This directory contains a fully-featured Modbus RTU slave implementation for AVR microcontrollers (ATmega328p) utilizing around 3.7kB of the flash memory.
You can provide different configuration options to make in order to customize the build:
| Variable | Default | Description |
|---|---|---|
MCU |
atmega328p |
MCU type |
F_CPU |
8000000UL |
Clock speed |
BAUD_RATE |
9600 |
USART0 baudrate |
SLAVE_ADDRESS |
1 |
Address of the slave |
REG_COUNT |
32 |
Number of registers |
MAX_REQUEST |
64 |
Max request length |
MAX_RESPONSE |
64 |
Max response length |
This implementation uses USART0 for communication with the master. You can use the linuxmaster program from the examples directory to interact with the slave.