Unfortunately I couldn't find neither the MC with all my programs on it nor the Walkman to play back all that data.
So there it was - the idea to use my Arduino 'playing' some machine code source files while the Micro-Professor is 'listening' on its tape reader interface!
|Arduino Mega 2560|
The tape file format is described in the MPF-1 Manual as shown here:
So, there are some tones to be generated. To be exact, there is a 2kHz and a 1kHz tone, sequenced according the file, byte and bit formats described as seen above in Fig. 4-7.
The Arduino Sketch is the first prototype implementation of a Micro-Professor Tape File Generator.
The Arduino Sketch defines Pin 12 to be the audio output which has to be connected to the MPF-1 EAR audio input jack (also connect Arduino GND to MPF-1 GND).
The following schematic depicts how a stereo mini jack wiring shall be prepared:
How do you realize the interface between your arduino and you MPF-1 ? I saw you use pin 12 but it is 5v, the input of the MPF-1 is an audio format.
thank you for your work.
I just directly attach the Arduino Pin 12 (which is a 5V output) to the MPF-1 EAR audio input (see the added schematic in the article).
Hi Niklaus, I wanted to write files to my MPF-1, tried using a WAV recorder but no success, so I was going to write some Arduino code to do the job but couldnt spare the time. Thought Id have a search to see if someone had already done it. Suprised to find your code and greatful it worked first time without a problem, well commented and easy to understand, thanks.AntwortenLöschen
Thank you for your feedback! Glad that it helps!