// /******************************************************************************
//  * Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD.
//  *
//  *-----------------------------------------------------------------------------
//  * File: 			    pressure.c
//  * Description:		get pressure of now and display it on OLED code
//  * Author:			  Lishoujian (867693272@qq.com)
//  * Date:			    Jan 8, 2015
//  *****************************************************************************/

#include "pressure.h"
#include "adc.h"
#include "para.h"
#include "devicegpioinit.h"
#include "regdefine.h"
#include "ads1120.h"
float Get_pressure(float pre_vol);


#define	AD_REF_VOL							3000
#define	AD_PRESSURE_CH			    10
#define	AD_CNT					    	  40
/******************************************
 * func:    Get_pressure_volt
 * desc:    get average voltage from pressure sensor.
 * input:   none
 * output:  none
 * return:  average voltage:eg 1000 means voltage equal to 1.000v
 *****************************************/
float get_pressure(void)  
{

//	float	vol;
	float	tmp;
	



/*	vol = pressure_ad_value();//10 - channel  3300 - 3.3v vref
	if((vol  > 0.095)||(vol  < 0.001))
	{
		return	0;
	}
	else
	{
		vol = vol * 1000;
		tmp = Get_pressure(vol);
		
	}*/
	return tmp;
} 


/******************************************
 * func:    Get_pressure
 * desc:    transform the voltage of sampling to pressure
 * input:   pre_vol - the voltage of sampling eg:(pre_vol max = 0.100v) 0.100v => 100 
 * output:  none
 * return:  bar - pressure of now:eg 160 means 16.0bar
 *****************************************/

float Get_kb_pressure(float pre_vol)
{ //pre_vol max <= 3300 
	float kpa;  
	
//	kpa = pre_vol*system_para_control_run_g.pressure_para_k + system_para_control_run_g.pressure_para_b;
	
  return kpa;
}