📄 pcf8563 的头文件做好了!有需要的来看看啊!呵呵 (ourdev_cn 我们的电子开发社区).mht
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<BR> CLK_SET;&=
nbsp; &n=
bsp; &nb=
sp;=20
=
<BR> SDA_SET;&=
nbsp; &n=
bsp; &nb=
sp; =20
=
<BR> delay_nus=
(2); =20
=
<BR> SDA_CLR;&=
nbsp; &n=
bsp; &nb=
sp; =20
=
<BR> delay_nus=
(2);=20
=
<BR> SDA_SET; =
<BR>}=20
=
<BR>void I2C_Stop (void) &nb=
sp; =20
<BR>{=20
=
<BR> SDA_DI_SET;=20
=
<BR> CLK_DI_SET; &nbs=
p;  =
; =20
=
<BR> SDA_CLR; &=
nbsp; &n=
bsp; =20
=
<BR> CLK_SET; &=
nbsp; =20
=
<BR> delay_nus(2);=20
=
<BR> SDA_SET; &=
nbsp; &n=
bsp; =20
=
<BR> delay_nus(2);=20
<BR>} <BR>unsigned char I2C_Ackn(void) <BR>{=20
=
<BR> unsigned c=
har errtime=3D255;=20
=
<BR> CLK_DI_SET;=20
=
<BR> SDA_DI_CLR;&nbs=
p;  =
; =
=20
=
<BR> delay_nus(2);&n=
bsp; =20
=
<BR> while(CHECK_SDA=
) =20
=
<BR> &nb=
sp;{=20
=
<BR> &nb=
sp; errtime--;=20
=
<BR> &nb=
sp; if (!errtime) &nbs=
p;  =
; =20
=
<BR> &nb=
sp; {=20
=
<BR> &nb=
sp; I2C_Stop()=
;=20
=
<BR> &nb=
sp; &nbs=
p; return 0x00;=20
=
<BR> &nb=
sp; }=20
=
<BR> &nb=
sp; } =20
<BR> CLK_SET; =
=
<BR> delay_nus(2);&n=
bsp;=20
=
<BR> CLK_CLR; &=
nbsp; =20
=
<BR> delay_nus(2);=20
=
<BR> return 0x0=
1;  =
; =
=20
<BR>}=20
=
<BR>void Write_I2C_Byte(unsigned char byte) &nb=
sp; =20
<BR>{=20
=
<BR> unsigned c=
har i;=20
=
<BR> SDA_DI_SET;=20
=
<BR> CLK_DI_SET;&nbs=
p;  =
; =
&=
nbsp; &n=
bsp; =20
=
<BR> for (i&nbs=
p;=3D 0; i < 8; i++) &=
nbsp; &n=
bsp; =20
=
<BR> { &n=
bsp; =20
=
<BR> &nb=
sp; CLK_CLR; &n=
bsp; &nb=
sp; &nbs=
p; =20
=
<BR> &nb=
sp; if((byte & 0x80)) =20
=
<BR> &nb=
sp; {=20
=
<BR> &nb=
sp; &nbs=
p; SDA_SET;=20
=
<BR> &nb=
sp; } &nb=
sp; &nbs=
p; =20
=
<BR> &nb=
sp; else =20
=
<BR> &nb=
sp; &nbs=
p; {=20
=
<BR> &nb=
sp; &nbs=
p; SDA_CLR;=20
=
<BR> &nb=
sp; &nbs=
p;} &nbs=
p;  =
; =20
=
<BR> &nb=
sp; delay_nus(2);=20
=
<BR> &nb=
sp; CLK_SET; &n=
bsp; &nb=
sp; &nbs=
p; =20
=
<BR> &nb=
sp; asm("nop"); =20
=
<BR> &nb=
sp; byte =3D byte <&=
lt; 1; &n=
bsp; &nb=
sp; &nbs=
p; =20
<BR> }=20
=
<BR> CLK_CLR; &=
nbsp; &n=
bsp; &nb=
sp; =20
=
<BR> if (I2C_Ac=
kn()=3D=3D0) delay_nus(5); =
=20
<BR> CLK_CLR; =
<BR>}=20
<BR>unsigned char Read_I2C_Byte(void) =20
<BR>{ =20
=
<BR> unsigned c=
har i,buff =3D 0;=20
=
<BR> delay_nus(2);=20
=
<BR> CLK_DI_SET;;&nb=
sp; &nbs=
p;  =
; =20
=
<BR> SDA_DI_CLR;&nbs=
p;  =
; =
=20
=
<BR> for (i&nbs=
p;=3D 0; i < 8; i++)=20
=
<BR> &nb=
sp; {=20
=
<BR> &nb=
sp; CLK_CLR; &n=
bsp; =20
=
<BR> &nb=
sp; delay_nus(2);=20
=
<BR> &nb=
sp; CLK_SET; &n=
bsp; =20
=
<BR> &nb=
sp; delay_nus(2);=20
=
<BR> &nb=
sp; if ( CHECK_S=
DA) buff++;=20
=
<BR> &nb=
sp; buff =3D (buff&nbs=
p;<< 1);=20
=
<BR> &nb=
sp; delay_nus(2);=20
=
<BR> &nb=
sp; }=20
=
<BR> SDA_DI_SET;=20
=
<BR> CLK_DI_SET;&nbs=
p;  =
; =
=20
<BR> SDA_CLR; =
=
<BR> delay_nus(2);=20
<BR> CLK_SET; =
=
<BR> delay_nus(2);=20
=
<BR> CLK_CLR; &=
nbsp; =20
=
<BR> return buf=
f;  =
; =
=20
<BR>}=20
=
<BR>unsigned char rtc_read(unsigned char address)=20
<BR>{=20
=
<BR> unsigned c=
har d;=20
<BR> I2C_Start();=20
=
<BR> Write_I2C_Byte(0xa2);=
=20
=
<BR> Write_I2C_Byte(addres=
s);=20
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