# touch_sense

Core that handles touch senor events and provides them SW via an API.

## Introduction

This core implements a touch sensor handler. The core detects and
holds events for SW to read. The touch sensor input is expected to be
a change in level from low (0) to high (1). When an event is seen, the
core will set a status bit that SW can read. SW must then clear the
event by writing to the status register.

The user is expected to lift the finger between multiple touch events.


## API

The API has a single address, and a single bit in that address:

```
	ADDR_STATUS: 0x09
	STATUS_EVENT_BIT: 0
```

SW should clear any stray attempts before signalling to the user that
a touch event is expected. Clearing an event is done by writing the
the status address, the value written does not matter.