1.1 AC Sleepwalking

This example application shows how to use the AC peripheral library to perform a single shot comparison in standby sleep mode periodically and wake up the device at the end of a successful comparison.

Description

The single shot conversion is triggered by RTC compare event. Generation of a trigger and compare operation are done while the Central Processing Unit (CPU) is in the standby sleep mode. The AC generates the interrupt on the end of the comparison which wakes the CPU.

Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file.

Path of the application within the repository is apps/ac/ac_sleepwalk_singleshot.

To build the application, refer to the following table and open the project using its IDE.


Project Name	Description
pic32wm_bw1_curiosity.X	MPLAB X project for PIC32WM-BW1 Curiosity board

Setting Up the Hardware

The following table shows the target hardware for the application projects.


Project Name	Board
pic32wm_bw1_curiosity.X	PIC32WM-BW1 Curiosity board

Setting Up PIC32WM-BW1 Curiosity Board

Connect a voltage below VDD to Pin 4 of the XPRO Header 1
Connect the USB port on the board to the computer using a USB Type-C® cable

Running the Application

Open the Terminal application (E.g., Tera term) on the computer.
Connect to the USB COM port and configure the serial settings as follows:
- Baud : 115200
- Data : 8 Bits
- Parity : None
- Stop : 1 Bit
- Flow Control : None
Build and program the application using its IDE.
Observe output message in console as follows.
Console displays the message stating whether voltage at AC input is lower or greater than the internal bandgap voltage (1.1V).
LED toggles when comparison is done.

Refer to the following table for the AC input pin and LED name:


Board	AC Input Pin	LED Name
PIC32WM-BW1 Curiosity board	Pin 4 of the XPRO Header 1	Green LED