I double checked wiring, but it was correct. I had built a wood box for the project (supposed to be Xmas gift) fed the wires back to the breadboard one last time before soldering, and the clock stopped working, with the clock failing to recognize any time. Worked fine for several months on a breadboard.
Ds3231 use as timer code#
The C code below was tested with CCS C compiler version 5.051.I was working on a clock project where I am using the Precision RTC DS3231. Real time clock & calendar with PIC18F4550 and DS3231 C code: In this project the PIC18F4550 uses its internal oscillator and MCLR pin function is disabled.
The circuit can work without this battery but its pin (#14) has to be grounded. The 3V cell battery is used as a backup to keep time and date running in case of main power failure. The button B1 selects the parameter and B2 increments the selected parameter. In the circuit there are 2 push buttons (B1 & B2) connected to pin RB2 and pin RB3, the two push buttons are used to set the time as well as the calendar parameters (minutes, hours, date……). The 1602 LCD has 7 data lines which are connected to pins RD0~6, the DS3231 SCL pin is connected to pin RB1 (#34) and SDA is connected to pin RB0 (#33) of the PIC18F4550 microcontroller. Real time clock & calendar with PIC18F4550 and DS3231 circuit: The I2C protocol uses only two lines: SCL (Serial Clock) and SDA (Serial Data) which are in the PIC18F4550 pin RB1 and pin RB0 respectively.ĭS3231 board contains the following components: The DS3231 uses I2C protocol to interface with the master device which is in our example the PIC18F4550 which has one I2C module.
Ds3231 use as timer how to#
This project shows how to build is simple real time clock and calendar (RTCC) using PIC18F4550 microcontroller and DS3231. The characteristics of the DS3231 make it one of the best choices for real time clock chips. The DS3231 is a low cost, extremely accurate real time clock with a built-in crystal oscillator.
Ds3231 use as timer pdf#
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