introduction new member

Welcome to the element14 community!  There are plenty of great projects other cool write ups that you can use to help you learn more about the ATmega 328p.  Check out all of the Arduino Projects under "Challenges & Projects/Arduino".

hello thanks for your answer,

but I wanna work without arduino, just with atmega328p, I dont wann use libray for now, for best understand the code, and leran a lithe more,

thanks

hello thanks for your answer,

but I wanna work without arduino, just with atmega328p, I dont wann use libray for now, for best understand the code, and leran a lithe more,

thanks

I completely understand that, as I too prefer working outside of the Arduino environment.  I prefer the ATmega328PB, as I appreciate the extra serial port, but I have also used the atmega328p and the atmega168p chips in some projects.  In the search box at the top of the screen enter 'atmega328p' and you will find a bunch of projects using these chips.

If there is an area that you are looking to learn more about, try and ask some specific questions and I sure that there are members here who would glad to point you to some useful posts or offer some advice.

I wIll see the project on the forum of course. I'm very knew on this, embedded systems , I have already started, and I can put some sub-routine from st7066 work fine. but it's on begin.
now i'm try generat my own "character" in CGRAM,
but first if you can tell me one thing aabout the "function set" from datasheet of ST7066 I will apreaciate your time and kindness.
on pag 13 the bit are: DB5=1;DB4=DL;DB3=N;DB2=F;DB1=x;DB0=x;
on pag 20 on fluxogram for "softreset/init ..." in 4 bit mode interface
in a few lines before "Initialization end" the function set code for send the bit in 2 times, the sequence is not the same on the table from pag 13. the N and F bit are in position DB1 and DB0.
can you understand my question? I'm sorry my inglish I'm Portuguese :D

datsheet:

www.google.com/url

A while ago Atmel produced a short training series on the AVR based around the Atmel Xplained Mini ATmega328P dev board.

Getting Started with AVR
https://www.youtube.com/watch?v=UMi6lg563BA&list=PLtQdQmNK_0DRhBWYZ32BEILOykXLpJ8tP

May be of some interest ?

I already due some class, begin C, mplabx user,advance c/c++, etc... :D thanks for the tip.

Looking through the specification, I do see the the same thing (the N and F bits are repositioned).  A lot of the specifications that I have used often do have errors, especially in the examples.  I would send the N and F bits in DB3 and DB2 as shown on page 13.

Keep in mind that while using the 4-bit mode, the data is sent using the DB7 through DB4 (not DB3  to DB0).

yes I, only use DB7->DB4,  have have tryed the two ways, but nothing happen. I think it's not a mistake, maybe is for work in 4bit mode.

first I send the high niblble

second the low nibble in the corectly posiiton, .

if you look at the entry mode set,  or display clear they not have change the bit position,

in 4bit mode the config DB on function set are ok, I should be use the way of pag 20. but anyway I cant put it work, beacause I cant change the fonte size from 5*8 dot to 5*11 dot, I need read more information about this, I dont know yeat if the 5*11 its only for caracter genarator ou the pattern caracter from DDRAM.

thanks so much for your help

the N I can put it work nice, N=1 for 1line and N=1 for 2 line,

the DL is always 0, I think it's work good beacuse I can display caracther on displa.

but when tyr change de F to 0 or 1  nothing hapen :D

I can not imagine that the format of the commands should ever change depending on the 4/8bit mode.  Sometimes it is helpful to look at the specification of other chips that are listed as compatible.  Here is a link to a compatible chip that might help you figure out the issues.

https://www.sparkfun.com/datasheets/LCD/HD44780.pdf

Good luck.

I ported this driver to other controllers and a linux device. I also did it without Arduino. But I used their code as a starting point.

In your case, the Arduino driver is already targeted to your controller. Taking the Arduino code and removing the Arduino specifics should be a doable exercise.

You have a library that's known to work with the display. And you remove the flavour that you don't want in your code.