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main.cpp
00001 #include "mbed.h" 00002 00003 DigitalIn g_digitalinIrReceiver(p20); 00004 Serial g_serial(USBTX, USBRX); 00005 00006 int main() 00007 { 00008 // デジタル入力ピンは、デフォルトで、内部プルダウンとなります(参考:https://developer.mbed.org/handbook/DigitalIn) 00009 // 内部プルダウンの場合、IRセンサーからのHIGH電圧をLOW電圧と検知してしまうので、内部プルモードを「プルなし(PullNone)」にします。 00010 g_digitalinIrReceiver.mode( PullNone ); // mode : PullUp, PullDown, PullNone, OpenDrain 00011 g_serial.baud(115200); 00012 00013 Timer timer; 00014 timer.start(); 00015 int iMicroSec_prev = timer.read_us(); 00016 int iState_prev = 1; 00017 while(1) 00018 { 00019 int iState = g_digitalinIrReceiver; 00020 if( iState != iState_prev ) 00021 { 00022 iState_prev = iState; 00023 int iMicroSec = timer.read_us(); 00024 g_serial.printf( "%d, ", iMicroSec - iMicroSec_prev ); 00025 iMicroSec_prev = iMicroSec; 00026 } 00027 } 00028 }
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