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/****************************************************************************
**
** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of Qbs.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "gpio.h"
#include "system.h"
#define GPIO_BLUE_LED_PIN_POS (15u)
#define GPIO_BLUE_LED_PIN (1u << GPIO_BLUE_LED_PIN_POS)
// Output push pull mode.
#define GPIO_MODE_OUTPUT_PP (0x00000001u)
// Bit definition for RCC_AHB1ENR register.
#define RCC_AHB1ENR_GPIODEN (0x00000008u)
// Bits definition for GPIO_MODER register.
#define GPIO_MODER_MODE0 (0x00000003u)
void gpio_init_blue_led(void)
{
// Enable RCC clock on GPIOD port.
RCC_REGS_MAP->AHB1ENR |= RCC_AHB1ENR_GPIODEN;
// Configure GPIO pin #15 as an output.
uint32_t value = GPIOD_REGS_MAP->MODER;
value &= ~(GPIO_MODER_MODE0 << (GPIO_BLUE_LED_PIN_POS * 2u));
value |= (GPIO_MODE_OUTPUT_PP << (GPIO_BLUE_LED_PIN_POS * 2u));
GPIOD_REGS_MAP->MODER = value;
}
void gpio_toggle_blue_led(void)
{
GPIOD_REGS_MAP->ODR ^= GPIO_BLUE_LED_PIN;
}
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