Difference between revisions of "Lcd text"
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and here is source code: | and here is source code: | ||
| − | + | <enscript lang=c> | |
| − | |||
#define F_CPU 1000000UL | #define F_CPU 1000000UL | ||
#include <util/delay.h> | #include <util/delay.h> | ||
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} | } | ||
| + | </enscript> | ||
Revision as of 09:43, 1 April 2009
2 row lcd
Hello fellows, i've finally decided to write little bit on this wiki page. So, what i'll be writing about ? For last few days i was playing with little lcd display and i finally managed to write some text with it ;) The lcd has HD44780 hitachi chip.
Here is video how does it look like: http://www.youtube.com/watch?v=i1tZwHCo_g4
and here is source code:
<enscript lang=c>
#define F_CPU 1000000UL #include <util/delay.h> #include <avr/io.h>
void bf();
void in_d()
{
DDRD = 0x00;
} void out_d()
{
DDRD = 0xff;
}
void in_c()
{
DDRC = 0x00;
}
void out_c()
{
DDRC = 0xff;
}
write_i()
{
PORTC = 4;
PORTC = 0;
} read_bf()
{
// PORTC = 4;
PORTC = 6;
}
write_d()
{
PORTC = 5;
PORTC = 1;
}
read_d()
{
// PORTC = 4;
PORTC = 7;
}
clear()
{
PORTD = 1; // clear display write_i(); bf(); PORTD = 0b00000110; // entry mode write_d(); bf(); _delay_ms(100);
}
void init(void)
{
out_d(); out_c(); _delay_ms(15); PORTD = 0b00110000; // function set ( DL, N, F ) write_i();
_delay_ms(4.1);
PORTD = 0b00110000; // function set ( DL,N,F ) write_i();
_delay_us(100);
PORTD = 0b00110000; // function set ( DL,N,F ) write_i();
_delay_ms(4.1);
PORTD = 0b00111000; // set N and F write_i();
_delay_ms(4.1);
PORTD = 0b00001000; // display off write_i();
_delay_ms(4.1);
PORTD = 0b00001100; // display on write_i();
_delay_ms(4.1);
PORTD = 0b00000110; // entry mode write_i();
}
void bf()
{
unsigned int bf;
DDRB=0xff;
in_d();
read_bf();
bf = PORTD;
bf &= 0b10000000;
while(bf) {
read_bf();
bf = PORTD;
bf &= 0b10000000;
PORTB=0xff;
_delay_ms(100);
PORTB=0x0;
_delay_ms(50);
}
out_d();
}
void left()
{
PORTD = 0x18;
write_i();
bf();
}
int main()
{
unsigned int i;
init();
_delay_ms(11);
clear();
bf();
while(1) {
PORTD = 0x23; // #
write_d();
bf();
_delay_ms(500);
PORTD = 101; // e
write_d();
bf();
_delay_ms(500);
PORTD = 108; // l
write_d();
bf();
_delay_ms(500);
PORTD = 101; // e
write_d();
bf();
_delay_ms(500);
PORTD = 99; // c
write_d();
bf();
_delay_ms(500);
PORTD = 116; // t
write_d();
bf();
_delay_ms(500);
PORTD = 114; // r
write_d();
bf();
_delay_ms(500);
PORTD = 111; // o
write_d();
bf();
_delay_ms(500);
PORTD = 110; // n
write_d();
bf();
_delay_ms(500);
PORTD = 105; // i
write_d();
bf();
_delay_ms(500);
PORTD = 99; // c
write_d();
bf();
_delay_ms(500);
PORTD = 115; // s
write_d();
bf();
_delay_ms(500);
PORTD = 0x20; // " "
write_d();
bf();
_delay_ms(500);
PORTD = 0x28; // (
write_d();
bf();
_delay_ms(500);
PORTD = 97; // a
write_d();
bf();
_delay_ms(500);
PORTD = 116; // t
write_d();
bf();
_delay_ms(500);
left();
PORTD = 0x29; // )
write_d();
bf();
_delay_ms(500);
left();
PORTD = 0x20; // " "
write_d();
bf();
_delay_ms(500);
left();
PORTD = 0x49; // I
write_d();
bf();
_delay_ms(500);
left();
PORTD = 82; // R
write_d();
bf();
_delay_ms(500);
left();
PORTD = 67; // C
write_d();
bf();
_delay_ms(500);
left();
PORTD = 78; // N
write_d();
bf();
_delay_ms(500);
left();
PORTD = 101; // e
write_d();
bf();
_delay_ms(500);
left();
PORTD = 116; // t
write_d();
bf();
_delay_ms(500);
left();
PORTD = 0x20; // " "
write_d();
bf();
_delay_ms(500);
left();
PORTD = 114; // r
write_d();
bf();
_delay_ms(500);
left();
PORTD = 117; // u
write_d();
bf();
_delay_ms(500);
left();
PORTD = 108; // l
write_d();
bf();
_delay_ms(500);
left();
PORTD = 101; // e
write_d();
bf();
_delay_ms(1000);
clear();
_delay_ms(500);
}
return 0;
} </enscript>
