slider_diatonic_v1.cpp

00001 #include "mbed.h"
00002 #include "SLCD.h"
00003 #include "TSISensor.h"
00004 
00005 
00006 #define CHANNELON   0
00007 #define CHANNELOFF  1
00008 #define LCDLEN      10
00009 #define DATATIME    100 //milli seccnds
00010 //LCD messages
00011 
00012 
00013 
00014 // Operating parameters
00015 #define SIDETONE    700.0   
00016 #define TONEMIN     200.0
00017 #define TONEINT     800.00 // So tone max is 1000
00018 #define TONEON      0.50
00019 #define TONEOFF     0.0
00020 #define SPEEDAST    0
00021 #define TONEAST     1
00022 #define NUMTONES    10
00023 #define LEDPERIOD   0.001
00024 //#define PRINTDEBUG
00025 
00026 #define NUMOCTS 1
00027 //Button -->
00028 #define BUTOFF 1
00029 #define BUTON  0
00030 #define BUTTON PTC3
00031 #define PUSHTIME 1000 //wait to check for button press
00032 
00033 Serial pc(USBTX, USBRX);
00034 
00035 float diatonicScale[NUMTONES] = {246.94, 261.63,293.66,329.63,349.23,392.00,440.00,493.88,523.25,587.33};
00036 SLCD slcd; //define LCD display
00037 
00038 TSISensor tsiScaling; // Capacitive sensor/slider
00039 
00040 
00041 PwmOut led(LED_RED);
00042 DigitalOut outPin(PTC9); //J1-16
00043 PwmOut soundOut(PTA13);
00044 Timer dataTimer;
00045 // Global scalars
00046 char lcdData[LCDLEN];
00047 
00048 float tonePeriod;
00049 float toneFreq = SIDETONE;
00050 
00051 //Timers-->
00052 Timer buttonTimer;//checks for button state change after set amout of time.
00053 
00054 //buttons -->
00055 
00056 int LButtonState = BUTOFF; //Set the button state to off
00057 DigitalIn LftButton(BUTTON); //PTC3 
00058  
00059 //Octave changer -->
00060 int octaveState = NUMOCTS; //Not sure what value this should be
00061 
00062 void LCDMessNoDwell(char *lMess){
00063         slcd.Home();
00064         slcd.clear();
00065         slcd.printf(lMess);
00066 } 
00067   
00068 void diatonicAdjust( float scaling) {
00069     int tempInt;
00070     int scaleIndex;
00071     static int oldScaleIndex = 0;
00072 /* There appears to be a set up time for setting the PWM time period
00073 only do a nes set up if the indext changes.
00074 */
00075     scaleIndex = (int)(NUMTONES * scaling);
00076     if (scaleIndex != oldScaleIndex) {
00077         toneFreq = diatonicScale[scaleIndex];
00078         tonePeriod = 1.0/toneFreq;  
00079         soundOut.period(tonePeriod); // adjusting period
00080         soundOut.write(TONEON); // there is a setup time for both period and DF
00081         oldScaleIndex = scaleIndex;
00082     } else {
00083         return;
00084     }
00085 #ifdef PRINTDEBUG
00086     pc.printf(" %f,%d\n\r",scaling, scaleIndex );
00087 #endif
00088     tempInt = (int)toneFreq;
00089     sprintf (lcdData,"%4d",tempInt);
00090     LCDMessNoDwell(lcdData);
00091     return;
00092 }
00093 void lightAdjust( float scaling) { // Control brightness of LED
00094     float tempDutyFactor;
00095     
00096     tempDutyFactor = 1.0 - scaling; //LED is a sinking connection                                   // anode is held at 5V
00097     led.write(tempDutyFactor); //adjusting duty factor
00098     return;
00099 }
00100 
00101 int main(){
00102     int tempInt;
00103     float tempValue;
00104     
00105     tonePeriod = 1.0/toneFreq; 
00106     soundOut.period(tonePeriod);
00107     led.period(tonePeriod);
00108     led.write(CHANNELOFF);
00109     outPin.write(CHANNELOFF);
00110     
00111     tempInt = (int)toneFreq;
00112     sprintf (lcdData,"%4d",tempInt);
00113     LCDMessNoDwell(lcdData);
00114    // Start data timer
00115     dataTimer.start();
00116     dataTimer.reset(); 
00117     buttonTimer.start(); //checks for button state change after set amout of time.
00118     buttonTimer.reset();
00119     
00120     while (true) {
00121         
00122         if(buttonTimer.read_ms() > PUSHTIME) {
00123             //check button first
00124             LButtonState = !LftButton; //button is off or on
00125             if(LButtonState) {
00126                 octaveState++;
00127                 octaveState = octaveState % NUMOCTS;   
00128             }
00129         }
00130         
00131         if (dataTimer.read_ms() > DATATIME){ // check to see if enough time has passed
00132                                             // to read the touch pad
00133             tempValue = tsiScaling.readPercentage();
00134             if(tempValue > 0) {
00135                 // soundOut.write(TONEON); // set duty factor to 50%
00136                 diatonicAdjust(tempValue);
00137                 lightAdjust(tempValue);
00138             } else { 
00139                 soundOut.write(TONEOFF); // set dutyfactor to 0%
00140                 sprintf(lcdData, "%4d", octaveState + 1);
00141                 LCDMessNoDwell("lcdData");
00142             }       
00143             dataTimer.reset();
00144         }                 
00145     } // while forever
00146 }// end main