gpio_common.h 1.24 KiB
/*
* Copyright (C) 2018 Gunar Schorcht
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup cpu_esp8266
* @ingroup drivers_periph_gpio
* @{
*
* @file
* @brief Low-level GPIO driver implementation for ESP8266
*
* @author Gunar Schorcht <gunar@schorcht.net>
* @}
*/
#ifndef GPIO_COMMON_H
#define GPIO_COMMON_H
#ifdef __cplusplus
extern "C" {
#endif
/** Map of GPIO pin numbers to IOMUX pin numbers */
extern const uint8_t _gpio_to_iomux[];
/** Map of IOMUX pin numbers to GPIO pin numbers */
extern const uint8_t _iomux_to_gpio[];
/**
* @brief Definition of possible GPIO usage types
*/
typedef enum
{
_GPIO = 0, /**< pin used as standard GPIO */
_I2C, /**< pin used as I2C signal */
_PWM, /**< pin used as PWM output */
_SPI, /**< pin used as SPI interface */
_SPIF, /**< pin used as SPI flash interface */
_UART, /**< pin used as UART interface */
} _gpio_pin_usage_t;
/**
* Holds the usage type of each GPIO pin
*/
extern _gpio_pin_usage_t _gpio_pin_usage [GPIO_PIN_NUMOF];
#ifdef __cplusplus
}
#endif
#endif /* GPIO_COMMON_H */