仪隆单片机高手:
不好意思刚用仪隆的片子,有许多地方不明白,日前自己写了一个跑马灯的程序,在单步执行时据然发现不对,请参考程序:
;***************************************
;***************************************
;Ver. : A.0
;CPU : EM78156
;==============================================================
;Special Registers Define
INDI == 0x0 ;
RTCC == 0x1 ;
PC == 0x2 ;
STATUS == 0x3 ;
FSR == 0x4 ;
PORT5 == 0x5 ;
PORT6 == 0x6 ;
INTF == 0xF ;
;Control Registers Define定义控制寄存器
IO_P5 == 0x5 ;
IO_P6 == 0x6 ;
IO_PD == 0xB ;
IO_OC == 0xC ;
IO_PU == 0xD ;
IO_WDT == 0xE ;
IO_IE == 0xF ;
;-------------------------------------------------------------------
;Bits define
;STATUS Register bits define
C == 0
DC == 1
Z == 2
P == 3
T == 4
PS0 == 5
PS1 == 6
;Interrupt status bits define
TCIF == 0
ICIF == 1
EXIF == 2
;Interrupt mask register bits define
TCIE == 0
ICIE == 1
EXIE == 2
;-------------------------------------------------------------------
accback == 0x10
STATUSback == 0x11
temp1 == 0x12
temp2 == 0x13
flag1 == 0x14
temp3 == 0x15
flag == 0x16
tmcount1 == 0x17
tmcount2 == 0x18
tcc_count == 0x19
temp4 == 0x1a
temp5 == 0x1b
;--------------------------------------------------------------
;==============================================================
ORG 0
JMP MAIN
;==============================================================
ORG 8
jmp tcc_int ;150us中断一次
nop
RETI
;---------------------------------------------------------------
;***************************************************************
;=================================================
MAIN:
MOV A,@0
IOW IO_WDT
IOW IO_P5
IOW IO_P6
clr port5
CLR PORT6
contr
and a,@0b11010000
or a,@0b00000001 ;1:4
contw
mov a,@0x01
iow INTF
eni
mov a,@0x10
mov fsr,a
clrram:
inc fsr
clr INDI
jbc fsr,5
jbs fsr,4
jmp clrram
loop:
wdtc
;call led1
nop
call led2
nop
; call led3
wdtc
; call led4
nop
; call led5
nop
; call led6
jmp loop
;*****************************************
led1:
jbc flag,0
ret
jbc flag,1
jmp led1a
bs port6,4
bs flag,1
jbc flag,2
jmp led1b
ret
;*****************************************
led1a:
bc port6,4
bc flag,1
bs flag,2
ret
led1b:
bs flag,3
bs flag,0
ret
;****************************************
led2: ;
jbs flag,3
call led2out
jbs flag1,0
call led2_1
jbc flag1,1
call led2_2
jbc flag1,2
call led2_3
jbc flag1,3
call led2_4
jbc flag1,4
call led2_5
jbc flag1,5
call led2_6
ret
led2_1:
nop
wdtc
bs port6,5
mov a,tmcount1
xor a,temp3
jbs STATUS,z
jmp $-5
nop
wdtc
bc port6,5
mov a,tmcount2
xor a,temp4
jbs STATUS,z
jmp $-5
bs flag1,0
bs flag1,1
clr tmcount1
clr tmcount2
ret
led2_2:
nop
wdtc
bs port6,5
mov a,tmcount1
xor a,temp3
jbs STATUS,z
jmp $-5
nop
wdtc
bc port6,5
mov a,tmcount2
xor a,temp4
jbs STATUS,z
jmp $-5
bc flag1,1
bs flag1,2
clr tmcount1
clr tmcount2
ret
led2_3:
nop
wdtc
bs port6,5
mov a,tmcount1
xor a,temp3
jbs STATUS,z
jmp $-5
nop
wdtc
bc port6,5
mov a,tmcount2
xor a,temp4
jbs STATUS,z
jmp $-5
bc flag1,2
bs flag1,3
clr tmcount1
clr tmcount2
ret
led2_4:
nop
wdtc
bs port6,5
mov a,tmcount1
xor a,temp3
jbs STATUS,z
jmp $-5
nop
wdtc
bc port6,5
mov a,tmcount2
xor a,temp4
jbs STATUS,z
jmp $-5
bc flag1,3
bs flag1,4
clr tmcount1
clr tmcount2
ret
led2_5:
nop
wdtc
bs port6,5
mov a,tmcount1
xor a,temp3
jbs STATUS,z
jmp $-5
nop
wdtc
bc port6,5
mov a,tmcount2
xor a,temp4
jbs STATUS,z
jmp $-5
inc temp3
djz temp4
jmp led2_5a
bs flag1,5
clr tmcount1
clr tmcount2
ret
led2_5a:
bc flag1,4
bc flag1,0
clr tmcount1
clr tmcount2
ret
led2_6:
bs port6,5
bc flag,3
bs flag,4
clr flag1
ret
led2out:
mov a,@0X01
mov temp3,a
mov a,@0x3b
mov temp4,a
bs flag,3 ;暂时的
clr tmcount1
clr tmcount2
ret
;****************************************
tcc_int:
mov accback,a
mov a,STATUS
mov STATUSback,a
mov a,@0x0B8
mov rtcc,a
and a,@0xfe
mov IO_IE,a
inc tcc_count
inc tmcount1
inc tmcount2
mov a,@0X0c8
xor a,tcc_count
jbs STATUS,z
jmp int_out
clr tcc_count
inc temp1
mov a,@0X22
xor a,temp1
jbs STATUS,z
jmp int_out
inc temp2
clr temp1
int_out:
mov a,STATUSback
mov STATUS,a
mov a,accback
reti
我的程序目的是控制一个LED灯慢慢的点亮,我的思路是这样的,在9MS的一个脉冲周期内改变其占空比来实现,相同的占空比运行5次,可是现在问题出现在,我单步执行时CALL完一个子程序退回时没有退到下一个子程序上,而是其它的子程序中间位置上去?例如:我CALL完LED2_1后,应该退回到LED2程序下的JBC FLAG1,1这条指令吧,但是现在不是退回到这里?是什么原因,请帮忙分析一下吧,谢谢! |
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