This is a library for the PCA9555 I2C Port Expanders and is based on Adafruits MCP23017 library
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Written by Carter Nelson for Adafruit Industries. BSD license, check license.txt for more information All text above must be included in any redistribution
When using single pin operations such as pinMode(pinId, dir) or digitalRead(pinId) or digitalWrite(pinId, val) then the pins are addressed using the ID's below. For example, for set the mode of PB0 then use pinMode(8, ...).
| PCA9555 Pin # | Pin ID |
|---|---|
| 0 | PA0 |
| 1 | PA1 |
| 2 | PA2 |
| 3 | PA3 |
| 4 | PA4 |
| 5 | PA5 |
| 6 | PA6 |
| 7 | PA7 |
| 8 | PB0 |
| 9 | PB1 |
| 10 | PB2 |
| 11 | PB3 |
| 12 | PB4 |
| 13 | PB5 |
| 14 | PB6 |
| 15 | PB7 |