split Serial PINS

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+- serial: move TX pin and USART into `Tx` structure and RX pin into `Rx` structure
 - replace `GetBusFreq` with `BusClock` and `BusTimerClock`
 
 ## [v0.8.0] - 2021-12-29

examples/serial-interrupt-idle.rs

@@ -9,15 +9,19 @@ use panic_halt as _;
 
 use cortex_m_rt::entry;
 use stm32f1xx_hal::{
+    gpio::{
+        gpiob::{PB6, PB7},
+        Alternate, Floating, Input, PushPull,
+    },
     pac,
     pac::interrupt,
     pac::USART1,
     prelude::*,
     serial::{Config, Rx, Serial, Tx},
 };
 
-static mut RX: Option<Rx<USART1>> = None;
-static mut TX: Option<Tx<USART1>> = None;
+static mut RX: Option<Rx<USART1, PB7<Input<Floating>>>> = None;
+static mut TX: Option<Tx<USART1, PB6<Alternate<PushPull>>>> = None;
 #[entry]
 fn main() -> ! {
     // Get access to the device specific peripherals from the peripheral access crate

examples/serial.rs

@@ -89,5 +89,13 @@ fn main() -> ! {
     assert_eq!(received, sent);
     asm::bkpt();
 
+    // And later reunite it again
+    let mut serial = tx.reunite(rx);
+    let sent = b'Z';
+    block!(serial.write(sent)).ok();
+    let received = block!(serial.read()).unwrap();
+    assert_eq!(received, sent);
+    asm::bkpt();
+
     loop {}
 }