tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4XX/gpio_object.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_OBJECT_H
  17 #define MBED_GPIO_OBJECT_H
  18
  19 #include "mbed_assert.h"
  20
  21 #ifdef __cplusplus
  22 extern "C" {
  23 #endif
  24
  25 typedef struct {
  26     PinName  pin;
  27     uint32_t mask;
  28
  29     __IO uint32_t *reg_mode;
  30     __IO uint16_t *reg_set;
  31     __IO uint16_t *reg_clr;
  32     __I  uint32_t *reg_in;
  33     __O  uint32_t *reg_out;
  34 } gpio_t;
  35
  36 static inline void gpio_write(gpio_t *obj, int value) {
  37     MBED_ASSERT(obj->pin != (PinName)NC);
  38     if (value)
  39         *obj->reg_set = obj->mask;
  40     else
  41         *obj->reg_clr = obj->mask;
  42 }
  43
  44 static inline int gpio_read(gpio_t *obj) {
  45     MBED_ASSERT(obj->pin != (PinName)NC);
  46     return ((*obj->reg_in & obj->mask) ? 1 : 0);
  47 }
  48
  49 static inline int gpio_is_connected(const gpio_t *obj) {
  50     return obj->pin != (PinName)NC;
  51 }
  52
  53 #ifdef __cplusplus
  54 }
  55 #endif
  56
  57 #endif