The example application provides a port of the FreeRTOS
kernel and demonstrates how to build a basic application using the ATmega4809
AVR® microcontroller, and how to trace the code run time
using Percepio Tracealyzer 4.
Having trace capabilities gives you real-time insight into the behavior of the
system to ease development, debugging, validation and optimization of the code.
- Runs at 3.3V and 10 MHz
- The application will blink LED0 on
ATmega4809 Xplained Pro
- Use SW0 on the ATmega4809 Xplained Pro to toggle between views on the OLED display
- Use SW1 on the ATmega4809 Xplained Pro to trigger an external interrupt
- Welcome View
- Displays device and FreeRTOS
information
- Displays how to switch between views
and trigger the ISR
- When the Welcome view is active, the
buttons on the OLED1 Xplained Pro have no function
- Time and Temperature View
- Displays time and temperature of the
device
- In this view, while holding down
Button 2 it is possible to adjust the time using Button 1 (hours) and Button 3
(minutes)
- Bubble Sort and Quick Sort
Views
- In both these views, 100% of the CPU
is used for sorting unless any higher or same priority tasks are ready
- The OLED displays in text and bar
graph how many sorts/sec the device can do on a array of 30 integers
- The user can keep the CPU busy by
pushing buttons 1-3 multiple times and see the bar graph change as sorts/sec goes
down
- Pushing SW1 will suspend the current
sorting task and update the OLED display
- Pushing SW1 again will resume the
task