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//==============================================================================
// Ten chuong trinh : Mach Ledmatrix Run Text
// Nguoi thuc hien : demon52
// Ngay thuc hien : 24/10/2012
// Phien ban : Demo
// Mo ta phan cung : Dung PIC16F877A - thach anh 20MHz
// : 74HC595
// : PortB dung dieu khien!
//------------------------------------------------------------------------------
// Notes:
// : dung che do Power On Reset
//==============================================================================
#include <16F877A.h>
#include <def_877a.h>
#device *=16 adc=10
#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT,NOLVP, NOCPD, NOWRT
#use delay(clock=20000000)
#include <string.h>
#include "font.c"
#define ic595_sclk1 PIN_B0
#define ic595_data1 PIN_B1
#define ic595_lclk1 PIN_B2
#define ic595_sclk2 PIN_B3
#define ic595_data2 PIN_B4
#define ic595_lclk2 PIN_B5
unsigned int8 next=0,lengh_STR;
unsigned char count=0;
unsigned char welcome[]=" http://codientu.org ";
unsigned char *str;
#int_timer0
void ngat_time0()
{
set_timer0(8);
count++;
if(count==25){
count=0;
next++;
if(next>=lengh_STR)next=0;
}
}
void Ic74595_Write(char data,char ic,char bits)
{
signed char count;
if(ic==1)
{
for(count=bits-1;count>=0;count--)
{
if((( data>>count) & 0x01) ==1)
output_high(ic595_data1);
else
output_low(ic595_data1);
output_high(ic595_sclk1);
output_low(ic595_sclk1);
}
output_high(ic595_lclk1);
output_low(ic595_lclk1);
}
if(ic==2)
{
for(count=bits-1;count>=0;count--)
{
if((( data>>count) & 0x01) ==1)
output_high(ic595_data2);
else
output_low(ic595_data2);
output_high(ic595_sclk2);
output_low(ic595_sclk2);
}
output_high(ic595_lclk2);
output_low(ic595_lclk2);
}
}
void Run_str_RtoL()
{
lengh_str=strlen(str)*6;
unsigned char j,temp_font;
Ic74595_Write(1,1,1);
for(j=next;j<32+next;j++){
Temp_font=font[str[(j%lengh_STR)/With_of_font] -32][j%With_of_font];
Ic74595_Write(temp_font,2,8);
delay_us(500);
Ic74595_Write(0,1,1);
}
}
void main (){
TRISB=0x00;
enable_interrupts(int_timer0);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_256);
enable_interrupts(global);
set_timer0(8);
str=welcome;
while(1){
Run_str_RtoL();
}
}
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