Revision 0:f2441ea29233, committed 2015-04-22

Comitter:

scohennm

Date:

Wed Apr 22 18:07:44 2015 +0000

Commit message:

example to read an analog input ultrasonic sensor.

Changed in this revision

diff -r 000000000000 -r f2441ea29233 amaxmain2.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/amaxmain2.cpp	Wed Apr 22 18:07:44 2015 +0000
@@ -0,0 +1,73 @@
+#include "mbed.h"
+
+//#define PRINTDBUG
+#define WAITTIME 100
+#define NEARLIMIT 0.025
+#define FARLIMIT 0.40
+#define LEDON false
+#define LEDOFF true
+#define LEDFULLBRITE 0.0
+#define LEDNOBRITE 1.0
+#define HALFBRITE 0.5
+#define PROGNAME "AnalogMAX v2\r\n"  // puTTY does not automatically add carriage return
+
+AnalogIn input(PTC2);
+// Set up PWM on all three colors
+PwmOut greenLED(LED_GREEN); // green led
+PwmOut blueLED(LED_BLUE);
+PwmOut redLED(LED_RED); // red led
+Serial pc(USBTX, USBRX);
+Timer millis;
+
+int ledState = false;
+
+void takeData(float spanScale) {
+            
+    float samples;
+    float scaledPWM;
+    
+        samples = input.read();
+#ifdef PRINTDBUG
+        pc.printf("%f\r\n", samples);
+#endif
+    if ((samples > NEARLIMIT) && (samples < FARLIMIT)){
+            scaledPWM = (samples - NEARLIMIT)*spanScale;
+            redLED = 1.0 - scaledPWM;
+           // greenLED = LEDOFF; // on
+            blueLED = scaledPWM;
+#ifdef PRINTDBUG
+            pc.printf("RED -> %f BLUE -> %f\r\n", redLED.read(), blueLED.read());
+#endif
+    }else{
+            redLED = LEDNOBRITE; // off
+            // greenLED = HALFBRITE;
+            blueLED = LEDNOBRITE;
+    }
+    return;
+}
+// end takeData()
+// ----------------------------
+int main() {
+    float spanScale;
+
+  // initialization  
+  // calulate scaling for red/blue LED
+   
+    
+    spanScale = 1.0/(FARLIMIT-NEARLIMIT);
+    pc.printf(PROGNAME);
+    
+    greenLED = HALFBRITE; // 1/2 on
+    redLED = LEDNOBRITE; // pwm off
+    blueLED = LEDFULLBRITE; // pwm on
+    millis.start();
+    millis.reset();
+// Loop forever
+    while(true){     
+        if (millis.read_ms() > WAITTIME) { 
+            takeData(spanScale);
+            millis.reset();
+        }
+    }      
+   
+}   // end main
\ No newline at end of file

diff -r 000000000000 -r f2441ea29233 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Apr 22 18:07:44 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/8a40adfe8776
\ No newline at end of file