Libraries for MCP23S08 & MCP23008 Expanders

[AlbertoFS]

Software libraries for MCP23S08/MCP23008 expanders. These allow them to be used with all PICs.

[AlbertoFS]

It is an update of the MCP23008/MCP23S08 expanders software libraries.

I have simplified the configuration so that the user cannot make mistakes. The user must configure 3 parameters only [Inputs or outputs]/[Inputs polarity]/[PullUps resistors]. Now the library is more easy to use and there more controls that make the code more secure.
I have written a simpler solution to get around the crazy double interrupt.
 
By interrupt, reading of the port is carried out with a delay of 35mS to avoid the bounces of the input sensors.
Several interrupts can be achieved even if a sensor is left in the closed position.
The user will just need to overcome the initialization of the expander. Any fault will indicate the need to check the wiring.