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62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/**
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* @file gpio.c
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* Abstracts gpio access, makes things easier
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*
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* Copyright (C) 2018 Clyne Sullivan
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <gpio.h>
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void gpio_init(void)
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{
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// enable clocks
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RCC->AHB2ENR |= 0xFF;
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}
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void gpio_pupd(GPIO_TypeDef *port, uint8_t pin, uint8_t pupd)
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{
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port->PUPDR &= ~(0x03 << (2 * pin));
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port->PUPDR |= pupd << (2 * pin);
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}
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void gpio_speed(GPIO_TypeDef *port, uint8_t pin, uint8_t speed)
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{
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port->OSPEEDR &= ~(0x03 << (2 * pin));
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port->OSPEEDR |= speed << (2 * pin);
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}
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void gpio_type(GPIO_TypeDef *port, uint8_t pin, uint8_t type)
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{
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port->OTYPER &= ~(1 << pin);
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port->OTYPER |= type << pin;
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}
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void gpio_mode(GPIO_TypeDef *port, uint8_t pin, uint8_t mode)
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{
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port->MODER &= ~(0x03 << (2 * pin));
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port->MODER |= mode << (2 * pin);
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}
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void gpio_dout(GPIO_TypeDef *port, uint8_t pin, uint8_t val)
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{
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port->BSRR |= (1 << (val ? pin : pin + 16));
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}
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uint8_t gpio_din(GPIO_TypeDef *port, uint8_t pin)
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{
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return port->IDR & (1 << pin);
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}
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