serial works (HCI wrong value)

examples/serial-echo.rs

@@ -16,22 +16,23 @@ use f4::serial::Serial;
 use f4::stm32f4x;
 
 fn main() {
-    // let p = stm32f30x::Peripherals::take().unwrap();
+    let p = stm32f4x::Peripherals::take().unwrap();
 
-    // let mut flash = p.FLASH.constrain();
-    // let mut rcc = p.RCC.constrain();
-    // let mut gpioa = p.GPIOA.split(&mut rcc.ahb);
+    let mut flash = p.FLASH.constrain();
+    let mut rcc = p.RCC.constrain();
+    let mut gpioa = p.GPIOA.split(&mut rcc.ahb1);
 
-    // let clocks = rcc.cfgr.freeze(&mut flash.acr);
+    let clocks = rcc.cfgr.freeze(&mut flash.acr);
 
-    // let tx = gpioa.pa9.into_af7(&mut gpioa.moder, &mut gpioa.afrh);
-    // let rx = gpioa.pa10.into_af7(&mut gpioa.moder, &mut gpioa.afrh);
+    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::usart1(p.USART1, (tx, rx), 115_200.bps(), clocks, &mut rcc.apb2);
-    // let (mut tx, mut rx) = serial.split();
+    //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 (mut tx, mut rx) = serial.split();
 
-    // loop {
-    //     let byte = block!(rx.read()).unwrap();
-    //     block!(tx.write(byte)).ok();
-    // }
+    loop {
+        let byte = block!(rx.read()).unwrap();
+        block!(tx.write(byte)).ok();
+    }
 }