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ACK BIT 10H ;应答标志位 SLA DATA 50H ;器件地址字 SUBA DATA 51H ;器件子地址 NUMBYTE DATA 52H ;读/写字节数 SDA BIT P1.5 SCL BIT P1.4 ;I2C总线定义 MTD EQU 30H ;发送数据缓存区首地址(30H-3FH) MRD EQU 40H ;接收数

A51 MACRO ASSEMBLER I2C 08/25/2006 15:57:59 PAGE 1 MACRO ASSEMBLER A51 V8.00 OBJECT MODULE PLACED IN I2C.OBJ ASSEMBLER INVO

;------------------------ Subroutines for I2C ------------------------------ .equ SDA=1 ;SDA conn to pin #1 .equ SCL=0 ;SCL conn to pin #0 .equ PI2C=DDRD ;I2C Bus thrue Port D ;----------

礦ision3 Build Log Project: C:\Documents and Settings\Administrator\桌面\68 I2C\I2C.uv2 Project File Date: 08/24/2006 Output: Build target 'Targe

Build target 'Target 1' linking... Program Size: data=8.0 xdata=0 code=411 creating hex file from "I2C"... "I2C" - 0 Error(s), 0 Warning(s).

### uVision2 Project, (C) Keil Software ### Do not modify ! Target (Target 1), 0x0000 // Tools: 'MCS-51' Group (Source Group 1) File 1,2, 0x0 Options 1,0,0 // Targ

"I2C.obj" TO "I2C.OMF"

ACK BIT 10H ;应答标志位 SLA DATA 50H ;器件地址字 SUBA DATA 51H ;器件子地址 NUMBYTE DATA 52H ;读/写字节数 SDA BIT P1.5 SCL BIT P1.4 ;I2C总线定义 MTD EQU 30H ;发送数据缓存区首地址(30H-3FH) MRD EQU 40H ;接收数

A51 MACRO ASSEMBLER I2C 08/25/2006 15:57:59 PAGE 1 MACRO ASSEMBLER A51 V8.00 OBJECT MODULE PLACED IN I2C.OBJ ASSEMBLER INVO

### uVision2 Project, (C) Keil Software ### Do not modify ! Target (Target 1), 0x0000 // Tools: 'MCS-51' Group (Source Group 1) File 1,2, 0x0 Options 1,0,0 // Targ