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#include<MSP430G2553.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include "OLED.h"
#define uchar unsigned char
#define uint unsigned int
#define DS18B20_IO_IN P2DIR &= ~BIT0
#define DS18B20_IO_OUT P2DIR |= BIT0
#define DS18B20_DQ_H P2OUT |= BIT0
#define DS18B20_DQ_L P2OUT &= ~BIT0
#define DS18B20_DQ_IN (P2IN & BIT0)
float TEMP_Result;
float ADC10_Result=0;
//復位DS18B20
void DS18B20_Rst(void)
{
DS18B20_IO_OUT;
DS18B20_DQ_L;
_delay_cycles(600);
DS18B20_DQ_H;
DS18B20_IO_IN;
while(DS18B20_DQ_IN);
while(!DS18B20_DQ_IN);
}
//寫一個字節到DS18B20
//dat：要寫入的字節
void DS18B20_Write_Byte(uchar dat)
{
uchar j;
DS18B20_IO_OUT;
for (j=1;j<=8;j++)
{
DS18B20_DQ_L;
_delay_cycles(8);
if(dat&0x01)
{DS18B20_DQ_H;}
else
{DS18B20_DQ_L;}
_delay_cycles(80);
DS18B20_DQ_H;
dat>>=1;
}
}
//從DS18B20讀一個字節
uchar DS18B20_Read_Byte()
{
uchar i=0;
uchar dat=0;
for(i=0;i<8;i++)
{
dat>>=1;
DS18B20_IO_OUT;
DS18B20_DQ_L;
_delay_cycles(1);
DS18B20_DQ_L;
DS18B20_IO_IN;
_delay_cycles(12);
if(DS18B20_DQ_IN)
dat|=0x80;
_delay_cycles(55);
}
return(dat);
}
//開始溫度轉換
void DS18B20_Start(void)
{
DS18B20_Rst();
DS18B20_Write_Byte(0xCC);
DS18B20_Write_Byte(0x44);
}
//從ds18b20得到溫度值
//精度：0.1C
//返回值：溫度值（-550~1250）
float DS18B20_Get_Temp(void)
{
uchar TL,TH;
uint t=0;
float tt=0;
DS18B20_Start ();
DS18B20_Rst();
DS18B20_Write_Byte(0xCC);
DS18B20_Write_Byte(0xBE);
TL=DS18B20_Read_Byte();
TH=DS18B20_Read_Byte();
t=TH;
t<<=8;
t|=TL;
tt=((float)(0.0625*(t&0x0f))+(t>>4)*1.000);
tt=tt*10+0.5;
tt=tt/10;
return tt;
}
void PMW_OUT_Init () //PWM 輸出初始化
{
P3DIR |= BIT5;
P3SEL |= BIT5;
TA0CTL |= TASSEL_1+TACLR+MC_1;
TA0CCTL1 |= OUTMOD_7; //選擇高電平模式的 PWM 輸出
TA0CCR0=500; // TA1CCR0 寫入 2000（1MHZ/2000）輸出達到了 500HZ
}
void main(void)
{
WDTCTL=WDTPW+WDTHOLD;
LCD_Init();//OLED初始化
PMW_OUT_Init ();
P3DIR|=BIT2;
P3DIR|=BIT6;
P3OUT&=~BIT6;
ADC10CTL1 |= CONSEQ_2; //單通道重復采樣模式
ADC10CTL0 |= SREF_1+REFON+REF2_5V;//選擇內部參考源 2.5V，打開基準源
ADC10CTL0 |= ADC10SHT_3+MSC; //過采樣率設置為 64 個采樣周期，打開 AD 轉換
ADC10CTL1|= ADC10SSEL_1+ADC10DIV_1+SHS_0; //ACLK2 分頻為采樣時鐘，用ADC10SC 觸發采集
ADC10CTL1 |=INCH_3; //選擇通道 A1
ADC10CTL0 |= ADC10ON; //開啟 ADC10
ADC10AE0 |= BIT3; //開啟外部通道 A1
while(1)
{
P3OUT^=BIT2;
P3OUT^=BIT3;
int i;
for(i=0;i<20;i++)
{
ADC10CTL0 |=ENC+ADC10SC; //開始轉換
while((ADC10CTL0 &ADC10IFG)==0); //等待 ADC10IFG 標志變高（轉換完成）
ADC10_Result+=ADC10MEM; //讀取采樣結果
}
ADC10_Result= ADC10_Result/20*2.5/1023*2;
TEMP_Result=DS18B20_Get_Temp();
int temp=TEMP_Result;
TA0CCR1 =160+(temp-24)*34;
LCD_P8x16Str(18,0,"PWM:");
LCD_Write_8x16Int(68,0,(TA0CCR1)/5);
LCD_P8x16Str(86,0,"%");
LCD_P8x16Str(0,2,"Voltage:");
LCD_Write_8x16Float(68,2,ADC10_Result);
LCD_P8x16Str(110,2,"V");
LCD_P8x16Str(8,4,"Temp:");
LCD_Write_8x16Float(52,4,TEMP_Result);
LCD_P8x16Str(104,4,"C");
ADC10_Result=0;
_delay_cycles(500000);
}
}

復制代碼

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