Yilin Sun
763d32be90
Signed-off-by: Yilin Sun <imi415@imi.moe> |
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.. | ||
armgcc | ||
FreeRTOSConfig.h | ||
board.c | ||
board.h | ||
clock_config.c | ||
clock_config.h | ||
dcd.c | ||
dcd.h | ||
evkmimxrt1020_sdram_init.jlinkscript | ||
freertos_sem.c | ||
freertos_sem_v3_14.xml | ||
pin_mux.c | ||
pin_mux.h | ||
readme.md |
readme.md
Overview
This document explains the freertos_sem example, what to expect when running it and a brief introduction to the API. The freertos_sem example code shows how semaphores works. Two different tasks are synchronized in bilateral rendezvous model.
The example uses four tasks. One producer_task and three consumer_tasks. The producer_task starts by creating of two semaphores (xSemaphore_producer and xSemaphore_consumer). These semaphores control access to virtual item. The synchronization is based on bilateral rendezvous pattern. Both of consumer and producer must be prepared to enable transaction.
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
- EVK-MIMXRT1020 board
- Personal Computer
Board settings
No special settings are required.
Prepare the Demo
- Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
- Open a serial terminal with the following settings:
- 115200 baud rate
- 8 data bits
- No parity
- One stop bit
- No flow control
- Download the program to the target board.
- Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Note: To debug in qspiflash, following steps are needed:
- Select the flash target and compile.
- Set the SW8: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J23.
- Start debugging in IDE.
- Keil: Click "Download (F8)" to program the image to qspiflash first then clicking "Start/Stop Debug Session (Ctrl+F5)" to start debugging. Running the demo ================ After the board is flashed the Tera Term will show debug console output.
Example output: Producer_task created. Consumer_task 0 created. Consumer_task 1 created. Consumer_task 2 created. Consumer number: 0 Consumer 0 accepted item. Consumer number: 1 Consumer number: 2 Producer released item. Consumer 0 accepted item. Producer released item. Consumer 1 accepted item. Producer released item. Consumer 2 accepted item.