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I'm a newbie with MSP-EXP430G2 Launchpad. Have successfully used C sample files, but can't build from sample *.asm files. Below is a TI demo file I've copied into a file I've named "Butterfinger1.asm." Pasted afterwards are error messages. I speculate that CCS is trying to compile a C program because there is mention of an unresolved symbol "main." What am I doing wrong? Is there a tutorial that would coach me through an assembly exercise?
Thanks very much,
Steve Scholl
;*******************************************************************************
; MSP430G2xx1 Demo - Software Poll P1.4, Set P1.0 if P1.4 = 1
;
; Description: Poll P1.4 in a loop, if hi P1.0 is set, if low, P1.0 reset.
; ACLK = n/a, MCLK = SMCLK = default DCO
;
; MSP430G2xx1
; -----------------
; /|\| XIN|-
; | | |
; --|RST XOUT|-
; /|\ | |
; --o--|P1.4 P1.0|-->LED
; \|/
;
; D. Dang
; Texas Instruments Inc.
; October 2010
; Built with Code Composer Essentials Version: 4.2.0
;*******************************************************************************
.cdecls C,LIST, "msp430g2231.h"
;------------------------------------------------------------------------------
.text ; Program Start
;------------------------------------------------------------------------------
RESET mov.w #0280h,SP ; Initialize stackpointer
StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT
SetupP1 bis.b #001h,&P1DIR ; P1.0 output
;
Mainloop bit.b #010h,&P1IN ; P1.4 hi/low?
jc ON ; jmp--> P1.4 is set
;
OFF bic.b #001h,&P1OUT ; P1.0 = 0 / LED OFF
jmp Mainloop ;
ON bis.b #001h,&P1OUT ; P1.0 = 1 / LED ON
jmp Mainloop ;
;
;------------------------------------------------------------------------------
; Interrupt Vectors
;------------------------------------------------------------------------------
.sect ".reset" ; MSP430 RESET Vector
.short RESET ;
.end
**** Build of configuration Debug for project BCH ****
C:\Program Files\Texas Instruments\ccsv4\utils\gmake\gmake -k all
'Building target: BCH.out'
'Invoking: Linker'
"C:/Program Files/Texas Instruments/ccsv4/tools/compiler/msp430/bin/cl430" -vmsp -g --define=__MSP430G2231__
--diag_warning=225 --printf_support=minimal -z -m"BCH.map" --stack_size=50 --heap_size=0 --warn_sections
-i"C:/Program Files/Texas Instruments/ccsv4/msp430/include" -i"C:/Program Files/Texas
Instruments/ccsv4/tools/compiler/msp430/lib" -i"C:/Program Files/Texas
Instruments/ccsv4/tools/compiler/msp430/include" --reread_libs --rom_model -o "BCH.out" "./Butterfinger1.obj"
-l"libc.a" "../lnk_msp430g2231.cmd"
<Linking>
"../lnk_msp430g2231.cmd", line 87: error: placement fails for object ".reset",
size 0x4 (page 0). Available ranges:
RESET size: 0x2 unused: 0x2 max hole: 0x2
undefined first referenced
symbol in file
--------- ----------------
main C:\Program Files\Texas Instruments\ccsv4\tools\compiler\msp430\lib\rts430.lib<boot.obj>
error: unresolved symbols remain
error: errors encountered during linking; "BCH.out" not built
>> Compilation failure
gmake: *** [BCH.out] Error 1
gmake: Target `all' not remade because of errors.
Build complete for project BCH
Severity and Description Path Resource Location Creation Time Id
errors encountered during linking; "BCH.out" not built BCH line 0 1296444904828 65
placement fails for object ".reset", size 0x4 (page 0). Available ranges: RESET size: 0x2 unused:
0x2 max hole: 0x2 BCH line 0 1296444904828 63
unresolved symbol main, first referenced in C:\Program BCH line 0 1296444904828 64
