C# device driver for MCP23017/MCP23S17
There are 3 different interfaces to use
- 1 bit individual pin manipulation with the Pin class
- 8 bit port register manipulation with the Port class
- 16 bit full microchip manipulation with the Device class
Each port supports read/write from cache and to queue with commits independently.
When the UseCaching property is not set (which is default), read and write commands will be issued for every interaction that requires it.
When using caching, you are responsible for calling Commit() when done writing. Switching UseCaching off will not commit any queued writes, but you can still call Commit().
Reads will reflect the latest written values even before committing and queued writes cannot be discarded, but can be overwritten with new values before committing to hardware.
Use Update(register) to update the cache with fresh reads. This is required to detect changes to GPIO when UseCaching is set.
Setting the IOCON bank flag will change the chip's internal registry address mapping. This is accounted for but not much useful without sequential operation mode.
- This driver does not come with an I²C or SPI controller. It is an abstraction of top of any communication pipeline implementation of your chosing.
- Sequential operations are not yet implemented.
- OnChange C# events not yet implemented.
Please take the time to raise issues for bugs or desired features, thank you.