[工學(xué)]單片機(jī)技術(shù)基礎(chǔ)課件第七章-資料下載頁
2024-10-16 18:27本頁面
【正文】 ORG 1000H RRRR: MOV TMOD , 20H MOV TH1 , 0E8H MOV TL1 , 0E8H SETB TR1 MOV SCON , 50H MOV 87H, 00H ENTER: MOV DPH , 10H MOV DPL , 00H MOV R5 , 00H RX1: JBC RI , IF_04H SJMP RX1 IF_04H: MOV A , SBUF CJNE A , 04H , TX_FFH MOV A , 00H MOV SBUF , A WAIT1: JBC TI , RX2 SJMP WAIT1 LJMP RX2 TX_FFH: MOV A , 0FFH MOV SBUF , A WAIT2: JBC TI , LL1 SJMP WAIT2 LL1: LJMP ENTER RX2: JBC RI , LL2 SJMP RX2 LL2: MOV A , SBUF MOV R4 , A MOV R5 , A RX3: JBC RI , LL3 SJMP RX3 LL3: MOV A , SBUF MOVX @DPTR , A INC DPTR ADD A , R5 MOV R5 , A DJNZ R4 , RX3 RX4: JBC RI , LL4 SJMP RX4 LL4: MOV A , SBUF MOV 30H , R5 CJNE A, 30H , T_ERR T_RIGHT:MOV A , 11H MOV SBUF , A WAIT3: JBC TI , EN SJMP WAIT3 T_ERR: MOV A , 0F0H MOV SBUF , A WAIT4: JBC TI , AGAIN SJMP WAIT4 AGAIN: LJMP ENTER EN: RET
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