tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11XX_11CXX/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     __I  uint32_t *reg_mask_read;
  28     __IO uint32_t *reg_dir;
  29     __IO uint32_t *reg_write;
  30 } gpio_t;
  31
  32 static inline void gpio_write(gpio_t *obj, int value) {
  33     MBED_ASSERT(obj->pin != (PinName)NC);
  34     uint32_t pin_number = ((obj->pin & 0x0F00) >> 8);
  35     if (value)
  36         *obj->reg_write |= (1 << pin_number);
  37     else
  38         *obj->reg_write &= ~(1 << pin_number);
  39 }
  40
  41 static inline int gpio_read(gpio_t *obj) {
  42     MBED_ASSERT(obj->pin != (PinName)NC);
  43     return ((*obj->reg_mask_read) ? 1 : 0);
  44 }
  45
  46 static inline int gpio_is_connected(const gpio_t *obj) {
  47     return obj->pin != (PinName)NC;
  48 }
  49
  50 #ifdef __cplusplus
  51 }
  52 #endif
  53
  54 #endif