I'm making a project where i'm using a PS1 controller with the Psx library.
All works nice i receive values.
But i don't know how to use thoses values...
Each button send a value of a 2^n, so when you push more then one button you get a unique value which can only be obtained by a single combination of buttons.
I was wondering how can i know the combination with maths.
Thanks
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Code: --- |
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``` uint8_t value = 0b00010101; // The value received from the controller |
| const uint8_t n = 8; // Number of buttons (<= [nobbc]8)[/nobbc] |
| const uint8_t end = 1 << n; // The stop mask |
| for ( |
| uint8_t mask = 1, ctr = 1; |
| mask != end; |
| mask <<= 1, ++ctr |
| ) { |
| if (value & mask) { |
| Serial.print("Button "); |
| Serial.printcolor=#000000[/color]; |
| Serial.println(" is active"); |
| } |
|
} ``` |
This will print
Button 1 is active
Button 3 is active
Button 5 is active
Pieter