periph_cpu.h
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/*
* Copyright (C) 2015-2016 Freie Universität Berlin
*
* 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_saml21
* @{
*
* @file
* @brief CPU specific definitions for internal peripheral handling
*
* @author Hauke Petersen <hauke.peterse@fu-berlin.de>
*/
#ifndef PERIPH_CPU_H
#define PERIPH_CPU_H
#include "periph_cpu_common.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Available ports on the SAML21 for convenient access
*/
enum {
PA = 0, /**< port A */
PB = 1, /**< port B */
};
/**
* @brief Generate GPIO mode bitfields
*
* We use 3 bit to determine the pin functions:
* - bit 0: PU or PU
* - bit 1: input enable
* - bit 2: pull enable
*/
#define GPIO_MODE(pr, ie, pe) (pr | (ie << 1) | (pe << 2))
#ifndef DOXYGEN
/**
* @brief Override GPIO modes
* @{
*/
#define HAVE_GPIO_MODE_T
typedef enum {
GPIO_IN = GPIO_MODE(0, 1, 0), /**< IN */
GPIO_IN_PD = GPIO_MODE(0, 1, 1), /**< IN with pull-down */
GPIO_IN_PU = GPIO_MODE(1, 1, 1), /**< IN with pull-up */
GPIO_OUT = GPIO_MODE(0, 0, 0), /**< OUT (push-pull) */
GPIO_OD = 0xfe, /**< not supported by HW */
GPIO_OD_PU = 0xff /**< not supported by HW */
} gpio_mode_t;
/** @} */
#endif /* ndef DOXYGEN */
#ifdef __cplusplus
}
#endif
#endif /* PERIPH_CPU_H */
/** @} */