--- /dev/null
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "mbed_assert.h"
+#include "pinmap.h"
+#include "mbed_error.h"
+
+/**
+ * Set the pin into input, output, alternate function or analog mode
+ */
+void pin_function(PinName pin, int data) {
+ MBED_ASSERT(pin != (PinName)NC);
+
+ int mode = STM_PIN_MODE(data);
+ int func = STM_PIN_FUNC(data);
+
+ uint32_t pin_number = (uint32_t)pin;
+ int port_index = pin_number >> 4;
+ int pin_index = (pin_number & 0xF);
+ GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)));
+
+ // MODE
+ int offset = pin_index << 1;
+ gpio->MODER &= ~(0x3 << offset);
+ gpio->MODER |= mode << offset;
+
+ // Set high-speed mode
+ gpio->OSPEEDR &= ~(0x3 << offset);
+ gpio->OSPEEDR |= (0x2 << offset);
+
+ // FUNCTION
+ // Bottom seven pins are in AFR[0], top seven in AFR[1]
+ offset = (pin_index & 0x7) << 2;
+ if (pin_index <= 0x7) {
+ gpio->AFR[0] &= ~(0xF << offset);
+ gpio->AFR[0] |= func << offset;
+ }
+ else {
+ gpio->AFR[1] &= ~(0xF << offset);
+ gpio->AFR[1] |= func << offset;
+ }
+}
+
+void pin_mode(PinName pin, PinMode mode) {
+ MBED_ASSERT(pin != (PinName)NC);
+
+ uint32_t pin_number = (uint32_t)pin;
+ int port_index = pin_number >> 4;
+ int pin_index = (pin_number & 0xF);
+ int offset = pin_index << 1;
+
+ GPIO_TypeDef * gpio = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)));
+ if (mode == OpenDrain) {
+ gpio->OTYPER |= 1 << pin_index;
+ }
+ else {
+ gpio->OTYPER &= ~(1 << pin_index);
+ gpio->PUPDR &= ~(0x3 << offset);
+ gpio->PUPDR |= mode << offset;
+ }
+}
+