {
     let tx = gpioa.pa2.into_af7(&mut gpioa.moder, &mut gpioa.afrl);
     let rx = gpioa.pa3.into_af7(&mut gpioa.moder, &mut gpioa.afrl);
 
-    //let serial = Serial::usart2(p.USART2, (tx, rx), 115_200.bps(), clocks, &mut rcc.apb1);
-    let serial = Serial::usart2(p.USART2, (tx, rx), 57_600.bps(), clocks, &mut rcc.apb1);
+    let serial = Serial::usart2(p.USART2, (tx, rx), 115_200.bps(), clocks, &mut rcc.apb1);
     let (mut tx, mut rx) = serial.split();
 
     loop {

src/rcc.rs

@@ -93,7 +93,7 @@ impl APB2 {
     }
 }
 
-const HSI: u32 = 8_000_000; // Hz
+const HSI: u32 = 16_000_000; // Hz
 
 /// Clock configuration
 pub struct CFGR {