From: daniel watson <ozzloy@gmail.com>
Date: Fri, 8 Nov 2013 05:35:28 +0000 (-0800)
Subject: add both sonars
X-Git-Url: http://challenge-bot.com/repos/?p=challenge-bot;a=commitdiff_plain;h=481b24d3794404dae8ecd9047cb7b9b5d0183795

add both sonars
---

diff --git a/arduino-sketches/both_sonars/both-sonars.fzz b/arduino-sketches/both_sonars/both-sonars.fzz
new file mode 100644
index 0000000..70765e3
Binary files /dev/null and b/arduino-sketches/both_sonars/both-sonars.fzz differ
diff --git a/arduino-sketches/both_sonars/both_sonars.ino b/arduino-sketches/both_sonars/both_sonars.ino
new file mode 100644
index 0000000..2d850ff
--- /dev/null
+++ b/arduino-sketches/both_sonars/both_sonars.ino
@@ -0,0 +1,70 @@
+/*
+ This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as
+    published by the Free Software Foundation, either version 3 of the
+    License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+int right_echo_pin = 6;
+int right_trigger_pin = 7;
+
+int left_echo_pin = 11;
+int left_trigger_pin = 12;
+
+int right_ping_microseconds = 0;
+int left_ping_microseconds = 0;
+double sound_cm_per_microsecond_at_sea_level = 0.034029;
+int count = 0;
+
+void on(int pin){
+  digitalWrite(pin, HIGH);}
+
+void off(int pin){
+  digitalWrite(pin, LOW);}
+
+int ping(int trigger, int echo){
+  int ping_time = 0;
+  // turn off trigger
+  off(trigger);
+  delayMicroseconds(2);
+  // turn on the trigger and leave it on long enough for the
+  // sonar sensor to notice
+  on(trigger);
+  delayMicroseconds(10);
+  off(trigger);
+  ping_time = pulseIn(echo, HIGH);
+  if(ping_time <= 0){
+    ping_time = 3000;}
+  // sonar needs some time to recover before pinging again,
+  // so make sure it gets enough sleep right here.  50 milliseconds
+  delay(50);
+  return ping_time;}
+
+void setup(){
+  Serial.begin(9600);
+  pinMode(right_echo_pin, INPUT);
+  pinMode(right_trigger_pin, OUTPUT);
+  pinMode(left_echo_pin, INPUT);
+  pinMode(left_trigger_pin, OUTPUT);}
+
+void loop(){
+  right_ping_microseconds = ping(right_trigger_pin, right_echo_pin);
+  left_ping_microseconds = ping(left_trigger_pin, left_echo_pin);
+  // print out the pulse time
+  Serial.print(right_ping_microseconds);
+  Serial.print(" = right ping microseconds, ");
+  Serial.print(left_ping_microseconds);
+  Serial.print(" = left ping microseconds. #");
+  Serial.println(count++);
+
+  // wait so it's easier to read the serial monitor.
+  // change delay to 0 for fullspeed.
+  //  default is 333, which is about 1/3 of a second
+  delay(333);}