trms.h

00001 /*
00002  * Copyright (c) 2014 LAAS-CNRS
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #ifndef TRMS_H
00018 #define TRMS_H
00019 
00020 #include "mbed.h"
00021 #include "AnalogIn_Diff.h"
00022 #include "math.h"
00023 #include "MovingAverage.h"
00024 
00025 
00026 #define FREQ 50//en HZ
00027 #define TSAMPLE 125 //en µS
00028 #define R1 1.0E6
00029 #define R2 510.0
00030 #define ADCVREF 3.3
00031 #define GAIN_ACPL_C78 0.125
00032 #define GAIN ((double)((R1+R2)*2.0*GAIN_ACPL_C78*ADCVREF/R2)/65535.0)
00033 #define UAC_NON 230.0
00034 #define UAC_MON_i32 ((int32_t)((double)UAC_NON/(double)GAIN))
00035 #define UAC_MAX ((int32_t)((double)UAC_NON*1.1/(double)GAIN))
00036 #define UAC_MIN ((int32_t)((double)UAC_NON*0.9/(double)GAIN))
00037 #define UAC_NON2 ((int32_t)((double)UAC_NON/(double)GAIN*(double)UAC_NON/(double)GAIN))
00038 #define UAC_MAX2 ((int32_t)((double)UAC_MAX*(double)UAC_MAX))
00039 #define UAC_MIN2 ((int32_t)((double)UAC_MIN*(double)UAC_MIN))
00040 #define UAC_MAX2STOP ((int32_t)((double)UAC_MAX*(double)UAC_MAX)*0.95)
00041 #define UAC_MIN2STOP ((int32_t)((double)UAC_MIN*(double)UAC_MIN)*1.05)
00042 #define NSAMPLE ((int32_t)(1/(double)FREQ *1.0E6/(double)TSAMPLE))
00043 //#define max(a,b) ((a)>=(b)?(a):(b))
00044 //#define min(a,b) ((a)<=(b)?(a):(b))
00045 
00046 #define MAX(a,b) ({ typeof(a) aa = (a); typeof(b) bb = (b); aa>=bb? aa: bb; })
00047 #define MIN(a,b) ({ typeof(a) aa = (a); typeof(b) bb = (b); aa<=bb? aa: bb; })
00048 
00049 #define VERSION_TRMS "2014_12_10"
00050 
00051 
00052 class trms : public AnalogIn_Diff
00053 {
00054 
00055 public:
00056     /**
00057     * Constructor
00058     *
00059     * @param a2d_number_chan is ADC_DIFF(#adc, #ch)
00060     * @return true if successful
00061     */
00062 
00063     trms(int adc_Diff_number_chan) ;
00064 
00065     /**
00066     *  destructor
00067     */
00068     ~trms();
00069 
00070     void start();
00071     float read_rms();
00072     float get_gain();
00073     void set_gain(float gain);
00074     float get_offset();
00075     void set_offset(float offset);
00076     bool flag(float *rms, uint32_t *time);
00077     
00078 private:
00079    volatile bool _flag_trms;
00080     volatile bool _flag_max;
00081     volatile bool _flag_min;
00082    
00083     volatile int32_t _min;
00084     volatile int32_t _max;
00085     volatile float gain;
00086     volatile float offset;
00087     volatile bool F_timer_min;
00088     volatile bool F_timer_max;
00089     volatile uint32_t _time_min;
00090     volatile uint32_t _time_max;
00091  
00092     Timer timer_min;
00093     Timer timer_max;
00094     void flipadc_Diff();
00095     MovingAverage <uint32_t>vtrms;
00096     Ticker flipperadc_Diff;
00097     
00098 
00099 };
00100 
00101 #endif //TRMS_H