mirror of https://github.com/ARMmbed/mbed-os.git
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* 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.
|
|
*/
|
|
#ifndef MBED_GPIO_OBJECT_H
|
|
#define MBED_GPIO_OBJECT_H
|
|
|
|
#include "mbed_assert.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct {
|
|
PinName pin;
|
|
uint32_t mask;
|
|
|
|
__IO uint32_t *reg_dir;
|
|
__IO uint32_t *reg_set;
|
|
__I uint32_t *reg_in;
|
|
__IO uint32_t *reg_buf;
|
|
} gpio_t;
|
|
|
|
static inline void gpio_write(gpio_t *obj, int value) {
|
|
*obj->reg_set = (obj->mask << 16) | ((value != 0) ? obj->mask : 0);
|
|
}
|
|
|
|
static inline int gpio_read(gpio_t *obj) {
|
|
return ((*obj->reg_in & obj->mask) ? 1 : 0);
|
|
}
|
|
|
|
static inline int gpio_is_connected(const gpio_t *obj) {
|
|
return obj->pin != (PinName)NC;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|