Diff: main.cpp

Revision:

0:285365ada25d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Apr 01 19:26:16 2015 +0000
@@ -0,0 +1,105 @@
+#include "mbed.h"
+#include "SLCD.h"
+
+// copied from Change state example for basis 02.22.2014 sc
+#define PROGNAME "555_onshot trigger v3\r\n"
+#define HIGH 1
+#define LOW 0
+#define PIN_2_555 D2
+#define PIN_3_555 D3
+#define PIN_3_CLONE LED_GREEN
+#define LEDON LOW
+#define LEDOFF HIGH
+#define OUTPULSELEN 100 // ms
+#define DATADELAY 1
+#define SERIALSPEED 57600
+#define MAX_OUT 1500 // ms
+#define MIN_OUT 500
+#define ABORTTIME 3500
+#define INPUTSTART 1
+#define DATARATE 1000 // ms time between data takes.
+#define LCDLEN 10
+#define STARTMESS "STRT"
+#define BGNMESS "BEGN"
+
+// this constant won't change:
+DigitalOut oneShotIn (PIN_2_555); 
+// the pin that the pushbutton is attached to
+DigitalIn oneShotOut (PIN_3_555);
+DigitalOut ledPin(PIN_3_CLONE);       // the pin that the LED is attached to
+Serial pc(USBTX, USBRX);
+SLCD slcd; 
+Timer milliTimer; 
+
+long  oneShotLen;
+long timeOut = ABORTTIME;
+long nextDataTake = DATARATE;
+long oneShotBegin;
+long oneShotEnd;
+// Variables will change:
+int buttonPushCounter = 0;   // counter for the number of button presses
+int buttonState = 0;         // current state of the button
+int lastButtonState = 0;     // previous state of the button
+
+
+void LCDMess(char *lMess){
+        slcd.Home();
+        slcd.clear();
+        slcd.printf(lMess);
+} 
+void pulseOut (long pulseLen){
+    oneShotIn.write(LOW);
+    wait_us(pulseLen);
+    oneShotIn.write(HIGH);
+}
+
+void setup() {
+  
+  // initialize serial communication:
+  
+  pc.printf(PROGNAME);
+  LCDMess(BGNMESS);
+  oneShotIn.write(HIGH);
+  oneShotOut.mode(PullNone);
+  ledPin.write(LOW);
+  milliTimer.start();
+  milliTimer.reset();
+  nextDataTake =  DATARATE;
+  lastButtonState = LOW;
+}
+
+
+void loop() {
+  char lcdData[LCDLEN];
+  oneShotLen = 0;
+  if (milliTimer.read_ms() > nextDataTake){
+     LCDMess(STARTMESS);
+     pulseOut(OUTPULSELEN); 
+     wait_ms(DATADELAY);
+     buttonState = oneShotOut.read();
+     if (buttonState == INPUTSTART) {
+        oneShotBegin = milliTimer.read_ms();
+        ledPin.write(LEDON);
+        while ((buttonState == INPUTSTART) && (oneShotLen < ABORTTIME)){
+          oneShotLen = milliTimer.read_ms();
+          //pc.printf("%d\r\n",oneShotLen);  
+          buttonState = oneShotOut.read();      
+       } 
+       pc.printf("%d\r\n",oneShotLen);  
+       sprintf(lcdData,"%4d",oneShotLen);
+       LCDMess(lcdData);
+       ledPin.write(LEDOFF);
+       milliTimer.reset();
+       nextDataTake = DATARATE;
+    } 
+   
+  }
+ 
+}
+
+int main(){
+    setup();
+    while (true) {
+        loop();
+    }
+}
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