#define TEST 2
#include<reg51.h>
//#include"delay.h"
#if TEST==1 //using bit banging method to write
#include"74hc595.h"
#endif
#if TEST==2 //using UARTMode_0 for write
#include"uartmode_0.h"
#include"utility.h"
#endif
//#include"lcd8.h"
////////////////lcd8/////////
#define lcd_data P0
sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;
void write_lcd(unsigned char c)
{
#if TEST==1
write_74hc595(c);
#endif;
#if TEST==2
rev_bits2(c);
uart_tx(x);
#endif
RW=0;
EN=1;
EN=0;
//delay_ms(2);
}
void cmd_lcd(unsigned char cmd)
{
RS=0;
write_lcd(cmd);
}
void disp_lcd(unsigned char c)
{
RS=1;
write_lcd(c);
}
void init_lcd(void)
{
cmd_lcd(0x01);
cmd_lcd(0x02);
cmd_lcd(0x06);
cmd_lcd(0x0e);
cmd_lcd(0x38);
cmd_lcd(0x80);
}
void str_lcd(char *s)
{
while(*s)
disp_lcd(*s++);
}
void int_lcd(unsigned int n)
{
char a[5]={0},i=0;
if(n==0)
{
disp_lcd('0');
return;
}
else
{
while(n>0)
{
a[i++]=((n%10)+48);
n=n/10;
}
for(--i;i>=0;i--)
{
disp_lcd(a[i]);
}
}
}
void float_lcd(float f)
{
int i;
unsigned char j;
i=f;
int_lcd(i);
disp_lcd('.');
for(j=0;j<3;j++)
{
f=(f-i)*10;
i=f;
int_lcd(i);
}
}
///////////////////////bit banging and uart mode0 method to write//////////
main()
{
#if TEST==2
init_uart();
#endif
init_lcd();
disp_lcd('B');
cmd_lcd(0xc0);
str_lcd("serial lcd");
while(1);
}
74hc595.h
#ifndef _74hc595_h_
#define _74hc595_h_
sbit ds=p3^0; //connect to serial input pin of 74hc595
sbit clk=p3^1; //connect to clock input
sbit _mr=p3^2; //connect to reset input
#define rst_74hc595_mr=0;_mr=1; //to reset a device
//routine to convert 8bit parellel to 1bit serial msb first
void write_74hc595(unsigned char dat)
{
unsigned char i;
for(i=0;i<=7;i++)
{
clk=0;
ds=(dat&(0x80>>1))?1:0;
clk=1;
`}
//extra clock for moving from shift register to storage register
clk=0;
clk=1;
//rst_74hc595 //reset shift register(optional)
}
#endif
delay.h
#ifndef _delay_h_
#define _delay_h_
void delay_ms(unsigned int dly)
{
unsigned int i;
for(;dly>0;dly--)
{
for(i=122;i>0;i--);
}
}
main()
{
delay_ms(1);
while(1);
}
#endif
