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================================================================================
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样例使用说明
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Sample Description
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================================================================================
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功能描述：
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此样例演示了FreeRTOS任务通知的相关API函数应用，实现模拟信号量、模拟事件标志组、
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模拟消息邮箱功能。通过串口log，观察任务通知模拟的实现过程。
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Function descriptions:
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This sample demonstrates the application of FreeRTOS task notification related
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API functions to implement the simulation of semaphores, simulation of event flag
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groups, and simulation of message mailbox functions. Observe the implementation
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process of task notification simulation through serial port log.
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================================================================================
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测试环境：
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测试用板：PY32F403_STK
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MDK版本：5.28
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IAR版本：9.20
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GCC版本：GNU Arm Embedded Toolchain 10.3-2021.10
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Test environment:
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Test board: PY32F403_STK
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MDK Version: 5.28
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IAR Version: 9.20
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GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10
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================================================================================
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使用步骤：
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1. 编译下载程序到MCU，并运行；
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2. 通过串口调试助手打印的log信息，观察任务执行过程。
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3. 打开宏定义NOTIFY_SEMAPHORE，关闭NOTIFY_NOTIFY_EVENTGROUPS和NOTIFY_MESSAGE。
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Task1: 任务通知每隔1s向任务2释放一个信号量。信号量总数加1。
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Task2: 任务2每隔2s获取一次信号量，获取成功，打印信号量的值。信号量总数减1。
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4. 打开宏定义NOTIFY_NOTIFY_EVENTGROUPS，关闭NOTIFY_SEMAPHORE和NOTIFY_MESSAGE。
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Task1: 任务运行1s后向任务2的事件标志组值bit0位写1，任务运行2s后向任务2的事件
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标志组值bit1位写1。计时清零，并重复这两个步骤。
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Task2: 任务2获取事件标志组值，获取成功后，打印该值。获取失败则进入等待状态。
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5. 打开宏定义NOTIFY_MESSAGE，关闭NOTIFY_SEMAPHORE和NOTIFY_NOTIFY_EVENTGROUPS。
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Task1: 任务运行1s后给任务2的通知值赋值10，任务运行2s后向任务2的通知值赋值20。
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计时清零，并重复这两个步骤。
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Task2: 任务2获取任务通知存放的值，获取成功后，打印该值。获取失败则进入等待状
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态。
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Example execution steps:
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1. Compile and download the program to the MCU and run it;
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2. You can use the log information printed by the serial debugging assistant to
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observe the task execution process.
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3. Open the define NOTIFY SEMAPHORE, close the NOTIFY NOTIFY EVENTGROUPS and
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NOTIFY MESSAGE.
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Task1: The task notification releases a semaphore to task 2 every 1s. Add 1
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to the total number of semaphores.
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Task2: Task 2 obtains the semaphore every 2s, obtains the semaphore
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successfully, and prints the semaphore value. Subtract 1 from the
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total semaphore.
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4. Open the define NOTIFY_NOTIFY_EVENTGROUPS, close the NOTIFY_SEMAPHORE and
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NOTIFY MESSAGE.
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Task1: The event flag group value bit0 is written to 1 after the task is
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run for 1s, and the event flag group value bit1 is written to 1 after
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the task is run for 2s.Time the reset and repeat the two steps.
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Task2: Task 2 Obtain the event flag group value and print the value. If
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the acquisition fails, the system enters the waiting state.
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5. Open the define NOTIFY MESSAGE, close the NOTIFY_SEMAPHORE and
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NOTIFY_NOTIFY_EVENTGROUPS.
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Task1: A value of 10 is assigned to the notification value of task 2 after
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the task runs for 1s, and a value of 20 is assigned to the
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notification value of task 2 after the task runs for 2sTime the
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reset and repeat the two steps.
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Task2: Task 2 Obtain the value saved in the task notification and print
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the value. If the acquisition fails, the system enters the waiting
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state.
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================================================================================
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注意事项：
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STK板与USB转TTL模块的连线方式如下：
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STK板 USB转TTL模块
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PA02(TX) --> RX
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PA03(RX) --> TX
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GND --> GND
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波特率: 115200bps
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Notes:
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The STK board is wired to the USB to TTL module as follows:
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STK board USB to TTL module
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PA02(TX) --> RX
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PA03(RX) --> TX
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GND --> GND
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Baud rate: 115200bps
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================================================================================
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