实践出真知之三-从跑马灯开始（顺便搞定一个电话键盘） (amobbs.com 阿莫电子技术论坛) -

fool_boy 发表于 2009-11-23 12:22:37

实践出真知之三----从跑马灯开始（顺便搞定一个电话键盘）

标题说明：
“窃取”的傻孩子《深入浅出AVR单片机》第三章的标题

帖子摘要：
1.从零开始学AVR                   （说明：希望能对AVR还没入门的朋友有所帮助）
2.学完第三章的一个电话键盘小实验
3.实验总结

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/*
FileName: 28KeyTest
Date: 2009/11/22
Time: 17:30-22:00
*/
#include<iom48v.h>
#include"led_dis.h"
#include"key.h"
#include"delay.h"

void Init(void)
{
DDRB = 0XF0;
DDRC = 0XFF;
DDRD = 0XFF;
PORTB = 0B11111110;
PORTC = 0B11011111;
PORTD = 0XFF;
}

void main(void)
{
unsigned char KeyValue=0;

Init();

while(1)
{
   KeyValue = Key_Scan();
   Led_Display(KeyValue);
}
}

/****************************delay.h***********************/
#ifndef _DELAY_H_
#define _DELAY_H_

extern void Delay_ms(unsigned char Time);

#endif
/****************************delay.c***********************/
#include<macros.h>
#include"delay.h"

void Delay_ms(unsigned char Time)
{
unsigned char n;
while(Time>0)
{
   for (n=1; n<187; n++)
   {
         NOP();
   }
   Time--;
}

/****************************key.h***********************/
#ifndef _KEY_H_
#define _KEY_H_

#define Key_0 0x00
#define Key_1 0x01
#define Key_2 0x02
#define Key_3 0x03
#define Key_4 0x04
#define Key_5 0x05
#define Key_6 0x06
#define Key_7 0x07
#define Key_8 0x08
#define Key_9 0x09
#define Key_Time 10
#define Key_Uptri 11
#define Key_Downtri12
#define Key_Alarm 13
#define Key_Set    14
#define Key_Mup    15
#define Key_Mdown 16
#define Key_Nongli 17
#define Key_Star 18
#define Key_Sharp 19
#define Key_TP    20
#define Key_X    21
#define Key_Down 22
#define Key_Up    23
#define Key_AC    24
#define Key_CE    25
#define Key_Music 26
#define Key_Redial 27
#define NoKey    29

#define Key_X_1PORTC |= 0B00011111; \
            PORTC &= 0B11101111; \
            PORTB |= 0B11110000

#define Key_X_2PORTC |= 0B00011111; \
            PORTC &= 0B11110111; \
            PORTB |= 0B11110000

#define Key_X_3PORTC |= 0B00011111; \
            PORTC &= 0B11111011; \
            PORTB |= 0B11110000

#define Key_X_4PORTC |= 0B00011111; \
            PORTC &= 0B11111101; \
            PORTB |= 0B11110000

#define Key_X_5PORTC |= 0B00011111; \
            PORTC &= 0B11111110; \
            PORTB |= 0B11110000

#define Key_X_6PORTC |= 0B00011111; \
            PORTB |= 0B11111111; \
            PORTB &= 0B11011111

#define Key_X_7PORTC |= 0B00011111; \
            PORTB |= 0B11111111; \
            PORTB &= 0B11101111

#define Key_Scan_Port PINB
#define Key_Y_1 ((Key_Scan_Port|0B11110111)==0B11110111)
#define Key_Y_2 ((Key_Scan_Port|0B11111011)==0B11111011)
#define Key_Y_3 ((Key_Scan_Port|0B11111101)==0B11111101)
#define Key_Y_4 ((Key_Scan_Port|0B11111110)==0B11111110)

extern unsigned char Key_Scan(void);

#endif
}

/****************************key.c***********************/
#include<iom48v.h>
#include<macros.h>
#include"key.h"
#include"delay.h"

unsigned char Key_Scan(void)
{
/****扫描第一行****/
Key_X_1;
NOP();
if (Key_Y_1)
   return Key_Time;
else if(Key_Y_2)
   return Key_Uptri;
else if(Key_Y_3)
   return Key_Downtri;
else if(Key_Y_4)
   return Key_Alarm;

Key_X_2;
NOP();
if (Key_Y_1)
   return Key_Set;
else if(Key_Y_2)
   return Key_Mup;
else if(Key_Y_3)
   return Key_Mdown;
else if(Key_Y_4)
   return Key_Nongli;

Key_X_3;
NOP();
if (Key_Y_1)
   return Key_1;
else if(Key_Y_2)
   return Key_4;
else if(Key_Y_3)
   return Key_7;
else if(Key_Y_4)
   return Key_Star;

Key_X_4;
NOP();
if (Key_Y_1)
   return Key_2;
else if(Key_Y_2)
   return Key_5;
else if(Key_Y_3)
   return Key_8;
else if(Key_Y_4)
   return Key_0;

Key_X_5;
NOP();
if (Key_Y_1)
   return Key_3;
else if(Key_Y_2)
   return Key_6;
else if(Key_Y_3)
   return Key_9;
else if(Key_Y_4)
   return Key_Sharp;

Key_X_6;
NOP();
if (Key_Y_1)
   return Key_TP;
else if(Key_Y_2)
   return Key_X;
else if(Key_Y_3)
   return Key_Down;
else if(Key_Y_4)
   return Key_Up;

Key_X_7;
NOP();
if (Key_Y_1)
   return Key_AC;
else if(Key_Y_2)
   return Key_CE;
else if(Key_Y_3)
   return Key_Music;
else if(Key_Y_4)
   return Key_Redial;

return NoKey;
}

/****************************led_dis.h***********************/
#ifndef _LED_DIS_H_
#define _LED_DIS_H_

#include<iom48v.h>

#define Led_0 0
#define Led_1 1
#define Led_2 2
#define Led_3 3
#define Led_4 4
#define Led_5 5
#define Led_6 6
#define Led_7 7
#define Led_8 8
#define Led_9 9
#define Led_A 0X0A
#define Led_B 0X0B
#define Led_C 0X0C
#define Led_D 0X0D
#define Led_E 0X0E
#define Led_F 0X0F
#define Led_H 16
#define Led_L 17
#define Led_P 18
#define Led_r 19
#define Led_U 20
#define Led_T 21
#define Led_n 22
#define Led_S 5
#define Led_d 23
#define Led_X1 24
#define Led_X2 25
#define Led__26
#define Led_Pls1 27
#define Led_Pls2 28
#define Led___ 29
#define Led_NULL 30

#define Led1 PORTD |= 0B10000000
#define Led2 PORTC |= 0B00100000
#define Led1M PORTD &= 0B01111111
#define Led2M PORTC &= 0B11011111

#define LedDisPort PORTD

extern void Led_Display(unsigned char KeyValue);

#endif

/****************************led_dis.c***********************/
#include<iom48v.h>
#include"led_dis.h"
#include"delay.h"
#include"key.h"

const unsigned char DisTab[]=
{
0xC0,0xF9,0xA4,0xB0,0x99, //0,1,2,3,4
0x92,0x82,0xF8,0x80,0x90, //5,6,7,8,9
0x88,0x83,0xC6,0xA1,0x86, //A,b,C,d,E
0x8E,0x89,0xC7,0x8C,0xAF, //F,H,L,P,r
0xC1,0x87,0xC8,0xA1,0x93, //U,T,n,d,X1,
0x9A,0xBF,0xB9,0x8F,0xF7,0XFF //X2,-,Pls1,Pls2,NULL
};

void Led_Display(unsigned char KeyValue)
{
static unsigned char L1=Led___, L2=Led___; //验证一下static

switch(KeyValue)
{
   case NoKey:    break;
   case Key_1:    L1=Led_NULL; L2=Led_1; break;
   case Key_2:    L1=Led_NULL; L2=Led_2; break;
   case Key_3:    L1=Led_NULL; L2=Led_3; break;
   case Key_4:    L1=Led_NULL; L2=Led_4; break;
   case Key_5:    L1=Led_NULL; L2=Led_5; break;
   case Key_6:    L1=Led_NULL; L2=Led_6; break;
   case Key_7:    L1=Led_NULL; L2=Led_7; break;
   case Key_8:    L1=Led_NULL; L2=Led_8; break;
   case Key_9:    L1=Led_NULL; L2=Led_9; break;
   case Key_0:    L1=Led_NULL; L2=Led_0; break;
   case Key_Time: L1=Led_T; L2=Led_E; break;
   case Key_Uptri: L1=Led_U; L2=Led_P; break;
   case Key_Downtri:L1=Led_D; L2=Led_n; break;
   case Key_Alarm: L1=Led_A; L2=Led_L; break;
   case Key_Set:    L1=Led_S; L2=Led_E; break;
   case Key_Mup:    L1=Led_n; L2=Led_P; break;
   case Key_Mdown: L1=Led_n; L2=Led_d; break;
   case Key_Nongli: L1=Led_n; L2=Led_L; break;
   case Key_Star: L1=Led_S; L2=Led_r; break;
   case Key_Sharp: L1=Led_S; L2=Led_P; break;
   case Key_TP:    L1=Led_T; L2=Led_P; break;
   case Key_X:    L1=Led_X1; L2=Led_X2; break;
   case Key_Down: L1=Led__; L2=Led__; break;
   case Key_Up:    L1=Led_Pls1; L2=Led_Pls2; break;
   case Key_AC:    L1=Led_A; L2=Led_C; break;
   case Key_CE:    L1=Led_C; L2=Led_E; break;
   case Key_Music: L1=Led_U; L2=Led_C; break;
   case Key_Redial: L1=Led_r; L2=Led_L; break;
}

LedDisPort = DisTab;// | 0B10000000;
Led1;
Delay_ms(1);
Led1M;

LedDisPort = DisTab & 0B01111111;//while(1);
Led2;
Delay_ms(1);
Led2M;

}
****************************************************************
总结：
在读取引脚的电平之前一定要先延时一定时间，刚开始时我因为没延时导致按部分按键读取错误，浪费了整整一天的调试时间。

1181zjf 发表于 2009-11-23 12:53:07

进步不小。

flyerhacker 发表于 2009-11-23 14:05:22

笨小孩和傻孩子似乎很像啊。

Gorgon_Meducer 发表于 2009-11-23 14:06:07

关于这个延迟，有兴趣，请参考配套辅导教材：（从这里下载）http://www.ourdev.cn/bbs/bbs_content.jsp?bbs_sn=3239709&bbs_page_no=1&bbs_id=3039

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fool_boy 发表于 2009-11-23 15:23:23

谢谢：【3楼】 Gorgon Meducer 傻孩子

a1z26 发表于 2009-12-1 08:21:46

mark。

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实践出真知之三----从跑马灯开始 （顺便搞定一个电话键盘）

实践出真知之三----从跑马灯开始（顺便搞定一个电话键盘）