tlc1543.c

来自「TLC5615的10位AD转换程序,C直接调用汇编」· C语言 代码 · 共 61 行

*/
#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint  unsigned int

//==========AD采样模块============//

//TLC1543 A/D用转换用
sbit CLOCK=P1^3;
sbit D_IN=P1^4;
sbit D_OUT=P1^5;
sbit _CS=P1^6;

//========================新版本=======================
uint read1543(uchar port)	//从TLC1543读取采样值,形参port是采样的通道号
{
uint data ad;
uint data i;
uchar data al=0,ah=0;

CLOCK=0;
_CS=0;
port<<=4;
for (i=0;i<4;i++) //把通道号打入1543
{
	D_IN=(bit)(port&0x80);CLOCK=1;CLOCK=0;
	port<<=1;
}
	
for (i=0;i<6;i++) //填充6个CLOCK
{
CLOCK=1;CLOCK=0;
}

_CS=1;_nop_();_nop_();_CS=0; //等待AD转换

for (i=0;i<2;i++) //取D9,D8
{
	D_OUT=1;
	CLOCK=1;
	ah<<=1;
	if (D_OUT) ah|=0x01;
	CLOCK=0;
}	

for (i=0;i<8;i++) //取D7--D0
{
	D_OUT=1;
	CLOCK=1;
	al<<=1;
	if (D_OUT) al|=0x01;
	CLOCK=0;
}	

_CS=1;

ad=(uint)ah;ad<<=8;ad|=al; //得到AD值
return (ad);
}