?? tlc1543_driver.c
字號:
#include <intrins.h>
#define ch0 0 //AD通道號
#define ch1 1
#define ch2 2
#define ch3 3
#define ch4 4
#define ch5 5
#define ch6 6
#define ch7 7
unsigned int Res;
//TLC1543 A/D用轉換用
sbit CLOCK =P2^4;
sbit D_IN =P2^7;
sbit D_OUT =P2^5;
sbit _CS =P2^6;
void DelayMS(unsigned int i)
{
unsigned int j,k;
for(k=0;k<i;k++)
for(j=0;j<60;j++);
}
unsigned int read1543(unsigned char port) //從TLC1543讀取采樣值,形參port是采樣的通道號
{
unsigned int data ad;
unsigned char data i,al=0,ah=0;
CLOCK=0;
_CS=0;
port<<=4;
for (i=0;i<4;i++) //把通道號打入1543
{
D_IN=(bit)(port&0x80);CLOCK=1;CLOCK=0;
port<<=1;
}
for (i=0;i<6;i++) //填充6個CLOCK
{
CLOCK=1;CLOCK=0;
}
_CS=1;
_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();
_CS=0; //等待AD轉換
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=(unsigned int)ah;ad<<=8;ad|=al; //得到AD值
return (ad);
}
unsigned int ReadADC(unsigned char channel)
{
unsigned int ADValue[5],temp;
char n,i,j,min;
for (n=0;n<5;n++) //15次采樣
{
ADValue[n]=read1543(channel)&0x03FF;
}
n=5; //排序
for (i=0;i<n-1;i++)
{ min=i;
for (j=i+1;j<n;j++)
if(ADValue[min]>ADValue[j])min=j;
temp=ADValue[i];
ADValue[i]=ADValue[min];
ADValue[min]=temp;
}
//對中間5個值求和
return ADValue[2];
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -