Introduction

This library is to control the 6-Channel Electronic Volume Controller IC PT2258

PT2258 address

(1: connected to VCC, 0: connected to GND)

CODE1	CODE2	ADDRESS 8bit	ADDRESS 7bit
0	0	0x80	0x40
1	0	0x88	0x44
0	1	0x84	0x42
1	1	0x8C	0x46

The Wire library uses addresses with 7bit, so if you perform an I2C scan, the address will appear as right-shifted form the one specified above and in the data sheet. Example: I2C scan finds 0x44 -> this means that the PT2258 has the address 0x88

The default address used by the library is 0x88.

If you need to change it, crete the PT2258 object like this:

PT2258 pt2258(address); // where the address is a 8bit address (check the table for conversion)

Example: PT2258 pt2258(0x84);

Wire connection

The PT2258 is specified to work with a bus clock speed of 100kHz max.

Add Wire.setClock(100000); in the sutup before calling the begin() funtion for the PT2258.

Mute

The PT2258 has the mute on all the channels activated by default when it does power up as a safety measure.

When the mute is active, even if the volume is changed, the channels will remain silent.

Remember to deactivate the mute to ear the sound.

Initial volume

The PT2258 has the volume of all the channels at the maximum when it powers on (and the mute active as well, see "Mute" above).

Author

Created by Marco Lurati, April 21, 2023

License

MIT License

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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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