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

<--------------------------------------------------------------------------------
Version history:
--------------------------------------------------------------------------------->
2021-12-21	V1.0.0	AE TEAM
2022-06-24	V1.0.1	AE TEAM
2022-12-29	V1.0.2	AE TEAM
2023-10-18	V1.0.3	AE TEAM
<--------------------------------------------------------------------------------
Demo introduction:
--------------------------------------------------------------------------------->
8 keys TK spring example
——Nixie tube display when touched

TKlib Vision 1.0
——Pure key handling library

<--------------------------------------------------------------------------------
System clock:
--------------------------------------------------------------------------------->
Internal HRC[24MHz] divided by 6, then PLL to 48MHz.

<--------------------------------------------------------------------------------
Pin connection: 
--------------------------------------------------------------------------------->
TK ---- (PA2, TK)
TK ---- (PA3, TK)
TK ---- (PA5, TK)
TK ---- (PA6, TK)
TK ---- (PA7, TK)
TK ---- (PB0, TK)
TK ---- (PA11, TK)
TK ---- (PA12, TK)
LED_COM ---- (PA8, GPIO_FUNC_0)
LED_COM ---- (PA9, GPIO_FUNC_0)
LED_COM ---- (PA10, GPIO_FUNC_0)
LED_COM ---- (PB9, GPIO_FUNC_0)
LED_SEG ---- (PB1, GPIO_FUNC_0)
LED_SEG ---- (PB2, GPIO_FUNC_0)
LED_SEG ---- (PB10, GPIO_FUNC_0)
LED_SEG ---- (PB11, GPIO_FUNC_0)
LED_SEG ---- (PB12, GPIO_FUNC_0)
LED_SEG ---- (PB13, GPIO_FUNC_0)
LED_SEG ---- (PB14, GPIO_FUNC_0)
LED_SEG ---- (PB15, GPIO_FUNC_0)