Need help! for microprocessor project.. 7x30 or 8x24 led dot matrix

hi everyone.. pls. we need your help in our project... 7x30 or 8x24 led dot matrix.. we need a schematic diagram.. a source code or assembly.... pls. thanks for the replies and help!!!:-D

---------- Post added at 20:09 ---------- Previous post was at 20:08 ----------

any type of display... btw it is a multi color led...
thanks a lot! we need your help please!

How much you gonna pay for that job? Also you have to be more specific to describe project.

haiz.... how much is your bet? we need this project... please!

I am not after money, a bit busy at moment. If you want to get freelancer here, you have to be even more specific:
1)deadlines
2)payment system
3)description of the project

the deadline of our project is on march 11.. we are the one to build that project and buy the materials needed... our project is to make a 7x30 RGB Led Dot Matrix using pic16f84a microprocessor... that there is a scrolling text " IF IT'S EASY, Then IT'S NOT ECE" we are begging anyone to pls. help us any ideas on our project... like the schematic diagram, the parts/components, and also the assembly program, what software are we going to use to burn that program... thanks! pls help us for our project!

i think its difficult to explain the full working, just if u found any problem while doing the project, then many one could help u....
i will just give an introduction if u r new to dotmatrix displays...
microcontroller is connected to row(7 rows),then connect a ring counter to 30 column (mod 30)
clock and reset of counter is controlled by microchip....

just read this sample c program i had done for our techfest (just day before yesterday)
then ask if u got any doubt....display which i made is 38x7 . just check the program and ask ur doubts...it will be better in ur case, i think so...



////////////////////////////////////////
//LED DOTMATRIX MESSAGE DISPLAY //
// vinodstanur@gmail.com //
////////////////////////////////////////
//used hightech c compiler(not free)////
////////////////////////////////////////
#include <htc.h>
#define _XTAL_FREQ 16e6 // 4MHz
__CONFIG(0x3F3A);

int a1,b1,c1,d1,e1,f1,g1,h1,i1,j1,k1,l1,m1,n1,o1,p1,q1,r1,s1,t1,u1,v1,w1,x1,y1,z1,z2,z3,z4,z5,z6,z7,z8,z9,z10,z11,z12,z13;


void begin()
{
(a1=0);(b1=0);(c1=0);(d1=0);(e1=0);(f1=0);(g1=0);(h1=0);(i1=0);(j1=0);
(k1=0);(l1=0);(m1=0);(n1=0);(o1=0);(p1=0);(q1=0);(r1=0);(s1=0);(t1=0);
(u1=0);(v1=0);(w1=0);(x1=0);(y1=0);(z1=0);(z2=0);(z3=0);(z4=0);(z5=0);
(z6=0);(z7=0);(z8=0);(z9=0);(z10=0);(z11=0);(z12=0);(z13=0);

}


void delay(unsigned int k){for(int i=0;i<=k;i++);}
void clock(){delay(50);PORTB=0;RD2=1;RD2=0;delay(10);}
void reset(){delay(50);PORTB=0;RD3=1;RD3=0;delay(10);}
void scroll(int a,b,c,d,e)
{
(a=~a);(b=~b);(c=~c);(d=~d);(e=~e);
int t;(t=0);


loop1a1=a);
for(int i=0;i<=10;i++)
{
PORTB=a1;clock();
PORTB=b1;clock();
PORTB=c1;clock();
PORTB=d1;clock();
PORTB=e1;clock();
PORTB=f1;clock();
PORTB=g1;clock();
PORTB=h1;clock();
PORTB=i1;clock();
PORTB=j1;clock();
PORTB=k1;clock();
PORTB=l1;clock();
PORTB=m1;clock();
PORTB=n1;clock();
PORTB=o1;clock();
PORTB=p1;clock();
PORTB=q1;clock();
PORTB=r1;clock();
PORTB=s1;clock();
PORTB=t1;clock();
PORTB=u1;clock();
PORTB=v1;clock();
PORTB=w1;clock();
PORTB=x1;clock();
PORTB=y1;clock();
PORTB=z1;clock();
PORTB=z2;clock();
PORTB=z3;clock();
PORTB=z4;clock();
PORTB=z5;clock();
PORTB=z6;clock();
PORTB=z7;clock();
PORTB=z8;clock();
PORTB=z9;clock();
PORTB=z10;clock();
PORTB=z11;clock();
PORTB=z12;clock();
PORTB=z13;reset();
}
(z13=z12);
(z12=z11);
(z11=z10);
(z10=z9);
(z9=z8);
(z8=z7);
(z7=z6);
(z6=z5);
(z5=z4);
(z4=z3);
(z3=z2);
(z2=z1);
(z1=y1);
(y1=x1);
(x1=w1);
(w1=v1);
(v1=u1);
(u1=t1);
(t1=s1);
(s1=r1);
(r1=q1);
(q1=p1);
(p1=o1);
(o1=n1);
(n1=m1);
(m1=l1);
(l1=k1);
(k1=j1);
(j1=i1);
(i1=h1);
(h1=g1);
(g1=f1);
(f1=e1);
(e1=d1);
(d1=c1);
(c1=b1);
(b1=a1);

(a=b);
(b=c);
(c=d);
(d=e);
(t=t+1);
if(t==5){(a=0);}
if(t==6){goto exit;}
goto loop1;
exit:;
}
//////FONT DATA BEGIN////////////////////////////////////////////////
void font(unsigned char c)///////////ASCII/////////////////////
{
if(c==97){scroll(0xF3, 0xAD, 0xAD, 0xAB, 0xC5);} //a
if(c==98){scroll(0x1, 0xED, 0xED, 0xED, 0xF3);}
if(c==99){scroll(0xC3, 0xBD, 0xBD, 0xBD, 0xDB);}
if(c==100){scroll(0xF3, 0xED, 0xED, 0xED, 0x1);}
if(c==101){scroll(0xC3, 0xAD, 0xAD, 0xAD, 0xCB);}
if(c==102){scroll(0xEF, 0xEF, 0x1, 0x6F, 0xAF);}
if(c==103){scroll(0xCF, 0xB5, 0xB5, 0xAD, 0xC3);}
if(c==104){scroll( 0x1, 0xEF, 0xDF, 0xDF, 0xE1);}
if(c==105){scroll(0xFF, 0xFF, 0xA1, 0xFF, 0xFF);}
if(c==106){scroll(0xFB, 0xFD, 0xFD, 0xA3, 0xFF);}
if(c==107){scroll(0x1, 0xF7, 0xE7, 0xDB, 0xFD);}
if(c==108){scroll(0xFF, 0xFF, 0x1, 0xFF, 0xFF);}
if(c==109){scroll(0xC1, 0xBF, 0xC1, 0xBF, 0xC1);}
if(c==110){scroll(0x81, 0xDF, 0xBF, 0xBF, 0xC1);}
if(c==111){scroll(0xC3, 0xBD, 0xBD, 0xBD, 0xC3);}
if(c==112){scroll(0x81, 0xD7, 0xB7, 0xB7, 0xCF);}
if(c==113){scroll(0xCF, 0xB7, 0xB7, 0xB7, 0xC1);}
if(c==114){scroll(0x81, 0xEF, 0xDF, 0xDF, 0xDF);}
if(c==115){scroll(0xDB, 0xAD, 0xAD, 0xAD, 0xB3);}
if(c==116){scroll(0xDF, 0xDF, 0x3, 0xDD, 0xDB);}
if(c==117){scroll(0x83, 0xFD, 0xFD, 0xFB, 0x81);}
if(c==118){scroll(0x87, 0xFB, 0xFD, 0xFB, 0x87);}
if(c==119){scroll(0x83, 0xFD, 0xF3, 0xFD, 0x83);}
if(c==120){scroll(0xB9, 0xD7, 0xEF, 0xD7, 0xB9);}
if(c==121){scroll(0x9B, 0xED, 0xED, 0xED, 0x83);}
if(c==122){scroll(0xDD, 0xD9, 0xD5, 0xCD, 0xDD);} //z
if(c==65){scroll(0xC1, 0xB7, 0x77, 0xB7, 0xC1);} //letter A
if(c==66){scroll(0x01, 0x6D, 0x6D, 0x6D, 0x93);}
if(c==67){scroll(0x83, 0x7D, 0x7D, 0x7D, 0xBB);}
if(c==68){scroll(0x01, 0x7D, 0x7D, 0xBB, 0xC7);}
if(c==69){scroll(0x01, 0x6D, 0x6D, 0x6D, 0x7D);}
if(c==70){scroll(0x01, 0x6F, 0x6F, 0x6F, 0x7F);}
if(c==71){scroll(0x83, 0x7D, 0x65, 0x6D, 0xA3);}
if(c==72){scroll(0x01, 0xEF, 0xEF, 0xEF, 0x01);}
if(c==73){scroll(0x7D, 0x7D, 0x1, 0x7D, 0x7D);}
if(c==74){scroll(0xF3, 0x7D, 0x7D, 0x03, 0x7F);}
if(c==75){scroll(0x01, 0xEF, 0xD7, 0xBB, 0x7D);}
if(c==76){scroll(0x01, 0xFD, 0xFD, 0xFD, 0xFD);}
if(c==77){scroll(0x01, 0xBF, 0xDF, 0xBF, 0x01);}
if(c==78){scroll(0x01, 0xBF, 0xDF, 0xEF, 0x01);}
if(c==79){scroll(0x83, 0x7D, 0x7D, 0x7D, 0x83);}
if(c==80){scroll(0x01, 0x6F, 0x6F, 0x6F, 0x9F);}
if(c==81){scroll(0x83, 0x7D, 0x75, 0x79, 0x81);}
if(c==82){scroll(0x01, 0x6F, 0x6F, 0x6F, 0x91);}
if(c==83){scroll(0x9B, 0x6D, 0x6D, 0x6D, 0xB3);}
if(c==84){scroll(0x7F, 0x7F, 0x01, 0x7F, 0x7F);}
if(c==85){scroll(0x03, 0xFD, 0xFD, 0xFD, 0x03);}
if(c==86){scroll(0x07, 0xFB, 0xFD, 0xFB, 0x07);}
if(c==87){scroll(0x01, 0xFB, 0xF7, 0xFB, 0x01);}
if(c==88){scroll(0x39, 0xD7, 0xEF, 0xD7, 0x39);}
if(c==89){scroll(0x3F, 0xDF, 0xE1, 0xDF, 0x3F);}
if(c==90){scroll(0x79, 0x75, 0x6D, 0x5D, 0x3D);} //letter Z
if(c==48){scroll(0x83, 0x7D, 0x7D, 0x7D, 0x83);} //NUM 0
if(c==49){scroll(0xDD, 0xBD, 0x1, 0xFD, 0xFD);}
if(c==50){scroll(0xBD, 0x79, 0x75, 0x6D, 0x9D);}
if(c==51){scroll(0x7B, 0x7D, 0x5D, 0x4D, 0x33);}
if(c==52){scroll(0xCF, 0xAF, 0x6F, 0xEF, 0x1);}
if(c==53){scroll(0xB, 0x5D, 0x5D, 0x5D, 0x63);}
if(c==54){scroll(0x83, 0x6D, 0x6D, 0x6D, 0xB3);}
if(c==55){scroll(0x79, 0x77, 0x6F, 0x5F, 0x3F);}
if(c==56){scroll(0x93, 0x6D, 0x6D, 0x6D, 0x93);}
if(c==57){scroll(0x9B, 0x6D, 0x6D, 0x6D, 0x83);} //NUM 9
if(c==32){scroll(0xFF, 0xFF, 0xFF, 0xFF, 0xFF);} //space
if(c==46){scroll(0xFF, 0xF9, 0xF9, 0xFF, 0xFF);} //.
if(c==58){scroll(0xFF, 0x99, 0x99, 0xFF, 0xFF);} //:
if(c==47){scroll(0xFB, 0xF7, 0xEF, 0xDF, 0xBF);} // /
if(c==92){scroll(0xBF, 0xDF, 0xEF, 0xF7, 0xFB);} // \
if(c==35){scroll(0xD7, 0x1, 0xD7, 0x1, 0xD7);} // #
if(c==40){scroll(0xC7, 0xBB, 0x7D, 0x7D, 0xFF);} // (
if(c==41){scroll(0xFF, 0x7D, 0x7D, 0xBB, 0xC7);} // )
if(c==95){scroll(0xFD, 0xFD, 0xFD, 0xFD, 0xFD);} // _
if(c==64){scroll(0x83, 0x6D, 0x55, 0x6D, 0x8B);} // @
if(c==38){scroll(0xC9, 0xB6, 0xCA, 0xFD, 0xFA);} // &
if(c==45){scroll(0xEF, 0xEF, 0xEF, 0xEF, 0xEF);} // -
if(c==36){scroll(0xDF, 0xAB, 0x1, 0xAB, 0xF7);} // $
if(c==43){scroll(0xEF, 0xEF, 0x83, 0xEF, 0xEF);} // +
if(c==37){scroll(0x3B, 0x37, 0xEF, 0xD9, 0xB9);} // %
if(c==94){scroll(0xEF, 0xDF, 0xBF, 0xDF, 0xEF);} //^
if(c==63){scroll(0xBF, 0x7F, 0x65, 0x5F, 0x9F);} // ?
if(c==59){scroll(0xFF, 0x92, 0x91, 0xFF, 0xFF);} // ;
if(c==61){scroll(0xEB, 0xEB, 0xEB, 0xEB, 0xEB);} // =
if(c==60){scroll(0xEF, 0xD7, 0xBB, 0x7D, 0xFF);} // <
if(c==62){scroll(0xFF, 0x7D, 0xBB, 0xD7, 0xEF);} // >
if(c==44){scroll(0xFF, 0xF5, 0xF3, 0xFF, 0xFF);} // ,
if(c==91){scroll(0xFF, 0x1, 0x7D, 0x7D, 0xFF);} // [
if(c==93){scroll(0xFF, 0x7D, 0x7D, 0x1, 0xFF);} // ]
if(c==126){scroll(0xEF, 0xDF, 0xEF, 0xF7, 0xEF);} // ~
if(c==33){scroll(0xFF, 0xFF, 0x5, 0xFF, 0xFF);} // !
if(c==42){scroll(0xAB, 0xC7, 0x1, 0xC7, 0xAB);} // *
//////FONT DATA END////////////////////////////////////////////////



}
int f;s
void typehere(const char *s)
{
while(*s)
font(*s++);
}

void main()
{
__delay_ms(100);
__delay_ms(200);
__delay_ms(100);
TRISB=0;
TRISD=0b01110011;
PORTD=0;
RD3=1;
RD3=0;
begin();
delay(10);
begin();

while(1)
{

typehere("-*-*-*-WELCOME TO GHATECH 2011-*-*the tech feast of Palghat-*-");

typehere(" GOVERNMENT ENGINEERING COLLEGE SREEKRISHNAPURAM, PALAKKAD ");

typehere(" ...testing display font..... abcdefghijklmnopqrstuvwxyz....ABCDEFGHIJKLMNOPQRSTUVWXYZ....0123456789....!@#$%^&*()_+-=;:?/>.<,~+\..... ..... ..... ..... .....");



}
}
:idea::idea::idea::idea:

---------- Post added at 14:17 ---------- Previous post was at 14:13 ----------

my 'c' knowledge is limited , so that will be very much reflected in the above program(never mind), i dont mean u should use the program, its just for getting some ideas....

do you have an assembly program for this... also the schematic diagram? can i use this c program for pic16f84 a microprocessor? thanks vinodstanur... its a big help....

Sorry i am not much familiar with asm ...i used to write program in C only....It will be too difficult to understand asm if u r new to microcontroller....better go for C.

U cannot use the same program for 84a. While compiling it shows
"Error [1250] C:\Users\laptop\Documents\c files\SCROLLING ADVANCED.C; 122. could not find space (2 bytes) for variable _v1

"

clock = RD2
RESET=RD3
row data = PORTB bits(7 rows)...use npn transistor in between pic o/p and led row(led negatives of a row are connected together(38 led negatives in each row in my case...
led column + is connected to ring counter from left to right (bit0,bit1,.....bit38) from left to right.....

i could not make a schematic now because now i am at college and little bit busy too....i will try to make it and upload it later ....
so just try to grab the idea how it works...then u can easily write programs according to ur logic....
bye...

thank you so much! vinodstanur...

It will be too difficult to understand asm if u r new to microcontroller....better go for C.

Click to expand...

EPIC FAIL
OMG, next to light on a bunch of LEDs you will need .NET and FRAMEWORK and please do not forget about copyrights ;-)

in above program, i used "int a,b,c,.....z13
but actually i need 8 bits only.....so its better to use "short int a,b,c,....z3.....

---------- Post added at 19:34 ---------- Previous post was at 19:31 ----------

Takeshi-san said:

EPIC FAIL
OMG, next to light on a bunch of LEDs you will need .NET and FRAMEWORK and please do not forget about copyrights ;-)

Click to expand...

????????????

IMO, if you are new to MPU, asm is much much better, because it will help to understand, how MPU working.
PIC16F84 is classic one for ASM
2jabern

IF IT'S EASY, Then IT'S NOT ECE

Click to expand...

31 characters, if you will use 5*7 bitmap font, you will need to scroll 31*5 bytes of data(and don't forget spacing between symbols). just make a "brute code" without fontset. Or, if you want to play with font - one hint - I,F,T,',S,E,A,Y,h,e,n,N,O,C - this is your font. Oh, sorry, i forgot ","

yes to make spacing between letters i used

(t=t+1);
if(t==5){(a=0);}
if(t==6){goto exit;}
goto loop1;
exit:;

it creates a space in between letters in the display...

---------- Post added at 17:33 ---------- Previous post was at 17:21 ----------

And if it is to diaplay only "IF IT'S EASY, Then IT'S NOT ECE" then no need to create the full ascii font table...just use only the caps letters u requires...
Actually i used the full font set just because i want to display everything typed in my pc ...RS232 interfacing to PIC16F877A.

---------- Post added at 18:32 ---------- Previous post was at 17:33 ----------

here is the diagram which i had drawn in paint.

vinod.. please help! can you give me the c program of our project that display... USLS ENEC5C: "IF IT'S EASY, Then IT'S NOT ECE".. pls pls... and what component 470E is? what is the specific pins of pic16f877A on that schematic diagram.... thanks a lot!

470E means 470 ohms. Dont use transparent LEDs. Buy only that red coloured or yellow coloured transluscent LED. That transparent LED will make much trouble to you...its reverse breakdown voltage is very low...this means when you connect it in dot matrix display then it requires diodes in series with each column... And also, you should look straight to that led then only you could see its glowing..but it is not so good to your eyes...so better use that red or yellow coloured led.
......
i used port b (8 bit) for data and RD2 and RD3 (port d bits 2 and 3) pins as clock and reset .......
Friend atleast try to make it...And you can ask if any doubt in program..Now i am at college..And i am replying you through my mobile only..I think you are making multicoloured LED , IS IT? but my program is only for single coloured led... Just read the program and if you cant understand then just ask ...if you are using only 30 column then just edit the program ...just delete the extra variables. For my display its 38 led column. So i used variables upto z13.
What are you doing? Student?

yes im a student... an ECE student.. but we are not focus on Programming that's why i don't have any idea about programming... thanks!

am also a student.....more over its my hobby....

+1 for semi-transparent LED's

Vinod, your code looks woefully inefficient using entirely too much memory resources of the PIC.

You might want to try and optimize the code by thinking "how can I do this with 5 lines of code instead of 50"

2 jumper2high, man, you made my day *LOL*