STM32 按键输入

#include "stm32f10x.h"
#include "key.h"

//按键初始化函数
void KEY_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}

#ifndef __KEY_H
#define __KEY_H     

#define KEY0  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12)//读取按键0
#define KEY1  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_13)//读取按键1
#define KEY2  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14)//读取按键2
#define KEY3  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)//读取按键3

#define KEY4  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_4)//读取按键0
#define KEY5  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_5)//读取按键1
#define KEY6  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_6)//读取按键2
#define KEY7  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_7)//读取按键3
#define KEY8  GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_8)//读取按键3

void KEY_Init(void);//IO初始化

#endif

#include "stm32f10x.h"
#include <stdio.h>
#include "sys.h"
#include "delay.h"
#include "oled.h"
#include "24l01.h"
#include "key.h"

/* OLED
SCL-D0--PC15
SDA-D1--PC14
RST---PC13
DC---PB4*/

/*
        2401--SPI1
        MISO-PA6 SCK-PA5     CE-PB3
        IRQ-PA3  MOSI-PA7 CSN-PA2
*/

// c8t6

 u8 tmp_buf[1] ;

int main(void)
{
    Stm32_Clock_Init(9);//系统时钟设置为外部晶振，9倍频
    delay_init(72);//系统SysTick初始化
    JTAG_Set(JTAG_SWD_DISABLE);     //=====关闭JTAG接口
    JTAG_Set(SWD_ENABLE);           //=====打开SWD接口 可以利用主板的SWD接口调试
  OLED_Init();
    KEY_Init();
    //NRF24L01_Init();                //=====NRF24L01无线模块初始化
 // NRF24L01_FindMyself();          //=====NRF24L01无线模块检查 检测不到就停在这边自检闪灯
     //tmp_buf[0]= 1 ;
    while (1)
    { 

              // TX_Mode(); 

                 //     OLED_ShowNumber(0,30,tmp_buf[0],5,12);
               //    NRF24L01_TxPacket(tmp_buf);    

     if(KEY0 == 0)
         {
             delay_ms(10);
             OLED_ShowString(0,20,"Key0");

         }
         if(KEY1 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key1");
         }
         if(KEY2 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key2");
         }
         if(KEY3 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key3");
         }     

          if(KEY4 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key4");
         }     

          if(KEY5 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key5");
         }     

       if(KEY6 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key6");
         }     

          if(KEY7 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key7");
         }     

          if(KEY8 == 0)
         {
              delay_ms(10);
              OLED_ShowString(0,20,"Key8");
         }     

         OLED_Refresh_Gram();
  }

    }