/**
  ******************************************************************************
  * 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) 2021 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

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Version history:
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2021-3-16	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：该程序的目的是用户A生成自己的公钥和私钥，并根据输入的用户B的公钥生成共享密钥，其步骤为：
step 1  ECC椭圆曲线初始化；
step 2  A生成私钥和公钥；
step 3  获取公钥和私钥；
step 4  获取B的公钥；
step 5  验证B的公钥；
step 6  A的私钥与B的公钥点乘，得到共享密钥；
step 7  获取共享密钥。
debug程序，观察私钥数组privekey和公钥数组sharekey。

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测试环境:
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测试用板；
ES-DEV-ES32W3120

辅助工具：

辅助软件：

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测试步骤：
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1) 编译工程，编译通过后将程序下载到目标芯片；
2) 在线调试，运行程序；

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注意：
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1) 测试板与ESBridge需共GND。

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System clock:
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48MHz.

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Pin connection: 
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