我使用的IC是ST7FLITE05Y0M6,使用的晶振是1M的内部晶振。程序如下所示。我想实现的效果是让PA3控制的LED灯先灭2.5秒左右，然后亮1秒左右，再灭2.5秒，如此循环下去。可是实现不了我所想的效果
st7/
;------------------------------------------------------
; SEGMENT MAPPING FILE AUTOMATICALLY GENERATED BY STVD7
; SHOULD NOT BE MANUALLY MODIFIED.
; CHANGES WILL BE LOST WHEN FILE IS REGENERATED.
;------------------------------------------------------
TITLE "KF85.ASM"
MOTOROLA
#INCLUDE "st7flite05.inc"
BYTES ; The following addresses are 8 bits long
segment byte at 80-FF 'ram0'
MMSH DS.B $1
MMSL DS.B $1
TEMP DS.W $2
WORDS ; The following addresses are 16 bits long
segment byte at FA00-FFDF 'rom'
TL1 DC.B $0E2
TH1 DC.B $04
TL2 DC.B $0E8
TH2 DC.B $03
COUNT DC.B $10
COUNT1 DC.B $10
MAIN:
LD A,#$0
LD PBDDR,A
LD A,#$05
LD PBOR,A
LD A,#$0F
LD PADDR,A
LD PAOR,A
CLR PADR
LD A,$0FFDE
LD RCCR,A
LD A,#$10
LD LTCSR,A
LD A,#0
LD MMSH,A
;LD A,#255
LD MMSL,A
BSET PADR,#2
BRES PADR,#3
RIM
JRA *
TBINT:
LD A,LTCSR
LD A,#$01
CP A,MMSH
JRNE L2
L1:
LD A,MMSL
CP A,#$02C
JRULT L2
CP A,#$90 ;持续亮1000ms后变为灭
JRULE L5
JRA L6
L2:
INC MMSL
JRNE L4
INC MMSH
JRA L4
L5:
INC MMSL
BSET PADR,#3
JRA L4
L6:
BRES PADR,#3
LD A,#0
LD MMSL,A
LD MMSH,A
L4:
IRET
NonHandledInterrupt
iret
WORDS ; The following addresses are 16 bits long
segment byte at FFE0-FFFF 'vectit'
DC.W NonHandledInterrupt ;FFE0-FFE1h location
DC.W NonHandledInterrupt ;FFE2-FFE3h location
DC.W TBINT;FFE4-FFE5h location
DC.W NonHandledInterrupt ;FFE6-FFE7h location
DC.W NonHandledInterrupt ;FFE8-FFE9h location
DC.W NonHandledInterrupt ;FFEA-FFEBh location
DC.W NonHandledInterrupt ;FFEC-FFEDh location
DC.W NonHandledInterrupt ;FFEE-FFEFh location
DC.W NonHandledInterrupt ;FFF0-FFF1h location
DC.W NonHandledInterrupt ;FFF2-FFF3h location
DC.W NonHandledInterrupt ;FFF4-FFF5h location
DC.W NonHandledInterrupt ;FFF6-FFF7h location
DC.W NonHandledInterrupt ;FFF8-FFF9h location
DC.W NonHandledInterrupt ;FFFA-FFFBh location
DC.W NonHandledInterrupt ;FFFC-FFFDh location
DC.W MAIN ;reset
END
我的问题是，在DEBUG调试的过程中可以看到定时周期为8ms，并且可以循环地进入到定时中断。可是就是看不到灯会闪烁，奇怪。请各位高手帮我解答，谢谢！ |
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