cmx_interval.c

cypress cy3721做的外部无线结点。感知温度后将温度值反给中心结点。

//*****************************************************************************
//*****************************************************************************
//  FILENAME:  CMX_INTERVAL.c
//  Version: 1.1, Updated on 2008/6/23 at 14:8:8
//  
//
//  DESCRIPTION:  This file contains the C code for the INTERVAL driver.
//
//                Note:
//
//-----------------------------------------------------------------------------
//      Copyright (c) Cypress MicroSystems 2004. All Rights Reserved.
//*****************************************************************************
//*****************************************************************************

#include "m8c.h"
#include "PSoCAPI.h" 
#include "CMX_INTERVAL.h"
#include "cmx.h"
#include "SystemTimer.h"

WORD  			CMX_INTERVAL_StartTicks[CMX_INTERVAL_COUNT];
unsigned char  	CMX_INTERVAL_Status[CMX_INTERVAL_COUNT];

//-----------------------------------------------------------------------------
//  FUNCTION NAME: INTERVAL_Instantiate(const CMX_INTERVAL_ParameterBlock * thisBLK)
//
//  DESCRIPTION:  
//    This function initializes the INTERVAL timer. 
//
//-----------------------------------------------------------------------------
//
//  ARGUMENTS: 
//    thisBLK  => Pointer to ParameterBlock for this instance.
//
//  RETURNS: None
//
//  SIDE EFFECTS: 
//
//  THEORY of OPERATION or PROCEDURE: 
//
//-----------------------------------------------------------------------------
void CMX_INTERVAL_Instantiate(const CMX_INTERVAL_ParameterBlock * thisBLK)
{
   BYTE bInstance;

   bInstance = thisBLK->bInstance;                                          // Get Instance number
    
   CMX_INTERVAL_Status[bInstance] = 0;   
   CMX_INTERVAL_StartTicks[bInstance] = SystemTimer_iGetTickCntr();  // Reset ticks   
}

//-----------------------------------------------------------------------------
//  FUNCTION NAME: INTERVAL_GetValue(const CMX_INTERVAL_ParameterBlock * thisBLK)
//
//  DESCRIPTION:  
//    Adds the address given by bAddrOffset with the default address.
//
//-----------------------------------------------------------------------------
//
//  ARGUMENTS:  None
//     
//
//  RETURNS: 
//     Returns a 1 if timer has expired.
//
//  SIDE EFFECTS: 
//
//  THEORY of OPERATION or PROCEDURE: 
//
//-----------------------------------------------------------------------------
BYTE CMX_INTERVAL_GetValue(const CMX_INTERVAL_ParameterBlock * thisBLK)
{
    BYTE bInstance;                                              // Current INTERVAL instance
    BYTE bMode;                                                  // 0 = Pulse, 1 = Toggle
    BYTE bResult;
  
	bInstance = thisBLK->bInstance;                              // Get Instance of this INTERVAL.
    bMode = thisBLK->bMode;

    bResult = CMX_INTERVAL_Status[bInstance];            // Get last status
    
	if(((WORD)SystemTimer_iGetTickCntr() - CMX_INTERVAL_StartTicks[bInstance])>=thisBLK->iInterval)
	{
	    CMX_INTERVAL_StartTicks[bInstance] = SystemTimer_iGetTickCntr(); 
        if(bMode == 0) 
        {                                          // If pulse mode
           bResult = 1;                                           //   Set to 1
        } 
        else 
        {                                                  // Toggle mode
           bResult ^= 1;                                          //   Toggle output
        }
    } 
    else 
    {                                                     // Timer has not expired
        if(bMode == 0) 
        {                                          // Pulse mode?
           bResult = 0;                                           //   Clear output
        }                                                         //   Else no change.
    }
    CMX_INTERVAL_Status[bInstance] = bResult;            // Save current state
    
	return bResult;  
}