【正文】 MOVWF TEMP 。將當(dāng)前通道數(shù)送HEIGHT DECFSZ AD_COUNT,1 。否，將采樣結(jié)果與門限值比較 MOVLW 00H 。退出采樣循環(huán)TMR1_NEXT1 MOVF TEMP SUBWF GATE_VALUE,0 。檢測(cè)是否產(chǎn)生借位 GOTO TEST_LOOP 。是，熄滅下限報(bào)警燈 BCF PORTD,5 。清借位標(biāo)志位 MOVLW 15H SUBWF HEIGHT 。檢測(cè)借位標(biāo)志位是否為1 GOTO TMR1_NEXT3 。是，點(diǎn)亮上限報(bào)警燈TMR1_NEXT3 BCF STATUS,2 。采樣結(jié)果與下限值比較 BTFSS STATUS,2 。否，轉(zhuǎn)采樣結(jié)果轉(zhuǎn)換 BSF PORTD,4 。調(diào)轉(zhuǎn)采樣結(jié)果轉(zhuǎn)換子程序 MOVLW 04H MOVWF SELECT_COUNT 。寫入TMR1寄存器低字節(jié)數(shù) MOVLW TMR1HB MOVWF TMR1H 。中斷返回。清TMR0中斷標(biāo)志位 BCF STATUS,0 DECF SELECT_COUNT,0 MOVWF TEMP 。TEMP寄存器內(nèi)容乘以2，作為查詢顯示數(shù)據(jù) 。將地址偏移量與程序計(jì)數(shù)器值疊加 MOVF LED1 GOTO TMR0_NEXT1 MOVF LED2 GOTO TMR0_NEXT1 MOVF LED3 GOTO TMR0_NEXT1 MOVF LED4TMR0_NEXT1 MOVWF TX_LED 。TEMP寄存器內(nèi)容乘以2，作為查詢顯示數(shù)據(jù) 。將地址偏移量與程序計(jì)數(shù)器值疊加 MOVF SEG1 GOTO TMR0_NEXT2 MOVF SEG2 GOTO TMR0_NEXT2 MOVF SEG3 GOTO TMR0_NEXT2 MOVF SEG4TMR0_NEXT2 MOVWF TX_DATA 。清74LS244使能位，暫時(shí)禁止數(shù)據(jù)輸出顯示 BSF STATUS,5 CLRF SSPSTAT 。沿移位輸出數(shù)據(jù)跳 MOVLW 30H MOVWF SSPCON 。將第一個(gè)待發(fā)送的字節(jié)送緩沖寄存器 CALL SPI_TX 。將第二個(gè)待發(fā)送的字節(jié)送緩沖寄存器 CALL SPI_TX 。通道寄存器減1 MOVWF PORTE 。置74LS244使能位，允許數(shù)據(jù)輸出顯示 DECFSZ SELECT_COUNT,1 。否，轉(zhuǎn)TMR0_NEXT3 MOVLW 04H 。TMR0寄存器賦初值 RETFIE 。******************主程序************************MAIN BSF STATUS,5 MOVLW 01H MOVWF TRISA 。置RC口為輸出方式 MOVWF TRISD 。置RE口為輸出方式。分頻器給TMR0，分頻比1:128，選用系統(tǒng)時(shí)鐘 BCF STATUS,5 MOVLW 0E0H MOVWF INTCON 。請(qǐng)求（TMR1中斷），TM0中斷標(biāo)志位清零 MOVLW TMR0B MOVWF TMR0 。====================TMR1初始化==================== BSF STATUS,5 MOVLW 01H MOVWF PIE1 。TMR1中斷標(biāo)志位清零 MOVLW 30H MOVWF T1CON 。TMR1寄存器低字節(jié)賦初值 MOVLW TMR1HB MOVWF TMR1H 。啟動(dòng)TMR1定時(shí) MOVLW 04H MOVWF SELECT_COUNT 。**************SPI發(fā)送完成查詢子程序****************SPI_TX MOVWF SSPBUF BCF STATUS,6SPI_LOOP BSF STATUS,5 BTFSS SSPSTAT,0 。否，繼續(xù)查詢 BCF STATUS,5 。將緩沖寄存器的數(shù)據(jù)讀出，不管數(shù)據(jù)是否有用 RETURN 。***************數(shù)據(jù)轉(zhuǎn)換子程序****************ADRES_CON。===============LED2賦值====================== MOVF HEIGHT,0 CALL LED2_CON MOVWF LED2。===============LED4賦值====================== MOVF HEIGHT,0 CALL LED4_CON MOVWF LED4。===============SEG2賦值===================== MOVF HEIGHT,0 CALL SEG2_CON MOVWF SEG2。===============SEG4賦值===================== MOVF HEIGHT,0 CALL SEG4_CON MOVWF SEG4 RETURN。===============LED2查表子程序===============LED2_CON ADDWF PCL,1 RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0E1H RETLW 0C3H RETLW 87H RETLW 0FH RETLW 0FH RETLW 0FH RETLW 0FH RETLW 0FH RETLW 0FH RETLW 0FH RETLW 0FH。===============LED4查表子程序================LED4_CON ADDWF PCL,1 RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0F0H RETLW 0E1H RETLW 0C3H RETLW 87H。===============SEG2查表子程序================SEG2_CON ADDWF PCL,1 RETLW 40H RETLW 5BH RETLW 06H RETLW 06H RETLW 00H RETLW 00H RETLW 00H RETLW 00H RETLW 00H RETLW 00H RETLW 00H RETLW 00H RETLW 00H RETLW 06H RETLW 06H RETLW 5BH。===============SEG4查表子程序================SEG4_CON ADDWF PCL,1 RETLW 40H RETLW 3FH RETLW 3FH RETLW 3FH RETLW 3FH RETLW 3FH RETLW 6DH RETLW 3FH RETLW 3FH RETLW 3FH RETLW 6DH RETLW 3FH RETLW 3FH RETLW 3FH RETLW 3FH RETLW 3FH E