attrphotom.nc

用于传感器网络的节点操作系统 TinyOS 结构设计非常有意思

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/* 
 * Authors:  Wei Hong
 *           Intel Research Berkeley Lab
 * Date:     7/1/2002
 *
 */
// component to expose Photo sensor reading as an attribute
module AttrPhotoM
{
	provides interface StdControl;
	uses 
	{
		interface AttrRegister;
		interface ADC;
		interface StdControl as SubControl;
	}
}
implementation
{
	char *result;
	char *attrName;

	command result_t StdControl.init()
	{
	  call SubControl.init();
	  if (call AttrRegister.registerAttr("light", UINT16, 2) != SUCCESS)
			return FAIL;
		return SUCCESS;
	}

	command result_t StdControl.start()
	{
	  call SubControl.start();
	  return SUCCESS;
	}


	command result_t StdControl.stop()	  {
	  call SubControl.stop();
	  return SUCCESS;
	}

	event result_t AttrRegister.getAttr(char *name, char *resultBuf, SchemaErrorNo *errorNo)
	{
		result = resultBuf;
		attrName = name;
		if (call ADC.getData() != SUCCESS)
			return FAIL;
		*errorNo = SCHEMA_RESULT_PENDING;
		return SUCCESS;
	}

	event result_t ADC.dataReady(uint16_t data)
	{
		*(uint16_t*)result = data;
		call AttrRegister.getAttrDone(attrName, result, SCHEMA_RESULT_READY);
		return SUCCESS;
	}

	event result_t AttrRegister.setAttr(char *name, char *attrVal)
	{
		return FAIL;
	}
}