1、功能说明
    1、LPTIM 计数IN1 IN2正交编码的上升沿个数
2、使用环境
    软件开发环境：  KEIL MDK-ARM V5.30.0.0
    硬件环境：      基于N32L43XM-STB开发
3、使用说明
    系统配置；
        1、时钟源：
            HSE=8M,PLL=108M,AHB=108M,APB1=27M,APB2=54M,LPTIM CLK=LSI
        2、端口配置：
            PB5选择为LPIME IN1输入
            PB7选择为LPIME IN2输入
            PB0选择为IO输出
            PB1选择为IO输出
        3、LPTIM：
            LPTIM正交编码器模式，利用内部LSI时钟连续计数IN1 IN2上升沿个数
    使用方法：
        1、编译后打开调试模式，连接PB0和PB5，PB1和PB7，将变量encCNT添加到watch窗口
        2、程序运行后，PB0 PB1输出20个脉冲周期，encCNT等于40
4、注意事项
    无



1. Function description
     1. LPTIM counts the number of rising edges of IN1 IN2 quadrature encoding
2. Use environment
     Software development environment: KEIL MDK-ARM V5.30.0.0
     Hardware environment: Based on N32L43XM-STB development
3. Instructions for use
     System Configuration;
         1. Clock source:
             HSE=8M,PLL=108M,AHB=108M,APB1=27M,APB2=54M,LPTIM CLK=LSI
         2. Port configuration:
             PB5 is selected as LPIME IN1 input
             PB7 is selected as LPIME IN2 input
             PB0 is selected as IO output
             PB1 is selected as IO output
         3. LPTIM:
             LPTIM quadrature encoder mode, use the internal LSI clock to continuously count the number of rising edges of IN1 IN2
     Instructions:
         1. Open the debug mode after compiling, connect PB0 and PB5, PB1 and PB7, and add the variable encCNT to the watch window
         2. After the program runs, PB0 PB1 outputs 20 pulse cycles, and encCNT is equal to 40
4. Matters needing attention
     none