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| /\* Main.c file generated by New Project wizard
\*
\* Created: 2023-5-22
\* Processor: 80C52
\* Compiler: SDCC for 8051
\*/
#include <mcs51reg.h>
//#include <compiler.h> //NOP()
//#include <8052.h>
//#include <stc89.h>
#include <stdio.h>
#define FOSC 11059200UL //System frequency
#define BAUD 9600 //UART baudrate
#define T1MS (65536-FOSC/12/1000) //1ms timer
#define COL1 (0xEF)
#define COL2 (0xDF)
#define COL3 (0xBF)
#define COL4 (0x7F)
#define wei1 (P2\_0)
#define wei2 (P2\_1)
#define LED (P2\_2)
unsigned char key_val[] = {
COL1, COL2, COL3, COL4
};
unsigned char __code key_data[] = {
0xEE, 0xED, 0xEB, 0xE7, // Key 1, 2, 3, 4
0xDE, 0xDD, 0xDB, 0xD7, // Key 5, 6, 7, 8
0xBE, 0xBD, 0xBB, 0xB7, // Key 9, 10, 11, 12
0x7E, 0x7D, 0x7B, 0x77, // Key 13, 14, 15, 16
};
unsigned char __code table[] = {//
0x3f,0x06,0x5b,0x4f,// 0 1 2 3
0x66,0x6d,0x7d,0x07,// 4 5 6 7
0x7f,0x6f // 8 9
};
unsigned char key_row = 0;
unsigned char key_col = 0;
unsigned char Button_value = 0;
//unsigned int count = 0;
void delayms(unsigned int ms)
{
unsigned int x;
unsigned int y;
for (y=ms; y>0; y--)
{
for (x=227; x>0; x--)
;
}
}
void uart\_init()
{
SCON |= 0x50;
TMOD |= 0x20;
// TH1 = 0xFD;//波特率9600
// TL1 = 0xFD;
TH1 = (unsigned char)(((65536 - (FOSC/32/BAUD) )>>8) - 2) ;
TL1 = (unsigned char)(65536- (FOSC/32/BAUD) - 2) ;
TR1 = 1;
}
void SendData(char data1)
{
SBUF = data1;
while (!TI) ;
TI = 0;
}
void SendString(unsigned char \*buffer)
{
unsigned char \*p = buffer;
while (\*p)
{
SendData(\*p);
p++;
}
}
int putchar(int data1)
{
SendData(data1);
return data1;
}
void int0\_init()
{
IT0 = 1; // 下降沿触发
EX0 = 1; // 开外部中断0
EA = 1; //open global interrupt switch
}
void key\_scan()
{
unsigned char i = 0;
for (i=0; i<4; i++)
{
key_col = key_val[i];
P1 = key_col;
delayms(2);
}
}
void key\_value(unsigned char value)
{
unsigned char i = 0;
for (i=0; i<16; i++)
{
if (value == key_data[i])
{
Button_value = i + 1;
printf("Keyvalue:%d \r\n",Button_value);
}
}
}
/\*------------------------------------------------
外部中断（INT0）中断子程序
------------------------------------------------\*/
void int0\_isr(void) __interrupt 0 __using 1
{
EX0 = 0;
delayms(10); // 延时去抖
key_row = P1;
key\_value(key_row);
EX0 = 1;
}
void led\_off()
{
wei1= 1;
wei2= 1;
}
void Display()
{
TR0 = 0; //timer0 STOP
wei1=0,wei2=1;
P0= table[Button_value/10];
delayms(6);
// NOP();NOP();NOP();NOP();
led\_off();
delayms(1); //消隐
NOP();NOP();
wei1=1,wei2=0;
P0= table[Button_value%10];
// NOP();NOP();NOP();NOP();
delayms(6);
// NOP();NOP();
led\_off();
delayms(1); //消隐
TR0 = 1; //timer0 start running
}
/\*------------------------------------------------
定时器初始化子程序
------------------------------------------------\*/
void Init\_Timer0(void)
{
TMOD |= 0x01; //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响
TL0 = T1MS; //initial timer0 low byte
TH0 = T1MS >> 8; //initial timer0 high byte
TR0 = 1; //timer0 start running
ET0 = 1; //enable timer0 interrupt
EA = 1; //open global interrupt switch
}
/\*------------------------------------------------
定时器0中断子程序
------------------------------------------------\*/
void Timer0\_isr(void) __interrupt 1 __using 2
{
TL0 = T1MS; //reload timer0 low byte
TH0 = T1MS >> 8; //reload timer0 high byte
Display();
LED = ! LED; //指示灯反相，可以看到闪烁
}
void main(void)
{
Init\_Timer0();
int0\_init();
uart\_init();
while (1)
{
// 键盘扫描
key\_scan();
}
}
|
