adding i2c pins for stm32l4x3 (#183)

* adding i2c pins for stm32l4x3

* fix import for stm32l4x1

* remove stm32l4x4 flag

* fix stm32l4x6 imports

* move to i2c2

* code cleanup

Author: sousandrei

src/i2c.rs

@@ -520,18 +520,21 @@ where
 use crate::gpio::gpioa::{PA10, PA9};
 use crate::gpio::gpiob::{PB10, PB11, PB6, PB7};
 
-#[cfg(feature = "stm32l4x5")]
+#[cfg(any(feature = "stm32l4x3", feature = "stm32l4x5"))]
 use crate::gpio::gpioc::{PC0, PC1};
 
+#[cfg(any(feature = "stm32l4x1", feature = "stm32l4x3", feature = "stm32l4x6"))]
+use crate::gpio::gpiob::PB8;
+
+#[cfg(any(feature = "stm32l4x1", feature = "stm32l4x6"))]
+use crate::gpio::gpiob::{PB13, PB14, PB9};
+
 pins!(I2C1, AF4,
     SCL: [PA9, PB6],
     SDA: [PA10, PB7]);
 
 pins!(I2C2, AF4, SCL: [PB10], SDA: [PB11]);
 
-#[cfg(any(feature = "stm32l4x1", feature = "stm32l4x6"))]
-use crate::gpio::gpiob::{PB13, PB14, PB8, PB9};
-
 #[cfg(any(feature = "stm32l4x1", feature = "stm32l4x6"))]
 pins!(I2C1, AF4, SCL: [PB8], SDA: [PB9]);
 
@@ -540,3 +543,9 @@ pins!(I2C2, AF4, SCL: [PB13], SDA: [PB14]);
 
 #[cfg(feature = "stm32l4x5")]
 pins!(I2C3, AF4, SCL: [PC0], SDA: [PC1]);
+
+#[cfg(feature = "stm32l4x3")]
+pins!(I2C1, AF4, SCL: [PB8], SDA: []);
+
+#[cfg(feature = "stm32l4x3")]
+pins!(I2C2, AF4, SCL: [PC0], SDA: [PC1]);