mongoose-ds3231

Mongoose OS I2C driver for the DS3231 real-time clock.

Overview

This driver enables control of the DS3231 real-time clock over I2C on Mongoose OS. This only supports time functions and alarms are not currently implemented.

Setup

1. Copy the ds3231 directory into the firmware's src directory and add it to the sources section of mos.yml
2. Enable the Mongoose OS I2C connection by adding ["i2c.enable", true], in conf_schema.yaml
3. Include the header "ds3231/ds3231.h" in the appropriate places

Usage

Setting the current date and time

// Sunday, June 11, 2017 1:30:00 PM
const struct datetime dt = {
	.second = 0,
	.minute = 30,
	.hour = 13,
	.weekday = 7,
	.day = 11,
	.month = 6,
	.year = 2017
};

ds3231_set_datetime(&dt);

Getting the current date and time

struct datetime dt;

ds3231_get_datetime(&dt);

Checking for power loss

if (ds3231_lost_power()) {
	// Power lost...
}