AnnaLouise Martinez / Mbed 2 deprecated lightsense_kl46z_basic

led light on and off using light sensor

Dependencies:   SLCD mbed

Fork of lightsense_kl46z_basic by Stanley Cohen

main.cpp@3:64e28ee5719b, 2014-09-09 (annotated)

Committer:
scohennm
Date:
Tue Sep 09 21:49:20 2014 +0000
Revision:
3:64e28ee5719b
Parent:
2:c016448d89b2
Child:
4:bd42ab18979b
Revised so that there is no wait function.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
scohennm 0:e23fffd4b9a7 1 #include "mbed.h"
scohennm 1:51f8c2b04ce2 2 #include "SLCD.h"
scohennm 1:51f8c2b04ce2 3
scohennm 3:64e28ee5719b 4
scohennm 1:51f8c2b04ce2 5 // An example of C++ abuse 140904 sc
scohennm 1:51f8c2b04ce2 6 //#define PRINTDEBUG
scohennm 1:51f8c2b04ce2 7 #define PROGNAME "blink_kl46z_states v1\n\r"
scohennm 0:e23fffd4b9a7 8 #define LEDON false
scohennm 0:e23fffd4b9a7 9 #define LEDOFF true
scohennm 1:51f8c2b04ce2 10 #define PWMDWELL 50 // milliseconds
scohennm 1:51f8c2b04ce2 11 #define DFDELTA 0.01
scohennm 1:51f8c2b04ce2 12 #define PWMTIME 1 // ms (kHz
scohennm 1:51f8c2b04ce2 13 #define LCDLEN 10
scohennm 1:51f8c2b04ce2 14 #define RMPUP true
scohennm 1:51f8c2b04ce2 15 #define RMPDWN false
scohennm 1:51f8c2b04ce2 16 #define NUMSTATES 2
scohennm 3:64e28ee5719b 17 #define NEWDUTYFACTOR 1
scohennm 3:64e28ee5719b 18 #define IDLESTATE 0
scohennm 0:e23fffd4b9a7 19
scohennm 1:51f8c2b04ce2 20 float dutyFactor = 0.0;
scohennm 1:51f8c2b04ce2 21 PwmOut greenColor(LED_GREEN);
scohennm 1:51f8c2b04ce2 22 PwmOut redColor(LED_RED);
scohennm 1:51f8c2b04ce2 23 SLCD slcd; //define LCD display
scohennm 1:51f8c2b04ce2 24 float rampDirection[NUMSTATES] = {-DFDELTA, DFDELTA};
scohennm 1:51f8c2b04ce2 25
scohennm 3:64e28ee5719b 26
scohennm 1:51f8c2b04ce2 27 Serial pc(USBTX, USBRX);
scohennm 1:51f8c2b04ce2 28
scohennm 1:51f8c2b04ce2 29 void LCDMess(char *lMess){
scohennm 1:51f8c2b04ce2 30 slcd.Home();
scohennm 1:51f8c2b04ce2 31 slcd.clear();
scohennm 1:51f8c2b04ce2 32 slcd.printf(lMess);
scohennm 1:51f8c2b04ce2 33 }
scohennm 0:e23fffd4b9a7 34
scohennm 0:e23fffd4b9a7 35 int main() {
scohennm 1:51f8c2b04ce2 36 char lcdData[LCDLEN];
scohennm 1:51f8c2b04ce2 37 int rampstate = RMPUP;
scohennm 1:51f8c2b04ce2 38 int numSteps;
scohennm 1:51f8c2b04ce2 39 float workingDelta;
scohennm 3:64e28ee5719b 40 Timer LEDTimer;
scohennm 3:64e28ee5719b 41 int timeToChangeDF = PWMDWELL;
scohennm 1:51f8c2b04ce2 42 int i=0;
scohennm 3:64e28ee5719b 43 // set up timer for next step of Duty Factor timing
scohennm 3:64e28ee5719b 44 LEDTimer.start();
scohennm 3:64e28ee5719b 45 LEDTimer.reset();
scohennm 1:51f8c2b04ce2 46 pc.printf(PROGNAME);
scohennm 1:51f8c2b04ce2 47
scohennm 2:c016448d89b2 48 greenColor.period_ms(PWMTIME); // set the frequency of the pulse train
scohennm 3:64e28ee5719b 49 redColor.period_ms(PWMTIME); // so there is no flickering
scohennm 3:64e28ee5719b 50
scohennm 1:51f8c2b04ce2 51 workingDelta = rampDirection[rampstate];
scohennm 1:51f8c2b04ce2 52 numSteps = (int)(1.0/workingDelta);
scohennm 0:e23fffd4b9a7 53 while(true) {
scohennm 3:64e28ee5719b 54 if (LEDTimer.read_ms() > timeToChangeDF) {
scohennm 3:64e28ee5719b 55 i++;
scohennm 3:64e28ee5719b 56 redColor.write(dutyFactor);
scohennm 3:64e28ee5719b 57 greenColor.write(1.0 - dutyFactor);
scohennm 3:64e28ee5719b 58 dutyFactor += workingDelta;
scohennm 3:64e28ee5719b 59 sprintf (lcdData,"%4.3f",dutyFactor);
scohennm 3:64e28ee5719b 60 LCDMess(lcdData);
scohennm 1:51f8c2b04ce2 61 #ifdef PRINTDEBUG
scohennm 1:51f8c2b04ce2 62 pc.printf("i= %d dutyfactor = %5.4f workingDelta %5.4f \n\r", i, dutyFactor, workingDelta);
scohennm 1:51f8c2b04ce2 63 #endif
scohennm 3:64e28ee5719b 64 if (!(i % numSteps)){
scohennm 3:64e28ee5719b 65 i=0;
scohennm 3:64e28ee5719b 66 LEDTimer.reset();
scohennm 3:64e28ee5719b 67 rampstate = !rampstate;
scohennm 3:64e28ee5719b 68 workingDelta = rampDirection[rampstate];
scohennm 3:64e28ee5719b 69 }
scohennm 1:51f8c2b04ce2 70 }
scohennm 0:e23fffd4b9a7 71 }
scohennm 0:e23fffd4b9a7 72 }