1、功能说明
    1、TIM1 CH2门控CH1和TIM3 TIM4
2、使用环境
    软件开发环境：  KEIL MDK-ARM V5.26.2.0
    硬件环境：      基于N32G032R8L7_STB开发
3、使用说明
    系统配置；
        1、时钟源：
                    HSE=8M,PLL=48M,AHB=48M,APB1=48M,APB2=48M,TIM1 CLK=48M,TIM3 CLK=48M,TIM4 CLK=48M
        2、端口配置：
                    PA8选择为TIM1 CH1输出
                    PA3选择为TIM1 CH2输入
                    PA6选择为TIM3 CH1输出
                    PA4选择为TIM4 CH1输出
        3、TIM：
                    TIM1 CH2 门控TIM1 CH1，门控TIM3,TIM4
    使用方法：
        1、编译后打开调试模式，用示波器或者逻辑分析仪观察TIM1 CH1,TIM3 CH1,TIM4 CH1的波形
        2、TIM1 CH2高电平定时器开始计数，低电平停止
4、注意事项
    无

1. Function description
     1. TIM1 CH2 gated CH1 and TIM3
2. Use environment
    Software development environment: KEIL MDK-ARM V5.34.0.0
    Hardware environment: Developed based on the evaluation board N32G031C8L7-STB V1.0
3. Instructions for Use
    System configuration：
        1. Clock source:
                     HSE=8M, PLL=48M, AHB=48M, APB1=48M, APB2=48M, TIM1 CLK=48M, TIM3 CLK=48M
        2. Port configuration:
                     PA8 is selected as TIM1 CH1 output
                     PA3 is selected as TIM1 CH2 input
                     PA6 is selected as TIM3 CH1 output
		     PA4 is selected as TIM4 CH1 output
        3. TIM:
            TIM1 CH2 Gated TIM1 CH1, Gated TIM3,Gated TIM4
     Instructions:
    1. Open debugging mode after compilation and observe TIM1 CH1, TIM3 CH1,TIM4 CH1 waveforms with an oscilloscope or logic analyzer
         2. TIM1 CH2 high level timer starts counting, low level stops
4. Matters needing attention
    None