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https://github.com/RIOT-OS/RIOT.git
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ba26aed107
Moved macros and static inline helper functions needed to access ATmega GPIOs to cpu/atmega_common/include/atmega_gpio.h in order to reuse them for the platform specific low level part of the Neopixel driver.
103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
/*
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* Copyright (C) 2015 HAW Hamburg
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* 2016 INRIA
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_atmega_common
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* @ingroup drivers_periph_gpio
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* @{
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*
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* @file
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* @brief Macros and inline functions for accessing GPIOs of the ATmega
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* family
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*
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* @author René Herthel <rene-herthel@outlook.de>
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* @author Francisco Acosta <francisco.acosta@inria.fr>
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* @author Laurent Navet <laurent.navet@gmail.com>
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*/
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#ifndef ATMEGA_GPIO_H
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#define ATMEGA_GPIO_H
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#include <stdio.h>
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#include <avr/interrupt.h>
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#include "cpu.h"
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#include "board.h"
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#include "periph/gpio.h"
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#include "periph_conf.h"
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#include "periph_cpu.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ATMEGA_GPIO_BASE_PORT_A (0x20)
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#define ATMEGA_GPIO_OFFSET_PORT_H (0xCB)
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#define ATMEGA_GPIO_OFFSET_PIN_PORT (0x02)
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#define ATMEGA_GPIO_OFFSET_PIN_PIN (0x03)
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/**
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* @brief Extract the pin number of the given pin
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*/
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static inline uint8_t atmega_pin_num(gpio_t pin)
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{
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return (pin & 0x0f);
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}
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/**
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* @brief Extract the port number of the given pin
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*/
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static inline uint8_t atmega_port_num(gpio_t pin)
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{
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return (pin >> 4) & 0x0f;
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}
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/**
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* @brief Generate the PORTx address of the give pin.
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*/
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static inline uint16_t atmega_port_addr(gpio_t pin)
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{
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uint8_t port_num = atmega_port_num(pin);
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uint16_t port_addr = port_num * ATMEGA_GPIO_OFFSET_PIN_PIN;
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port_addr += ATMEGA_GPIO_BASE_PORT_A;
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port_addr += ATMEGA_GPIO_OFFSET_PIN_PORT;
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#if defined (PORTG)
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if (port_num > PORT_G) {
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port_addr += ATMEGA_GPIO_OFFSET_PORT_H;
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}
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#endif
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return port_addr;
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}
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/**
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* @brief Generate the DDRx address of the given pin
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*/
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static inline uint16_t atmega_ddr_addr(gpio_t pin)
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{
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return (atmega_port_addr(pin) - 0x01);
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}
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/**
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* @brief Generate the PINx address of the given pin.
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*/
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static inline uint16_t atmega_pin_addr(gpio_t pin)
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{
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return (atmega_port_addr(pin) - 0x02);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* ATMEGA_GPIO_H */
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/** @} */
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