(1)LED显示系统运行状态；
(2)外接锂电池供电，设计的系统具有低功耗特点；
(3)使用AD采集电池电压，并且在OLED显示；
(4)采集温度数据，实时OLED显示；
(5)具有OLED显示屏显示功能，显示测量的温度，电池电压；
(6)根据温度传感器测量的温度，输出PWM控制直流电机的转速，模拟智能温控风扇。
文档内容:http://www.51hei.com/bbs/dpj-213910-1.html
单片机源程序如下:
- #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;
- //复位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);
- }
- //写一个字节到DS18B20
- //dat：要写入的字节
- 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;
- }
- }
- //从DS18B20读一个字节
- 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);
- }
- //开始温度转换
- void DS18B20_Start(void)
- {
- DS18B20_Rst();
- DS18B20_Write_Byte(0xCC);
- DS18B20_Write_Byte(0x44);
- }
- //从ds18b20得到温度值
- //精度：0.1C
- //返回值：温度值 （-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 输出初始化
- {
- P3DIR |= BIT5;
- P3SEL |= BIT5;
- TA0CTL |= TASSEL_1+TACLR+MC_1;
- TA0CCTL1 |= OUTMOD_7; //选择高电平模式的 PWM 输出
- TA0CCR0=500; // TA1CCR0 写入 2000（1MHZ/2000）输出达到了 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; //单通道重复采样模式
- ADC10CTL0 |= SREF_1+REFON+REF2_5V;//选择内部参考源 2.5V，打开基准源
- ADC10CTL0 |= ADC10SHT_3+MSC; //过采样率设置为 64 个采样周期，打开 AD 转换
- ADC10CTL1|= ADC10SSEL_1+ADC10DIV_1+SHS_0; //ACLK2 分 频 为 采 样 时 钟 ， 用ADC10SC 触发采集
- ADC10CTL1 |=INCH_3; //选择通道 A1
- ADC10CTL0 |= ADC10ON; //开启 ADC10
- ADC10AE0 |= BIT3; //开启外部通道 A1
- while(1)
- {
- P3OUT^=BIT2;
- P3OUT^=BIT3;
- int i;
- for(i=0;i<20;i++)
- {
- ADC10CTL0 |=ENC+ADC10SC; //开始转换
- while((ADC10CTL0 &ADC10IFG)==0); //等待 ADC10IFG 标志变高（转换完成）
- ADC10_Result+=ADC10MEM; //读取采样结果
- }
- 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);
- }
- }
代码下载:
RZD.zip
(110.46 KB, 下载次数: 33)
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