📄 twi读写时钟芯片pcf8583范例 (ourdev_cn 我们的电子开发社区).mht
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color=3D#000000>45</FONT><BR>=C5=C9=B1=F0=A3=BA<FONT=20
color=3D#000000></FONT><BR>=B5=C8=BC=B6=A3=BA<FONT =
color=3D#000000>------</FONT><BR>=C0=B4=D7=D4=A3=BA<FONT=20
color=3D#000000>=C9=CF=BA=A3 </FONT><BR></TD>
<TD class=3Df03=20
style=3D"BORDER-RIGHT: #bbbbbb 0.5pt solid; BORDER-TOP: medium none; =
BORDER-LEFT: medium none; BORDER-BOTTOM: medium none"=20
vAlign=3Dtop width=3D"81%" bgColor=3D#e8e8e8><FONT=20
=
color=3D#000000>/* Copyright (c) 2002, Marek Mic=
halkiewicz=20
<BR> All rights reserved.=20
=
<BR><BR> Redistribution and use in s=
ource and binary forms, with or without=20
=
<BR> modification, are permitted provided=
that the following conditions are met:=20
=
<BR><BR> * Redistributions of source =
;code must retain the above copyright=20
=
<BR> notice, this list of&nbs=
p;conditions and the following disclaimer.=20
=
<BR> * Redistributions in binary for=
m must reproduce the above copyright=20
=
<BR> notice, this list of&nbs=
p;conditions and the following disclaimer in=20
=
<BR> the documentation and/or =
;other materials provided with the=20
<BR> distribution.=20
=
<BR><BR> THIS SOFTWARE IS PROVIDED BY =
;THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS =
;IS"=20
=
<BR> AND ANY EXPRESS OR IMPLIED WARRA=
NTIES, INCLUDING, BUT NOT LIMITED TO, THE=20
=
<BR> IMPLIED WARRANTIES OF MERCHANTABILITY =
;AND FITNESS FOR A PARTICULAR PURPOSE=20
=
<BR> ARE DISCLAIMED. IN NO EVENT SHAL=
L THE COPYRIGHT OWNER OR CONTRIBUTORS BE=20
=
<BR> LIABLE FOR ANY DIRECT, INDIRECT, =
;INCIDENTAL, SPECIAL, EXEMPLARY, OR=20
=
<BR> CONSEQUENTIAL DAMAGES (INCLUDING, BUT =
;NOT LIMITED TO, PROCUREMENT OF=20
=
<BR> SUBSTITUTE GOODS OR SERVICES; LOSS&nb=
sp;OF USE, DATA, OR PROFITS; OR BUSINESS=20
=
<BR> INTERRUPTION) HOWEVER CAUSED AND ON&n=
bsp;ANY THEORY OF LIABILITY, WHETHER IN=20
=
<BR> CONTRACT, STRICT LIABILITY, OR TORT&n=
bsp;(INCLUDING NEGLIGENCE OR OTHERWISE)=20
=
<BR> ARISING IN ANY WAY OUT OF T=
HE USE OF THIS SOFTWARE, EVEN IF ADVIS=
ED OF THE=20
<BR> POSSIBILITY OF SUCH DAMAGE. */ =
=
<BR><BR>/* $Id: twi.h,v 1.3 2002/12/18 13:24:50&=
nbsp;joerg_wunsch Exp $ */=20
<BR><BR>/*=20
=
<BR> avr/twi.h - definitions for TWI=
: Two-Wire Interface or Twi Was I2c(tm).=20
<BR><BR> Contributors:=20
=
<BR> Created by Marek Michalk=
iewicz <marekm@linux.org.pl>=20
=
<BR><BR> Based on advance information&nbs=
p;Atmel datasheet Rev. 1142A-10/00 (ATmega163).=20
<BR> */ <BR><BR>#ifndef _AVR_TWI_H_=20
<BR>#define _AVR_TWI_H_ 1=20
<BR><BR>#define rd_device_add 0xa1=20
<BR>#define wr_device_add 0xa0=20
<BR>/* TWSR values (not bits) */=20
=
<BR>/* Master=D6=F7=BB=FA=B7=A2=CB=CD=C4=A3=CA=BD=B5=C4=D7=B4=CC=AC=C2=
=EB */=20
=
<BR>#define START &nb=
sp; 0x08//START =D2=D1=B7=A2=
=CB=CD=20
=
<BR>#define REP_START  =
; 0x10//=D6=D8=B8=B4START&=
nbsp;=D2=D1=B7=A2=CB=CD=20
<BR>/* Master Transmitter */=20
=
<BR>#define MT_SLA_ACK &nbs=
p; 0x18//SLA+W=
=D2=D1=B7=A2=CB=CD=A3=BB=BD=D3=CA=D5=B5=BDACK=20
=
<BR><BR>#define MT_SLA_NACK  =
; 0x20//SLA+W =D2=
=D1=B7=A2=CB=CD=BD=D3=CA=D5=B5=BDNOT ACK=20
=
<BR>#define MT_DATA_ACK &nb=
sp; 0x28//=CA=FD=BE=DD=D2=D1=
=B7=A2=CB=CD=BD=D3=CA=D5=B5=BDACK=20
=
<BR>#define MT_DATA_NACK &n=
bsp; 0x30//=CA=FD=BE=DD=D2=
=D1=B7=A2=CB=CD=BD=D3=CA=D5=B5=BDNOT ACK=20
=
<BR><BR>/* Master Receiver=D6=F7=BB=FA=BD=D3=CA=D5=C4=A3=CA=BD=B5=
=C4=D7=B4=CC=AC=C2=EB */=20
=
<BR>#define MR_ARB_LOST &nb=
sp; 0x38//SLA+W =BB=F2=
=CA=FD=BE=DD=B5=C4=D6=D9=B2=C3=CA=A7=B0=DC=20
=
<BR>#define MR_SLA_ACK &nbs=
p; 0x40//SLA+R =D2=D1=
=B7=A2=CB=CD=BD=D3=CA=D5=B5=BDACK=20
=
<BR>#define MR_SLA_NACK &nb=
sp; 0x48//SLA+R =D2=D1=
=B7=A2=CB=CD=BD=D3=CA=D5=B5=BDNOT ACK=20
=
<BR>#define MR_DATA_ACK &nb=
sp; 0x50//=BD=D3=CA=D5=B5=BD=
=CA=FD=BE=DDACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define MR_DATA_NACK &n=
bsp; 0x58//=BD=D3=CA=D5=B5=
=BD=CA=FD=BE=DDNOT ACK =D2=D1=B7=B5=BB=D8=20
<BR>/* Slave Receiver */=20
=
<BR>#define SR_SLA_ACK &nbs=
p; 0x60//=D7=D4=BC=BA=B5=C4=
SLA+W =D2=D1=BE=AD=B1=BB=BD=D3=CA=D5ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define SR_ARB_LOST_SLA_ACK &=
nbsp; 0x68//SLA+R/W =D7=F7=CE=AA=D6=F7=BB=FA=B5=C4=D6=D9=B2=C3=CA=
=A7=B0=DC=A3=BB=D7=D4=BC=BA=B5=C4SLA+W =D2=D1=BE=AD=B1=BB=BD=D3=CA=D5=
ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define SR_GCALL_ACK &n=
bsp; 0x70//=BD=D3=CA=D5=B5=
=BD=B9=E3=B2=A5=B5=D8=D6=B7ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define SR_ARB_LOST_GCALL_ACK 0x78//SLA+R/W =D7=F7=CE=AA=
=D6=F7=BB=FA=B5=C4=D6=D9=B2=C3=CA=A7=B0=DC=A3=BB=BD=D3=CA=D5=B5=BD=B9=E3=B2=
=A5=B5=D8=D6=B7ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define SR_DATA_ACK &nb=
sp; 0x80//=D2=D4=C7=B0=D2=D4=
=D7=D4=BC=BA=B5=C4 SLA+W =B1=BB=D1=B0=D6=B7=A3=BB=CA=FD=BE=DD=D2=
=D1=BE=AD=B1=BB=BD=D3=CA=D5ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define SR_DATA_NACK &n=
bsp; 0x88//=D2=D4=C7=B0=D2=
=D4=D7=D4=BC=BA=B5=C4 SLA+W =B1=BB=D1=B0=D6=B7=A3=BB=CA=FD=BE=DD=
=D2=D1=BE=AD=B1=BB=BD=D3=CA=D5NOT ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define SR_GCALL_DATA_ACK &nb=
sp; 0x90//=D2=D4=C7=B0=D2=D4=B9=E3=B2=A5=B7=BD=CA=BD=B1=BB=D1=B0=D6=B7=
=A3=BB=CA=FD=BE=DD=D2=D1=BE=AD=B1=BB=BD=D3=CA=D5ACK =D2=D1=B7=B5=BB=D8=
=20
=
<BR>#define SR_GCALL_DATA_NACK &n=
bsp; 0x98//=D2=D4=C7=B0=D2=D4=B9=E3=B2=A5=B7=BD=CA=BD=B1=BB=D1=B0=D6=
=B7=A3=BB=CA=FD=BE=DD=D2=D1=BE=AD=B1=BB=BD=D3=CA=D5NOT ACK =D2=D1=
=B7=B5=BB=D8=20
=
<BR>#define SR_STOP &=
nbsp; &n=
bsp; 0xA0//=D4=DA=D2=D4=B4=D3=BB=FA=B9=A4=D7=F7=CA=B1=BD=
=D3=CA=D5=B5=BDSTOP=BB=F2=D6=D8=B8=B4START=20
<BR>/* Slave Transmitter */=20
=
<BR>#define ST_SLA_ACK &nbs=
p; 0xA8//=D7=D4=BC=BA=B5=C4=
SLA+R =D2=D1=BE=AD=B1=BB=BD=D3=CA=D5ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define ST_ARB_LOST_SLA_ACK &=
nbsp; 0xB0//SLA+R/W =D7=F7=CE=AA=D6=F7=BB=FA=B5=C4=D6=D9=B2=C3=CA=
=A7=B0=DC=A3=BB=D7=D4=BC=BA=B5=C4SLA+R =D2=D1=BE=AD=B1=BB=BD=D3=CA=D5=
ACK =D2=D1=B7=B5=BB=D8=20
=
<BR>#define ST_DATA_ACK &nb=
sp; 0xB8//TWDR =C0=EF=
=CA=FD=BE=DD=D2=D1=BE=AD=B7=A2=CB=CD=BD=D3=CA=D5=B5=BDACK=20
=
<BR>#define ST_DATA_NACK &n=
bsp; 0xC0//TWDR =C0=EF=
=CA=FD=BE=DD=D2=D1=BE=AD=B7=A2=CB=CD=BD=D3=CA=D5=B5=BDNOT ACK=20
=
<BR>#define ST_LAST_DATA &n=
bsp; 0xC8//TWDR =B5=C4=
=D2=BB=D7=D6=BD=DA=CA=FD=BE=DD=D2=D1=BE=AD=B7=A2=CB=CD(TWAE =3D =
;=A1=B00=A1=B1);=BD=D3=CA=D5=B5=BDACK=20
<BR>/* Misc */=20
=
<BR>#define NO_INFO &=
nbsp; 0xF8//=C3=BB=D3=D0=CF=E0=B9=
=D8=B5=C4=D7=B4=CC=AC=D0=C5=CF=A2=A3=BBTWINT =3D =A1=B00=A1=B1 =
=
<BR>#define BUS_ERROR  =
; 0x00//=D3=C9=D3=DA=B7=C7=
=B7=A8=B5=C4START =BB=F2STOP =D2=FD=C6=F0=B5=C4=D7=DC=CF=DF=B4=ED=
=CE=F3=20
<BR>/*=20
=
<BR> * The lower 3 bits of TWSR a=
re reserved on the ATmega163.=20
=
<BR> * The 2 LSB carry the prescaler&n=
bsp;bits on the newer ATmegas.=20
<BR> */=20
=
<BR>#define STATUS_MASK &nb=
sp; 0xf8=20
=
<BR> &nb=
sp; &nbs=
p; =20
=
<BR>#define STATUS &n=
bsp; (TWSR & STATU=
S_MASK)=20
<BR><BR>/*=20
=
<BR> * R/~W bit in SLA+R/W address fie=
ld.=20
<BR> */=20
=
<BR>#define READ &nbs=
p; 1=20
=
<BR>#define WRITE 0=20
<BR><BR>#endif /* _AVR_TWI_H_ */ =
<BR><BR>//TWI=D7=B4=CC=AC=B6=A8=D2=E5=20
=
<BR>//MT =D6=F7=B7=BD=CA=BD=B4=AB=CA=E4 MR =D6=F7=B7=
=BD=CA=BD=BD=D3=CA=D5=20
<BR><BR>#define START 0x08 =
<BR>#define RE_START 0x10=20
<BR>#define MT_SLA_ACK 0x18=20
<BR>#define MT_SLA_NOACK 0x20=20
<BR>#define MT_DATA_ACK 0x28=20
<BR>#define MT_DATA_NOACK 0x30=20
<BR>#define MR_SLA_ACK 0x40=20
<BR>#define MR_SLA_NOACK 0x48=20
<BR>#define MR_DATA_ACK 0x50=20
<BR>#define MR_DATA_NOACK 0x58/**/ =
<BR>//=B3=A3=D3=C3TWI=B2=D9=D7=F7(=D6=F7=C4=A3=CA=BD=D0=B4=BA=CD=D6=F7=C4=
=A3=CA=BD=B6=C1)=20
=
<BR>#define Start() &=
nbsp; TWCR =3D(1<<TWINT)|(1<&l=
t;TWSTA)|(1<<TWEN)=20
=
<BR>#define Re_Start() &nbs=
p; TWCR =3D(1<<TWINT)|(1<<TWSTA)|(1<<TWEN)=20
=
<BR>#define Wait() &n=
bsp; &nb=
sp;while(!(TWCR&(1<<TWINT)))=20
=
<BR>#define TestAck()  =
; TWSR&0xf8=20
=
<BR>#define SetAck() =
TWCR=3D1<<TWEA=20
=
<BR>#define Set_No_Ack() &n=
bsp; TWCR&=3D~(1<<TWEA)=20
=
<BR>#define Twi() &nb=
sp; (TWC=
R=3D(1<<TWINT)|(1<<TWEN)|(1<<TWEA))=20
=
<BR><BR>#define SetNoAck() TWCR&=3D~(1<=
;<TWEA)=20
=
<BR>#define Write8Bit(x) {TWDR=3D(x);TWCR=3D(1<<TWI=
NT)|(1<<TWEN);}=20
=
<BR>#define Stop() &n=
bsp; TWCR =3D (1<<TWIN=
T)|(1<<TWEN)|(1<<TWSTO)=20
=
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