8-bit Microcontrollers中的主题 Re: Runtime object '_ICMP' in Bootloader code?

Runtime object '_ICMP' in Bootloader code?

dpaul — Mon, 27 Dec 2010 22:48:20 GMT

Greetings!

Using CodeWarrior 5.9.0 for the MC9S0AC32 micro, I am using the pragmas

#pragma MESSAGE WARNING C3605 // enable C3605 warning
<boot loader code here>

#pragma MESSAGE DISABLE C3605 // disable C3605 message

to signal if my boot loader code is making object calls outside the pragmas (which won't be there, of course, during boot loading).

Sure enough, I get a couple of the following warnings:

Warning: : C3605: Runtime object '_ICMP' used at PC...

Has anyone any idea what _ICMP is and how I might rid myself of it (other that trying other random way of coding the same thing in hopes the call will disappear)?

Thanks for any comments!

Doug

PS: i know! I know! Should have the boot loader in a separate app to avoid exactly this problem, but I'm stuck with this inherited approach. Such is life!

Re: Runtime object '_ICMP' in Bootloader code?

kef — Tue, 28 Dec 2010 02:37:03 GMT

See \lib\hc08c\src\rtshc08.c . It's 16 bits integer compare routine. Try disassembling your code, then find which expression calls _ICMP and modify that expression slightly. On S08 16 bit integer compare is usually done using CPHX instruction.

Re: Runtime object '_ICMP' in Bootloader code?

CompilerGuru — Tue, 28 Dec 2010 04:23:22 GMT

Optimize for time may help with the integer comparison runtime.

Also try to code the 16 bit comparison with operand as constant or variable. When comparing 2 computed expressions, CPHX cannot be easily used.

Daniel