+++ /dev/null
-/*
- * Copyright (c) 2008, Titanium Mirror, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * - 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.
- * - Neither the name of the Technische Universität Berlin 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
- * OWNER 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.
- */
-
-/**
- * Implement an open drain output using a GeneralIO, represented as a
- * GeneralIO. clr() puts the pin in input mode, simulating open drain and
- * therefore requiring a pull-up on the net. set() puts the pin in output
- * mode and sinks current by outputting a logic zero. By definition, the
- * pin wrapped by this component can only be used as an output.
- *
- * TODO: there could be a version of this component that uses the msp430's
- * built-in pull-up resistor...
- *
- * @author R. Steve McKown <rsmckown@gmail.com>
- */
-
-generic module OpenDrainP()
-{
- provides {
- interface Init;
- interface GeneralIO;
- }
- uses interface GeneralIO as RawIO;
-}
-implementation
-{
- command error_t Init.init()
- {
- call RawIO.clr();
- call RawIO.makeInput();
- return SUCCESS;
- }
-
- async command bool GeneralIO.get()
- {
- return call RawIO.get();
- }
-
- async command void GeneralIO.set()
- {
- call RawIO.makeInput();
- }
-
- async command void GeneralIO.clr()
- {
- call RawIO.makeOutput();
- }
-
- async command void GeneralIO.toggle()
- {
- if (call RawIO.isInput())
- call RawIO.makeOutput();
- else
- call RawIO.makeInput();
- }
-
- async command void GeneralIO.makeInput() {}
-
- async command void GeneralIO.makeOutput() {}
-
- async command bool GeneralIO.isInput()
- {
- return FALSE;
- }
-
- async command bool GeneralIO.isOutput()
- {
- return TRUE;
- }
-}
-