mirror of https://github.com/ARMmbed/mbed-os.git
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/* mbed Microcontroller Library
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*******************************************************************************
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* Copyright (c) 2016, STMicroelectronics
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************
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*/
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#ifndef MBED_GPIO_OBJECT_H
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#define MBED_GPIO_OBJECT_H
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#include "mbed_assert.h"
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#include "cmsis.h"
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#include "PortNames.h"
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#include "PeripheralNames.h"
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#include "PinNames.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Note: reg_clr might actually be same as reg_set.
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* Depends on family whether BRR is available on top of BSRR
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* if BRR does not exist, family shall define GPIO_IP_WITHOUT_BRR
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*/
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typedef struct {
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uint32_t mask;
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__IO uint32_t *reg_in;
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__IO uint32_t *reg_set;
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__IO uint32_t *reg_clr;
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PinName pin;
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GPIO_TypeDef *gpio;
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uint32_t ll_pin;
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} gpio_t;
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static inline void gpio_write(gpio_t *obj, int value)
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{
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if (value) {
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*obj->reg_set = obj->mask;
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} else {
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#ifdef GPIO_IP_WITHOUT_BRR
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*obj->reg_clr = obj->mask << 16;
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#else
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*obj->reg_clr = obj->mask;
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#endif
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}
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}
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static inline int gpio_read(gpio_t *obj)
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{
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return ((*obj->reg_in & obj->mask) ? 1 : 0);
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}
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static inline int gpio_is_connected(const gpio_t *obj)
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{
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return obj->pin != (PinName)NC;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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