液位計(jì)算機(jī)控制系統(tǒng)設(shè)計(jì)方案-資料下載頁(yè)
2025-04-26 07:13本頁(yè)面
【正文】 通，關(guān)閉所有顯示 RET。************* 8位共陽(yáng)數(shù)碼管字型表 *****************SGTB: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H DB 88H,83H,0C6H,0A1H,86H,8EH,89H,0A3H,8CH,0C8HSgTB1: DB 24H,7DH,0E0H,70H,39H,32H,22H,7CH,20H,30H,28H,23H,0A6H,61H,0A2H,0AAH 。===========串行數(shù)據(jù)輸出DOUT: CLR DA_CLK CLR DA_DIN CLR 。tlc1543芯片端口清零 SETB DA_CS 。CS=1 NOP CLR DA_CS 。CS=0 。輸出R2的低2位，就是10位數(shù)據(jù)的高2位 MOV A,R2 。轉(zhuǎn)換電壓 MOV C, MOV DA_DIN,C NOP SETB DA_CLk NOP CLR DA_CLk MOV C, MOV DA_DIN,C NOP SETB DA_CLk NOP CLR DA_CLk 。=========輸出R1 MOV A,R1 MOV B,08HAD_02: RLC A MOV DA_DIN,C NOP SETB DA_CLk NOP CLR DA_CLk DJNZ B,AD_02 。=========輸出任意2位 MOV A,00H MOV B,02HAD_03: RLC A MOV DA_DIN,C NOP SETB DA_CLk NOP CLR DA_CLk DJNZ B,AD_03 NOP CLR DA_CS 。CS=1 RET。=======AD轉(zhuǎn)換子程序================AD: MOV AD_H,70H CLR AD_CLk 。CLk引腳底 JNB AD_EOC,$ 。轉(zhuǎn)換未完等待 MOV A,0 MOV RS_H,A 。 MOV RS_L,A 。============== 。選中TLC143 SETB AD_CS 。CS=1 NOP CLR AD_CS 。CS=0 MOV R0,2 。取回轉(zhuǎn)換結(jié)果高2位 D9D8AD_21: MOV A,RS_H MOV C,AD_DOUT RLC A MOV RS_H,A MOV A,AD_H 。地址信號(hào) RLC A MOV AD_DIN,C MOV AD_H,A SETB AD_CLk NOP NOP CPL AD_CLk DJNZ R0,AD_21 MOV R0,2 。取回轉(zhuǎn)換結(jié)果D7 D6AD_22: MOV A,RS_L MOV C,AD_DOUT RLC A MOV RS_L,A MOV A,AD_H RLC A MOV AD_DIN,C MOV AD_H,A SETB AD_CLk NOP NOP CPL AD_CLk DJNZ R0,AD_22 MOV R0,6 。取回轉(zhuǎn)換結(jié)果 D5 D4 D3 D2 D1 D0AD_3: MOV A,RS_L MOV C,AD_DOUT RLC A MOV RS_L,A SETB AD_CLk NOP NOP CPL AD_CLk DJNZ R0,AD_3 NOP SETB AD_CS 。CS=1 。============= JNB AD_EOC,$ RETDELAY: MOV R7,0FFH 。延遲時(shí)間D1: NOP NOP NOP NOP NOP NOP NOP NOP NOP DJNZ R7,D1 RET END 18
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