MCUXpresso_MIMXRT1052xxxxB/boards/evkbimxrt1050/freertos_examples/freertos_event

Overview

This document explains the freertos_event example. It shows how task waits for an event (defined set of bits in event group). This event can be set by any other process or interrupt in the system.

The example application creates three tasks. Two write tasks write_task_1 and write_task_2 continuously setting event bit 0 and bit 1.

Read_task is waiting for any event bit and printing actual state on console. Event bits are automatically cleared after read task is entered.

Three possible states can occurre: Both bits are set.z Bit B0 is set. Bit B1 is set.

SDK version

• Version: 2.15.000

Toolchain supported

• IAR embedded Workbench 9.40.1
• GCC ARM Embedded 12.2
• Keil MDK 5.38.1
• MCUXpresso 11.8.0

Hardware requirements

• Mini/micro USB cable
• EVKB-IMXRT1050 board
• Personal Computer

Board settings

No special settings are required.

Prepare the Demo

1. Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
2. Open a serial terminal with the following settings:
   • 115200 baud rate
   • 8 data bits
   • No parity
   • One stop bit
   • No flow control
3. Download the program to the target board.
4. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo. Running the demo ================ After the board is flashed the Tera Term will start printing the state of event bits.

Example output: Bit B1 is set. Bit B0 is set. Bit B1 is set. Bit B0 is set. Bit B1 is set