1、功能说明
    1、TIM4 CH2上升沿触发CH1输出一个单脉冲
2、使用环境
    软件开发环境：  KEIL MDK-ARM 5.34.0.0
    硬件环境：      基于N32A455VEL7_EVB v1.0.0开发
3、使用说明
    系统配置；
        1、时钟源：
                    HSE=8M,PLL=144M,AHB=144M,APB1=36M,APB2=72M,TIM4 CLK=72M
        2、端口配置：
                    PB6选择为TIM4的CH1输出
                    PB7选择为TIM4的CH2输入
                    PA3选择为IO输出
        3、TIM：
                    TIM4 配置CH2上升沿触发CH1输出一个单脉冲
    使用方法：
        1、编译后打开调试模式，PA3连接PB7，用示波器或者逻辑分析仪观察TIM4 的CH1 的波形
        2、通过调试窗口配置gSendTrigEn=1，程序发送PA3的上升沿，TIM4 CH1输出一个单脉冲
4、注意事项
    无



1. Function description
     1. The rising edge of TIM4 CH2 triggers CH1 to output a single pulse
2. Use environment
     Software development environment: KEIL MDK-ARM 5.34.0.0
     Hardware Environment: Developed based on N32A455VEL7_EVB v1.0.0
3. Instructions for use
     System Configuration;
         1. Clock source:
                     HSE=8M,PLL=144M,AHB=144M,APB1=36M,APB2=72M,TIM4 CLK=72M
         2. Port configuration:
                     PB6 is selected as CH1 output of TIM4
                     PB7 is selected as the CH2 input of TIM4
                     PA3 is selected as IO output
         3. TIM:
                     TIM4 configures CH2 rising edge to trigger CH1 to output a single pulse
     Instructions:
         1. After compiling, open the debug mode, connect PA3 to PB7, and use an oscilloscope or logic analyzer to observe the waveform of CH1 of TIM4
         2. Configure gSendTrigEn=1 in the debug window,the program sends the rising edge of PA3, TIM4 CH1 outputs a single pulse
4. Matters needing attention
     none