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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_L496ZG_P/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:
158:1c57384330a6 
mbed library. Release version 158

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 158:1c57384330a6 1 /* mbed Microcontroller Library
AnnaBridge 158:1c57384330a6 2 *******************************************************************************
AnnaBridge 158:1c57384330a6 3 * Copyright (c) 2016, STMicroelectronics
AnnaBridge 158:1c57384330a6 4 * All rights reserved.
AnnaBridge 158:1c57384330a6 5 *
AnnaBridge 158:1c57384330a6 6 * Redistribution and use in source and binary forms, with or without
AnnaBridge 158:1c57384330a6 7 * modification, are permitted provided that the following conditions are met:
AnnaBridge 158:1c57384330a6 8 *
AnnaBridge 158:1c57384330a6 9 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 158:1c57384330a6 10 * this list of conditions and the following disclaimer.
AnnaBridge 158:1c57384330a6 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 158:1c57384330a6 12 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 158:1c57384330a6 13 * and/or other materials provided with the distribution.
AnnaBridge 158:1c57384330a6 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 158:1c57384330a6 15 * may be used to endorse or promote products derived from this software
AnnaBridge 158:1c57384330a6 16 * without specific prior written permission.
AnnaBridge 158:1c57384330a6 17 *
AnnaBridge 158:1c57384330a6 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 158:1c57384330a6 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 158:1c57384330a6 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 158:1c57384330a6 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 158:1c57384330a6 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 158:1c57384330a6 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 158:1c57384330a6 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 158:1c57384330a6 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 158:1c57384330a6 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 158:1c57384330a6 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 158:1c57384330a6 28 *******************************************************************************
AnnaBridge 158:1c57384330a6 29 */
AnnaBridge 158:1c57384330a6 30 #ifndef MBED_GPIO_OBJECT_H
AnnaBridge 158:1c57384330a6 31 #define MBED_GPIO_OBJECT_H
AnnaBridge 158:1c57384330a6 32
AnnaBridge 158:1c57384330a6 33 #include "mbed_assert.h"
AnnaBridge 158:1c57384330a6 34 #include "cmsis.h"
AnnaBridge 158:1c57384330a6 35 #include "PortNames.h"
AnnaBridge 158:1c57384330a6 36 #include "PeripheralNames.h"
AnnaBridge 158:1c57384330a6 37 #include "PinNames.h"
AnnaBridge 158:1c57384330a6 38
AnnaBridge 158:1c57384330a6 39 #ifdef __cplusplus
AnnaBridge 158:1c57384330a6 40 extern "C" {
AnnaBridge 158:1c57384330a6 41 #endif
AnnaBridge 158:1c57384330a6 42
AnnaBridge 158:1c57384330a6 43 /*
AnnaBridge 158:1c57384330a6 44 * Note: reg_clr might actually be same as reg_set.
AnnaBridge 158:1c57384330a6 45 * Depends on family whether BRR is available on top of BSRR
AnnaBridge 158:1c57384330a6 46 * if BRR does not exist, family shall define GPIO_IP_WITHOUT_BRR
AnnaBridge 158:1c57384330a6 47 */
AnnaBridge 158:1c57384330a6 48 typedef struct {
AnnaBridge 158:1c57384330a6 49 uint32_t mask;
AnnaBridge 158:1c57384330a6 50 __IO uint32_t *reg_in;
AnnaBridge 158:1c57384330a6 51 __IO uint32_t *reg_set;
AnnaBridge 158:1c57384330a6 52 __IO uint32_t *reg_clr;
AnnaBridge 158:1c57384330a6 53 PinName pin;
AnnaBridge 158:1c57384330a6 54 GPIO_TypeDef *gpio;
AnnaBridge 158:1c57384330a6 55 uint32_t ll_pin;
AnnaBridge 158:1c57384330a6 56 } gpio_t;
AnnaBridge 158:1c57384330a6 57
AnnaBridge 158:1c57384330a6 58 static inline void gpio_write(gpio_t *obj, int value)
AnnaBridge 158:1c57384330a6 59 {
AnnaBridge 158:1c57384330a6 60 if (value) {
AnnaBridge 158:1c57384330a6 61 *obj->reg_set = obj->mask;
AnnaBridge 158:1c57384330a6 62 } else {
AnnaBridge 158:1c57384330a6 63 #ifdef GPIO_IP_WITHOUT_BRR
AnnaBridge 158:1c57384330a6 64 *obj->reg_clr = obj->mask << 16;
AnnaBridge 158:1c57384330a6 65 #else
AnnaBridge 158:1c57384330a6 66 *obj->reg_clr = obj->mask;
AnnaBridge 158:1c57384330a6 67 #endif
AnnaBridge 158:1c57384330a6 68 }
AnnaBridge 158:1c57384330a6 69 }
AnnaBridge 158:1c57384330a6 70
AnnaBridge 158:1c57384330a6 71 static inline int gpio_read(gpio_t *obj)
AnnaBridge 158:1c57384330a6 72 {
AnnaBridge 158:1c57384330a6 73 return ((*obj->reg_in & obj->mask) ? 1 : 0);
AnnaBridge 158:1c57384330a6 74 }
AnnaBridge 158:1c57384330a6 75
AnnaBridge 158:1c57384330a6 76 static inline int gpio_is_connected(const gpio_t *obj)
AnnaBridge 158:1c57384330a6 77 {
AnnaBridge 158:1c57384330a6 78 return obj->pin != (PinName)NC;
AnnaBridge 158:1c57384330a6 79 }
AnnaBridge 158:1c57384330a6 80
AnnaBridge 158:1c57384330a6 81
AnnaBridge 158:1c57384330a6 82 #ifdef __cplusplus
AnnaBridge 158:1c57384330a6 83 }
AnnaBridge 158:1c57384330a6 84 #endif
AnnaBridge 158:1c57384330a6 85
AnnaBridge 158:1c57384330a6 86 #endif