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reseau statique a...
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/*
* Copyright (C) 2015-2016 Freie Universitรคt 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_samd21
* @{
*
* @file
* @brief CPU specific definitions for internal peripheral handling
*
* @author Hauke Petersen <hauke.peterse@fu-berlin.de>
*/
#ifndef CPU_PERIPH_H
#define CPU_PERIPH_H
#include "periph_cpu_common.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Available ports on the SAMD21
*/
enum {
PA = 0, /**< port A */
PB = 1, /**< port B */
PC = 2, /**< port C */
};
/**
* @brief Generate GPIO mode bitfields
*
* We use 3 bit to determine the pin functions:
* - bit 0: PD(0) or PU(1)
* - 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 */
/**
* @brief PWM channel configuration data structure
*/
typedef struct {
gpio_t pin; /**< GPIO pin */
gpio_mux_t mux; /**< pin function multiplex value */
uint8_t chan; /**< TCC channel to use */
} pwm_conf_chan_t;
/**
* @brief PWM device configuration data structure
*/
typedef struct {
Tcc *dev; /**< TCC device to use */
pwm_conf_chan_t chan[3]; /**< channel configuration */
} pwm_conf_t;
/**
* @brief UART device configuration
*/
typedef struct {
SercomUsart *dev; /**< pointer to the used UART device */
gpio_t rx_pin; /**< pin used for RX */
gpio_t tx_pin; /**< pin used for TX */
gpio_mux_t mux; /**< alternative function for pins */
uart_rxpad_t rx_pad; /**< pad selection for RX line */
uart_txpad_t tx_pad; /**< pad selection for TX line */
} uart_conf_t;
/**
* @brief Return the numeric id of a SERCOM device derived from its address
*
* @param[in] sercom SERCOM device
*
* @return numeric id of the given SERCOM device
*/
static inline int _sercom_id(SercomUsart *sercom)
{
return ((((uint32_t)sercom) >> 10) & 0x7) - 2;
}
#ifdef __cplusplus
}
#endif
#endif /* CPU_PERIPH_H */
/** @} */
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