8-bit MicrocontrollersのトピックRe: Instruction set of MC9S08Q8 - Codewarrior vs reference manual CPX HC08 vs RS08

Instruction set of MC9S08Q8 - Codewarrior vs reference manual CPX HC08 vs RS08

xtronics — Thu, 27 Jan 2011 14:37:37 GMT

CPX is listed in the "MC9S08Q8 MCU Series Reference Manual, Rev 3" as a valid instruction - lists the core as S08CPUV4.

But CodeWarrior says that instruction is only for the RS08.

If the reference manual is wrong, that would be a very serious documentation error.

If Codwarrior (10.0) is wrong it seems to not want to let me change to RS08 instruction set.

Re: Instruction set of MC9S08Q8 - Codewarrior vs reference manual CPX HC08 vs RS08

bigmac — Thu, 27 Jan 2011 14:51:45 GMT

Hello,

The CPX assembly instruction has "always" existed, right back to HC05 family, and probably even earlier. What addressing mode are you attempting to use? Are you attempting to use the instruction within an assembly project, or as inline assembly code? What error message are you getting when you attempt to assemble the code?

Regards,

Mac

Re: Instruction set of MC9S08Q8 - Codewarrior vs reference manual CPX HC08 vs RS08

xtronics — Thu, 27 Jan 2011 14:58:16 GMT

Just found it -- I had cmpx instaed of cpx - too many different instruction sets in my head.

The error said it was an opcode for RS08 only... turns out it is a psudo instruction for the RS08 ...