RC522 với 8051 qua UART

[quangminh]

Minh giao tiếp RC522 với 8051 qua UART
mô phỏng thì ok còn thực tế thì ko như ý muốn
mong ae giúp đỡ.
#include <REGX51.H>
unsigned char x;
#define LCD_D4 P0_4
#define LCD_D5 P0_5
#define LCD_D6 P0_6
#define LCD_D7 P0_7
#define LINE_1 0x80
#define LINE_2 0xC0
#define CLEAR_LCD 0x01
#define LCD_RS P2_0
#define LCD_RW P2_1
#define LCD_E P2_2
unsigned char card_id[12];
unsigned char current_byte = 0;
//unsigned int a[12];
//-----------------------------------------------
void delay_ms(unsigned int Time)
{
unsigned int i,j,t;
t=Time;
for(i=0;i<t;i++)
{
for(j=0;j<125;j++);
}
}
void delay_us(unsigned int Time)
{
unsigned int i,j;
for(i=0;i<Time;i++)
{
for(j=0;j<2;j++);
}
}
void delay(unsigned int count) //if count = 1000 --> delay 1s (milisecond)
{
int i,j;
for(i=0;i<count;i++)
for(j=0;j<1275;j++);
}
//-------------------------------------------------------------------------------------------
void lcd1602_enable(void)
{
LCD_E=1;
delay_us(3);
LCD_E=0;
delay_us(5);
}
// ---------------------------------
// Ham Gui 4 Bit Du Lieu Ra LCD
void lcd1602_send_4bit_data ( unsigned char cX )
{
LCD_D4 = cX & 0x01;
LCD_D5 = (cX>>1)&1;
LCD_D6 = (cX>>2)&1;
LCD_D7 = (cX>>3)&1;
}
// ------------------------
// Ham Gui 1 Lenh Cho LCD
void lcd1602_send_command (unsigned char cX )
{
lcd1602_send_4bit_data ( cX >>4 ); // send 4 bit high
lcd1602_enable() ;
lcd1602_send_4bit_data ( cX ); // send 4 bit low
lcd1602_enable() ;
}
// -------------------------
// Ham Khoi Tao LCD
void lcd1602_init ( void )
{
lcd1602_send_4bit_data ( 0x00 );
delay_ms(200);
LCD_RS=0;
LCD_RW=0;
LCD_E=0; // che do gui lenh
lcd1602_send_4bit_data ( 0x03 ); // ket noi 8 bit
lcd1602_enable() ;
lcd1602_enable () ;
lcd1602_enable () ;
lcd1602_send_4bit_data ( 0x02 ); // ket noi 4 bit
lcd1602_enable() ;
lcd1602_send_command( 0x2C ); // giao thuc 4 bit, hien thi 2 hang, ki tu 5x8
lcd1602_send_command( 0x80);
lcd1602_send_command( 0x0C); // cho phep hien thi man hinh
lcd1602_send_command( 0x06 ); // tang ID, khong dich khung hinh
lcd1602_send_command( CLEAR_LCD ); // xoa toan bo khung hinh
}
// --------------------------------------------------
// Ham Thiet Lap Vi Tri Con Tro
void lcd1602_gotoxy(unsigned char x, unsigned char y)
{
unsigned char address;
if(!y)
address = (LINE_1+x);
else
address = (LINE_2+x);
delay_ms(3);
lcd1602_send_command(address);
delay_ms(1);
}
// --------------------------------------------------
// Ham Xoa Man Hinh LCD
void lcd1602_clear(void)
{
lcd1602_send_command( CLEAR_LCD );
//delay_us(300);
}
// --------------------------------------------------
// Ham Gui 1 Ky Tu Len LCD
void lcd1602_putchar ( unsigned int cX )
{
LCD_RS=1;
lcd1602_send_command( cX );
LCD_RS=0;
}
// --------------------------------------------------
// Ham Gui 1 Chuoi Ky Tu Len LCD
void lcd1602_puts(char *s)
{
while (*s)
{
lcd1602_putchar(*s);
s++;
}
}
//----------------------------------------------------------------------------------------------------
void recieve() interrupt 4 // ngat truyen thông
{
card_id[current_byte]=SBUF;
RI=0; // reset co RI
current_byte++;
}
void main()
{
P2_7 = 0;
TMOD=0x20; //Enable Timer 1
TH1=0XFD;
SCON=0x50;
TR1=1;
EA=1;
ES=1;
P1 = 0;
lcd1602_init();
lcd1602_clear();
lcd1602_gotoxy(0,0);
lcd1602_puts("Card ID:");
lcd1602_gotoxy(0,1);
while(1)
{
if(current_byte==12)
{
P2_7=1;
lcd1602_gotoxy(0,1);
for(x=0;x<12;x++)
{
lcd1602_putchar(card_id[x]);
P1 = card_id[x];
delay_ms(500);
}
break;
}
}
}
https://www.youtube.com/watch?v=Tb3YgvCbBxA