The purpose of this project is to create a serial programmable relay controller (PLC similar). Taking advantage of the Microchip's Technology AVR128DB48 microcontroller characteristics.
The second parallel purpose is to demonstrate the C language bare metal programming for this microcontroller family using the AVR-GCC compiler and the Visual Studio Based IDE: Microchip Studio.
The target, the user will be able to:
- Command and program the controller via a USART CLI.
- Program Time based routines using the I2C RTC.
- Program temperature treshold based routings.
As 02/04/2023 the firmware allows the user to change the state of the relays manually using a USART CLI with argumented commands.
The USART peripheral is configured to operate by interruption service routines. Leaving the main loop empty, this will help for future low power configurations.
For example:
$ ctrl 1,3 -tgl
All commands must start with the $ sign, then the main command, followed by the selected elements and finally the operations, the above command will toggle the state of the selected relays.
More Command examples
$ ctrl 1,3,4 -on Will turn ON the selected Relays
$ ctrl 3,4 -off Will turn OFF the selected Relays
These instructions will guide you to get copy of the project up and running on your local machine for development and testing purposes.
The project is developed around the following development boards:
Microchip Technology
MIKROE
Requirements for the software and other tools to build.
- Microchip Studio 7.0.2594
- AVR-Dx_DFP 2.2.253
- GCC AVR 8-Bit Toolchain (Windows) 3.7.0
- MPLAB® Data Visualizer
- Ricardo Zamudio - JustZeus
Released under MIT License
- The code in this Repo is based in the application notes from the engineering team at Microchip Technology.