nes-proj/cpu/cc2538/slip-arch.c
Benoît Thébaudeau d93d129da6 cc2538: uart: Make it possible to use several UARTs simultaneously
This avoids the limitation of having a single UART available at runtime, without
duplicating code.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2014-04-17 18:53:44 +02:00

87 lines
2.9 KiB
C

/*
* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \addtogroup cc2538-char-io
* @{
*
* \file
* Arch-specific SLIP functions for the cc2538
*
* SLIP can be configured to operate over UART or over USB-Serial, depending
* on the value of SLIP_ARCH_CONF_USB
*/
#include "contiki-conf.h"
#include "dev/slip.h"
#include "dev/uart.h"
#include "usb/usb-serial.h"
#ifndef SLIP_ARCH_CONF_USB
#define SLIP_ARCH_CONF_USB 0
#endif
#if SLIP_ARCH_CONF_USB
#define write_byte(b) usb_serial_writeb(b)
#define set_input(f) usb_serial_set_input(f)
#define flush() usb_serial_flush()
#else
#define write_byte(b) uart_write_byte(SLIP_ARCH_CONF_UART, b)
#define set_input(f) uart_set_input(SLIP_ARCH_CONF_UART, f)
#define flush()
#endif
#define SLIP_END 0300
/*---------------------------------------------------------------------------*/
/**
* \brief Write a byte over SLIP
* \param c the byte
*/
void
slip_arch_writeb(unsigned char c)
{
write_byte(c);
if(c == SLIP_END) {
flush();
}
}
/*---------------------------------------------------------------------------*/
/**
* \brief Initialise the arch-specific SLIP driver
* \param ubr Ignored for the cc2538
*/
void
slip_arch_init(unsigned long ubr)
{
set_input(slip_input_byte);
}
/*---------------------------------------------------------------------------*/
/** @} */