ATMEGA128 programming problem

[awaisaamir]

hy

i recently start working with ATmega128 , i program it but i cant get output but in proteus it show output. i use avr studio 6

i post code here

#include <avr/io.h>

int main(void)
{
	
	DDRD=0xFF;
    while(1)
    {
        //TODO:: Please write your application code 
		PORTD=0xF0;
    }
}

thanks.

 

[alexan_e]

I don't see anything wrong with the code, it sets PORTD as output ad then sets bits 7-6-5-4 to high.

What does proteus simulation show?
Have you loaded the hex/elf file correctly to the proteus mcu model?

EDIT: ok, you actually said hardware problem so I have no idea what can be wrong in order to make this not work.
If it was a clock problem you wouldn't be able to program the device.

 

[ismbn]

hi
you r getting problem in proteus or in hardware?

 

[internetuser2k12]

He is not getting o/p in hardware.

 

[alexan_e]

mega128 has three grounds and two Vcc and one AVcc , have you connected them all to power supply?

 

[awaisaamir]

yes i connected all supply , controller is on but only JTAG pins are on HIGH state

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this code is ok ??

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what fuse setting should be for this code i am using 12 MHZ crystal oscillator

 

[alexan_e]

You can use the fuse calculator https://www.engbedded.com/fusecalc

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CKOPT should be programed for crystal >8MHz