2011-07-01 AVR disassembler

Disassembler for Atmel AVR microcontrollers made for be fast and simple. No extra features only
basics.  Converts binary file to AVR asm output.

If you have ihex then you can convert it to binary with
ReprBin

Here is example output

2411      CLR   0x11  
be1f      OUT   0x3f   , 0x1    
e5cf      LDI   0xc    , 0x5f   
e0d4      LDI   0xd    , 0x4    
bfde      OUT   0x3e   , 0x1d   
bfcd      OUT   0x3d   , 0x1c   
e010      LDI   0x1    , 0x0    
e6a0      LDI   0xa    , 0x60   
e0b0      LDI   0xb    , 0x0    
ebee      LDI   0xe    , 0xbe   
e0f0      LDI   0xf    , 0x0    
c002      RJMP  +4    
9005      LPM   0x0   
920d      ST    0x0    , 0x0    
36a0      CPI   0xa    , 0x60   
07b1      CPC   0x1b   , 0x11   
f7d9      BRBC  0x1    , -10 
e010      LDI   0x1    , 0x0    
e6a0      LDI   0xa    , 0x60   
e0b0      LDI   0xb    , 0x0    
c001      RJMP  +2    

2009-11-09 AVR

Echo to UART

2009-11-09 AVR echo

This code tested on ATmega16

#include <avr/io.h>

#define FOSC 16000000UL
#define BAUD 9600
#define MYUBRR FOSC/16/BAUD-1

void USART_Init( unsigned int ubrr)
{
	UBRRH = (unsigned char)(ubrr>>8);
	UBRRL = (unsigned char)ubrr;
	UCSRB = (1<<RXEN)|(1<<TXEN);
	UCSRC = (1<<URSEL)|(1<<USBS)|(3<<UCSZ0);
}

int main()
{
	char c;
	USART_Init( MYUBRR );
	while(1)
	{
		while ( !(UCSRA & (1<<RXC))){};
		c = UDR;
		while (!(UCSRA & (1<<UDRE))){};
		UDR = c;
	}
	return 0;
}