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                                样例使用说明
                             Sample Description
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功能描述：
此样例是对单色无源液晶显示器(LCD)的演示，将偏置产生电路配置为内部电阻分压，
使LCD全显，显示“88:88”字样。

Function descriptions:
This sample demonstrates the usage of a monochrome passive LCD (Liquid Crystal 
Display). The bias generation circuit is configured with internal resistor 
voltage division to achieve a fully displayed LCD showing the "88:88" characters.
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测试环境：
测试用板：PY32F092_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: PY32F092_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。
2. 连接STK板与LCD的引脚如下：
   STK板                LCD
   PA13(COM0)  --------> COM0
   PA14(COM1)  --------> COM1
   PA15(COM2)  --------> COM2
   PB0(COM3)   --------> COM3
   PB5(SEG0)   --------> SEG0
   PB6(SEG1)   --------> SEG1
   PB7(SEG2)   --------> SEG2
   PB8(SEG3)   --------> SEG3
   PB9(SEG4)   --------> SEG4
   PB10(SEG5)  --------> SEG5
   PB11(SEG6)  --------> SEG6
   PB12(SEG7)  --------> SEG7
3. 按下复位按键，LCD将全显，显示“88:88”字样。

Example execution steps:
1. Compile and download the program.
2. Connect the pins of the STK board and the LCD as follows:
   STK board           LCD
   PA13(COM0)  --------> COM0
   PA14(COM1)  --------> COM1
   PA15(COM2)  --------> COM2
   PB0(COM3)   --------> COM3
   PB5(SEG0)   --------> SEG0
   PB6(SEG1)   --------> SEG1
   PB7(SEG2)   --------> SEG2
   PB8(SEG3)   --------> SEG3
   PB9(SEG4)   --------> SEG4
   PB10(SEG5)  --------> SEG5
   PB11(SEG6)  --------> SEG6
   PB12(SEG7)  --------> SEG7
3. Press the reset button, and the LCD will display "88:88" in full.
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注意事项：
单色无源液晶显示器(LCD)的型号为：GDC04212。

Notes:
The model of the monochrome passive LCD is: GDC04212.
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