这个是汇编代码
2: main()
3: {
4: char s=0xfe;
C:0x0003 7FFE MOV R7,#0xFE
5: while(1)
6: {
7: if(s==0xff)
C:0x0005 EF MOV A,R7
C:0x0006 FD MOV R5,A
C:0x0007 33 RLC A
C:0x0008 95E0 SUBB A,ACC(0xE0)
C:0x000A FC MOV R4,A
C:0x000B ED MOV A,R5
C:0x000C F4 CPL A
C:0x000D 4C ORL A,R4
C:0x000E 7002 JNZ C:0012
8: s=0xfe;
C:0x0010 7FFE MOV R7,#0xFE
9: s=s<<1|0x01;
C:0x0012 EF MOV A,R7
C:0x0013 25E0 ADD A,ACC(0xE0)
C:0x0015 4401 ORL A,#0x01
C:0x0017 FF MOV R7,A
10: P1=s;
C:0x0018 F590 MOV P1(0x90),A
11: }
C:0x001A 80E9 SJMP C:0005
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