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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

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mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

TARGET_NUCLEO_F401RE/TARGET_STM/gpio_object.h@160:5571c4ff569f, 2018-01-17 (annotated)

Committer:
Anna Bridge
Date:
Wed Jan 17 16:13:02 2018 +0000
Revision:
160:5571c4ff569f
Parent:
156:ff21514d8981 
mbed library. Release version 158

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 156:ff21514d8981 1 /* mbed Microcontroller Library
AnnaBridge 156:ff21514d8981 2 *******************************************************************************
AnnaBridge 156:ff21514d8981 3 * Copyright (c) 2016, STMicroelectronics
AnnaBridge 156:ff21514d8981 4 * All rights reserved.
AnnaBridge 156:ff21514d8981 5 *
AnnaBridge 156:ff21514d8981 6 * Redistribution and use in source and binary forms, with or without
AnnaBridge 156:ff21514d8981 7 * modification, are permitted provided that the following conditions are met:
AnnaBridge 156:ff21514d8981 8 *
AnnaBridge 156:ff21514d8981 9 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 156:ff21514d8981 10 * this list of conditions and the following disclaimer.
AnnaBridge 156:ff21514d8981 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 156:ff21514d8981 12 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 156:ff21514d8981 13 * and/or other materials provided with the distribution.
AnnaBridge 156:ff21514d8981 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 156:ff21514d8981 15 * may be used to endorse or promote products derived from this software
AnnaBridge 156:ff21514d8981 16 * without specific prior written permission.
AnnaBridge 156:ff21514d8981 17 *
AnnaBridge 156:ff21514d8981 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 156:ff21514d8981 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 156:ff21514d8981 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 156:ff21514d8981 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 156:ff21514d8981 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 156:ff21514d8981 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 156:ff21514d8981 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 156:ff21514d8981 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 156:ff21514d8981 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 156:ff21514d8981 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 156:ff21514d8981 28 *******************************************************************************
AnnaBridge 156:ff21514d8981 29 */
AnnaBridge 156:ff21514d8981 30 #ifndef MBED_GPIO_OBJECT_H
AnnaBridge 156:ff21514d8981 31 #define MBED_GPIO_OBJECT_H
AnnaBridge 156:ff21514d8981 32
AnnaBridge 156:ff21514d8981 33 #include "mbed_assert.h"
AnnaBridge 156:ff21514d8981 34 #include "cmsis.h"
AnnaBridge 156:ff21514d8981 35 #include "PortNames.h"
AnnaBridge 156:ff21514d8981 36 #include "PeripheralNames.h"
AnnaBridge 156:ff21514d8981 37 #include "PinNames.h"
AnnaBridge 156:ff21514d8981 38
AnnaBridge 156:ff21514d8981 39 #ifdef __cplusplus
AnnaBridge 156:ff21514d8981 40 extern "C" {
AnnaBridge 156:ff21514d8981 41 #endif
AnnaBridge 156:ff21514d8981 42
AnnaBridge 156:ff21514d8981 43 /*
AnnaBridge 156:ff21514d8981 44 * Note: reg_clr might actually be same as reg_set.
AnnaBridge 156:ff21514d8981 45 * Depends on family whether BRR is available on top of BSRR
AnnaBridge 156:ff21514d8981 46 * if BRR does not exist, family shall define GPIO_IP_WITHOUT_BRR
AnnaBridge 156:ff21514d8981 47 */
AnnaBridge 156:ff21514d8981 48 typedef struct {
AnnaBridge 156:ff21514d8981 49 uint32_t mask;
AnnaBridge 156:ff21514d8981 50 __IO uint32_t *reg_in;
AnnaBridge 156:ff21514d8981 51 __IO uint32_t *reg_set;
AnnaBridge 156:ff21514d8981 52 __IO uint32_t *reg_clr;
AnnaBridge 156:ff21514d8981 53 PinName pin;
AnnaBridge 156:ff21514d8981 54 GPIO_TypeDef *gpio;
AnnaBridge 156:ff21514d8981 55 uint32_t ll_pin;
AnnaBridge 156:ff21514d8981 56 } gpio_t;
AnnaBridge 156:ff21514d8981 57
AnnaBridge 156:ff21514d8981 58 static inline void gpio_write(gpio_t *obj, int value)
AnnaBridge 156:ff21514d8981 59 {
AnnaBridge 156:ff21514d8981 60 if (value) {
AnnaBridge 156:ff21514d8981 61 *obj->reg_set = obj->mask;
AnnaBridge 156:ff21514d8981 62 } else {
AnnaBridge 156:ff21514d8981 63 #ifdef GPIO_IP_WITHOUT_BRR
AnnaBridge 156:ff21514d8981 64 *obj->reg_clr = obj->mask << 16;
AnnaBridge 156:ff21514d8981 65 #else
AnnaBridge 156:ff21514d8981 66 *obj->reg_clr = obj->mask;
AnnaBridge 156:ff21514d8981 67 #endif
AnnaBridge 156:ff21514d8981 68 }
AnnaBridge 156:ff21514d8981 69 }
AnnaBridge 156:ff21514d8981 70
AnnaBridge 156:ff21514d8981 71 static inline int gpio_read(gpio_t *obj)
AnnaBridge 156:ff21514d8981 72 {
AnnaBridge 156:ff21514d8981 73 return ((*obj->reg_in & obj->mask) ? 1 : 0);
AnnaBridge 156:ff21514d8981 74 }
AnnaBridge 156:ff21514d8981 75
AnnaBridge 156:ff21514d8981 76 static inline int gpio_is_connected(const gpio_t *obj)
AnnaBridge 156:ff21514d8981 77 {
AnnaBridge 156:ff21514d8981 78 return obj->pin != (PinName)NC;
AnnaBridge 156:ff21514d8981 79 }
AnnaBridge 156:ff21514d8981 80
AnnaBridge 156:ff21514d8981 81
AnnaBridge 156:ff21514d8981 82 #ifdef __cplusplus
AnnaBridge 156:ff21514d8981 83 }
AnnaBridge 156:ff21514d8981 84 #endif
AnnaBridge 156:ff21514d8981 85
AnnaBridge 156:ff21514d8981 86 #endif