/**
  ******************************************************************************
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Copyright (C) 2022 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

<--------------------------------------------------------------------------------
Version history:
--------------------------------------------------------------------------------->
2025-07-01       V1.0.0      AE TEAM

<--------------------------------------------------------------------------------
Demo introduction:
--------------------------------------------------------------------------------->
本示例功能：对于小信号应用的零点偏移校准例程。先获取ADC的零点偏移，后续的ADC采样值会被零点偏移校准（软件处理）。

PC04(ADC通道14)：获取零点偏移时使用的ADC通道(普通IO输出低)。
16次ADC采样值的平均值作为零点offset校准值。获取了offset校准值后，该ADC通道和GPIO可以做其他用途。

PC05(ADC通道15)：正常使用的ADC通道。
注意：需要通过零点偏移校准。

<--------------------------------------------------------------------------------
测试环境:
--------------------------------------------------------------------------------->
测试用板；
ES-PDS-ES32F0283LT-V1.1

辅助工具：
ES-LINK II

辅助软件：
XCOM上位机软件

<--------------------------------------------------------------------------------
测试步骤：
--------------------------------------------------------------------------------->
1) 编译工程，编译通过后将程序下载到目标芯片；
2) 打开XCOM上位机软件，配置参数（波特率-115200，1位停止位，8位数据位，无奇偶校验），打开串口；
3) 复位芯片，或在线调试，运行程序；
4) 不停打印ADC转换值。（可通过板子上的滑动变阻器改变PC05(ADC通道15)上的输入电压）

<--------------------------------------------------------------------------------
注意：
--------------------------------------------------------------------------------->

<--------------------------------------------------------------------------------
System clock:
--------------------------------------------------------------------------------->
PLL  72M
