SimpleSDAudio: Unterschied zwischen den Versionen
Aus Hackerspace Ffm
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== Features == | == Features == | ||
| − | * 8-Bit PWM output | + | * 8-Bit PWM output - no external DAC required |
| − | * 62.500 kHz ( | + | * 62.500 kHz (fullrate) / 31.250 kHz (halfrate) sampling rate @ 16 MHz |
| − | * 31.250 kHz ( | + | * 31.250 kHz (fullrate) / 15.625 kHz (halfrate) sampling rate @ 8 Mhz |
| + | * Mono, bridge and stereo mode | ||
* RAM usage ~1.3 kByte | * RAM usage ~1.3 kByte | ||
* ROM usage ~6.1 kByte | * ROM usage ~6.1 kByte | ||
| − | * | + | * Integrated SD library (minimal FAT only, optimized for low RAM usage and high performance) |
| + | * Works with most SD card shields that are hooked to SPI port | ||
* Easy to use: 1. init library, 2. select audio file, 3. call play, 4. call worker while audio is playing | * Easy to use: 1. init library, 2. select audio file, 3. call play, 4. call worker while audio is playing | ||
| + | * Supports SD and SDHC cards formated with FAT16 or FAT32 | ||
| − | == | + | == Restrictions == |
| + | * Audio file must be converted prior use | ||
| + | * Audio files must reside in root directory of card | ||
| + | * File name of audio file must be in 8.3-format | ||
| + | * Audio file must reside completely non-fragmented on card | ||
| + | * fullrate and stereo actually leads to buffer underruns | ||
| + | |||
| + | == Quickstart guide == | ||
| + | * Install library: Unzip all to your /libraries/ folder. | ||
| + | * Copy file /libraries/SimpleSDAudio/examples/example.raw to root folder of a freshly formated SD card (don't use quick format!) | ||
| + | * Connect SD card to your Arduino board (using shield or whatever, SD card's chip select should go to pin 4, all other to SPI pins) | ||
| + | * Connect a speaker, headphone or line-in via 100 ohm resistor in series to audio output pin (pin 9 on Arduinos with ATmega168/328, pin 44 on Arduinos with ATmega1280/2560). Connect other end of speaker/ground of line-in to GND | ||
| + | * Launch Arduino IDE and try example "BareMinimumWithDebug" first | ||
| + | * You should hear some audio. Activate serial monitor to find some information if it does not work. Maybe you have to adjust SD cards CS pin in sketch. | ||
| + | |||
| + | == Software installation guide == | ||
| + | |||
| + | |||
| + | |||
| + | == Preparation of SD card and conversion of audio files == | ||
| + | |||
| + | == Hardware setup == | ||
Version vom 26. Juni 2012, 20:10 Uhr
Play audio files with your Arduino in decent quality from SD card, only very few additional hardware required.
Inhaltsverzeichnis
Features
- 8-Bit PWM output - no external DAC required
- 62.500 kHz (fullrate) / 31.250 kHz (halfrate) sampling rate @ 16 MHz
- 31.250 kHz (fullrate) / 15.625 kHz (halfrate) sampling rate @ 8 Mhz
- Mono, bridge and stereo mode
- RAM usage ~1.3 kByte
- ROM usage ~6.1 kByte
- Integrated SD library (minimal FAT only, optimized for low RAM usage and high performance)
- Works with most SD card shields that are hooked to SPI port
- Easy to use: 1. init library, 2. select audio file, 3. call play, 4. call worker while audio is playing
- Supports SD and SDHC cards formated with FAT16 or FAT32
Restrictions
- Audio file must be converted prior use
- Audio files must reside in root directory of card
- File name of audio file must be in 8.3-format
- Audio file must reside completely non-fragmented on card
- fullrate and stereo actually leads to buffer underruns
Quickstart guide
- Install library: Unzip all to your /libraries/ folder.
- Copy file /libraries/SimpleSDAudio/examples/example.raw to root folder of a freshly formated SD card (don't use quick format!)
- Connect SD card to your Arduino board (using shield or whatever, SD card's chip select should go to pin 4, all other to SPI pins)
- Connect a speaker, headphone or line-in via 100 ohm resistor in series to audio output pin (pin 9 on Arduinos with ATmega168/328, pin 44 on Arduinos with ATmega1280/2560). Connect other end of speaker/ground of line-in to GND
- Launch Arduino IDE and try example "BareMinimumWithDebug" first
- You should hear some audio. Activate serial monitor to find some information if it does not work. Maybe you have to adjust SD cards CS pin in sketch.
