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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ADC采集通过TIM触发的方式打印通道4的电压值，PA4为模拟输入，每隔1s会从
串口打印当前的电压值。

Function descriptions:
This sample demonstrates ADC data acquisition by triggering with TIM and 
printing the voltage value of channel 4. PA4 is an analog input, and the 
current voltage value willbe printed via the serial port every 1s.
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测试环境：
测试用板：PY32M020_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: PY32M020_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. 编译下载程序到MCU，并运行；
2. 串口每隔1s会打印一次PA4的电压值。

Example execution steps:
1.Compile and download the program to the MCU and run it.
2.The serial port will print the voltage value of PA4 every 1s.
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注意事项：
STK板        USB转TTL模块
PA02(TX) --> RX
PA03(RX) --> TX
GND      --> GND

波特率:115200

Notes:
STK Board USB to TTL Module
PA02(TX) --> RX
PA03(RX) --> TX
GND --> GND

Baud rate: 115200
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