mica2-sounder.c

MANTIS是由科罗拉多大学开发的传感器网络嵌入式操作系统。 这是mantis的0.9.5版本的源码。

//  This file is part of MANTIS OS, Operating System
//  See http://mantis.cs.colorado.edu/
//
//  Copyright (C) 2003,2004,2005 University of Colorado, Boulder
//
//  This program is free software; you can redistribute it and/or
//  modify it under the terms of the mos license (see file LICENSE)

#define SOUNDER_PORT PORTC
#define SOUNDER_MASK (1 << 2)
#define SOUNDER_DIRE DDRC

#include "mos.h"

#if defined(PLATFORM_MICA_ANY)

#include "dev.h"
#include "mica2-sounder.h"
#include "mutex.h"

#if defined(MICA2_SOUNDER) || !defined(SCONS)

mos_mutex_t sounder_mutex;

static void mica2_sounder_on(void)
{
   SOUNDER_DIRE |= SOUNDER_MASK;
   SOUNDER_PORT &= ~SOUNDER_MASK;
   SOUNDER_PORT |= SOUNDER_MASK;
}

static void mica2_sounder_off(void)
{
   SOUNDER_PORT &= ~(SOUNDER_MASK);
   SOUNDER_DIRE &= ~(SOUNDER_MASK);
} 

/*write 0 to sounder to turn off, other numbers to turn on*/
uint16_t dev_write_DEV_MICA2_SOUNDER(const void *buf, uint16_t count)
{
   if(((uint8_t *)buf)[0] == 0)
      mica2_sounder_off();
   else
      mica2_sounder_on();

   return count;
}

uint16_t dev_read_DEV_MICA2_SOUNDER(void *buf, uint16_t count)
{
   return DEV_UNSUPPORTED;
}

uint8_t dev_mode_DEV_MICA2_SOUNDER(uint8_t md)
{
   return DEV_UNSUPPORTED;
}

uint8_t dev_ioctl_DEV_MICA2_SOUNDER(int8_t request, ...)
{
   return DEV_BAD_IOCTL;
}

void mica2_sounder_init(void)
{
   mos_mutex_init(&sounder_mutex);
   mica2_sounder_off();
}

#endif
#endif