Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_STM/TARGET_STM32L1/gpio_object.h@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 *******************************************************************************
elessair 0:f269e3021894 3 * Copyright (c) 2014, STMicroelectronics
elessair 0:f269e3021894 4 * All rights reserved.
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * Redistribution and use in source and binary forms, with or without
elessair 0:f269e3021894 7 * modification, are permitted provided that the following conditions are met:
elessair 0:f269e3021894 8 *
elessair 0:f269e3021894 9 * 1. Redistributions of source code must retain the above copyright notice,
elessair 0:f269e3021894 10 * this list of conditions and the following disclaimer.
elessair 0:f269e3021894 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
elessair 0:f269e3021894 12 * this list of conditions and the following disclaimer in the documentation
elessair 0:f269e3021894 13 * and/or other materials provided with the distribution.
elessair 0:f269e3021894 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
elessair 0:f269e3021894 15 * may be used to endorse or promote products derived from this software
elessair 0:f269e3021894 16 * without specific prior written permission.
elessair 0:f269e3021894 17 *
elessair 0:f269e3021894 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
elessair 0:f269e3021894 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
elessair 0:f269e3021894 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
elessair 0:f269e3021894 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
elessair 0:f269e3021894 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
elessair 0:f269e3021894 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
elessair 0:f269e3021894 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
elessair 0:f269e3021894 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
elessair 0:f269e3021894 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
elessair 0:f269e3021894 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
elessair 0:f269e3021894 28 *******************************************************************************
elessair 0:f269e3021894 29 */
elessair 0:f269e3021894 30 #ifndef MBED_GPIO_OBJECT_H
elessair 0:f269e3021894 31 #define MBED_GPIO_OBJECT_H
elessair 0:f269e3021894 32
elessair 0:f269e3021894 33 #include "mbed_assert.h"
elessair 0:f269e3021894 34 #include "cmsis.h"
elessair 0:f269e3021894 35 #include "PortNames.h"
elessair 0:f269e3021894 36 #include "PeripheralNames.h"
elessair 0:f269e3021894 37 #include "PinNames.h"
elessair 0:f269e3021894 38
elessair 0:f269e3021894 39 #ifdef __cplusplus
elessair 0:f269e3021894 40 extern "C" {
elessair 0:f269e3021894 41 #endif
elessair 0:f269e3021894 42
elessair 0:f269e3021894 43 typedef struct {
elessair 0:f269e3021894 44 PinName pin;
elessair 0:f269e3021894 45 uint32_t mask;
elessair 0:f269e3021894 46 __IO uint32_t *reg_in;
elessair 0:f269e3021894 47 __IO uint32_t *reg_set;
elessair 0:f269e3021894 48 __IO uint32_t *reg_clr;
elessair 0:f269e3021894 49 } gpio_t;
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 static inline void gpio_write(gpio_t *obj, int value)
elessair 0:f269e3021894 52 {
elessair 0:f269e3021894 53 MBED_ASSERT(obj->pin != (PinName)NC);
elessair 0:f269e3021894 54 if (value) {
elessair 0:f269e3021894 55 *obj->reg_set = obj->mask;
elessair 0:f269e3021894 56 } else {
elessair 0:f269e3021894 57 #if defined(TARGET_STM32L152RC) || defined(TARGET_STM32L151RC) || defined (TARGET_STM32L151CC)
elessair 0:f269e3021894 58 *obj->reg_set = obj->mask << 16;
elessair 0:f269e3021894 59 #else
elessair 0:f269e3021894 60 *obj->reg_clr = obj->mask;
elessair 0:f269e3021894 61 #endif
elessair 0:f269e3021894 62 }
elessair 0:f269e3021894 63 }
elessair 0:f269e3021894 64
elessair 0:f269e3021894 65 static inline int gpio_read(gpio_t *obj)
elessair 0:f269e3021894 66 {
elessair 0:f269e3021894 67 MBED_ASSERT(obj->pin != (PinName)NC);
elessair 0:f269e3021894 68 return ((*obj->reg_in & obj->mask) ? 1 : 0);
elessair 0:f269e3021894 69 }
elessair 0:f269e3021894 70
elessair 0:f269e3021894 71 static inline int gpio_is_connected(const gpio_t *obj) {
elessair 0:f269e3021894 72 return obj->pin != (PinName)NC;
elessair 0:f269e3021894 73 }
elessair 0:f269e3021894 74
elessair 0:f269e3021894 75 #ifdef __cplusplus
elessair 0:f269e3021894 76 }
elessair 0:f269e3021894 77 #endif
elessair 0:f269e3021894 78
elessair 0:f269e3021894 79 #endif