基于STM32的 矩阵键盘 驱动(中断方式)

case Keyboard_EXTI_Row2:
GPIO_ResetBits(Keyboard_Control_Port ,Keyboard_Line) ;
for(i=0 ;i<5 ;i++)//扫描方式判断按键
{
GPIO_SetBits(Keyboard_Control_Port ,(Keyboard_LineBase<<i)) ;
#endif /*中断扫描模式宏定义*/
/*键盘全局变量声明*/
extern unsigned int Keyboard_Val ; //当前键值
extern unsigned char Keyboard_Change_Flag ; //键值改变标志，读取新的键值后由主程序清零
/*键盘接口函数声明*/
//============================Keyboard.c=============================//
#include "stm32f10x_lib.h"
#include "Keyboard.h"
unsigned int Keyboard_Val = 0 ; //保存键值
GPIO_Init(Keyboard_Control_Port ,&GPIO_InitStructure) ;
EXTI_ClearITPendingBit(Keyboard_EXTI_Row1) ; //清除中断标志位
GPIO_EXTILineConfig(Keyboard_EXTI_PortSource ,Keyboard_EXTI_PinSource1 ); //Pinsource不能取或
/*可以自己定义其它扫描方式*/
#define DELAY_COUNT 0x0FFFF
/*键盘控制引脚定义*/
#define Keyboard_Control_Port GPIOD
#define Keyboard_Line_1 GPIO_Pin_0
#define Keyboard_Line_2 GPIO_Pin_1
{
unsigned long tmpFlag=0 ; //保存需要的中断标志位
unsigned char i = 0 ; //循环标量
tmpFlag = EXTI->PR & Keyboard_EXTI_Line ; //只取设定过的标志位
EXTI->PR = tmpFlag ;
switch(tmpFlag) //判断是哪个标志位置位
EXTI_InitStructure.EXTI_LineCmd = ENABLE ;
EXTI_Init(&EXTI_InitStructure) ;
}
/****************************************************************
函数名称: Delay
{
case Keyboard_EXTI_Row1:
GPIO_ResetBits(Keyboard_Control_Port ,Keyboard_Line) ;
for(i=0 ;i<5 ;i++) //扫描方式判断按键
{
GPIO_SetBits(Keyboard_Control_Port ,(Keyboard_LineBase<<i)) ;
功能:在扫描按键时，用于延时消抖
参数: nCount --延时长度
返回值:无
*****************************************************************/
void Delay(vu32 nCount)
{
for(; nCount!= 0;nCount--);
#define Keyboard_IRQ_Channel EXTI9_5_IRQChannel
#define Keyboard_EXTI_Line (Keyboard_EXTI_Row1 | Keyboard_EXTI_Row2 | Keyboard_EXTI_Row3 | Keyboard_EXTI_Row4)
#define Keyboard_EXTI_Row2 EXTI_Line6
#define Keyboard_EXTI_Row3 EXTI_Line7
#define Keyboard_EXTI_Row4 EXTI_Line8
#define Keyboard_EXTI_PortSource GPIO_PortSourceGPIOD
}
//==============================================================//
//=========================stm32f10x_it.c============================//
void EXTI9_5_IRQHandler(void)
EXTI_ClearITPendingBit(Keyboard_EXTI_Row2) ; //清除中断标志位
GPIO_EXTILineConfig(Keyboard_EXTI_PortSource ,Keyboard_EXTI_PinSource2 );
EXTI_ClearITPendingBit(Keyboard_EXTI_Row3) ; //清除中断标志位
#define Keyboard_EXTI_PinSource1 GPIO_PinSource5
#define Keyboard_EXTI_PinSource2 GPIO_PinSource6
#define Keyboard_EXTI_PinSource3 GPIO_PinSource7
#define Keyboard_EXTI_PinSource4 GPIO_PinSource8
------------------------------------------------*/
#ifndef __KEYBOARD_H
#define __KEYBOARD_H
#include "stm32f10x_lib.h"
//选择扫描模式
#define Interrupt_Scan //中断扫描模式,要在NVIC在中打开对应中断
功能:键盘初始化为中断扫描模式
初始化键盘需要的IO，Line1-Line5设为输出低
Row1-Row4接上拉电阻，使能下降沿中断
参数:无
返回值:无
*****************************************************************/
void Init_Keyboard_Interrupt(void)
GPIO_SetBits(Keyboard_Control_Port ,Keyboard_Line) ;
//Row1-Row4设置为下拉输入，用来接收上升沿中断
GPIO_InitStructure.GPIO_Pin = Keyboard_Row;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD ; //下拉输入
#define Keyboard_Row_3 GPIO_Pin_7
#define Keyboard_Row_4 GPIO_Pin_8
#define Keyboard_LineBase Keyboard_Line_1
#define Keyboard_RowBase Keyboard_Row_1
#define Keyboard_Line (Keyboard_Line_1 | Keyboard_Line_2 | Keyboard_Line_3 | Keyboard_Line_4 | Keyboard_Line_5)
//设置Row1-Row4为上升沿中断
EXTI_InitStructure.EXTI_Line = Keyboard_EXTI_Line;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt ;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising ;
GPIO_InitStructure.GPIO_MoFra Baidu biblioteke = GPIO_Mode_Out_PP ; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz ;
GPIO_Init(Keyboard_Control_Port ,&GPIO_InitStructure) ;
{
GPIO_InitTypeDef GPIO_InitStructure ;
EXTI_InitTypeDef EXTI_InitStructure ;
EXTI_DeInit() ;
//Line1-Line5设为输出高
GPIO_InitStructure.GPIO_Pin = Keyboard_Line ;
{
Keyboard_Val = 1+i ;
Keyboard_Change_Flag = 1 ;
break ;
}
}
}
GPIO_SetBits(Keyboard_Control_Port ,Keyboard_Line) ;
EXTI->PR = Keyboard_EXTI_Row1 ; //清除中断标志
break ;
#ifdef Interrupt_Scan
extern void Init_Keyboard_Interrupt(void) ;//键盘初始化为键盘扫描模式
#endif
extern void Delay(vu32 nCount) ; //用于延时消抖
#endif /* KEYBOARD_H */
//=================================================================//
#define Keyboard_Line_3 GPIO_Pin_2
#define Keyboard_Line_4 GPIO_Pin_3
#define Keyboard_Line_5 GPIO_Pin_4
#define Keyboard_Row_1 GPIO_Pin_5
#define Keyboard_Row_2 GPIO_Pin_6
#define Keyboard_Row (Keyboard_Row_1 | Keyboard_Row_2 | Keyboard_Row_3 | Keyboard_Row_4)
#ifdef Interrupt_Scan /*中断扫描模式宏定义*/
#define Keyboard_EXTI_Row1 EXTI_Line5
GPIO_EXTILineConfig(Keyboard_EXTI_PortSource ,Keyboard_EXTI_PinSource3 );
EXTI_ClearITPendingBit(Keyboard_EXTI_Row4) ; //清除中断标志位
GPIO_EXTILineConfig(Keyboard_EXTI_PortSource ,Keyboard_EXTI_PinSource4 );
if(GPIO_ReadInputDataBit(Keyboard_Control_Port ,Keyboard_Row_1))
{
Delay(DELAY_COUNT) ; //延时消抖
if(GPIO_ReadInputDataBit(Keyboard_Control_Port ,Keyboard_Row_1))
unsigned char Keyboard_Change_Flag = 0 ; //键值改变标志，读取键值后清零
/****************************************************************
函数名称: Init_Keyboard_Interrupt
if(GPIO_ReadInputDataBit(Keyboard_Control_Port ,Keyboard_Row_2))
//==========================Keyboard.h===============================//
/*----------------------------------------------
本程序实现4*5键盘的扫描
从左到右，从上到下，键值
依次为1-20