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Finally I solved the problem.

cseusy, did you also use graphics lcd?

I use fast glcd

My problem was created because I was displaying text at the bottom right corner of the lcd and the y value ...

It is very big code to strip it down. It uses 18F4550 and a glcd 128*64

I use graphics.c and HDM64GS12.h math and string functions.

glcd_rect(x-1,y-1,x+29,y+7*size, YES, !color); ...

Compiler version PCH 4.084
PIC18F4550

In my application I see that certain variables change, when a specific code part is executed. The change is always on the same byte, same bit.
If I define a ...

Do you have any capacitors on the circuit? MAX232 produces some noise that needs filtering.

...

You're asking, how the integrator output can be cut back to near zero in equilibrum?. Typically, a small overshoot of the process value is required to achieve this.

Yes, I see this in my te ...

Hello I am trying to implement a PID controller to control temperature.

I have a question to make. The integral term is the sum of the past errors. ok but what happens when the error becomes small? ...

I don't see any settings on the datasheet specifically for the C version, but I noticed this:
All N.C. (no connect) pins must be connected
to ground.

I did not read thorougly the datasheet and th ...

Thank you both for the replies.

It was not a good idea to use the delay inside the interrupt, but I needed to see if the interrupt is working. I could use output_toggle instead. The real interrupt ...

Hello, I have a simple test program that flashes a message on an lcd, and a timer1 interrupt that flashes a led. The message on the lcd is ok but the interrupt time does not work ok. The delay's used ...

You can easily make your own USB to Serial converter out of a PIC. Drivers are standard and there is plenty of code available
Hey Mark, I'm interested in this could you point me to the right directio ...

Hello, I finally got a DS1340 and played with it the last few days, I post here the results.

The driver checks for the OSF (Oscillator Stop Flag) to check data validity so if you are reading all z ...

Has anyone used a DS1340 before? It is an i2c RTC from dallas-maxim.I would be grateful if you share some tested code.

I know it is almost the same as DS1307, and most if the code will be the same ...

Thank you all for your answers.
First I dont speak spanish. Greek is my native language.

The truth is that I solved the problem late last night (about 4:30 night) and I was too tired to post here. ...

I would like to ask you something about the 24LC1025 driver.
Have you modified the 24512 file? If yes, what modifications have you made? do you have access above address 65535?

That's the 16bit li ...

You may use HyperTerminal to view the recieved data. It is in the accessories-> communications menu on you computer. Make a new connection and direct it to the com port you have your device connect ...