【正文】 測量儀表的上限AX實(shí)際測量值N0儀表下限對應(yīng)的數(shù)字量NM儀表上限對應(yīng)的數(shù)字量NX測量值對應(yīng)的數(shù)字量流程圖如下溫度非線性轉(zhuǎn)換程序模塊采用折線擬合法進(jìn)行線性化處理如下圖所示分為以下幾段當(dāng)3298mV≤WN 734mV時(shí)T℃ 2447WN1841當(dāng)734mV≤WN 11411mV時(shí)T℃ 2456WN1970當(dāng)11411mV≤WN 15599mV時(shí)T℃ 2388WN2753當(dāng)15599mV≤WN 19846mV時(shí)T℃ 2355WN3271當(dāng)19846mV≤WN時(shí)T℃ 500℃分段如下圖所示流程圖如下所示 YN YN YN YN4．源程序STACK SEGMENT STACK DW 256 DUP STACK ENDSDATA SEGMENT SAVEBUFF DB 256 DUP 00H TK DB 64HK0 DB 00H54H35HK1 DB 01H20H00HK2 DB 00H00H00HK3 DB 00H00H00HP1 DB 00H71H70HP2 DB 00H00H00HP3 DB 00H00H00HSAVEMARK DB 00HSAVEADDR DB 0FFHCONTROLMARK DB 00HEKB DB 00HK0_16 DB 00H00H00HK1_16 DB 00H00H00HK2_16 DB 00H00H00HK3_16 DB 00H00H00HP1_16 DB 00H00H00HP2_16 DB 00H00H00HP3_16 DB 00H00H00HEK DW 0000HEKK DW 0000HEK_1 DW 0000HEK_2 DW 0000HUK DW 0000HUKK DW 0000HUK_1 DW 0000HUK_2 DW 0000HOUTPUT DW 0000HALLK_ALLP DW 0000HSET DB 溫度設(shè)定值NX DB 濾波后AD轉(zhuǎn)換值 WN DB 工程量變換結(jié)果SUM DB C1C2C3 AD三次采樣值TEM DB 顯示溫度8255PORT DW 0010H0012H0014H0016H 8255地址8253PORT DW 0004H000EH 8253地址0809PORT DW 0006H001EH 0809地址7218PORT DW 0020H0000H 7218地址DISPLAY DW 顯示溫度二進(jìn)制值DATA ENDSCODE SEGMENT ASSUME CSCODEDSDATASTART MOV AXDATA 初始化數(shù)據(jù)段各芯片 MOV DSAX MOV BXOFFSET 8255PORT MOV DX[BX3] MOV AL81H 方式0C口底四出其余入 OUT DXAL MOV BXOFFSET 8253PORT MOV DX[BX1] MOV AL00H OUT DXAL 計(jì)數(shù)器0工作于方式0二進(jìn)制計(jì)數(shù) MOV BXOFFSET 7218PORT MOV DX[BX] MOV ALA0H OUT DXAL 十進(jìn)制軟件譯碼KEYS CALL KEYCHECK 鍵盤掃描程序 JZ KEYS CALL D10MS CALL KEYCHECK JZ KEYS MOV AL0FEH MOV AH0 MOV DX[BX2] OUT DXAL MOV DX[BX] IN ALDX CMP AL1EH JZ KEY1 CMP AL1DH JZ KEY2 CMP AL1BH JZ KEY3 CMP AL17H JZ KEY4 CMP AL0FH JZ KEY5 JMP KEYSKEY1 MOV AH00H JMP TRANSKEY2 MOV AH44H JMP TRANSKEY3 MOV AH88H JMP TRANSKEY4 MOV AHCCH JMP TRANSKEY5 MOV AHFFH JMP TRANSTRANS MOV [SET]AH 讀設(shè)定值到SET單元ADCH MOV BXOFFSET 0809PORT 啟動(dòng)AD轉(zhuǎn)換 MOV DX[BX] OUT DXAL MOV X[BX1]CHANGE IN ALDX TEST AL80H JZ CHANGE MOV DX[BX] IN ALDX MOV AH00H MOV CX0003H MOV [BXAH]AL INC AH LOOP ADCHFILTER LEA SISUM 數(shù)字濾波限速濾波 MOV AL[SI2] SUB AL[SI] JNC DONE1 NEG ALDONE1 MOV DLAL MOV BL[SI3] SUB BL[SI2] JNC DONE2 NEG BLDONE2 ADD ALBL SHR AL1 CMP DLAL MOV CL[SI2] JBE DONE CMP BLAL MOV CL[SI3] JBE DONE MOV AL[SI2] ADD AL[SI3] SHR AL1 MOV [SI3]AL MOV CLALDONE MOV DL[SI2] MOV [SI]DL MOV DL[SI3] MOV [SI2]DL MOV [NX]CL CMP [NX]0FFH JE CAUTION 判斷是否該提醒操作人員 MOV BXOFFSET 8255PORT 無提醒則點(diǎn)亮綠燈 MOV DX[BX1] MOV AL01H OUT DXAL CALL CONFIG 調(diào)數(shù)字控制器子程序 CALL BIAODU 調(diào)標(biāo)度變換子程序 CALL GCBH 調(diào)工程量變換子程序 CALL TEMBC 調(diào)溫度非線性補(bǔ)償子程序 MOV BXOFFSET PORT7218 溫度顯示程序 MOV R1[DISPLAY] R1指向顯示緩沖區(qū) MOV R2 08H R2作8位顯示計(jì)數(shù)器CLOOP MOV AL00H 將8位顯示緩沖區(qū)中的數(shù)據(jù)送ICM7218A MOV DX[BX1] OUT DXAL INC R1 DJNZ R2CLOOP BIAODU PROC NEAR 標(biāo)度變換子程序 RET BIAODU ENDPGCBH PROC NEAR 工程量變換子程序 RET GCBH ENDPTEMBC PROC NEAR 溫度非線性補(bǔ)償子程序 RET TEMBC ENDPCONFIG PROC NEAR 數(shù)字控制器子程序