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                                样例使用说明
                             Sample Description
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功能描述：
此样例演示了LPTIM连续模式事件唤醒STOP模式。

Function descriptions:
This example demonstrates the LPTIM continuous mode event wake-up STOP mode.
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测试环境：
测试用板：PY32T090_STK
MDK版本： 5.28
IAR版本： 9.20
GCC版本：GNU Arm Embedded Toolchain 10.3-2021.10

Test environment:
Test board: PY32T090_STK
MDK Version: 5.28
IAR Version: 9.20
GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10
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使用步骤：
1. 编译并下载程序到MCU，并运行。
2. 按下按键进入STOP模式。
3. 199毫秒后唤醒STOP模式并循环进入STOP模式再唤醒。
4. LED等每隔199毫秒翻转一次；

Example execution steps:
1. Compile and download the program to the MCU and run it.
2. Press the button to enter STOP mode.
3. After 199 milliseconds, wake up from STOP mode and repeat the process of 
   entering STOP mode and waking up.
4. LEDs flip every 199 milliseconds.
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注意事项：
通过USB转TTL模块连接PC与STK板,STK板与USB转TTL模块的连线方式如下；
@PrintfConfigStart
STK板        USB转TTL模块
PB9(TX)   -->  RX
PB8(RX)   -->  TX
GND       -->  GND
UART配置为波特率115200，数据位8，停止位1，校验位None
@PrintfConfigEnd

Notes:
Connect the PC to the STK board through the USB to TTL module, and the connection
method between the STK board and the USB to TTL module is as follows:
@PrintfConfigStart
STK board USB to TTL module
PB9(TX)   -->  RX
PB8(RX)   -->  TX
GND       -->  GND
UART is configured as BaudRate 115200, data bit 8, stop bit 1, and parity None.
@PrintfConfigEnd
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