2012-01-18 15:27:59 +00:00
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/*
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* Copyright (c) 2006, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)$Id: spix.c,v 1.1 2010/08/24 16:23:20 joxe Exp $
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*/
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#include "contiki-conf.h"
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/*
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* This is SPI initialization code for the MSP430X architecture.
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*
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*/
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2012-03-08 21:39:53 +00:00
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/* unsigned char spi_busy = 0; */
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2012-01-18 15:27:59 +00:00
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/*---------------------------------------------------------------------------*/
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/*
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* Initialize SPI bus.
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*/
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void
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spi_init(void)
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{
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/* Initalize ports for communication with SPI units. */
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UCB0CTL1 |= UCSWRST; /* Reset USCI */
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UCB0CTL1 |= UCSSEL_2; /* smclk while usci is reset */
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/* MSB-first 8-bit, Master, Synchronous, 3 pin SPI master, no ste,
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watch-out for clock-phase UCCKPH */
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UCB0CTL0 = (UCMSB | UCMST | UCSYNC | UCCKPL);
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/* Set up SPI bus speed. */
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UCB0BR1 = 0x00;
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UCB0BR0 = 0x01;
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/* Dont need modulation control. */
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/* UCB0MCTL = 0; */
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/* Select Peripheral functionality */
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P3SEL |= BV(SCK) | BV(MOSI) | BV(MISO);
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/* Configure as outputs(SIMO,CLK). */
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P3DIR |= BV(SCK) | BV(MISO);
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/* Clear pending interrupts before enabling. */
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UCB0IE &= ~UCRXIFG;
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UCB0IE &= ~UCTXIFG;
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/* Remove RESET before enabling interrupts */
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UCB0CTL1 &= ~UCSWRST;
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/* Enable UCB0 Interrupts */
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/* Enable USCI_B0 TX Interrupts */
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/* IE2 |= UCB0TXIE; */
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/* Enable USCI_B0 RX Interrupts */
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/* IE2 |= UCB0RXIE; */
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}
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/*---------------------------------------------------------------------------*/
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