STM8_GPIO 上拉输入

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 实验平台: ST 官方三合一套件 
+ 硬件    : STM8S105S6T6C
+ 开发平台: IAR For STM8 1.10
+ 仿真器 : ST-Link
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

#include "stm8s.h"
/*******************************************************************************
*                         ==时钟初始化函数==
* CLK_DeInit();                                   --> 复位时钟寄存器
* CLK_HSICmd(ENABLE);                             --> 使能内部高速时钟
* CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV2); --> 配置内部高速时钟(时钟分频器:2分频)
* CLK_ClockSecuritySystemEnable();                --> 开启时钟安全系统
*******************************************************************************/
void CLK_INIT(void)                
{
CLK_DeInit();
CLK_HSICmd(ENABLE);
CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV2);
CLK_ClockSecuritySystemEnable();
}
/*******************************************************************************
*                         ==I/O口初始化函数==
* GPIO_DeInit();                                   --> 复位I/O端口 D
* GPIO_Init(GPIOD , GPIO_PIN_7 , GPIO_MODE_IN_FL_NO_IT);                      
                                                     --> 使能PORTD_7, 设置为 输入 ，上拉 ，不带中断
* GPIO_Init(GPIOD , GPIO_PIN_0 , GPIO_MODE_OUT_PP_LOW_SLOW);                      
                                                     --> 使能PORTD_0, 设置为 输出，推挽式 ，低电平 ，低速率
*******************************************************************************/
void GPIO_INIT(void)
{
GPIO_DeInit(GPIOD);
GPIO_Init(GPIOD , GPIO_PIN_7 , GPIO_MODE_IN_PU_NO_IT);          // KEY
GPIO_Init(GPIOD , GPIO_PIN_0 , GPIO_MODE_OUT_PP_LOW_SLOW);      // LED
}
/*******************************************************************************
*                           ==MAIN 函数==
* 初始化 时钟
* 初始化 端口
* 按下按键LED亮，松开按键则LED灭 
*******************************************************************************/
void main(void)
{
CLK_INIT();
GPIO_INIT();

   while(1)
   {
      if(GPIO_ReadInputPin(GPIOD,GPIO_PIN_7) == 0)
      {
        GPIO_WriteHigh(GPIOD,GPIO_PIN_0);
      }
      else
      {
        GPIO_WriteLow(GPIOD,GPIO_PIN_0);
      }
   }
}