stc12c5a60s AD转换获取土壤的湿度

AD转换获取土壤的湿度

#include "reg52.h"
#include "intrins.h"

#define MYID 0x05
#define UPID 0x01

sfr AUXR = 0x8e;

sfr ADC_CONTR = 0xBC;
sfr ADC_RES = 0xBD;
sfr ADC_LOW2 = 0xBE;
sfr P1ASF = 0x9D;

#define ADC_POWER 0x80
#define ADC_FLAG 0x10
#define ADC_START 0x08
#define ADC_SPEEDLL 0x00
#define ADC_SPEEDL 0x20
#define ADC_SPEEDH 0x40
#define ADC_SPEEDHH 0x60

unsigned char bufsend[10] = { 0 };

void Delay1ms(unsigned int x)		//@11.0592MHz
{
	unsigned char i, j;

	while( x -- ){
		_nop_();
		_nop_();
		_nop_();
		i = 11;
		j = 190;
		do
		{
			while (--j);
		} while (--i);
	}
}

void UartInit() // 9600 @11.0592
{
	PCON |= 0x80;
	SCON = 0x50;
	AUXR &= 0xBF;
	AUXR &= 0xFE;
	TMOD &= 0x0F;
	TMOD |= 0x20;
	TL1 = 0XFA;
	TH1 = 0xFA;
	ET1 = 0;
	TR1 = 1;
}

void InitADC(){
	P1ASF = 0x01;
	ADC_RES = 0;
	ADC_CONTR = ADC_POWER | ADC_SPEEDLL;
	Delay1ms(2);
}

unsigned char GetADCResult(unsigned char ch){
	ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START;
	_nop_();
	_nop_();
	_nop_();
	_nop_();
	while( ! (ADC_CONTR & ADC_FLAG) );
	ADC_CONTR &= ~ADC_FLAG;
	return ADC_RES;
}

unsigned char DataSendPreprocess()
{
	unsigned char i, t = 0;
	bufsend[0] = 0x7f; //起始字节
	bufsend[1] = UPID; //接受者地址
	bufsend[2] = MYID; //发送者地址
	bufsend[3] = 3;	   //数据长度
	bufsend[4] = 0x13; //传感器类型0x13---->土壤湿度
	bufsend[5] = 0; //数据高字节
	bufsend[6] = ( 255 - GetADCResult(0) )* 100 / 255 ; //AD通道号0转换后的数据
	for(i = 1; i <7; i ++ )
	{
		t ^= bufsend[i];	
	}
	bufsend[7] = t; //异或校验码生成
	bufsend[8] = 0xff;  //结束字节

	return 9;
}

void DataSend(unsigned char ss[], unsigned char len)
{
	unsigned char i;
	for( i = 0; i < len; i ++ ){
		SBUF = ss[i];
		while( TI == 0 );
		TI = 0;	
	}
}

void main()
{
	unsigned char len;
	InitADC();
	UartInit();


	while(1)
	{
		len = DataSendPreprocess();
		DataSend(bufsend, len);
		Delay1ms(1000);
	}
}
			  

来源：CSDN

作者：_Hello Spring

链接：https://blog.csdn.net/wct3344142/article/details/103804480