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Doubts in AVR tutorial

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Ajay

Sat Aug 18 2007, 05:25AM

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

[ Edited Mon Sep 03 2007, 01:02AM ]

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4y133

Sun Sep 02 2007, 06:08PM

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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

Ajay

Mon Sep 03 2007, 01:01AM

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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..

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huuthang

4y133

Mon Sep 03 2007, 02:53AM

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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

Ajay

Mon Sep 03 2007, 03:35AM

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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.

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4y133

Mon Sep 03 2007, 04:11PM

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ok. Thanks ajay for ur information.

milky

Tue Oct 30 2007, 09:34PM

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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?

Ajay

Tue Oct 30 2007, 09:52PM

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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.

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MATHIVANAN

Wed Oct 31 2007, 07:15AM

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hey milky
if u want load only one data from address location of ram means , u can do following instruction

LDS r16,$0061
this instruction will directly load the data from ram location $0061
and also if u want store directly means

STS $0061,r16

this will store the data to the location $0061

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Robbby

Sun Dec 09 2007, 10:39AM

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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

[ Edited Sun Dec 09 2007, 10:41AM ]