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Fork of lightsense_kl46z_states_nowait by
Diff: main.cpp
- Revision:
- 4:bd42ab18979b
- Parent:
- 3:64e28ee5719b
- Child:
- 5:817aa144563d
--- a/main.cpp Tue Sep 09 21:49:20 2014 +0000 +++ b/main.cpp Thu Sep 11 22:32:51 2014 +0000 @@ -17,13 +17,8 @@ #define NEWDUTYFACTOR 1 #define IDLESTATE 0 -float dutyFactor = 0.0; -PwmOut greenColor(LED_GREEN); -PwmOut redColor(LED_RED); -SLCD slcd; //define LCD display -float rampDirection[NUMSTATES] = {-DFDELTA, DFDELTA}; - +SLCD slcd; //define LCD display globally define Serial pc(USBTX, USBRX); void LCDMess(char *lMess){ @@ -33,13 +28,15 @@ } int main() { + PwmOut greenColor(LED_GREEN); + PwmOut redColor(LED_RED); char lcdData[LCDLEN]; - int rampstate = RMPUP; - int numSteps; - float workingDelta; - Timer LEDTimer; + Timer LEDTimer; // time till next PWM values is to change. + int dfState = IDLESTATE; // work till timer transitions + float dutyFactor = 0.0; + float workingDelta; // hold value of direction of duty factor + int timeToChangeDF = PWMDWELL; - int i=0; // set up timer for next step of Duty Factor timing LEDTimer.start(); LEDTimer.reset(); @@ -48,25 +45,35 @@ greenColor.period_ms(PWMTIME); // set the frequency of the pulse train redColor.period_ms(PWMTIME); // so there is no flickering - workingDelta = rampDirection[rampstate]; - numSteps = (int)(1.0/workingDelta); + workingDelta = DFDELTA; + while(true) { - if (LEDTimer.read_ms() > timeToChangeDF) { - i++; - redColor.write(dutyFactor); - greenColor.write(1.0 - dutyFactor); - dutyFactor += workingDelta; - sprintf (lcdData,"%4.3f",dutyFactor); - LCDMess(lcdData); + switch (dfState){ + case IDLESTATE: { + if (LEDTimer.read_ms() > timeToChangeDF){ // check for timer time out transtion + dfState = NEWDUTYFACTOR; + LEDTimer.reset(); + } + break; + } + case NEWDUTYFACTOR: { + dutyFactor += workingDelta; + if(dutyFactor >= 1.0) workingDelta = -workingDelta; // change direction if needed + if(dutyFactor < DFDELTA) workingDelta = DFDELTA; + redColor.write(dutyFactor); + greenColor.write(1.0 - dutyFactor); + // print to LCD screen + sprintf (lcdData,"%4.3f",dutyFactor); + LCDMess(lcdData); + + LEDTimer.reset(); // reset the timer + dfState = IDLESTATE; // go idle state + break; + } + } // end state machine + #ifdef PRINTDEBUG pc.printf("i= %d dutyfactor = %5.4f workingDelta %5.4f \n\r", i, dutyFactor, workingDelta); #endif - if (!(i % numSteps)){ - i=0; - LEDTimer.reset(); - rampstate = !rampstate; - workingDelta = rampDirection[rampstate]; - } - } - } -} \ No newline at end of file + }// emd while +}