Files

copied
Last update 11 months 3 weeks
Files
avr
beaglebone
hardware
README
README
This project has the following feature set: - a smallish and spartan music player that can work for weeks between charges - a 2Ah Li-poly cell and an integrated charger - 5V input - decoding of ogg vorbis, mp3 files - microSD (SDHC) is the storage medium. so fat32 and cards bigger than 4G. there are 2 components in this repository: avr - contains the C source code for an Atmel-based microcontroller beaglebone - contains the C source code for beagle-bone (ARMv7)-based tools hardware - open source hardware for the main board the schematic is based on VLSI's Simple DSP Evaluation Board [1] Library dependencies for the avr code: if using the master branch: none (this is a fully standalone version) if using the old 'arduino' branch: sdfatlib http://code.google.com/p/sdfatlib/ vs1063 https://github.com/rodan/vs1063 IRremote https://github.com/shirriff/Arduino-IRremote Usage: - an RC5 remote control provides the control (a Vishay TSOP IR receiver's output goes to PD2). - by default music files are played randomly. the following buttons are configured: VOL- decrease volume VOL+ increase volume SUBTITLES switch between 4 levels of spatial processing (for headphones) REWIND switch to album mode CHANNEL- switch to artist mode CHANNEL+ next track in either of the modes STOP sends the player in low power shutdown mode. you need to start it again to exit this. NUMBERS 0-9 select artist (which directory from the root of the filesystem to play) AV disable artist selection Power consumption profile: - jumper/switch open - battery connected only to the charging circuit - < 3uA - normal file decoding - 30-40 mA - shutdown (after STOP ir command), IR sensor active - 800uA - after uC woken up by ir sensor trigger, waiting for a POWER ir sequence (for max 2 seconds) - 4.5mA (this mode has been disabled in the code) - if the stereo jack is unused or if the battery level goes below safe LiPo levels then the player enters shutdown mode. Known problems and limitations: - you should format the SDcard as Fat32 with largest available cluster size - no special chars must be used in the filesystem entries, only ascii alphanumeric chars - there is a hardcoded MAX_PATH that only allows about 4 parent dirs to any music file Tested with: - 16G Class 10 Adata card, with ogg files over the 4G barrier Author: Petre Rodan <2b4eda@subdimension.ro> Available from: https://github.com/rodan/playa Product pictures: https://photos.app.goo.gl/nUQuD7HJvfVBpMeQ9 License: GNU GPLv3 [1] http://www.vlsi.fi/en/support/evaluationboards/vs1053vs8053simpledspboard.html GNU GPLv3 license: 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 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
Report a bug