================================================================================
                                样例使用说明
                             Sample Description
================================================================================
功能描述：
此样例演示了EPWM 输入信号分频功能，数字比较(DC)子模块对输入信号进行分频处理后供
给 AQ 模块生成波形使用。

Function descriptions:
This sample demonstrates the input signal frequency division function of EPWM.
The Digital Comparator (DC) submodule performs frequency division on the input
signal, and the processed signal is then supplied to the AQ module for waveform
generation.

================================================================================
测试环境：
测试用板：PY32F420_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: PY32F420_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；
2. 从PA0输入信号，通过逻辑分析仪捕捉PC6引脚上的信号，PA0引脚上信号每输入4个上升沿，
PC6引脚上电平进行一次翻转；

Example execution steps:
1.Compile and download the program.
2.Apply an input signal to pin PA0, and use a logic analyzer to capture the
signal on pin PC6. For every 4 rising edges of the input signal on pin PA0, the
logic level on pin PC6 toggles once.

================================================================================
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
PA2(TX)  -->  RX
PA3(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
PA2(TX)  -->  RX
PA3(RX)  -->  TX
GND       -->  GND
UART is configured as BaudRate 115200, data bit 8, stop bit 1, and parity None.
@PrintfConfigEnd
================================================================================