f.rar_rms measurement_单片机 测量_有效值

/************************************************************* Copyright (C),NEC Electronics (China) File name: Author: Version:1.0 Date: Description: Others: Function List: History: 1. Date: Author: Modification: 2. ... **************************************************************/ #include "main.h" #include <string.h> #include <stdio.h> #include <stdlib.h> #include <math.h> void main() { CG_init(); Port_init(); lcd_init(); delay(10); while(1){ while(j<2){ choose_fre(); j++; } j=0; if(fre>=1000){ while(N!=512){ N++; true_peak_init(); } while(N!=0) { ADC(ad[N-1]); true(turn); peak(turn); N--; } } else{ true_peak_init(); while(N!=0) { ADC(ad[N-1]); true(turn); peak(turn); N--; } } time++; RMS=sqrt(frms/rmsnum)+RMS; Vpp=peakup-peakdown+Vpp; frms=0; rmsnum=0; N=0; peakup=-100; peakdown=100; P5.7=0; if(time==1){ P5.7=1; if(key_choose==0){ displayfre(); displayvpp(); displayrms(); } if(key_choose==1){ int i; float tmp; plot_fit1(); plot_fit1(); plot_fit1(); //plot_fit1(); //plot_fit1(); //plot_fit1(); LCD12864_Clean(); for(i=0;i<128;i++) display_point(i,54*(ver*ad[i]/256.0-2.5)/Vpp,1); for(i=0;i<50;i++){ delay(10000); delay(10000); delay(10000); } LCD12864_Clean(); for(i=0;i<128;i++) display_point(i,54*(ver*ad[i+128]/256.0-2.5)/Vpp,1); for(i=0;i<50;i++){ delay(10000); delay(10000); delay(10000); } LCD12864_Clean(); for(i=0;i<128;i++) display_point(i,54*(ver*ad[i+256]/256.0-2.5)/Vpp,1); for(i=0;i<50;i++){ delay(10000); delay(10000); delay(10000); } LCD12864_Clean(); for(i=0;i<128;i++) display_point(i,54*(ver*ad[i+384]/256.0-2.5)/Vpp,1); for(i=0;i<50;i++){ delay(10000); delay(10000); delay(10000); } //for(i=0;i<128;i++) // display_point(i,54*(ver*ad[i]/256.0-2.6)/Vpp,1); } Global_init(); } } } void CG_init() { //System clock: 20 MHz CMC = 0x51; CSC = 0x41; CKC = 0x38; } /* This function is used to initial all the port used */ void Port_init() { PM3.1=0; //P3.1 output PM6&=0x07; //P6.0 to P6.2 input;P6.3 to P6.7 output P6.3 =0; P6.4 =0; P6.5 =0; P6.6 =0; P6.7 =0; P3.1 =0; //AD data PM8=0xFF; //AD control PM7.0=0; //WR PM7.1=0; //RD PM7.2=1; PM5.3=0; PM5.7=0; PM5.6=1; PM5.1=0; PM5.2=1; P5.3=1; //INTR //low frequency input PM4.2=1; //high frequency input PM0.0=1; PM5.4=0; PM5.5=1; PM12.0=1; //12864 PM2=0x00; //as the input of LCD 12864 Module PM15.0=0; PM15.1=0; PM15.2=0; } void choose_fre(void) { high_init();TT0=0x0003; if(fre<1000) {period_init(); TT0=0x0010;} } void period_init(void){ DI(); TAU0EN = 1; TPS0 = 0X000B; TMR04 = 0X0104; TS0= 0x0010; TMIF04=0; TMMK04=0; EI(); state_period=1; while(state_period==1); } __interrupt void Time_4( void ){ flag_period++; if(flag_period>=3) { lowtime=lowtime+TDR04+1; if(flag_period==4){ flag_period=0; fre=1/(0.0001024*lowtime/2); state_period=0; lowtime=0; } } } void high_init(void) { DI(); state_high=1; TAU0EN = 1; /*set Timer1*/ TPS0 = 0X0000; TMR01 = 0X0000; TMR00 = 0x1106; /*a question*/ //TMPR001=0; //TMPR101=0; TDR01 = 0X4E1F;/*delay one second*/ TDR00 = 0xFFFF; TS0= 0x0002|0x0001; TMIF01=0; TMIF00=0; TMMK01=0; TMMK00=0; EI(); while(state_high==1); } __interrupt void Time_1(void) { flag_high++; if(flag_high==1000){ TT0=0x0001; fre=(0xFFFF-TCR00)+65535*Num; state_high=0; Num=0; flag_high=0; } } __interrupt void Time_0(void) { Num++; } void true_peak_init(void) { DI(); if(fre>=1000){ TAU0EN = 1; TPS0 = 0X0000; TMR05 = 0X0000; if(fre>100000) TDR05 = N; else if(fre>50000) TDR05=N*4; else if(fre>20000) TDR05 = N*4; else if(fre>10000) TDR05 = N*10; else if(fre>5000) TDR05 = N*20; else if(fre>2500) TDR05 = N*40; else TDR05 = N*80; choose_rms=1; TMIF05=0; TMMK05=0; EGP0=0; EGN0=1; PIF0=0; PMK0=0; TMPR005=0; TMPR105=0; state_true_peak_1=1; state_true_peak_2=1; EI(); while(state_true_peak_1==1); } else{ TAU0EN = 1; TPS0 = 0X0009; TMR05 = 0X0000; TDR05=1/fre/100/0.0000256; choose_rms=0; TMIF05=0; TMMK05=0; EGP0=0; EGN0=1; PIF0=0; PMK0=0; TMPR005=0; TMPR105=0; state_true_peak_1=1; state_true_peak_2=1; EI(); while(state_true_peak_1==1); } } __interrupt void outinter_0(void) { if(choose_rms==1) { EGP0=0; EGN0=0; DI(); TS0= 0x0020; EI(); while(state_true_peak_2==1); state_true_peak_1=0; } else{ EGP0=0; EGN0=0; DI(); TS0= 0x0020; EI(); while(state_true_peak_2==1); state_true_peak_1=0; TT0=0x0020; DI(); } } __interrupt void Time_5(void) { if(choose_rms==1){ TT0=0x0020; EGP0=0; EGN0=0; DI(); RD=0; while(INTR==1); getdata=P8; RD=1; ad[N-1]=getdata; state_true_peak_2=0; } else{ EGP0=0; EGN0=0; RD=0; while(INTR==1); getdata=P8; RD=1; ad[N]=getdata; N++; if(N==512){ state_true_peak_2=0;} } } void ADC(unsigned char c) { turn=(float)c/255*ver-2.5; } void true(float a) { rmsnum++; frms=frms+a*a; } void peak(float b) { if(b>=peakup) { peakup=b; } if(b<=peakdown) { peakdown=b; } } void displayfre(void){ LCD12864_Clean(); LCD_clr(); print_float(fre,0x80+2); LCD_print_str("频率",0x80); LCD_print_str("Hz",0x80+7); } void displayvpp(void) { Vpp=Vpp/time; LCD_print_str("峰峰值",0x90); print_float(Vpp,0x90+3); LCD_print_str("V",0x90+7); } void displayrms(void){ RMS=RMS/time; LCD_print_str("有效值",0x88); print_float(RMS,0x88+3); LCD_print_str("V",0x88+7); } void Global_init(){ frms=0; rmsnum=0; N=0; peakup=-100; peakdown=100; P5.4=1; RMS=0; Vpp=0; time=0; j=0; } void plot_fit(void){ int i,down,up,jj; float times,tmp; times=N_num1/256.0; for(i=0;i<128;i++){ tmp=0; down=ceiling1(times*i); up=floor1(times*(i+1)); for(jj=down;j