main.cpp

00001 //--------------------------------------------------------------
00002 // 入力の切り替え（ラインとマイク），LCD 表示 ---- 割り込み利用
00003 //      Analog Input : A0
00004 //      Analog Output: MCP4922 using SPI
00005 // 2014/12/26, Copyright (c) 2014 MIKAMI, Naoki
00006 //--------------------------------------------------------------
00007 
00008 #include "ADC_Interrupt.hpp"    // for ADC using interrupt
00009 #include "DAC_MCP4922.hpp"      // for DAC MCP4922
00010 #include "ACM1602NI.hpp"        // for LCD
00011 
00012 using namespace Mikami;
00013 
00014 const int FS_ = 10000;          // Sampling frequency: 10 kHz
00015 ADC_Intr adc_(A0, FS_, A1);     // CH1: Line, CH2: Mic
00016 DAC_MCP4922 myDac_;             // for DA
00017 DigitalIn sw_(D2, PullDown);    // for SW
00018 Acm1602Ni lcd_;                 // for LCD
00019 
00020 // Interrupt service routine for ADC
00021 void AdcIsr()
00022 {   
00023     float xn = adc_.Read(); // Read from A0
00024     myDac_.Write(xn);       // to DAC
00025 }
00026 
00027 int main()
00028 {
00029     lcd_.Clear();
00030     myDac_.ScfClockTim3(420000);    // cutoff frequency: 4.2 kHz
00031     adc_.SetIntrVec(AdcIsr);        // Assign ISR for ADC interrupt
00032 
00033     int swBefore = 0;
00034 
00035     while (true)
00036     {
00037         int swNow = sw_.read();
00038         if (swNow != swBefore)
00039         {
00040             if (swNow == 0) adc_.Select1stChannel(); // line input
00041             else            adc_.Select2ndChannel(); // mic. input
00042             swBefore = swNow;
00043         }   
00044 
00045         if (swNow == 0) lcd_.WriteStringXY("Input: Line", 0, 0);
00046         else            lcd_.WriteStringXY("Input: Mic ", 0, 0);
00047         wait(0.1f);
00048     }
00049 }