Please post your doubts regarding "Lets Learn AVR - step by step tutorial" here..
we will discuss it..

Hi ajay, How are you? i hope you are fine.

Ok ajay, i have a problem with the software. i already download all software that u give in the 1st step. but when i try to install my computer will be stuck. i try to install it to other computer, but it still same.. and 1 thing, can u give the full schematic for avr? becoz the schematic that u give only for interface. so if u dont mind i want the full schematic for avr becoz i want to compare it with my schematic.

Thanks
rgds
BoB

what do you mean by full schematic?
also... I have installed the software in my PC i don't feel any problem.. can you try a different version of AVR studio.. that might help..

i mean schematic diagram for avr.

ok ajay, now i can install the program. Thanks. the problem is the file that i download was corrupted. thats why i cannot install the program. hehe

ok..
for AVR its very simple..
everything is labeled.. MISO will go to MISO of AVR
MOSI with MOSI of AVR
SCK with SCK of AVR
RESET with RESET of AVR
LED with simple.. LED on the target board.. or u can leave open if you don't want to connect
Led is connected like this.. on the target board..
LED ---|<|-----/\/\/\/\------VCC

For more information on pin configuration look in the datasheet of your AVR.

ok. Thanks ajay for ur information.

Ajay~i want to ask about the step3 tutorial.
LD Rn,X+/Y+/Z+ , this instruction.i'm curious about the Z+. izzit this code is for the next pointer?so if i only want to load in only 1 data from 1 address then izzit Z is enough?

yeah.. slashes in the instruction means you can either use x, y or z.
i.e.
LD Rn X+
or
LD Rn Y+
or
LD Rn Z+
That command load the register Rn with the value stored at location Z and then increment Z.
if you just want to load from location Z and do not want it to increment then you can use the following command
LD Rn, Z
this will load register Rn with value stored at location Z.

Hi Ajay,

I'm begginer in AVRstudio and winAVR. I wrote lcd .h and .c file, but when I use .h in other project, building final files fails:

../test.c:7: undefined reference to `LCD_init'
../test.c:11: undefined reference to `LCD_cursorxy'
../test.c:12: undefined reference to `LCD_sendstring'
make: *** [test.elf] Error 1
Build failed with 3 errors and 1 warnings...

lcd.c was checked before and works fine. I don't know where my mistake is.

Can you help me???

regards Robbby

files need to be in the same directory as your project.
is the lcd.c and lcd.h lies in same folder as test.c?

Hello,
I have al the projects files in the same directory, but nothing.

Robbby

Robby can you please make a new thread? because this is for tutorial doubts. Please make a new thread in AVR discussion forum.. and explain problem again.. thank you..

Question from AVR keypad tutorial. I wanna join keypad and lcd in my project with your lcd and keypad drivers from tutorial. The problem is how to display pushed key on LCD display. I study your project and found statements like this:

while(!(key = getkey()));
key = translate (key);
lcddata(key);

I understand all this statemnt, but not working in my project. LCD display different characters. Can you tell me, what I'm doing wrong.

regards

Robbby

what are you doing in the translate function?
is it same as mine?
what kind of characters are being displayed?

My mistake in return statements:
return KEYval + '0'; // I forgot ' ' around 0, so the result was wrong characters
.
.
.
ej ej my desultory typing

Robbby

hope everything is fine now

i am having ATMEGA32 . i want to interface to DS1307 with ATMEGA32. What is the bit rate value for DS1307, Note the maximum Freq of DS1307 is 100KHZ. what are all the routines can i follow for the DS1307.

AVR has got inbuilt I2C ports.. you can directly use them..

Yes. ATMEGA32 having inbuilt I2C ports but it cannot works for me ..i think the bit rate is not correct.what is the bit rate for DS1307.

In I2C Bit rate is not specific. The clock is controlled by master so it can be anything depending on speed of master controller. However maximum speed is always specified in data sheets. For DS1307 its 400kbps i think but still check its data sheet once and configure your controller accordingly.

Ajay please edit UART tutorial ( c program)
UBRRL shoud be equall to 0x19 for baud rate 9600:-|
u wrote by mistake 0x17;
void serial_init(){
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x19;
}

ok!! my mistake.. but how i made that mistake

edit:
mistake rectified..

hi guys. i am trying to start prjcts with my atmega162.
i started with the step by step tutorial, but the links isn't working
has any 1 similar problem..

link not working? can you post the link here?

hi ajay i want to use SPI. i have some doubts. please give me simple example how to do that in ATMEGA32.

will give code examples only with tutorial. So please wait till i write for SPI (not SPm i think). I will try to write it soon.

if you have written your own code then you can open up a new thread and ask your doubt i will help u out.

any tutorial for codevision.......

code vision is not free.. i am putting stress on free compilers, so everyone can afford to learn.

Hi Ajay I am using I2C but i cannt get the exact clock speed. Crystal Osc=8Mhz and I2C bus Speed 100Khz, what is the Bitrate value?