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authorFlorian Pritz <bluewind@xinu.at>2013-01-16 21:43:28 +0100
committerFlorian Pritz <bluewind@xinu.at>2013-01-16 21:43:28 +0100
commitf6c2485f49613617605474ba7ef2a78471ba1fd0 (patch)
tree6cc1da1fdedbf0eb0e79ff6882c5c26157577fa6
downloadmpd-box-f6c2485f49613617605474ba7ef2a78471ba1fd0.tar.gz
mpd-box-f6c2485f49613617605474ba7ef2a78471ba1fd0.tar.xz
initial commit
Signed-off-by: Florian Pritz <bluewind@xinu.at>
-rw-r--r--.gitignore1
-rw-r--r--COPYING339
-rwxr-xr-xdaemon.py130
-rw-r--r--lib/.holder0
-rw-r--r--src/Bounce.cpp90
-rw-r--r--src/Bounce.h71
-rw-r--r--src/main.cpp65
7 files changed, 696 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..24e5b0a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.build
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..d159169
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,339 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
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+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
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+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
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+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
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+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
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+ 2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
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+ a) You must cause the modified files to carry prominent notices
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+
+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
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+ c) If the modified program normally reads commands interactively
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+ interactive use in the most ordinary way, to print or display an
+ announcement including an appropriate copyright notice and a
+ notice that there is no warranty (or else, saying that you provide
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+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
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+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
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+Thus, it is not the intent of this section to claim rights or contest
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+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
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+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
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+
+ 5. You are not required to accept this License, since you have not
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+distribute the Program or its derivative works. These actions are
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+the Program or works based on it.
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+ 6. Each time you redistribute the Program (or any work based on the
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+original licensor to copy, distribute or modify the Program subject to
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+infringement or for any other reason (not limited to patent issues),
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+license would not permit royalty-free redistribution of the Program by
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+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
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+It is not the purpose of this section to induce you to infringe any
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+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
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+to distribute software through any other system and a licensee cannot
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+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
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+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/daemon.py b/daemon.py
new file mode 100755
index 0000000..a66c8c5
--- /dev/null
+++ b/daemon.py
@@ -0,0 +1,130 @@
+#!/usr/bin/python
+
+import serial
+import mpd
+import time
+import sys
+
+class Config:
+ display_lines = 2
+ display_width = 16
+ display_length = display_lines * display_width
+
+class Daemon:
+ line = ""
+ playing = False
+
+ def __init__(self):
+ self.ser = serial.Serial(sys.argv[1], 9600, timeout=1)
+
+ # raise timeout to let arduino start up
+ self.ser.timeout = 15
+ incoming = self.readline()
+
+ # arduino sometimes has a dirty buffer
+ # and sends junk before the ready message
+ if not incoming.endswith("ready"):
+ sys.stderr.write("Got unexpected reply: "+incoming)
+ raise Exception("Wrong client greeting")
+ self.ser.timeout = 1
+
+ self.client = mpd.MPDClient()
+ self.client.connect("localhost", 6600)
+
+ def readline(self):
+ return self.ser.readline().decode("ascii").strip()
+
+ def update(self):
+ old_line = self.line
+ old_playing = self.playing
+ changed = False
+
+ incoming = self.client.currentsong()
+
+ self.line = incoming["artist"] + " - " + incoming["title"]
+ if self.line != old_line:
+ changed = True
+
+ self.playing = self.client.status()["state"] == "play"
+ if self.playing != old_playing:
+ changed = True
+
+ return changed
+
+ def run(self):
+ self.update()
+
+ last_display_update = 0.0
+ last_song_update = 0.0
+ now = 0.0
+ time_diff = 0.0
+ current_position = 0
+
+ while 1:
+ now = time.time()
+
+ # check for incoming commands from arduino
+ if self.ser.inWaiting() > 0:
+ incoming = self.readline()
+
+ functions = {
+ "next": self.client.next,
+ "previous": self.client.previous,
+ "pause": self.client.pause,
+ }
+ try:
+ func = functions[incoming]
+ func()
+
+ # force redraw if anything changed
+ if self.update():
+ last_display_update = 0
+ current_position = 0
+
+ except KeyError:
+ pass
+
+ # check if song changed
+ # TODO: use idle and poll (more often)?
+ time_diff = now - last_song_update
+ if time_diff > 2.5 or time_diff < -60.0:
+ last_song_update = now
+ if self.update():
+ last_display_update = 0
+ current_position = 0
+
+ # update arduino display
+ time_diff = now - last_display_update
+ if time_diff > 0.8 or time_diff < -60.0:
+ last_display_update = now
+ if self.playing:
+ i = current_position
+
+ if i - 1 + Config.display_length == len(self.line):
+ i = 0
+
+ if i == 0:
+ # allow people to start reading
+ last_display_update += 2
+
+ if len(self.line) > Config.display_length:
+ buf = self.line[i:i+Config.display_length]
+ else:
+ buf = self.line.ljust(Config.display_length, " ")
+
+ i += 1
+ current_position = i
+ else:
+ buf = "-- PAUSED --".center(Config.display_width, " ").ljust(Config.display_length, " ")
+
+ # always start at the beginning if we unpause
+ current_position = 0
+
+ print("'" + buf + "'")
+ self.ser.write(bytes(buf, "ascii", "replace"))
+
+ time.sleep(0.05)
+
+if __name__ == '__main__':
+ d = Daemon()
+ d.run()
diff --git a/lib/.holder b/lib/.holder
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/lib/.holder
diff --git a/src/Bounce.cpp b/src/Bounce.cpp
new file mode 100644
index 0000000..40709e4
--- /dev/null
+++ b/src/Bounce.cpp
@@ -0,0 +1,90 @@
+
+// Please read Bounce.h for information about the liscence and authors
+
+#include <Arduino.h>
+#include "Bounce.h"
+
+Bounce::Bounce() {
+}
+
+Bounce::Bounce(uint8_t pin,unsigned long interval_millis)
+{
+ interval(interval_millis);
+ previous_millis = millis();
+ state = digitalRead(pin);
+ this->pin = pin;
+}
+
+
+void Bounce::write(int new_state)
+ {
+ this->state = new_state;
+ digitalWrite(pin,state);
+ }
+
+
+void Bounce::interval(unsigned long interval_millis)
+{
+ this->interval_millis = interval_millis;
+ this->rebounce_millis = 0;
+}
+
+void Bounce::rebounce(unsigned long interval)
+{
+ this->rebounce_millis = interval;
+}
+
+
+
+int Bounce::update()
+{
+ if ( debounce() ) {
+ rebounce(0);
+ return stateChanged = 1;
+ }
+
+ // We need to rebounce, so simulate a state change
+
+ if ( rebounce_millis && (millis() - previous_millis >= rebounce_millis) ) {
+ previous_millis = millis();
+ rebounce(0);
+ return stateChanged = 1;
+ }
+
+ return stateChanged = 0;
+}
+
+
+unsigned long Bounce::duration()
+{
+ return millis() - previous_millis;
+}
+
+
+int Bounce::read()
+{
+ return (int)state;
+}
+
+
+// Protected: debounces the pin
+int Bounce::debounce() {
+
+ uint8_t newState = digitalRead(pin);
+ if (state != newState ) {
+ if (millis() - previous_millis >= interval_millis) {
+ previous_millis = millis();
+ state = newState;
+ return 1;
+ }
+ }
+
+ return 0;
+
+}
+
+// The risingEdge method is true for one scan after the de-bounced input goes from off-to-on.
+bool Bounce::risingEdge() { return stateChanged && state; }
+// The fallingEdge method it true for one scan after the de-bounced input goes from on-to-off.
+bool Bounce::fallingEdge() { return stateChanged && !state; }
+
diff --git a/src/Bounce.h b/src/Bounce.h
new file mode 100644
index 0000000..68cdbd8
--- /dev/null
+++ b/src/Bounce.h
@@ -0,0 +1,71 @@
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ Main code by Thomas O Fredericks
+ Rebounce and duration functions contributed by Eric Lowry
+ Write function contributed by Jim Schimpf
+ risingEdge and fallingEdge contributed by Tom Harkaway
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef Bounce_h
+#define Bounce_h
+
+#include <inttypes.h>
+
+class Bounce
+{
+
+public:
+ // Initialize
+ Bounce();
+ Bounce(uint8_t pin, unsigned long interval_millis );
+ // Sets the debounce interval
+ void interval(unsigned long interval_millis);
+ // Updates the pin
+ // Returns 1 if the state changed
+ // Returns 0 if the state did not change
+ int update();
+ // Forces the pin to signal a change (through update()) in X milliseconds
+ // even if the state does not actually change
+ // Example: press and hold a button and have it repeat every X milliseconds
+ void rebounce(unsigned long interval);
+ // Returns the updated pin state
+ int read();
+ // Sets the stored pin state
+ void write(int new_state);
+ // Returns the number of milliseconds the pin has been in the current state
+ unsigned long duration();
+ // The risingEdge method is true for one scan after the de-bounced input goes from off-to-on.
+ bool risingEdge();
+ // The fallingEdge method it true for one scan after the de-bounced input goes from on-to-off.
+ bool fallingEdge();
+
+protected:
+ int debounce();
+ unsigned long previous_millis, interval_millis, rebounce_millis;
+ uint8_t state;
+ uint8_t pin;
+ uint8_t stateChanged;
+};
+
+#endif
+
+
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..30f2b87
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,65 @@
+#include <Arduino.h>
+#include <LiquidCrystal.h>
+#include "Bounce.h"
+
+void setup();
+void loop();
+
+#define BUFFER_SIZE 64
+char buf[BUFFER_SIZE];
+
+// initialize the library with the numbers of the interface pins
+LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
+
+// A0 = prev; A1 = pause; A2 = next
+byte buttons[] = {A0, A1, A2};
+#define NUMBUTTONS sizeof(buttons)
+#define DEBOUNCE 10
+Bounce bounce_buttons[NUMBUTTONS];
+
+void setup() {
+ byte i;
+ lcd.begin(16, 2);
+ Serial.begin(9600);
+ Serial.setTimeout(5000);
+
+ for (i = 0; i < NUMBUTTONS; i++) {
+ pinMode(buttons[i], INPUT);
+ digitalWrite(buttons[i], HIGH);
+ bounce_buttons[i] = Bounce(buttons[i], DEBOUNCE);
+ }
+
+ Serial.println("ready");
+}
+
+bool button_just_pressed(int i) {
+ bounce_buttons[i].update();
+ return bounce_buttons[i].fallingEdge();
+}
+
+void loop() {
+ if (button_just_pressed(0)) {
+ Serial.println("previous");
+ }
+
+ if (button_just_pressed(1)) {
+ Serial.println("pause");
+ }
+
+ if (button_just_pressed(2)) {
+ Serial.println("next");
+ }
+
+ // output what we got over serial
+ if (Serial.available() >= 32) {
+ lcd.setCursor(0, 0);
+ Serial.readBytes(buf, 32);
+ for (int i = 0; i < 32; i++) {
+ if (i == 16) {
+ lcd.setCursor(0, 1);
+ }
+ lcd.write(buf[i]);
+ }
+ }
+}
+