Migrating Assembly Code from HC11 to HC12 (MC9S12A32, specifically)

drewrainwater — Wed, 06 Jan 2010 13:46:38 GMT

I'm looking for a starting point for documentation on migrating existing HC11 assembly code (written by a previous employee) to the MC9S12A32.

It was my understanding that there should be complete coverage of HC11-based assembly code by the HC12 assembler, but I'm seeing assembly errors on BSET/BCLR and BRSET/BRCLR instructions.

All of my previous experience has been with 8052 processors, so I apologize for starting from scratch here. Like I said, I'm looking for someone to hopefully point out a good starting point.

If it helps, a few of the instructions that are throwing assembly errors:

BSET 2,Y $04 (illegal addressing mode error)

BRCLR FLAG #$20 DBDELAY (illegal addressing mode error)

Thanks in advance.

Drew

Re: Migrating Assembly Code from HC11 to HC12 (MC9S12A32, specifically)

kef — Wed, 06 Jan 2010 15:14:01 GMT

Commas are missing. Probably your HC11 assembler had weaker errors checking.

BSET 2,Y, #$04

BRCLR FLAG, #$20, DBDELAY

S12 / MagniV MicrocontrollersのトピックMigrating Assembly Code from HC11 to HC12 (MC9S12A32, specifically)

Migrating Assembly Code from HC11 to HC12 (MC9S12A32, specifically)

Re: Migrating Assembly Code from HC11 to HC12 (MC9S12A32, specifically)