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hello.cpp
00001 // Flash an LED while a DigitalIn is true 00002 00003 #include "mbed.h" 00004 00005 AnalogIn ain(p15); 00006 Serial pc(USBTX, USBRX); // tx, rx 00007 00008 float media=0; 00009 float alpha=0.99; 00010 float actual=0; 00011 float offset=0.001; 00012 00013 int contador=0; 00014 00015 char state =0; 00016 char prev_state=0; 00017 int timeini; 00018 int timefi; 00019 Timer timer; 00020 int main() { 00021 00022 media= ain.read(); 00023 timer.start(); 00024 while(1) { 00025 actual=ain; 00026 // pc.printf("actual %f \n\r",actual); 00027 // pc.printf("media %f \n\r",media); 00028 media=media*alpha+(1-alpha)*actual; 00029 if((actual-media) > offset){ 00030 state=1; 00031 if(prev_state==0){ 00032 if(contador==0){ 00033 timeini = timer.read_us(); 00034 contador++; 00035 }else if(contador==1){ 00036 timefi = timer.read_us(); 00037 pc.printf("Periode %d \n\r",timefi-timeini); 00038 contador=0; 00039 } 00040 } 00041 }else if((actual-media) < offset){ 00042 state=0; 00043 00044 } 00045 prev_state = state; 00046 wait(0.0002); 00047 } 00048 }
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