1、功能说明
     1、TIM3 TIM4在TIM1周期下计数
2、使用环境
    软件开发环境：KEIL MDK-ARM V5.34.0.0
    硬件开发环境： 
        N32G05x系列：
            基于评估板N32G05xRBQ7_STB V1.0开发
        N32G05x系列：
            基于评估板N32G05xRBL7_STB V1.0开发
3、使用说明
    系统配置:
        1、时钟源：
                    HSI=8M,SYS CLK=64M,TIM1 CLK=64M,TIM3 CLK=64M,TIM4 CLK=64M
        2、端口配置：
                    PA8选择为TIM3的CH1输出
                    PB6选择为TIM4的CH1输出
                    PA9选择为TIM1的CH1输出
        3、TIM：
                    TIM1 CH1 周期触发TIM3 TIM4的门控
    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、程序运行后，TIM3 15倍周期TIM1，TIM4 10倍周期TIM1
4、注意事项
       开发板默认PA9,PA10跳帽接到NSLINK的虚拟串口，若工程中PA9，PA10不作串口，用作其他用途，须拔掉串口跳帽。
	
	
	
1. Function description
     1. TIM3 TIM4 counts under the TIM1 cycle
2. Use environment
	Software development environment: KEIL MDK-ARM V5.34.0.0
    Hardware development environment:
         N32G05x series:
            Developed based on the evaluation board N32G05xRBQ7_STB V1.0
         N32G05x series:
            Developed based on the evaluation board N32G05xRBL7_STB V1.0
3. Instructions for use
    System Configuration;
        1. Clock source:
                    HSI=8M,SYS CLK=64M,TIM1 CLK=64M,TIM3 CLK=64M,TIM4 CLK=64M
         2. Port configuration:
                     PA8 is selected as the CH1 output of TIM3
                     PB6 is selected as the CH1 output of TIM4
                     PA9 is selected as the CH1 output of TIM1
         3. TIM:
                     TIM1 CH1 period triggers the gating of TIM3 TIM4
     Instructions:
         1. After compiling, turn on the debug mode, use an oscilloscope or logic analyzer to observe the waveforms of TIM1 CH1, TIM3 CH1, and TIM4 CH1
         2. After the program runs, TIM3 15 times cycle TIM1, TIM4 10 times cycle TIM1
4. Matters needing attention
        By default, the PA9 and PA10 jumper caps of the development board are connected to the virtual serial port of NSLINK. If PA9 and PA10 are not used as serial ports in the project, and are used for other purposes, the serial port jumper caps must be unplugged.
	