diff --git a/PS3USB.cpp b/PS3USB.cpp
index 43b12648..cfe6f631 100755
--- a/PS3USB.cpp
+++ b/PS3USB.cpp
@@ -553,7 +553,7 @@ void PS3USB::getMoveCalibration(uint8_t *data) {
                 // bmRequest = Device to host (0x80) | Class (0x20) | Interface (0x01) = 0xA1, bRequest = Get Report (0x01), Report ID (0x10), Report Type (Feature 0x03), interface (0x00), datalength, datalength, data
                 pUsb->ctrlReq(bAddress, epInfo[PS3_CONTROL_PIPE].epAddr, bmREQ_HID_IN, HID_REQUEST_GET_REPORT, 0x10, 0x03, 0x00, 49, 49, buf, NULL);
 
-                for(byte j = 0; j < 49; j++)
+                for(uint8_t j = 0; j < 49; j++)
                         data[49 * i + j] = buf[j];
         }
 }
diff --git a/README.md b/README.md
index 548f46b6..20e83432 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,8 @@ Currently the following boards are supported by the library:
 * RedBearLab nRF51822
 * Digilent chipKIT
     * Please see: <http://www.circuitsathome.com/mcu/usb/running-usb-host-code-on-digilent-chipkit-board>.
+* STM32F4
+    * Currently the [NUCLEO-F446RE](http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/LN1847/PF262063) is supported featuring the STM32F446. Take a look at the following example code: <https://github.com/Lauszus/Nucleo_F446RE_USBHost>.
 
 The following boards need to be activated manually in [settings.h](settings.h):
 
diff --git a/avrpins.h b/avrpins.h
index 05c9ab79..b73a6bc6 100644
--- a/avrpins.h
+++ b/avrpins.h
@@ -1074,6 +1074,62 @@ MAKE_PIN(P24, Pin_nRF51822_to_Arduino(D24));
 
 #undef MAKE_PIN
 
+#elif defined(STM32F446xx)
+// NUCLEO-F446RE
+
+#define MAKE_PIN(className, port, pin) \
+class className { \
+public: \
+  static void Set() { \
+    HAL_GPIO_WritePin(port, pin, GPIO_PIN_SET); \
+  } \
+  static void Clear() { \
+    HAL_GPIO_WritePin(port, pin, GPIO_PIN_RESET); \
+  } \
+  static void SetDirRead() { \
+    static GPIO_InitTypeDef GPIO_InitStruct; \
+    GPIO_InitStruct.Pin = pin; \
+    GPIO_InitStruct.Mode = GPIO_MODE_INPUT; \
+    GPIO_InitStruct.Pull = GPIO_NOPULL; \
+    HAL_GPIO_Init(port, &GPIO_InitStruct); \
+  } \
+  static void SetDirWrite() { \
+    static GPIO_InitTypeDef GPIO_InitStruct; \
+    GPIO_InitStruct.Pin = pin; \
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; \
+    GPIO_InitStruct.Pull = GPIO_NOPULL; \
+    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; \
+    HAL_GPIO_Init(port, &GPIO_InitStruct); \
+  } \
+  static GPIO_PinState IsSet() { \
+    return HAL_GPIO_ReadPin(port, pin); \
+  } \
+};
+
+MAKE_PIN(P0, GPIOA, GPIO_PIN_3); // D0
+MAKE_PIN(P1, GPIOA, GPIO_PIN_2); // D1
+MAKE_PIN(P2, GPIOA, GPIO_PIN_10); // D2
+MAKE_PIN(P3, GPIOB, GPIO_PIN_3); // D3
+MAKE_PIN(P4, GPIOB, GPIO_PIN_5); // D4
+MAKE_PIN(P5, GPIOB, GPIO_PIN_4); // D5
+MAKE_PIN(P6, GPIOB, GPIO_PIN_10); // D6
+MAKE_PIN(P7, GPIOA, GPIO_PIN_8); // D7
+MAKE_PIN(P8, GPIOA, GPIO_PIN_9); // D8
+MAKE_PIN(P9, GPIOC, GPIO_PIN_7); // D9
+MAKE_PIN(P10, GPIOB, GPIO_PIN_6); // D10
+MAKE_PIN(P11, GPIOA, GPIO_PIN_7); // D11
+MAKE_PIN(P12, GPIOA, GPIO_PIN_6); // D12
+MAKE_PIN(P13, GPIOA, GPIO_PIN_5); // D13
+
+MAKE_PIN(P14, GPIOA, GPIO_PIN_0); // A0
+MAKE_PIN(P15, GPIOA, GPIO_PIN_1); // A1
+MAKE_PIN(P16, GPIOA, GPIO_PIN_4); // A2
+MAKE_PIN(P17, GPIOB, GPIO_PIN_0); // A3
+MAKE_PIN(P18, GPIOC, GPIO_PIN_1); // A4
+MAKE_PIN(P19, GPIOC, GPIO_PIN_0); // A5
+
+#undef MAKE_PIN
+
 #else
 #error "Please define board in avrpins.h"
 
diff --git a/max_LCD.cpp b/max_LCD.cpp
index f0c64666..7a9b1707 100644
--- a/max_LCD.cpp
+++ b/max_LCD.cpp
@@ -37,7 +37,7 @@ e-mail   :  support@circuitsathome.com
                             sendbyte(a);    \
                         }
 
-static byte lcdPins; //copy of LCD pins
+static uint8_t lcdPins; //copy of LCD pins
 
 Max_LCD::Max_LCD(USB *pusb) : pUsb(pusb) {
         lcdPins = 0;
diff --git a/settings.h b/settings.h
index 9d3a69cd..6c1979af 100644
--- a/settings.h
+++ b/settings.h
@@ -142,4 +142,9 @@ e-mail   :  support@circuitsathome.com
 #include <../../../../hardware/pic32/libraries/SPI/SPI.h> // Hack to use the SPI library
 #endif
 
+#ifdef STM32F4
+#include "stm32f4xx_hal.h"
+extern SPI_HandleTypeDef SPI_Handle; // Needed to be declared in your main.cpp
+#endif
+
 #endif /* SETTINGS_H */
diff --git a/usbhost.h b/usbhost.h
index 383ce7e8..15a57bd1 100644
--- a/usbhost.h
+++ b/usbhost.h
@@ -45,6 +45,11 @@ public:
                 SPI_SS::SetDirWrite();
                 SPI_SS::Set();
         }
+#elif defined(STM32F4)
+#warning "You need to initialize the SPI interface manually when using the STM32F4 platform"
+        static void init() {
+                // Should be initialized by the user manually for now
+        }
 #elif !defined(SPDR)
         static void init() {
                 SPI_SS::SetDirWrite();
@@ -86,7 +91,7 @@ typedef SPi< Pb1, Pb2, Pb3, Pb0 > spi;
 typedef SPi< Pb5, Pb3, Pb4, Pb2 > spi;
 #elif defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega1284__) || defined(__AVR_ATmega1284P__)
 typedef SPi< Pb7, Pb5, Pb6, Pb4 > spi;
-#elif (defined(CORE_TEENSY) && (defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MKL26Z64__))) || defined(__ARDUINO_X86__) || defined(__MIPSEL__)
+#elif (defined(CORE_TEENSY) && (defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MKL26Z64__))) || defined(__ARDUINO_X86__) || defined(__MIPSEL__) || defined(STM32F4)
 typedef SPi< P13, P11, P12, P10 > spi;
 #elif defined(ARDUINO_SAM_DUE) && defined(__SAM3X8E__)
 typedef SPi< P76, P75, P74, P10 > spi;
@@ -162,6 +167,11 @@ void MAX3421e< SPI_SS, INTR >::regWr(uint8_t reg, uint8_t data) {
         c[0] = reg | 0x02;
         c[1] = data;
         SPI.transfer(c, 2);
+#elif defined(STM32F4)
+        uint8_t c[2];
+        c[0] = reg | 0x02;
+        c[1] = data;
+        HAL_SPI_Transmit(&SPI_Handle, c, 2, HAL_MAX_DELAY);
 #elif !defined(SPDR)
         SPI.transfer(reg | 0x02);
         SPI.transfer(data);
@@ -202,6 +212,11 @@ uint8_t* MAX3421e< SPI_SS, INTR >::bytesWr(uint8_t reg, uint8_t nbytes, uint8_t*
         SPI.transfer(reg | 0x02);
         SPI.transferBuffer(data_p, NULL, nbytes);
         data_p += nbytes;
+#elif defined(STM32F4)
+        uint8_t data = reg | 0x02;
+        HAL_SPI_Transmit(&SPI_Handle, &data, 1, HAL_MAX_DELAY);
+        HAL_SPI_Transmit(&SPI_Handle, data_p, nbytes, HAL_MAX_DELAY);
+        data_p += nbytes;
 #elif !defined(SPDR)
         SPI.transfer(reg | 0x02);
         while(nbytes) {
@@ -252,6 +267,11 @@ uint8_t MAX3421e< SPI_SS, INTR >::regRd(uint8_t reg) {
         spi4teensy3::send(reg);
         uint8_t rv = spi4teensy3::receive();
         SPI_SS::Set();
+#elif defined(STM32F4)
+        HAL_SPI_Transmit(&SPI_Handle, &reg, 1, HAL_MAX_DELAY);
+        uint8_t rv = 0;
+        HAL_SPI_Receive(&SPI_Handle, &rv, 1, HAL_MAX_DELAY);
+        SPI_SS::Set();
 #elif !defined(SPDR) || SPI_HAS_TRANSACTION
         SPI.transfer(reg);
         uint8_t rv = SPI.transfer(0); // Send empty byte
@@ -295,6 +315,11 @@ uint8_t* MAX3421e< SPI_SS, INTR >::bytesRd(uint8_t reg, uint8_t nbytes, uint8_t*
         SPI.transfer(reg);
         SPI.transferBuffer(NULL, data_p, nbytes);
         data_p += nbytes;
+#elif defined(STM32F4)
+        HAL_SPI_Transmit(&SPI_Handle, &reg, 1, HAL_MAX_DELAY);
+        memset(data_p, 0, nbytes); // Make sure we send out empty bytes
+        HAL_SPI_Receive(&SPI_Handle, data_p, nbytes, HAL_MAX_DELAY);
+        data_p += nbytes;
 #elif !defined(SPDR)
         SPI.transfer(reg);
         while(nbytes) {