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HW 7.1 Attempt to use button timers to check for button status instead of interrupts
Fork of slider_diatonic_v1 by
Diff: slider_diatonic_v1.cpp
- Revision:
- 3:f68e9cdfaf2d
- Parent:
- 2:7f347d6a6422
- Child:
- 4:922d6f8fe95f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/slider_diatonic_v1.cpp Wed Feb 18 15:27:17 2015 +0000 @@ -0,0 +1,117 @@ +#include "mbed.h" +#include "SLCD.h" +#include "TSISensor.h" + + +#define CHANNELON 0 +#define CHANNELOFF 1 +#define LCDLEN 10 +#define DATATIME 100 //milli seccnds +//LCD messages + + + +// Operating parameters +#define SIDETONE 700.0 +#define TONEMIN 200.0 +#define TONEINT 800.00 // So tone max is 1000 +#define TONEON 0.50 +#define TONEOFF 0.0 +#define SPEEDAST 0 +#define TONEAST 1 +#define NUMTONES 10 +#define LEDPERIOD 0.001 +//#define PRINTDEBUG + +Serial pc(USBTX, USBRX); + +float diatonicScale[NUMTONES] = {246.94, 261.63,293.66,329.63,349.23,392.00,440.00,493.88,523.25,587.33}; +SLCD slcd; //define LCD display + +TSISensor tsiScaling; // Capacitive sensor/slider + + +PwmOut led(LED_RED); +DigitalOut outPin(PTC9); //J1-16 +PwmOut soundOut(PTA13); +Timer dataTimer; +// Global scalars +char lcdData[LCDLEN]; + +float tonePeriod; +float toneFreq = SIDETONE; + + + +void LCDMessNoDwell(char *lMess){ + slcd.Home(); + slcd.clear(); + slcd.printf(lMess); +} + +void diatonicAdjust( float scaling) { + int tempInt; + int scaleIndex; + static int oldScaleIndex = 0; +/* There appears to be a set up time for setting the PWM time period +only do a nes set up if the indext changes. +*/ + scaleIndex = (int)(NUMTONES * scaling); + if (scaleIndex != oldScaleIndex) { + toneFreq = diatonicScale[scaleIndex]; + tonePeriod = 1.0/toneFreq; + soundOut.period(tonePeriod); // adjusting period + soundOut.write(TONEON); // there is a setup time for both period and DF + oldScaleIndex = scaleIndex; + } else { + return; + } +#ifdef PRINTDEBUG + pc.printf(" %f,%d\n\r",scaling, scaleIndex ); +#endif + tempInt = (int)toneFreq; + sprintf (lcdData,"%4d",tempInt); + LCDMessNoDwell(lcdData); + return; +} +void lightAdjust( float scaling) { // Control brightness of LED + float tempDutyFactor; + + tempDutyFactor = 1.0 - scaling; //LED is a sinking connection // anode is held at 5V + led.write(tempDutyFactor); //adjusting duty factor + return; +} + +int main(){ + int tempInt; + float tempValue; + + tonePeriod = 1.0/toneFreq; + soundOut.period(tonePeriod); + led.period(tonePeriod); + led.write(CHANNELOFF); + outPin.write(CHANNELOFF); + + tempInt = (int)toneFreq; + sprintf (lcdData,"%4d",tempInt); + LCDMessNoDwell(lcdData); + // Start data timer + dataTimer.start(); + dataTimer.reset(); + + while (true) { + if (dataTimer.read_ms() > DATATIME){ // check to see if enough time has passed + // to read the touch pad + tempValue = tsiScaling.readPercentage(); + if(tempValue > 0) { + // soundOut.write(TONEON); // set duty factor to 50% + diatonicAdjust(tempValue); + lightAdjust(tempValue); + } else { + soundOut.write(TONEOFF); // set dutyfactor to 0% + LCDMessNoDwell("SOFF"); + } + dataTimer.reset(); + } + } // while forever +}// end main \ No newline at end of file