tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC408X/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_dir;
  30     __IO uint32_t *reg_set;
  31     __IO uint32_t *reg_clr;
  32     __I  uint32_t *reg_in;
  33 } gpio_t;
  34
  35 static inline void gpio_write(gpio_t *obj, int value) {
  36     MBED_ASSERT(obj->pin != (PinName)NC);
  37     if (value)
  38         *obj->reg_set = obj->mask;
  39     else
  40         *obj->reg_clr = obj->mask;
  41 }
  42
  43 static inline int gpio_read(gpio_t *obj) {
  44     MBED_ASSERT(obj->pin != (PinName)NC);
  45     return ((*obj->reg_in & obj->mask) ? 1 : 0);
  46 }
  47
  48 static inline int gpio_is_connected(const gpio_t *obj) {
  49     return obj->pin != (PinName)NC;
  50 }
  51
  52 #ifdef __cplusplus
  53 }
  54 #endif
  55
  56 #endif