初学者，不台明白 AD8344 16位8通道 驱动程序？
#include<stc12C5A60S2.h>
#define uchar unsigned char
#define uint unsigned int
sbit ADS_CS = P2^3;
sbit ADS_DCLK = P2^1;
sbit ADS_DIN = P2^4;
sbit ADS_BUSY = P3^5;
sbit ADS_DOUT = P2^0;
// (MSB) (LSB)
// BIT7 BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 BIT0
// S A2 A1 A0 — SGL/DIF PD1 PD0
void ads_com(uchar ads_comchar)
{
uchar i=0;
for (i=8; i>0; i--)
{
ADS_DIN = ads_comchar&0x80;//取最高位
ADS_DCLK = 0;
ADS_DCLK = 1;
ads_comchar<<=1;//左移数据
}
}
// (MSB) (LSB)
// BIT15 ...... BIT0
uint ads_dat(void)
{
uint ads_datword = 0;
uchar i=0;
for (i=16; i>0; i--)
{
ads_datword<<=1;//左移数据
ADS_DCLK = 0;
if(ADS_DOUT==1) ads_datword = ads_datword|0x01;//最低位或
ADS_DCLK = 1;
}
return(ads_datword);
}
void main()
{
uint ADS_DataWord = 0;
ADS_CS = 1;
ADS_DCLK = 0;
ADS_CS = 0;
// S A2 A1 A0 — SGL/DIF PD1 PD0
// 1 0 0 0 — 1 1 1
ads_com(0x87);//10000111 输入控制命令
ADS_DCLK = 0;
ADS_DCLK = 1;
while(ADS_BUSY == 1);
ADS_DataWord = ads_dat();
ADS_CS = 1;
while(1);
} |
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