Serial: Replace Pins trait with TxPin / RxPin

Cargo.toml

@@ -264,15 +264,15 @@ opt-level = "s"
 
 [[example]]
 name = "adc_cont"
-required-features = ["stm32l0x2"]
+required-features = ["stm32l0x2", "io-STM32L071"]
 
 [[example]]
 name = "adc_multi"
-required-features = ["stm32l0x2"]
+required-features = ["stm32l0x2", "io-STM32L071"]
 
 [[example]]
 name = "adc_trig"
-required-features = ["stm32l0x2"]
+required-features = ["stm32l0x2", "io-STM32L071"]
 
 [[example]]
 name = "aes_ecb"
@@ -312,15 +312,19 @@ required-features = ["rt","stm32l0x2"]
 
 [[example]]
 name = "rtc"
-required-features = ["stm32l0x2"]
+required-features = ["stm32l0x2", "io-STM32L071"]
+
+[[example]]
+name = "serial"
+required-features = ["stm32l0x2", "io-STM32L071"]
 
 [[example]]
 name = "serial_dma"
-required-features = ["stm32l0x2"]
+required-features = ["stm32l0x2", "io-STM32L071"]
 
 [[example]]
 name = "serial_dma_async"
-required-features = ["stm32l0x2"]
+required-features = ["stm32l0x2", "io-STM32L071"]
 
 [[example]]
 name = "timer"

examples/rtc.rs

@@ -45,7 +45,8 @@ fn main() -> ! {
 
     let serial = dp.USART2
         .usart(
-            (gpioa.pa2, gpioa.pa3),
+            gpioa.pa2,
+            gpioa.pa3,
             serial::Config::default()
                 .baudrate(115_200.bps()),
             &mut rcc,

examples/serial.rs

@@ -22,20 +22,14 @@ fn main() -> ! {
     // the RCC register.
     let gpioa = dp.GPIOA.split(&mut rcc);
 
-    #[cfg(feature = "stm32l0x1")]
-    let tx_pin = gpioa.pa9;
-    #[cfg(feature = "stm32l0x1")]
-    let rx_pin = gpioa.pa10;
-
-    #[cfg(any(feature = "stm32l0x2", feature = "stm32l0x3"))]
-    let tx_pin = gpioa.pa14;
-    #[cfg(any(feature = "stm32l0x2", feature = "stm32l0x3"))]
-    let rx_pin = gpioa.pa15;
+    // Choose TX / RX pins
+    let tx_pin = gpioa.pa2;
+    let rx_pin = gpioa.pa3;
 
     // Configure the serial peripheral.
     let serial = dp
         .USART2
-        .usart((tx_pin, rx_pin), serial::Config::default(), &mut rcc)
+        .usart(tx_pin, rx_pin, serial::Config::default(), &mut rcc)
         .unwrap();
 
     let (mut tx, mut rx) = serial.split();

examples/serial_dma.rs

@@ -42,7 +42,8 @@ fn main() -> ! {
     let (mut tx, mut rx) = dp
         .USART2
         .usart(
-            (gpioa.pa2, gpioa.pa3),
+            gpioa.pa2,
+            gpioa.pa3,
             serial::Config::default().baudrate(115_200.bps()),
             &mut rcc,
         )

examples/serial_dma_async.rs

@@ -46,14 +46,15 @@ fn main() -> ! {
     let gpioa = dp.GPIOA.split(&mut rcc);
 
     let (tx, rx) = dp
-    .USART2
-    .usart(
-        (gpioa.pa2, gpioa.pa3),
-        serial::Config::default().baudrate(115_200.bps()),
-        &mut rcc,
-    )
-    .unwrap()
-    .split();
+        .USART2
+        .usart(
+            gpioa.pa2,
+            gpioa.pa3,
+            serial::Config::default().baudrate(115_200.bps()),
+            &mut rcc,
+        )
+        .unwrap()
+        .split();
 
     // we only have two elements for each queue, so U2 is fine (size is max 2)
     let mut rx_buffers: Queue<Pin<DmaBuffer>, U2> = Queue::new();

src/dma.rs

@@ -35,13 +35,29 @@ use crate::{
         I2C1,
         I2C2,
         I2C3,
-        USART1,
-        USART2,
     },
     rcc::Rcc,
-    serial,
 };
 
+#[cfg(any(feature = "io-STM32L051", feature = "io-STM32L071"))]
+use crate::pac::USART1;
+
+#[cfg(any(
+    feature = "io-STM32L021",
+    feature = "io-STM32L031",
+    feature = "io-STM32L051",
+    feature = "io-STM32L071",
+))]
+use crate::pac::USART2;
+
+#[cfg(any(
+    feature = "io-STM32L021",
+    feature = "io-STM32L031",
+    feature = "io-STM32L051",
+    feature = "io-STM32L071",
+))]
+use crate::serial;
+
 #[cfg(feature = "stm32l082")]
 use crate::aes;
 
@@ -521,13 +537,24 @@ impl_target!(
     // ADC
     adc::DmaToken, Channel1, 0;
     adc::DmaToken, Channel2, 0;
+);
 
+#[cfg(any(feature = "io-STM32L051", feature = "io-STM32L071"))]
+impl_target!(
     // USART1
     serial::Tx<USART1>, Channel2, 3;
     serial::Tx<USART1>, Channel4, 3;
     serial::Rx<USART1>, Channel3, 3;
     serial::Rx<USART1>, Channel5, 3;
+);
 
+#[cfg(any(
+    feature = "io-STM32L021",
+    feature = "io-STM32L031",
+    feature = "io-STM32L051",
+    feature = "io-STM32L071",
+))]
+impl_target!(
     // USART2
     serial::Tx<USART2>, Channel4, 4;
     serial::Tx<USART2>, Channel7, 4;

src/lib.rs

@@ -32,6 +32,12 @@ pub mod rcc;
 #[cfg(any(feature = "stm32l0x2", feature = "stm32l0x3"))]
 pub mod rng;
 pub mod rtc;
+#[cfg(any(
+    feature = "io-STM32L021",
+    feature = "io-STM32L031",
+    feature = "io-STM32L051",
+    feature = "io-STM32L071",
+))]
 pub mod serial;
 pub mod spi;
 pub mod syscfg;

src/prelude.rs

@@ -16,10 +16,6 @@ pub use crate::{
     i2c::I2cExt as _,
     pwr::PowerMode as _,
     rcc::RccExt as _,
-    serial::{
-        Serial1Ext as _,
-        Serial2Ext as _,
-    },
     spi::SpiExt as _,
     time::U32Ext as _,
     timer::TimerExt as _,
@@ -28,3 +24,26 @@ pub use crate::{
         WindowWatchdogExt as _,
     },
 };
+
+#[cfg(any(
+    feature = "io-STM32L021",
+    feature = "io-STM32L031",
+    feature = "io-STM32L051",
+    feature = "io-STM32L071",
+))]
+pub use crate::serial::{
+    Serial1LpExt as _,
+    Serial2Ext as _,
+};
+#[cfg(any(
+    feature = "io-STM32L051",
+    feature = "io-STM32L071",
+))]
+pub use crate::serial::Serial1LpExt as _;
+#[cfg(any(
+    feature = "io-STM32L071",
+))]
+pub use crate::serial::{
+    Serial4Ext as _,
+    Serial5Ext as _,
+};