diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29d626e..ba25d5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Added
 
-- Support for STM32F091 - @jessebraham
+- Support for stm32f0x1 line - @jessebraham
 - Support for HSE as a system clocksource (#25 - breaking change) - @zklapow
 
 ### Changed
@@ -66,7 +66,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Reworked GPIOs and added fully erased pins
 - Timer support
-- Support for STM32F070
+- Support for STM32F070 - @jessebraham
 - Additional peripheral support for STM32F030
 - Watchdog support
 
diff --git a/Cargo.toml b/Cargo.toml
index 5cf3bbe..88f1086 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -46,15 +46,18 @@ panic-halt = "0.2.0"
 [features]
 device-selected = []
 rt = ["stm32f0/rt"]
-stm32f042 = ["stm32f0/stm32f0x2", "device-selected"]
 stm32f030 = ["stm32f0/stm32f0x0", "device-selected"]
 stm32f030x4 = ["stm32f030x6"]
 stm32f030x6 = ["stm32f030"]
 stm32f030x8 = ["stm32f030"]
 stm32f030xc = ["stm32f030"]
+stm32f031 = ["stm32f0/stm32f0x1", "device-selected"]
+stm32f042 = ["stm32f0/stm32f0x2", "device-selected"]
+stm32f051 = ["stm32f0/stm32f0x1", "device-selected"]
 stm32f070 = ["stm32f0/stm32f0x0", "device-selected"]
 stm32f070x6 = ["stm32f070"]
 stm32f070xb = ["stm32f070"]
+stm32f071 = ["stm32f0/stm32f0x1", "device-selected"]
 stm32f072 = ["stm32f0/stm32f0x2", "device-selected"]
 stm32f091 = ["stm32f0/stm32f0x1", "device-selected"]
 
diff --git a/README.md b/README.md
index 80ee282..eb30196 100644
--- a/README.md
+++ b/README.md
@@ -18,8 +18,11 @@ Supported Configurations
 ------------------------
 
 * __stm32f030__ (stm32f030x4, stm32f030x6, stm32f030x8, stm32f030xc)  
+* __stm32f031__  
 * __stm32f042__  
+* __stm32f051__  
 * __stm32f070__ (stm32f070x6, stm32f070xb)  
+* __stm32f071__  
 * __stm32f072__  
 * __stm32f091__  
 
diff --git a/src/adc.rs b/src/adc.rs
index cdc7aa5..63246e7 100644
--- a/src/adc.rs
+++ b/src/adc.rs
@@ -206,7 +206,9 @@ adc_pins!(
 
 #[cfg(any(
     feature = "stm32f030",
+    feature = "stm32f051",
     feature = "stm32f070",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091"
 ))]
@@ -350,17 +352,38 @@ impl VRef {
     }
 }
 
-#[cfg(any(feature = "stm32f042", feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(
+    feature = "stm32f031",
+    feature = "stm32f042",
+    feature = "stm32f051",
+    feature = "stm32f071",
+    feature = "stm32f072",
+    feature = "stm32f091",
+))]
 #[derive(Debug, Default)]
 /// Battery reference voltage (ADC Channel 18)
 pub struct VBat;
 
-#[cfg(any(feature = "stm32f042", feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(
+    feature = "stm32f031",
+    feature = "stm32f042",
+    feature = "stm32f051",
+    feature = "stm32f071",
+    feature = "stm32f072",
+    feature = "stm32f091",
+))]
 adc_pins!(
     VBat  => 18_u8,
 );
 
-#[cfg(any(feature = "stm32f042", feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(
+    feature = "stm32f031",
+    feature = "stm32f042",
+    feature = "stm32f051",
+    feature = "stm32f071",
+    feature = "stm32f072",
+    feature = "stm32f091",
+))]
 impl VBat {
     /// Init a new VBat
     pub fn new() -> Self {
diff --git a/src/gpio.rs b/src/gpio.rs
index f8c40a6..6d7be1d 100644
--- a/src/gpio.rs
+++ b/src/gpio.rs
@@ -570,7 +570,9 @@ gpio!(GPIOC, gpioc, iopcen, PC, [
 
 #[cfg(any(
     feature = "stm32f030",
+    feature = "stm32f051",
     feature = "stm32f070",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -593,12 +595,12 @@ gpio!(GPIOC, gpioc, iopcen, PC, [
     PC15: (pc15, 15, Input<Floating>),
 ]);
 
-#[cfg(any(feature = "stm32f030", feature = "stm32f070"))]
+#[cfg(any(feature = "stm32f030", feature = "stm32f051", feature = "stm32f070"))]
 gpio!(GPIOD, gpiod, iopden, PD, [
     PD2: (pd2, 2, Input<Floating>),
 ]);
 
-#[cfg(any(feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(feature = "stm32f071", feature = "stm32f072", feature = "stm32f091"))]
 gpio!(GPIOD, gpiod, iopden, PD, [
     PD0: (pd0, 0, Input<Floating>),
     PD1: (pd1, 1, Input<Floating>),
@@ -621,7 +623,7 @@ gpio!(GPIOD, gpiod, iopden, PD, [
 // TODO: The ST SVD files are missing the entire PE enable register.
 //       Re-enable as soon as this gets fixed.
 
-// #[cfg(any(feature = "stm32f072", feature = "stm32f091"))]
+// #[cfg(any(feature = "stm32f071", feature = "stm32f072", feature = "stm32f091"))]
 // gpio!(GPIOE, gpioe, iopeen, PE, [
 //     PE0: (pe0, 0, Input<Floating>),
 //     PE1: (pe1, 1, Input<Floating>),
@@ -648,14 +650,20 @@ gpio!(GPIOF, gpiof, iopfen, PF, [
     PF11: (pf11, 11, Input<Floating>),
 ]);
 
-#[cfg(feature = "stm32f030")]
+#[cfg(any(feature = "stm32f030", feature = "stm32f051"))]
 gpio!(GPIOF, gpiof, iopfen, PF, [
     PF0: (pf0, 0, Input<Floating>),
     PF1: (pf1, 1, Input<Floating>),
     PF4: (pf4, 4, Input<Floating>),
     PF5: (pf5, 5, Input<Floating>),
-    PF6: (pf6, 5, Input<Floating>),
-    PF7: (pf7, 5, Input<Floating>),
+    PF6: (pf6, 6, Input<Floating>),
+    PF7: (pf7, 7, Input<Floating>),
+]);
+
+#[cfg(feature = "stm32f031")]
+gpio!(GPIOF, gpiof, iopfen, PF, [
+    PF6: (pf6, 6, Input<Floating>),
+    PF7: (pf7, 7, Input<Floating>),
 ]);
 
 #[cfg(feature = "stm32f070")]
@@ -664,7 +672,7 @@ gpio!(GPIOF, gpiof, iopfen, PF, [
     PF1: (pf1, 1, Input<Floating>),
 ]);
 
-#[cfg(any(feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(feature = "stm32f071", feature = "stm32f072", feature = "stm32f091"))]
 gpio!(GPIOF, gpiof, iopfen, PF, [
     PF0: (pf0, 0, Input<Floating>),
     PF1: (pf1, 1, Input<Floating>),
diff --git a/src/i2c.rs b/src/i2c.rs
index bba521e..a56fe97 100644
--- a/src/i2c.rs
+++ b/src/i2c.rs
@@ -33,16 +33,26 @@ macro_rules! i2c_pins {
     }
 }
 
-#[cfg(any(feature = "stm32f030", feature = "stm32f042"))]
+#[cfg(any(
+    feature = "stm32f030",
+    feature = "stm32f031",
+    feature = "stm32f042",
+    feature = "stm32f051",
+    feature = "stm32f070",
+    feature = "stm32f071",
+    feature = "stm32f072",
+    feature = "stm32f091",
+))]
 i2c_pins! {
     I2C1 => {
-        scl => [gpioa::PA11<Alternate<AF5>>, gpiob::PB6<Alternate<AF1>>, gpiob::PB8<Alternate<AF1>>],
-        sda => [gpioa::PA12<Alternate<AF5>>, gpiob::PB7<Alternate<AF1>>, gpiob::PB9<Alternate<AF1>>],
+        scl => [gpiob::PB6<Alternate<AF1>>, gpiob::PB8<Alternate<AF1>>],
+        sda => [gpiob::PB7<Alternate<AF1>>, gpiob::PB9<Alternate<AF1>>],
     }
 }
 #[cfg(any(
     feature = "stm32f030x6",
     feature = "stm32f030xc",
+    feature = "stm32f031",
     feature = "stm32f042",
     feature = "stm32f091",
 ))]
@@ -52,7 +62,14 @@ i2c_pins! {
         sda => [gpioa::PA10<Alternate<AF4>>],
     }
 }
-#[cfg(any(feature = "stm32f042", feature = "stm32f030x6"))]
+#[cfg(any(feature = "stm32f030", feature = "stm32f042"))]
+i2c_pins! {
+    I2C1 => {
+        scl => [gpioa::PA11<Alternate<AF5>>],
+        sda => [gpioa::PA12<Alternate<AF5>>],
+    }
+}
+#[cfg(any(feature = "stm32f031", feature = "stm32f042", feature = "stm32f030x6"))]
 i2c_pins! {
     I2C1 => {
         scl => [gpiob::PB10<Alternate<AF1>>],
@@ -66,13 +83,6 @@ i2c_pins! {
         sda => [gpiob::PB14<Alternate<AF5>>, gpiof::PF0<Alternate<AF1>>],
     }
 }
-#[cfg(any(feature = "stm32f070", feature = "stm32f072", feature = "stm32f091"))]
-i2c_pins! {
-    I2C1 => {
-        scl => [gpiob::PB6<Alternate<AF1>>, gpiob::PB8<Alternate<AF1>>],
-        sda => [gpiob::PB7<Alternate<AF1>>, gpiob::PB9<Alternate<AF1>>],
-    }
-}
 #[cfg(feature = "stm32f070x6")]
 i2c_pins! {
     I2C1 => {
@@ -88,7 +98,7 @@ i2c_pins! {
     }
 }
 
-#[cfg(any(feature = "stm32f030x8"))]
+#[cfg(any(feature = "stm32f030x8", feature = "stm32f051"))]
 i2c_pins! {
     I2C2 => {
         scl => [gpiob::PB10<Alternate<AF1>>],
@@ -98,6 +108,7 @@ i2c_pins! {
 #[cfg(any(
     feature = "stm32f030xc",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -150,9 +161,9 @@ i2c! {
 
 #[cfg(any(
     feature = "stm32f030xc",
-    // XXX: This can't be right
-    feature = "stm32f030xc",
+    feature = "stm32f051",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
diff --git a/src/lib.rs b/src/lib.rs
index abc82b6..cf36be8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,7 +6,12 @@ pub use stm32f0;
 #[cfg(any(feature = "stm32f030", feature = "stm32f070"))]
 pub use stm32f0::stm32f0x0 as stm32;
 
-#[cfg(feature = "stm32f091")]
+#[cfg(any(
+    feature = "stm32f031",
+    feature = "stm32f051",
+    feature = "stm32f071",
+    feature = "stm32f091",
+))]
 pub use stm32f0::stm32f0x1 as stm32;
 
 #[cfg(any(feature = "stm32f042", feature = "stm32f072"))]
diff --git a/src/serial.rs b/src/serial.rs
index 1e8fbb1..af7ebbd 100644
--- a/src/serial.rs
+++ b/src/serial.rs
@@ -85,32 +85,45 @@ macro_rules! usart_pins {
     }
 }
 
-#[cfg(any(feature = "stm32f030", feature = "stm32f042"))]
+#[cfg(any(
+    feature = "stm32f030",
+    feature = "stm32f042",
+    feature = "stm32f051",
+    feature = "stm32f071",
+))]
 usart_pins! {
     USART1 =>  {
         tx => [gpioa::PA9<Alternate<AF1>>, gpiob::PB6<Alternate<AF0>>],
         rx => [gpioa::PA10<Alternate<AF1>>, gpiob::PB6<Alternate<AF0>>],
     }
 }
-#[cfg(feature = "stm32f030x6")]
+#[cfg(any(feature = "stm32f031", feature = "stm32f030x6"))]
 usart_pins! {
     USART1 => {
         tx => [gpioa::PA2<Alternate<AF1>>, gpioa::PA14<Alternate<AF1>>],
         rx => [gpioa::PA3<Alternate<AF1>>, gpioa::PA15<Alternate<AF1>>],
     }
 }
-#[cfg(any(feature = "stm32f070", feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(
+    feature = "stm32f031",
+    feature = "stm32f070",
+    feature = "stm32f072",
+    feature = "stm32f091",
+))]
 usart_pins! {
     USART1 => {
         tx => [gpioa::PA9<Alternate<AF1>>, gpiob::PB6<Alternate<AF0>>],
         rx => [gpioa::PA10<Alternate<AF1>>, gpiob::PB7<Alternate<AF0>>],
     }
 }
+
 #[cfg(any(
     feature = "stm32f030x8",
     feature = "stm32f030xc",
     feature = "stm32f042",
+    feature = "stm32f051",
     feature = "stm32f070",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -120,16 +133,18 @@ usart_pins! {
         rx => [gpioa::PA3<Alternate<AF1>>, gpioa::PA15<Alternate<AF1>>],
     }
 }
-#[cfg(any(feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(feature = "stm32f072", feature = "stm32f071", feature = "stm32f091"))]
 usart_pins! {
     USART2 => {
         tx => [gpiod::PD5<Alternate<AF0>>],
         rx => [gpiod::PD6<Alternate<AF0>>],
     }
 }
+
 #[cfg(any(
     feature = "stm32f030xc",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -144,13 +159,14 @@ usart_pins! {
         rx => [gpioa::PA1<Alternate<AF4>>, gpioc::PC11<Alternate<AF0>>],
     }
 }
-#[cfg(any(feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(feature = "stm32f071", feature = "stm32f072", feature = "stm32f091"))]
 usart_pins! {
     USART3 => {
         tx => [gpiod::PD8<Alternate<AF0>>],
         rx => [gpiod::PD9<Alternate<AF0>>],
     }
 }
+
 // TODO: The ST SVD files are missing the entire PE enable register.
 //       Re-enable as soon as this gets fixed.
 // #[cfg(feature = "stm32f091")]
@@ -160,6 +176,7 @@ usart_pins! {
 //         rx => [gpioe::PE9<Alternate<AF1>>],
 //     }
 // }
+
 #[cfg(any(feature = "stm32f030xc", feature = "stm32f091"))]
 usart_pins! {
     USART5 => {
@@ -278,7 +295,9 @@ usart! {
     feature = "stm32f030x8",
     feature = "stm32f030xc",
     feature = "stm32f042",
+    feature = "stm32f051",
     feature = "stm32f070",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -288,6 +307,7 @@ usart! {
 #[cfg(any(
     feature = "stm32f030xc",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
diff --git a/src/spi.rs b/src/spi.rs
index 947a43f..7818871 100644
--- a/src/spi.rs
+++ b/src/spi.rs
@@ -49,7 +49,9 @@ use crate::stm32::SPI1;
 #[cfg(any(
     feature = "stm32f030x8",
     feature = "stm32f030xc",
+    feature = "stm32f051",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f091",
 ))]
 use crate::stm32::SPI2;
@@ -121,7 +123,7 @@ spi_pins! {
 // TODO: The ST SVD files are missing the entire PE enable register.
 //       So those pins do not exist in the register definitions.
 //       Re-enable as soon as this gets fixed.
-// #[cfg(any(feature = "stm32f072", feature = "stm32f091"))]
+// #[cfg(any(feature = "stm32f071", feature = "stm32f072", feature = "stm32f091"))]
 // spi_pins! {
 //     SPI1 => {
 //         sck => [gpioe::PE13<Alternate<AF1>>],
@@ -133,7 +135,9 @@ spi_pins! {
 #[cfg(any(
     feature = "stm32f030x8",
     feature = "stm32f030xc",
+    feature = "stm32f051",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -147,6 +151,7 @@ spi_pins! {
 #[cfg(any(
     feature = "stm32f030xc",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -157,7 +162,7 @@ spi_pins! {
         mosi => [gpioc::PC3<Alternate<AF1>>],
     }
 }
-#[cfg(any(feature = "stm32f072", feature = "stm32f091"))]
+#[cfg(any(feature = "stm32f071", feature = "stm32f072", feature = "stm32f091"))]
 spi_pins! {
     SPI2 => {
         sck => [gpiod::PD1<Alternate<AF1>>],
@@ -204,7 +209,9 @@ spi! {
 #[cfg(any(
     feature = "stm32f030x8",
     feature = "stm32f030xc",
+    feature = "stm32f051",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f091",
 ))]
 spi! {
diff --git a/src/timers.rs b/src/timers.rs
index 42c9c6e..08e8018 100644
--- a/src/timers.rs
+++ b/src/timers.rs
@@ -222,10 +222,24 @@ timers! {
     TIM17: (tim17, tim17en, tim17rst, apb2enr, apb2rstr),
 }
 
+#[cfg(any(
+    feature = "stm32f031",
+    feature = "stm32f042",
+    feature = "stm32f051",
+    feature = "stm32f071",
+    feature = "stm32f072",
+    feature = "stm32f091",
+))]
+timers! {
+    TIM2: (tim2, tim2en, tim2rst, apb1enr, apb1rstr),
+}
+
 #[cfg(any(
     feature = "stm32f030x8",
     feature = "stm32f030xc",
+    feature = "stm32f051",
     feature = "stm32f070xb",
+    feature = "stm32f071",
     feature = "stm32f072",
     feature = "stm32f091",
 ))]
@@ -243,8 +257,3 @@ timers! {
 timers! {
     TIM7: (tim7, tim7en, tim7rst, apb1enr, apb1rstr),
 }
-
-#[cfg(any(feature = "stm32f042", feature = "stm32f072", feature = "stm32f091"))]
-timers! {
-    TIM2: (tim2, tim2en, tim2rst, apb1enr, apb1rstr),
-}