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📄 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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Date: Sat, 12 Jan 2008 22:27:45 +0800
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rowSpan=3D2>=A1=BE=C2=A5=D6=F7=CE=BB=A1=BF <FONT=20
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    vAlign=3Dtop width=3D"81%" bgColor=3D#d1d9e2><FONT=20
      color=3D#000000>/*******************************************/=20
      =
<BR>/*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;=D3=B2=BC=FEI2C=D7=DC=CF=DF=D1=DD=CA=BE=B3=CC=D0=F2&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/=20
      =
<BR>/*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2007=C4=EA11=D4=C212=C8=D5&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/=20
      =
<BR>/*&nbsp;&nbsp;&nbsp;=C4=BF=B1=EAMCU:MEGA64&nbsp;&nbsp;&nbsp;=BE=A7=D5=
=F1:20MHZ&nbsp;*/=20
      <BR>/*******************************************/=20
      <BR>#include&nbsp;&lt;ioavr.h&gt; <BR>#include"TWI6.H"=20
      <BR>#include&nbsp;"void_main.h" =
<BR>#define&nbsp;rd_device_add&nbsp;0xa1=20
      <BR>#define&nbsp;wr_device_add&nbsp;0xa0=20
      =
<BR>//extern&nbsp;const&nbsp;unsigned&nbsp;char&nbsp;seg_table[16];=20
      <BR>//extern&nbsp;unsigned&nbsp;char&nbsp;led_buff[4];=20
      <BR>//extern&nbsp;void&nbsp;delay_ms(unsigned&nbsp;int&nbsp;time); =

      <BR>//extern&nbsp;void&nbsp;display(void);=20
      <BR>/******************************************=20
      =
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;I2C=D7=DC=CF=DF=D0=B4=D2=BB=B8=F6=D7=D6=BD=DA=20
      =
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;=B7=B5=BB=D80:=D0=B4=B3=C9=B9=A6=20
      =
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=B7=B5=BB=D8=B7=C70:=D0=
=B4=CA=A7=B0=DC=20
      <BR>*******************************************/=20
      =
<BR>unsigned&nbsp;char&nbsp;wr_ram(unsigned&nbsp;char&nbsp;address,&nbsp;=
unsigned&nbsp;char&nbsp;&nbsp;num,&nbsp;unsigned&nbsp;char&nbsp;*ppc)=20
      =
<BR>//unsigned&nbsp;char&nbsp;i2c_Write(unsigned&nbsp;char&nbsp;*Wdata,un=
signed&nbsp;char&nbsp;RomAddress&nbsp;,unsigned&nbsp;char&nbsp;twx)=20
      =
<BR>{&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;char&nbsp;i;=20
      =
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Start();/=
/I2C=C6=F4=B6=AF=20
      =
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Wait();=20
      =
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(TestAc=
k()!=3DSTART)&nbsp;return&nbsp;1;//ACK=20
      =
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Write8Bit=

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