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JSR F_StartMOV #10100000B ;硬件地址+写STR R_Temp0JSR F_Send8Bit;应答位JSR F_Wait_AskLJNC L_MainPress1Key ;应答失败，重新写地址MOV #000H ; 选择00H写数据STR R_Temp0JSR F_Send8Bit;应答位JSR F_Wait_AskLJNC L_MainPress1Key ;应答失败，重新写地址MOV #01010101B ; 把FE写入00HSTR R_Temp0JSR F_Send8Bit;应答位JSR F_Wait_AskLJNC L_MainPress1Key ;应答失败，重新写地址JSR F_SCL_OutLowNOPNOPJSR F_StopNOPNOP ;写数据完成L_MainPress1Key1: JSR F_StartMOV #10100000B ;硬件地址+写STR R_Temp0JSR F_Send8BitJSR F_Wait_AskLJNC L_MainPress1Key ;应答失败，重新写地址MOV #000H ; 选择00H读数据STR R_Temp0JSR F_Send8Bit;应答位JSR F_Wait_AskLJNC L_MainPress1Key1 ;应答失败，重新写地址JSR F_StartMOV #10100001B ;硬件地址+读STR R_Temp0JSR F_Send8BitJSR F_Wait_AskLJNC L_MainPress1Key1 ;应答失败，重新写地址NOPJSR F_SCL_OutLowNOPNOPJSR F_SDA_OutHightNOPNOPJSR F_SDA_InPutHightJSR F_ReadBeatMOV R_Temp2 NOPJSR F_SCL_OutLow ;给EEprom发送非应答，结束通讯NOPNOPNOPNOPJSR F_SDA_OutHightNOPNOPNOPNOPJSR F_SCL_OutHightNOPNOPNOPNOPJSR F_SCL_OutLowNOPNOPNOPNOPJSR F_SDA_OutLowNOPNOPNOPNOPJSR F_StopMOV R_Temp2NOPJSR F_SCL_OutLowF_ReadBeat: JSR F_SDA_InPutHightMOV #08STR R_Temp0MOV #00HSTR R_Temp2
L_LOOOP8: JSR F_SDA_InPutHightNOPNOPJSR F_SCL_OutHightNOPNOPMOV P_P0_DAT EOR #FFHAND #00001000BLJNZ L_IS0
L_IS1: JSR F_SCL_OutLowNOPNOPSET STATUS,C RCLR R_Temp2JMP L_CHECKBITL_IS0: JSR F_SCL_OutLowNOPNOP CLR STATUS,C RCLR R_Temp2
L_CHECKBIT:MOV R_Temp2DECR R_Temp0LJNZ L_LOOOP8RTSF_Stop: JSR F_SCL_OutHightNOPNOPNOPNOPJSR F_SDA_OutHightNOPNOPNOPNOPRTSF_Wait_Ask: JSR F_SCL_OutHightNOPNOPJSR F_SDA_InPutHight;JSR F_ScanKeyPortInitJSR F_ScanDelay MOV P_P0_DAT EOR #FFHAND #00001000BLJZ L_Fail
L_AskSucc:JSR F_SDA_OutLowJSR F_SCL_OutLowNOPNOP SET STATUS,C RTS
L_Fail: CLR STATUS,C RTS F_Start:JSR F_SDA_OutHightJSR F_SCL_OutHightNOPNOP JSR F_SDA_OutLowNOPNOPRTS F_Send8Bit:MOV #8STR R_Temp1; MOV R_Temp0L_LOOP8: RCLR R_Temp0LJC L_Send1
L_Send0: JSR F_SCL_OutLowNOPNOPJSR F_SDA_OutLowNOPNOPJSR F_SCL_OutHightNOPNOPNOPNOPJMP L_DEC_R_Temp1L_Send1: JSR F_SCL_OutLowNOPNOPJSR F_SDA_OutHightNOPNOPJSR F_SCL_OutHightNOPNOPNOPNOP
L_DEC_R_Temp1:DECR R_Temp1LJNZ L_LOOP8NOPNOPNOPNOPNOPJSR F_SCL_OutLowNOPNOPNOPNOPNOPNOPNOPNOPNOPNOPRTS
F_SDA_InPutHight: ;CWDT //清看门狗 默认18ms溢出复位 MOV #00001000BSTC P0CR ;1=输入口 有效：BIT 3-0MOV Port0ORA #00001000BSTR Port0 ;P0寄存器 有效：BIT 3-0MOV #11110111BSTR PU2_0 ;0=上拉 有效：BIT 5-0RTS F_SCL_OutLow: CWDT MOV Port0AND #11111011BSTR Port0 ;P0寄存器 有效：BIT 3-0; //清看门狗 默认18ms溢出复位 MOV #0STC P0CR ;1=输入口 有效：BIT 3-0MOV #FFHSTR PU2_0 ;0=上拉 有效：BIT 5-0RTS F_SDA_OutLow: CWDT MOV Port0AND #11110111BSTR Port0 ;P0寄存器 有效：BIT 3-0 //清看门狗 默认18ms溢出复位 MOV #0STC P0CR ;1=输入口 有效：BIT 3-0MOV #FFHSTR PU2_0 ;0=上拉 有效：BIT 5-0RTS F_SDA_OutHight: CWDT MOV Port0ORA #00001000BSTR Port0 ;P0寄存器 有效：BIT 3-0 //清看门狗 默认18ms溢出复位 MOV #0STC P0CR ;1=输入口 有效：BIT 3-0MOV #FFHSTR PU2_0 ;0=上拉 有效：BIT 5-0RTS F_SCL_OutHight: CWDT MOV Port0ORA #00000100BSTR Port0 ;P0寄存器 有效：BIT 3-0 //清看门狗 默认18ms溢出复位 MOV #0STC P0CR ;1=输入口 有效：BIT 3-0MOV #FFHSTR PU2_0 ;0=上拉 有效：BIT 5-0RTS 这篇关于读写24c02里面的数据（IIC通讯）的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
