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Hello, I try to write internal eeprom(18f452) as big than 255, but I can't. It means when I try to write eeprom 1020 adc value; I can not. Everytime pic eeprom is saved 255...what is wrong? (I defined ...

What is the overall purpose of your project ? Tell us what external
devices are controlled by the PIC.

Overall purpose is that I used pc program what I do. My program sends
string via comport ...

thanks your suggestion I tried what you said.
but can you please explain your last sentence with more details. So I can understand it my language is not good enough to understand your sentence.

Bu ...

I think I have to write my code completly to what I want for my problem understanding correctly..

#include <18f452.H>

#device adc=10

#fuses XT, NOWDT, BROWNOUT, PUT, NOLVP
#use dela ...

You are right, if(b==1) make something also if(b==2) ,if(b==3) ,if(b==4)
makes something. You are right, I changed as if(buf[0]==1), if(buf[0]==2) , if(buf[0]==3) and also if(buf[0]==4) but result ...

Hi,
You have not shown it but a is proberbly defined as int :-
int a;

a = getch();

a is NOT a string so atoi will not work properly on it.
here is an example of what you need to do:-

For 1 ...

thanks your help, I try what you say and I searched,

but
if (kbhit())

a=getch();

b=atoi(a);
////////////////////////////////////////////////
if (a &g ...

Yes you are right, but pc program just send string as 100, 120 , 130 bla bla ...so pic convert string as integer and It has to use as a integer value.
Is it possible to create any code...?

When I change as your suggestion no result again.

Thanks for your reply. Problem solved. How can I send three-digit numbers for example 120,132 number? When I try if (a=='100')
compiler give me an error like this....

Character constant constructe ...

my problem is when I send data from pc to pic as like code

if (kbhit())

a=getch();

////////////////////////////////////////////////
if (a=='9')
{ ...

Hello,
my first problem is that
I want to send integer data from pc to pic, I searched and analyzed many codes.
Generally data is sent from pc to pic as character; a,b,c,d,1,2,hello and
general ...

yes you are right, I solved my problem via as I put resistor apps 1k. transistor between fet. Because fet needs little current.

thanks everybody, I solved my problem. Circuit control is very important. This is necessary. If you don't control circuit carefully, It takes too much your time. my problem was on the circuit.

best ...

All of the connections are ok. And also in proteus and real circuit dont work correctly. Why?