1、功能说明
    1、该例程介绍如何配置和使用ADC转换差分模式下的外部模拟输入即VinN和VinP上的外部电压差
    
2、使用环境
        IDE工具:  KEIL MDK-ARM V5.34.0.0
                  IAR EWARM 8.50.1
    硬件环境：      
        基于全功能板N32H497ZGL7_EVB V1.0开发

3、使用说明
    系统配置；
        1、时钟源： HSI+PLL
        2、系统时钟频率：240MHz
        3、端口配置：
            PA1选择为模拟功能
            PA2选择为模拟功能
            
        4、ADC：
            ADC1独立工作模式、软件触发转换、12位数据右对齐，转换PA1 PA2的模拟电压数据

    使用方法：
        1、编译后打开调试模式，将变量ADCTempValue添加到watch窗口观察;
        2、用户可将ADC_CH1引脚(PA1、PA2)接入外置电源，进行变压操作，电压范围在-3V3到3V3之间;
        3、通过改变PA1，PA2引脚的电压，可以看到转换结果变量 "VINP_VINN_Value" 同步改变
4、注意事项
    当系统采用HSE时钟时（一般HSI也是打开的），RCC_ConfigAdc1mClk(RCC_ADC1MCLK_SRC_HSE, RCC_ADC1MCLK_DIV8)可以配置为HSE或者HSI
    当系统采用HSI时钟时（一般HSE是关闭的），RCC_ConfigAdc1mClk(RCC_ADC1MCLK_SRC_HSI, RCC_ADC1MCLK_DIV8)只能配置为HSI

1. Function description
    1. This example describes how to configure and use the ADC to convert an external analog input in Differential Mode, 
       difference between external voltage on VinN and VinP.

2. Use environment
    Software development environment: 
        IDE TOOLS:  KEIL MDK-ARM V5.34.0.0
                    IAR EWARM 8.50.1
    Hardware development environment:
        Developed based on the full-function board N32H497ZGL7_EVB V1.0

3. Instructions for use
   System Configuration:
        1. Clock source: HSI+PLL
        2. System Clock frequency:  240MHz
        3. Port configuration:
            PA1 is selected as the analog function
            PA2 is selected as the analog function
        4. ADC:
            ADC1 independent working mode, software-triggered conversion, 12-bit data is right-aligned, and analog voltage data of PA1 PA2 is converted
            
    Instructions:
        1. Open the debug mode after compiling, add the variables ADCTempValue to the watch window for observation
        2. User can connect ADC_CHANNEL_1 pins (PA1, PA2) to external power supply  and vary voltage
            between -3V3 to 3V3.
        3. By changing the voltage of the PA1,PA2 pin, you can see that the conversion result variable "VINP_VINN_Value" changes synchronously.

4. Attention
    When the system uses HSE clock (generally HSI is also turned on), RCC_ConfigAdc1mClk (RCC_ADC1MCLK_SRC_HSE, RCC_ADC1MCLK_DIV8) can be configured as HSE or HSI
    When the system uses HSI clock (generally HSE is turned off), RCC_ConfigAdc1mClk (RCC_ADC1MCLK_SRC_HSI, RCC_ADC1MCLK_DIV8) can only be configured as HSI