mica2-humidity.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)


#include "mos.h"

#if defined(PLATFORM_MICA_ANY)

#include "mica2-humidity.h"
#include "avr-i2c.h"
#include "dev.h"
#include "mutex.h"

#if defined(MICA2_HUMIDITY) || !defined(SCONS)

mos_mutex_t humidity_mutex;
uint8_t powered;
static uint8_t mode;

static void mica2_humidity_on(void)
{
   uint8_t i;
   i = HUMIDITY_PIN_MASK;

   dev_ioctl(DEV_AVR_I2C, I2C_SET_BRR, HUMIDITY_CLOCK);
   
   dev_ioctl(DEV_AVR_I2C, I2C_DEST_ADDR, HUMIDITY_POWER_ADDR);
   dev_write(DEV_AVR_I2C, &i, sizeof(i));   
}

static void mica2_humidity_off(void)
{
   uint8_t i;
   i = ~(HUMIDITY_PIN_MASK);
   
   dev_ioctl(DEV_AVR_I2C, I2C_DEST_ADDR, HUMIDITY_POWER_ADDR);
   dev_write(DEV_AVR_I2C, &i, sizeof(i));
}

uint8_t dev_read_DEV_MICA2_HUMIDITY(void *buf, uint16_t count)
{
   avr_i2c_init();
   
   if(mode == DEV_MODE_OFF)
      mica2_humidity_on();

   dev_ioctl(DEV_AVR_I2C, I2C_DEST_ADDR, HUMIDITY_DATA_ADDR);
   dev_read(DEV_AVR_I2C, (uint8_t *)buf, count);
   
   if(mode == DEV_MODE_OFF)
      mica2_humidity_off();
   
   return count;
}

uint8_t dev_write_DEV_MICA2_HUMIDITY(void *buf, uint16_t count)
{
   return DEV_UNSUPPORTED;
}

uint8_t dev_ioctl_DEV_MICA2_HUMIDITY(int8_t request, ...)
{
   return DEV_BAD_IOCTL;
}

void mica2_humidity_init(void)
{
   mica2_humidity_off();
   powered = DEV_MODE_OFF;
   mos_mutex_init(&humidity_mutex);
}

#endif
#endif