tmk_core/tool/mbed/mbed-sdk/libraries/mbed/hal/gpio_api.h

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 #ifndef MBED_GPIO_API_H
  17 #define MBED_GPIO_API_H
  18
  19 #include "device.h"
  20
  21 #ifdef __cplusplus
  22 extern "C" {
  23 #endif
  24
  25 /* Set the given pin as GPIO
  26  * @param pin The pin to be set as GPIO
  27  * @return The GPIO port mask for this pin
  28  **/
  29 uint32_t gpio_set(PinName pin);
  30
  31 /* Checks if gpio object is connected (pin was not initialized with NC)
  32  * @param pin The pin to be set as GPIO
  33  * @return 0 if port is initialized with NC
  34  **/
  35 int gpio_is_connected(const gpio_t *obj);
  36
  37 /* GPIO object */
  38 void gpio_init(gpio_t *obj, PinName pin);
  39
  40 void gpio_mode (gpio_t *obj, PinMode mode);
  41 void gpio_dir  (gpio_t *obj, PinDirection direction);
  42
  43 void gpio_write(gpio_t *obj, int value);
  44 int  gpio_read (gpio_t *obj);
  45
  46 // the following set of functions are generic and are implemented in the common gpio.c file
  47 void gpio_init_in(gpio_t* gpio, PinName pin);
  48 void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode);
  49 void gpio_init_out(gpio_t* gpio, PinName pin);
  50 void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value);
  51 void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value);
  52
  53 #ifdef __cplusplus
  54 }
  55 #endif
  56
  57 #endif