gnupic: Re: [gnupic] Re: [PATCH] CONFIG feature progress
Subject:
RE: [gnupic] Re: [PATCH] CONFIG feature progress
From:
"Chen Xiao Fan" ####@####.####
Date:
24 Jan 2006 09:28:25 +0000
Message-Id: <7D4AB72251D4D949AB2732ABEABDA54F12FFF5@PFSG-MX1.ap.p-f.biz>
> -----Original Message-----
> From: Michael Ballbach ####@####.####
> Sent: Friday, January 20, 2006 4:59 PM
> To: ####@####.####
> Subject: Re: [gnupic] Re: [PATCH] CONFIG feature progress
> I've not confirmed all of this experimentally, but it's my current
> thinking. I'll have to try mixing CONFIG directives through multiple
> ASM files in MPASM and see what it does. My gut feeling is that if it
> allows it, it will be non-trivial to make work in GPASM, but I'm still
> pretty new to the code base.
MPASM allows it. I just tried out the 2550tmpo.asm example and I
add another two asm files with only one line of
configuration setting in each file. The first one has
"CONFIG WRTC = ON" and the second one has "CONFIG BOR = ON".
From the map files we can see clearly what MPASM/MPLINK are doing.
.config_300001_2550TMPO.O romdata 0x300001 program 0x000001
.config_300002_2550TMPO2.O romdata 0x300002 program 0x000001
.config_30000B_2550TMPO1.O romdata 0x30000b program 0x000001
The hex file generated:
:020000040030CA
:0100010000FE (CONFIG FOSC = XT_XT)
:010002000FEE (CONFIG WRTC = ON)
:01000B00C034 (CONFIG BOR = ON)
> I just gpvo'd an object file with a bunch of CONFIG
> directives in it and it did look like it had a section per CONFIG
> address. You may need my newcoff patch on the website to view such
> coff files, since they have 1 byte sections (the patch will pad it
> out to a word so that it gets displayed).
Yes the patched gpvo works with the COFF files generated by
MPLAB 7.22. For example, the file with "CONFIG WRTC = ON"
generates the one byte section. I also notice that
maybe there is a bug in the patched gpvo. The Time Stamp
is wrong. It is still Tuesday Jan 24 2006 here.
$ gpvo 2550tmpo2.o
COFF File and Optional Headers
Processor Type 18f2550
Time Stamp Wed Jan 25 06:07:35 2006 <maybe bug!>
Number of Sections 1
Number of Symbols 11
Characteristics 0
Section Header
Name .config_300002_2550TMPO2.O
Address 0x300002
Size of Section 1
Number of Relocations 0
Number of Line Numbers 1
Flags 0x1100
Initialized data for ROM.
Absolute.
Data
300002: ff0f
memory is : 0
...<skipped>...
Regards,
Xiaofan
