main.c

51单片机及其C语言程序开发实例第8章节

#include<reg51.h>
#include"AD977.h"

int Data[] = {0,0,0,0}; //存放采样数据

void InitIO()
{
	PinPWRD  = 0;
	PinBUSY  = 1;
	PinRC    = 0;
	PinDATA  = 1;
	PinSCLK  = 0;
	PinSYN   = 1;
	PinSBTC  = 0;
	PinEXINT = 0;
	}

//为了检验AD采集的正确性，将采集的数据通过串口传送到PC以检查
//UART初始化：模式1，8位，9600Bds at 11.059MHz
void InitSerial()
{	
	SCON = 0x50;					  	 // uart in mode 1 (8 bit), REN=1
	TMOD = TMOD | 0x20 ;       			 // Timer 1 in mode 2 
	TH1  = 0xFD;                		 // 9600 Bds at 11.059MHz 
	TL1  = 0xFD; 				  	     // 9600 Bds at 11.059MHz
	TR1  = 1; 						     // Timer 1 run
	}
	
void main()
{
	uint CNT,i;
	InitIO();
	InitSerial();
	while(1)
	{
		for(CNT=0;CNT<4;CNT++)		//依次采用5种模式采集
		{
			Data[CNT] = nSample(CNT,BTC);
			}
		for(i=0;i<4;i++)        	//通过串口将将数据传送
		{
			TI = 0;
			SBUF = (Data[i] >> 8) & 0xff;
			while(!TI);
			TI = 0;
			SBUF = Data[i] & 0xff;
			while(!TI);
			}
		LongDelay(50);
		}
	}