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南京工程学院毕业设计说明书（论文）

;

adc r21,r14 adc r22,r15 ldi r26,$62 st st st

x+,r20 x+,r21 x+,r22

;保存压力值

rjmp ppp

ldi r26,$3e

;有否RS-232命令？

ld r16,x cpi r16,$50 ;是否单次发送命令？ brne qqq clr r16 ;清单次命令

;准备发送压力

st x,r16 ppp: ldi r26,$10

rcall bcd ldi r26,$10 ldi r28,$20 ldi r17,3

ldi r18,$30 ppp1: ld r16,x+ cpi r16,0 brne ppp2

ldi r16,$20 st y+,r16 dec r17 brne ppp1 rjmp ppp3

add r16,r18 y+,r16

ppp2: st

ld r16,x+ dec r17

brne ppp2

ppp3: ldi r26,$13

ld r16,x+ add r16,r18 st y+,r16 ldi r16,$2e st

y+,r16 ld r16,x+ add r16,r18 st y+,r16

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;\

南京工程学院毕业设计说明书（论文）

ld r16,x+ add st ldi st

r16,r18 y+,r16 r16,$0d y+,r16

rcall fasong rjmp ad02

;是否连续发送命令？

qqq: cpi r16,$51 sss:

brne sss

rjmp ppp

cpi r16,$53 ;是否“S”命令？ brne k_0 clr r16 ;清单次命令 st x,r16 ldi r30,$60 ldi r31,$0e ldi r26,$20 ldi r25,13 call dushu

;读传感器系列号

rcall fasong rjmp ad02

k_0: cpi r16,$58

brne yali clr r16

;是否发送参数命令？

;清单次命令

;\

st x,r16 ldi r26,$44 ld r20,x+ ld r21,x+ ld r22,x+ ldi r26,$10 rcall bcd ldi r26,$10 ldi r28,$20 ldi r18,$30 ld r16,x+ add r16,r18 st

y+,r16 ldi r16,$2e st y+,r16 ldi r17,5

;\

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南京工程学院毕业设计说明书（论文）

k_01: ld r16,x+ add r16,r18 st y+,r16 dec r17 brne k_01 ldi r16,$20 st

y+,r16

;\

ldi r26,$48 ;\

ld r20,x+ ld r21,x+

ld r22,x+ ldi r26,$10 rcall bcd ldi r26,$10

ldi r17,3

ldi r18,$30 k_02: ld r16,x+ cpi r16,0 brne k_03 ldi r16,$20 st y+,r16 dec r17 brne k_02

rjmp k_04

k_03: add r16,r18 st y+,r16

ld r16,x+ dec r17

brne k_03

k_04: ldi r26,$13 ld r16,x+ add r16,r18 st y+,r16 ldi r16,$2e st y+,r16 ld r16,x+ add r16,r18 st y+,r16 ld r16,x+ add r16,r18 st y+,r16 ldi r16,$0d

st y+,r16

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;\

南京工程学院毕业设计说明书（论文）

rcall fasong rjmp ad02

yali: sbrs r2,7 ;显示\

rjmp dmmhg

rcall kpa

rjmp jgaodu dmmhg: sbrs r2,6 ;显示\

rjmp dpsi

rcall mmhg rjmp jgaodu dpsi: sbrs r2,5 ;显示\

rjmp dhpa

rcall psi

rjmp jgaodu dhpa: rcall hpa ;显示\

jgaodu: rcall gaodu

;保存当前高度 ldi r26,$65 st x+,r13 st

x+,r14

st x+,r15

mov r20,r13 ;显示高度

mov r21,r14

mov r22,r15

sbrs r2,3 ;是否计算相对高度？ rjmp h

ld r16,x+ ld r17,x+ ld r18,x+ ldi r19,$80 add r18,r19 add r22,r19 sub r20,r16

sbc r21,r17

sbc r22,r18

h: sbrs r2,4 ;是否计算“ft”？

rjmp m rcall ft m: rcall bcdh

48