1.8.1 1.28.1 Analog Comparator Controller (ACC)

The Analog Comparator Controller (ACC) configures the analog comparator and generates an interrupt depending on user settings. The analog comparator embeds two 8-to-1 multiplexers that generate two internal inputs. These inputs are compared, resulting in a compare output. The hysteresis level, edge detection and polarity are configurable. The ACC also generates a compare event which can be used by the Pulse Width Modulator (PWM).

Using The Library

The analog comparison status can be polled by the software or can be configured to generate a callback.

  • With polling, the application will need to continuously poll to check if the comparison edge occurred

  • With Callback, the registered callback function will be called when comparison edge is detected. This means the application do not have to poll continuously.

Library Interface

Analog Comparator Controller peripheral library provides the following interfaces:

Functions

Name Description
ACC_Initialize Initializes ACC module of the device
ACC_Enable Enables ACC peripheral
ACC_Disable Enables ACC peripheral
ACC_StatusGet Returns comparison status of the ACC
ACC_RegisterCallback Allows application to register callback with PLIB

Data types and constants

Name Type Description
ACC_STATUS_SOURCE Enum Identifies ACC Comparison status
ACC_CALLBACK Typedef ACC Callback function pointer