涂 桂旺 / HCSR04

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Fork of HCSR04 by TVZ Mechatronics Team

Diff: HCSR04.cpp

Revision:
4:aae70f15357f
Parent:
3:9a7899cf5e3a
Child:
6:cf3e4e307d15
--- a/HCSR04.cpp	Sun Dec 06 15:13:54 2015 +0000
+++ b/HCSR04.cpp	Mon Dec 07 09:37:21 2015 +0000
@@ -13,7 +13,7 @@
     echo.fall(this, &HCSR04::stopTimer);
     
     distance = -1;      // initial distance
-    minDistance = 4;
+    minDistance = 2;
     maxDistance = 400;
 }
 
@@ -42,4 +42,26 @@
 float HCSR04::getDistance_cm() {
     startMeasurement();
     return distance;
+}
+
+float HCSR04::getDistance_mm() {
+    startMeasurement();
+    return distance * 10;
+}
+
+void HCSR04::setRanges(float minRange, float maxRange) {
+    if (minRange < maxRange) {
+        if (minRange >= 2) 
+            minDistance = minRange;
+        if (maxRange <= 400)
+            maxDistance = maxRange;
+    }
+}
+
+float HCSR04::getMinRange() {
+    return minDistance;
+}
+
+float HCSR04::getMaxRange() {
+    return maxDistance;
 }
\ No newline at end of file