I use this code:
#include <reg52.h> void main(void) { unsigned char data x8,x9,x10; while(1) { x8 = 0; x9 = 9; x10 = x8 + x9; __asm CLR A; } }
; void main(void) RSEG ?PR?main?MAIN main: USING 0 ; SOURCE LINE # 5 ; { ; SOURCE LINE # 6 ?C0001: ; unsigned char data x8,x9,x10; ; while(1) ; SOURCE LINE # 8 ; { ; SOURCE LINE # 9 ; x8 = 0; ; SOURCE LINE # 10 ;---- Variable 'x8?040' assigned to Register 'R7' ---- CLR A MOV R7,A ; x9 = 9; ; SOURCE LINE # 11 ;---- Variable 'x9?041' assigned to Register 'R6' ---- MOV R6,#09H ; x10 = x8 + x9; ; SOURCE LINE # 12 ADD A,R6 MOV x10?042,A ; __asm CLR A; CLR A; ; } ; SOURCE LINE # 14 SJMP ?C0001 RET ; END OF main END
C_STARTUP: C:0x0000 020003 LJMP STARTUP1(C:0003) STARTUP1: C:0x0003 787F MOV R0,#0x7F C:0x0005 E4 CLR A IDATALOOP: C:0x0006 F6 MOV @R0,A C:0x0007 D8FD DJNZ R0,IDATALOOP(C:0006) C:0x0009 758108 MOV SP(0x81),#0x08 C:0x000C 020000 LJMP C_STARTUP(C:0000)========>You see here!!! MAIN: C:0x000F E4 CLR A C:0x0010 FF MOV R7,A C:0x0011 7E09 MOV R6,#0x09 C:0x0013 2E ADD A,R6 C:0x0014 F508 MOV 0x08,A C:0x0016 E4 CLR A C:0x0017 80F6 SJMP MAIN(C:000F) C:0x0019 22 RET
__asm is not mentioned in the v6.20 manual. Is this an undocumented feature?
Someone told me the "__asm". But, use this code
#pragma asm CLR A #pragma endasm
__asm CLR A
My first guess is that as far as the linker is concerned, you are generating a pure assembly program. Therefore the linker is not setting the C enviroment correctly. To fix this add a dummy C file that is translated using the compiler.
P.S. What does the author name of 11 22 represent?
My brother's nickname is 1212, so I call myself 1122, it is simple.
I am so sorry! I forget to add c51s.lib to my project though I add startup.a51. Now, my test project includes main.c, startup.a51 and c51s.lib, right click the file main.c and select the two options, then build it, then debug it, it seems everything is OK!
I am so sorry! I forgot to add c51s.lib to my project. Now, my test project includes main.c, startup.a51 and c51s.lib, right click the file main.c and select two options, then build it, then debug it, and everything seems is OK.