hpluartm.nc

Zigbee的nesc源码

// $Id: HPLUARTM.nc,v 1.5 2003/10/07 21:46:28 idgay Exp $

/*									tab:4
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 * two paragraphs and the author appear in all copies of this software.
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 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
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 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */
/*
 *
 * Authors:		Jason Hill, David Gay, Philip Levis
 * Date last modified:  $Id: HPLUARTM.nc,v 1.5 2003/10/07 21:46:28 idgay Exp $
 *
 */

// The hardware presentation layer. 

// The model is that HPL is stateless. If the desired interface is as stateless
// it can be implemented here (Clock, FlashBitSPI). Otherwise you should
// create a separate component


/**
 * @author Jason Hill
 * @author David Gay
 * @author Philip Levis
 */
module HPLUARTM {
  provides interface HPLUART as UART;

}
implementation
{
  async command result_t UART.init() {
    outp(12, UBRR);
    inp(UDR); 
    outp(0xd8,UCR);
    TOSH_SET_UART_RXD0_PIN();

    return SUCCESS;
  }

  async command result_t UART.stop() {
      outp(0x00, UCR);
      return SUCCESS;
  }

  default async event result_t UART.get(uint8_t data) { return SUCCESS; }
  TOSH_SIGNAL(SIG_UART_RECV) {
    if (inp(USR) & 0x80)
      signal UART.get(inp(UDR));
  }

  default event async result_t UART.putDone() { return SUCCESS; }
  TOSH_INTERRUPT(SIG_UART_TRANS) {
    signal UART.putDone();
  }

  command async result_t UART.put(uint8_t data) {
    sbi(USR, TXC);
    outp(data, UDR); 
    return SUCCESS;
  }
}