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// /******************************************************************************
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// * Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD.
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// *
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// *-----------------------------------------------------------------------------
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// * File: pressure.c
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// * Description: get pressure of now and display it on OLED code
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// * Author: Lishoujian (867693272@qq.com)
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// * Date: Jan 8, 2015
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// *****************************************************************************/
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#include "pressure.h"
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#include "adc.h"
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#include "para.h"
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#include "devicegpioinit.h"
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#include "regdefine.h"
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#include "ads1120.h"
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float Get_pressure(float pre_vol);
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#define AD_REF_VOL 3000
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#define AD_PRESSURE_CH 10
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#define AD_CNT 40
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/******************************************
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* func: Get_pressure_volt
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* desc: get average voltage from pressure sensor.
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* input: none
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* output: none
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* return: average voltage:eg 1000 means voltage equal to 1.000v
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*****************************************/
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float get_pressure(void)
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{
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// float vol;
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float tmp;
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/* vol = pressure_ad_value();//10 - channel 3300 - 3.3v vref
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if((vol > 0.095)||(vol < 0.001))
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{
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return 0;
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}
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else
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{
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vol = vol * 1000;
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tmp = Get_pressure(vol);
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}*/
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return tmp;
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}
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/******************************************
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* func: Get_pressure
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* desc: transform the voltage of sampling to pressure
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* input: pre_vol - the voltage of sampling eg:(pre_vol max = 0.100v) 0.100v => 100
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* output: none
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* return: bar - pressure of now:eg 160 means 16.0bar
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*****************************************/
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float Get_kb_pressure(float pre_vol)
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{ //pre_vol max <= 3300
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float kpa;
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// kpa = pre_vol*system_para_control_run_g.pressure_para_k + system_para_control_run_g.pressure_para_b;
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return kpa;
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}
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