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arduino:arduino_mkrzero [2020/12/14 18:10]
admin [Simple Audio Player] 		arduino:arduino_mkrzero [2021/01/30 15:16] (current)
admin [Li-Po Battery]
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 [[https://store.arduino.cc/arduino-mkr-zero-i2s-bus-sd-for-sound-music-digital-audio-data?queryID=undefined|Arduino MKR ZERO (I2S bus & SD for sound, music & digital audio data)]]\\ [[https://store.arduino.cc/arduino-mkr-zero-i2s-bus-sd-for-sound-music-digital-audio-data?queryID=undefined|Arduino MKR ZERO (I2S bus & SD for sound, music & digital audio data)]]\\
  
-On Arch Linux it needs more than one attempt to upload the code, the /dev/ttyACM0 can't be opened: **No device found on ttyACM0**!\\ +A great description and general information about the SAMD21 one could find here: [[https://learn.sparkfun.com/tutorials/samd21-minidev-breakout-hookup-guide/samd21-overview|SpartkFun SAMD21 Overview]]\\ 
 ---- ----
 ==== Installation ==== ==== Installation ====
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 or\\ or\\
 [[https://github.com/adafruit/SD/archive/master.zip|Arduino SD Library by Adafruit]]\\ [[https://github.com/adafruit/SD/archive/master.zip|Arduino SD Library by Adafruit]]\\
 +
 +On Arch Linux it needs more than one attempt to upload the code, the /dev/ttyACM0 can't be opened: **No device found on ttyACM0**!\\ 
  
 ---- ----
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 In open/libraries/ArduinZero one finds the SimpleAudioPlayerZero example.\\ In open/libraries/ArduinZero one finds the SimpleAudioPlayerZero example.\\
-These comands one need:\\+These commands are needed:\\
    SD.begin(28);   //Initializes the SD library and card    SD.begin(28);   //Initializes the SD library and card
    AudioZero.begin(2*44100);   //Initializes the DAC, 44100kHz stereo => 88200 sample rate    AudioZero.begin(2*44100);   //Initializes the DAC, 44100kHz stereo => 88200 sample rate
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 [[https://www.arduino.cc/en/Tutorial/SimpleAudioPlayerZero|Simple audio player]]\\ [[https://www.arduino.cc/en/Tutorial/SimpleAudioPlayerZero|Simple audio player]]\\
-The quality of the WAV file needs to be 88200 Hz mono, 8-bit unsigned PCM.\\+The quality of the WAV file needs to be 44100kHz stereo and decoded with 8-bit unsigned PCM.\\
 The audio signal is on pin DAC0/A0.\\ The audio signal is on pin DAC0/A0.\\
  
 **Some bugs are in the original code!**\\ **Some bugs are in the original code!**\\
-- one needs a delay after Serial.begin\\+- one needs a short delay after Serial.begin\\
 - the SD-card pin is 28\\ - the SD-card pin is 28\\
 +
 here is the fixed code:\\ here is the fixed code:\\
 {{ :arduino:simpleaudioplayerzero_fixed.zip |SimpleAudioPlayerZero_Fixed}}\\ {{ :arduino:simpleaudioplayerzero_fixed.zip |SimpleAudioPlayerZero_Fixed}}\\
  
 +Unfortunately there is quite some bad humming after playing a file.\\
  
 ---- ----
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 <img src="https://content.arduino.cc/assets/Pinout-MKRZERO_latest.png"> <img src="https://content.arduino.cc/assets/Pinout-MKRZERO_latest.png">
 </html>\\ </html>\\
-//picture from [[https://www.arduino.cc/|Arduino.cc]]//\\+//pinout digram by [[https://www.arduino.cc/|Arduino.cc]]//\\
  
 The onboard LED is on pin 32. One could use LED_BUILTIN instead.\\ The onboard LED is on pin 32. One could use LED_BUILTIN instead.\\
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 </html> </html>
 //video from [[https://forcetronic.blogspot.com/2015/10/arduino-zero-dac-overview-and-waveform.html|ForceTronics - Arduino Zero DAC Overview and Waveform Generator Example]]//\\ //video from [[https://forcetronic.blogspot.com/2015/10/arduino-zero-dac-overview-and-waveform.html|ForceTronics - Arduino Zero DAC Overview and Waveform Generator Example]]//\\
 +
 +----
 +==== SWD pinout ====
 +
 +{{:arduino:arduinomkrzero_swdpinout_02.jpg?400|}}\\
  
 ---- ----
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 ---- ----
 +==== Further Informations ====
 +
 +[[https://learn.adafruit.com/adafruit-feather-m0-basic-proto/adapting-sketches-to-m0|
 +Adapting Sketches to M0 & M4 by Lady Ada]]\\
 +
 +[[https://www.omzlo.com/articles/your-arduino-samd21-adc-is-wrong-did-you-notice|Your Arduino SAMD21 ADC is wrong: did you notice? - omzlo.com]]\\
 +
 +[[https://webusb.github.io/arduino/|Arduino Web USB]]\\
 +
 +[[https://www.instructables.com/ATSAMD21g18-Bootloader-With-J-link-Debugger/|ATSAMD21g18 Bootloader With J-link Debugger
 +- instructable.com]]\\
 +
 +[[https://www.avdweb.nl/arduino/samd21/sam-15x15|Sam 15x15 - avdweb.nl]]\\
 +
 +----
 +
 ==== License ==== ==== License ====