Experience the next level of accuracy and synchronization in your projects with DS2417 and PIC32MZ2048EFM100
Let's make every millisecond count!
Published Nov 02, 2023
Click board™
RTC 4 Click
Dev Board
Curiosity PIC32 MZ EF
Compiler
NECTO Studio
MCU
PIC32MZ2048EFM100
Enhance your profitability and efficiency with our real-time clock solution, delivering reliable timekeeping for your critical applications
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Hardware Overview
How does it work?
RTC 4 Click is based on the DS2417, a real-time clock from Analog Devices, offering a simple solution for storing and retrieving vital time information with minimal hardware. The DS2417 contains a real-time clock/calendar implemented as a 32-bit binary counter and a unique factory-lasered 64-bit registration number, allowing multiple Click boards™ to be connected on the same data line. It communicates with the host MCU through a standard Dallas Semiconductor 1-Wire interface (16.3kbps). It has a clock accuracy of ±2 minutes per month at a 25 degrees Celsius temperature and a clock frequency derived from an onboard 32.768kHz oscillator. The DS2417's data is nonvolatile and can be used for stand-alone operation thanks to a backup energy source
(an onboard coin cell supercapacitor). The DS2417 adds functions such as a calendar, time and date stamp, and logbook to any electronic device or embedded microcontroller application. It can accumulate 136 years of seconds before rolling over, where time/date is represented by the number of seconds since a reference point, which the user determines. This Click board™ communicates with MCU using the 1-Wire interface that, by definition, requires only one data line (and ground) for communication with MCU. Without the main power supply, the data line can also power the sensor parasitically. The 1-Wire communication line is routed to the GP SEL jumper, allowing the 1-Wire communication signal to the PWM pin or the AN pin of the mikroBUS™
socket. These pins are labeled GP0 and GP1, respectively, the same as the SMD jumper positions, making selecting the desired pin straightforward. Besides, the DS2417 also includes an interrupt feature routed to the INT pin of the mikroBUS™ socket for system output. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
Curiosity PIC32 MZ EF development board is a fully integrated 32-bit development platform featuring the high-performance PIC32MZ EF Series (PIC32MZ2048EFM) that has a 2MB Flash, 512KB RAM, integrated FPU, Crypto accelerator, and excellent connectivity options. It includes an integrated programmer and debugger, requiring no additional hardware. Users can expand
functionality through MIKROE mikroBUS™ Click™ adapter boards, add Ethernet connectivity with the Microchip PHY daughter board, add WiFi connectivity capability using the Microchip expansions boards, and add audio input and output capability with Microchip audio daughter boards. These boards are fully integrated into PIC32’s powerful software framework, MPLAB Harmony,
which provides a flexible and modular interface to application development a rich set of inter-operable software stacks (TCP-IP, USB), and easy-to-use features. The Curiosity PIC32 MZ EF development board offers expansion capabilities making it an excellent choice for a rapid prototyping board in Connectivity, IOT, and general-purpose applications.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC32
MCU Memory (KB)
2048
Silicon Vendor
Microchip
Pin count
100
RAM (Bytes)
524288
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Curiosity PIC32 MZ EF as your development board.
Track your results in real time
Application Output
After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.
After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.
Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.
Software Support
Library Description
This library contains API for RTC 4 Click driver.
Key functions:
rtc4_get_interrupt- This function checks the interrupt state of the DS2417 Real time clock/calendar.rtc4_set_date_time- This function sets date and time structure along with interrupt interval.rtc4_get_date_time- This function gets RTC4 time and date structure.
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief RTC 4 Click Example.
*
* # Description
* This example demonstrates the use of the RTC 4 click board.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and logger and then sets the starting time
* to 23:59:50 and date to 31.12.2022.
*
* ## Application Task
* With the usage of rtc4_get_date_time we get the time and
* date from the register and display them on the UART Terminal.
* The counter increments once per second.
*
* @author Aleksandra Cvjetićanin
*
*/
#include "board.h"
#include "log.h"
#include "rtc4.h"
static rtc4_t rtc4;
static log_t logger;
rtc4_time_t time;
rtc4_date_t date;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
rtc4_cfg_t rtc4_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
rtc4_cfg_setup( &rtc4_cfg );
RTC4_MAP_MIKROBUS( rtc4_cfg, MIKROBUS_1 );
if ( ONE_WIRE_ERROR == rtc4_init( &rtc4, &rtc4_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( RTC4_ERROR == rtc4_check_communication ( &rtc4 ) )
{
log_error( &logger, " Check communication." );
for ( ; ; );
}
time.hours = 23;
time.min = 59;
time.sec = 50;
date.day = 31;
date.month = 12;
date.year = 2022;
rtc4_set_date_time ( &rtc4, &date, &time, RTC4_DCB_INTERVAL_1S );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
while ( rtc4_get_interrupt ( &rtc4 ) );
if ( RTC4_OK == rtc4_get_date_time ( &rtc4, &date, &time ) )
{
log_printf( &logger, "Time: %.2u:%.2u:%.2u\r\n",
( uint16_t ) time.hours, ( uint16_t ) time.min, ( uint16_t ) time.sec );
log_printf( &logger, "Date: %.2u/%.2u/%u\r\n",
( uint16_t ) date.day, ( uint16_t ) date.month, ( uint16_t ) date.year );
log_printf( &logger, "------------------------\r\n\n");
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
