Confusion about using WORD or Byte address in asm("jmp&

Log in or register to post comments
Go To Last Post
3 posts / 0 new
Author
Message
micky2
micky2's picture
Level: Wannabe
Joined: Tue. Jun 7, 2011
Posts: 54 View posts
#1
Posted by micky2: Wed. Jun 26, 2013 - 11:53 AM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

While using asm("jmp 0x1000"); in Studio6, which address I have to use? Byte address or WORD address?

Tags:

Tools, Atmel Studio (AVR-related)
Top
Gold Markclawson
clawson's picture
Level: Moderator
Joined: Mon. Jul 18, 2005
Posts: 101067 View posts
Location: (using avr-gcc in) Finchingfield, Essex, England
Posted by clawson: Wed. Jun 26, 2013 - 12:53 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Surely you can just check this:

int main(void) {
	asm("jmp 0x1234" );
}

If I build/run that in the AS6 simulator it arrives at word address 0x91A, byte address 0x91A * 2 = 0x1234.

So what you put in the JMP opcode is the BYTE destination of where you want to get to.

Top
snigelen
snigelen's picture
Level: Posting Freak
Joined: Thu. Jan 8, 2009
Posts: 1952 View posts
Location: Lund, Sweden
Posted by snigelen: Wed. Jun 26, 2013 - 01:09 PM
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Or you could try to compile this

	asm("jmp 0x321");

:twisted:

Top