From 9b337de2e341be254a9c941bca719c8860144a23 Mon Sep 17 00:00:00 2001
From: El Jeffo <mirage@rateaprof.com>
Date: Sun, 27 Sep 2015 22:04:27 +0900
Subject: [PATCH 1/3] Fix duty cycle to half period

---
 wiringPi/wiringPi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wiringPi/wiringPi.c b/wiringPi/wiringPi.c
index 9feec9f..7e1c3a2 100755
--- a/wiringPi/wiringPi.c
+++ b/wiringPi/wiringPi.c
@@ -2321,7 +2321,7 @@ void pwmToneWrite (int pin, int freq)
   {
     range = 600000 / freq ;
     pwmSetRange (range) ;
-    pwmWrite    (pin, freq / 2) ;
+    pwmWrite    (pin, range / 2) ;
   }
 }
 

From fa1628c7aa98a7d4900cad870f6aa1d4c0bda197 Mon Sep 17 00:00:00 2001
From: El Jeffo <mirage@rateaprof.com>
Date: Sun, 27 Sep 2015 22:33:27 +0900
Subject: [PATCH 2/3] Update frequency base to output more accurate tones

---
 wiringPi/wiringPi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wiringPi/wiringPi.c b/wiringPi/wiringPi.c
index 7e1c3a2..0f6ed22 100755
--- a/wiringPi/wiringPi.c
+++ b/wiringPi/wiringPi.c
@@ -2319,7 +2319,7 @@ void pwmToneWrite (int pin, int freq)
     pwmWrite (pin, 0) ;             // Off
   else
   {
-    range = 600000 / freq ;
+    range = 200000 / freq ;
     pwmSetRange (range) ;
     pwmWrite    (pin, range / 2) ;
   }

From 095aab26fbe3cf503b260f734dc738644fdc0302 Mon Sep 17 00:00:00 2001
From: El Jeffo <mirage@x2o.net>
Date: Tue, 29 Sep 2015 10:04:00 +0000
Subject: [PATCH 3/3] Example CLI script to play tones

---
 build                |  2 +-
 examples/cli_song.sh | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)
 mode change 100644 => 100755 build
 create mode 100755 examples/cli_song.sh

diff --git a/build b/build
old mode 100644
new mode 100755
index 7a2126e..88662fc
--- a/build
+++ b/build
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # check if sudo is required and save the result as ${PFX}:
 [[ ${EUID} -ne 0 ]] && PFX='sudo ' || PFX=''
diff --git a/examples/cli_song.sh b/examples/cli_song.sh
new file mode 100755
index 0000000..4e682a5
--- /dev/null
+++ b/examples/cli_song.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Example of how to export PWM Pin and play tones via CLI
+
+export WIRINGPI_DEBUG=true 
+export WIRINGPI_CODES=true 
+GPIO=../gpio/gpio
+
+$GPIO export 1 out
+$GPIO mode 1 pwm
+$GPIO pwmTone 1 1033
+
+for i in 262 523 220 440 233 466 0 0 262 523 220 440 233 466 0 0 175 349 147 294 156 311 0 0 175 349 147 294 156 311 0 0 311 277 294 277 311 311 208 196 277 262 370 349 165 466 440 415 311 247 233 220 208 0 0 0 ; do 
+	$GPIO pwmTone 1 $i;
+	sleep 0.15;
+done