================================================================================
                                样例使用说明
                             Sample Description
================================================================================
功能描述：
此样例演示RTC的时间戳功能。

Function descriptions:
This example demonstrates the timestamp function of RTC.
================================================================================
测试环境：
测试用板：PY32L090_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: PY32L090_STK
MDK Version: 5.28
IAR Version: 9.20
GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10
================================================================================
使用步骤：
1. 编译并下载程序到MCU。
2. 按下STK板的复位按键，通过RTC_TS引脚(PA8)产生上升沿时间戳事件，串口打印时间戳。

Example execution steps:
1. Compile and download the program to the MCU.
2. Press the reset button on the STK board, generate a rising edge timestamp 
event through the RTC_TS pin (PA8), and print the timestamp on the serial port.
================================================================================
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
================================================================================