STM32F103:三.(2)红外测温(MLX90614) (带上位机显示温度曲线)

上位机显示效果：

上位机代码：

（只有一个窗口）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using System.Windows.Forms.DataVisualization.Charting;


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private Queue<double> dataQueue = new Queue<double>(50);
        private float Temp = 0;
        private int num = 5;//每次删除增加几个点

        private delegate void SafeCallDelegate(string text);
        byte[] Arrive_time = new byte[3];
        public Form1()
        {
            InitializeComponent();
            InitChart();

            serialPort1.Encoding = Encoding.GetEncoding("GB2312");  // 设置串口的编码
            Control.CheckForIllegalCrossThreadCalls = false;  // 忽略多线程
            x = this.Width;
            y = this.Height;
            setTag(this);
            //全屏窗体时内容不受任务栏影响
            this.MaximizedBounds = Screen.PrimaryScreen.WorkingArea;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            for (int i = 0; i <= 10; i++)
            {
                comboBox1.Items.Add("COM" + i.ToString());
            }
            // comboBox2.Items.Add("4800");
        }
        private void button1_Click_1(object sender, EventArgs e)
        {
            //string str1;
            if (open_serial_button.Text == "打开串口")/* 先判断当前串口是打开状态还是关闭状态 */
            {
                try
                {
                    serialPort1.Open(); // 打开串口
                    //serialPort1.StopBits = StopBits.One; //使用一个停止位
                    //serialPort1.Parity = Parity.None;//无奇偶校验
                    //串口号和波特率不能修改
                    comboBox1.Enabled = false;
                    comboBox2.Enabled = false;
                    serial.ForeColor = Color.Red;
                    label2.ForeColor = Color.Red;//更改字体颜色
                    // serialPort1.PortName = comboBox1.Text.ToString();//传递端口号
                    //  str1 = comboBox2.Text.ToString();
                    // serialPort1.BaudRate = Convert.ToInt32(str1);
                    open_serial_button.Text = "关闭串口";

                    this.timer1.Start();
                }
                catch
                {
                    MessageBox.Show("端口打开错误，请检查串口", "错误");
                }
            }

            else  // 串口已经打开 需要关闭 
            {
                try
                {
                    serialPort1.Close(); // 关闭串口 
                    open_serial_button.Text = "打开串口";
                    serial.ForeColor = Color.Black;
                    label2.ForeColor = Color.Black;//更改字体颜色
                    //串口号和波特率能修改
                    comboBox1.Enabled = true;
                    comboBox2.Enabled = true;
                    this.timer1.Stop();
                }
                catch
                {
                    MessageBox.Show("关闭串口错误");
                }
            }
        }
        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            byte[] data = new byte[serialPort1.ReadBufferSize];//一次性读出缓冲区所有字节
            serialPort1.Read(data, 0, serialPort1.ReadBufferSize);
            string str = Encoding.Default.GetString(data);
            显示到接收区
            WriteTextSafe(str);

            if (str.Contains("MLX90614"))//判断是否含有相同字符串
            {
                //Temperature:24   Humidity:41    例如
                string result = System.Text.RegularExpressions.Regex.Replace(str, @"[^0-9]+", "");
                Temp = Convert.ToInt32(result)% 10000;
                Temp = Temp/100 + (float)(Temp%100/100);
                Arrive_time[2] = 1;//接收到数据标志位
            }


        }
        private void WriteTextSafe(string text)
        {
            string str = DateTime.Now.ToString("\r\nHH:mm:ss->");
            if (this.textBox_receive.InvokeRequired)
            {
                var d = new SafeCallDelegate(WriteTextSafe);
                if (Arrive_time[0] == 1)如果点击显示时间    
                {
                    this.Invoke(d, new object[] { str });
                }
                this.Invoke(d, new object[] { text });
            }
            else
            {
                textBox_receive.AppendText(text + "  ");
            }
        }


        private void OnResizeEnd(object sender, EventArgs e)
        {
            控件随窗体全屏显示
            //float[] scale = (float[])Tag;
            //int i = 2;

            //foreach (Control ctrl in this.Controls)
            //{
            //    ctrl.Left = (int)(Size.Width * scale[i++]);
            //    ctrl.Top = (int)(Size.Height * scale[i++]);
            //    ctrl.Width = (int)(Size.Width / (float)scale[0] * ((Size)ctrl.Tag).Width);//!!!
            //    ctrl.Height = (int)(Size.Height / (float)scale[1] * ((Size)ctrl.Tag).Height);//!!!

            //    //每次使用的都是最初始的控件大小，保证准确无误。
            //}
        }
        // #region 控件大小随窗体大小等比例缩放
        private float x;//定义当前窗体的宽度
        private float y;//定义当前窗体的高度
        private void setTag(Control cons)
        {
            foreach (Control con in cons.Controls)
            {
                con.Tag = con.Width + ";" + con.Height + ";" + con.Left + ";" + con.Top + ";" + con.Font.Size;
                if (con.Controls.Count > 0)
                {
                    setTag(con);
                }
            }
        }
        private void setControls(float newx, float newy, Control cons)
        {
            //遍历窗体中的控件，重新设置控件的值
            foreach (Control con in cons.Controls)
            {
                //获取控件的Tag属性值，并分割后存储字符串数组
                if (con.Tag != null)
                {
                    string[] mytag = con.Tag.ToString().Split(new char[] { ';' });
                    //根据窗体缩放的比例确定控件的值
                    con.Width = Convert.ToInt32(System.Convert.ToSingle(mytag[0]) * newx);//宽度
                    con.Height = Convert.ToInt32(System.Convert.ToSingle(mytag[1]) * newy);//高度
                    con.Left = Convert.ToInt32(System.Convert.ToSingle(mytag[2]) * newx);//左边距
                    con.Top = Convert.ToInt32(System.Convert.ToSingle(mytag[3]) * newy);//顶边距
                    Single currentSize = System.Convert.ToSingle(mytag[4]) * newy;//字体大小
                    con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);
                    if (con.Controls.Count > 0)
                    {
                        setControls(newx, newy, con);
                    }
                }
            }
        }
        private void Form1_Resize(object sender, EventArgs e)
        {
            float newx = (this.Width) / x;
            float newy = (this.Height) / y;
            setControls(newx, newy, this);
        }

        // #endregion

        //传递串口号的值
        private void comboBox1_SelectedValueChanged(object sender, EventArgs e)
        {
            serialPort1.PortName = comboBox1.Text.ToString();
        }
        //传递串口波特率
        private void comboBox2_SelectedValueChanged(object sender, EventArgs e)
        {
            string str;
            str = comboBox2.Text.ToString();
            serialPort1.BaudRate = Convert.ToInt32(str);
        }

        private void checkBox2_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox2.Checked == true)//发送时间
            {
                Arrive_time[0] = 1;
            }
            else if (checkBox2.Checked == false)
            {
                Arrive_time[0] = 0;
            }
        }

        private void chart1_Click(object sender, EventArgs e)
        {

        }

        private void textBox_receive_TextChanged(object sender, EventArgs e)
        {

        }
        /*********************************************************
        /// 

        /// 初始化图表
        /// 
        private void InitChart()
        {
            //定义图表区域
            this.chart1.ChartAreas.Clear();
            ChartArea chartArea1 = new ChartArea("C1");
            this.chart1.ChartAreas.Add(chartArea1);

  

            //定义存储和显示点的容器
            this.chart1.Series.Clear();
            Series series1 = new Series("温度");
            series1.ChartArea = "C1";
            this.chart1.Series.Add(series1);

            //设置图表显示样式
            this.chart1.ChartAreas[0].AxisY.Minimum = 0;
            this.chart1.ChartAreas[0].AxisY.Maximum = 50;
            this.chart1.ChartAreas[0].AxisX.Interval = num;
            this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver;
            //设置标题
            this.chart1.Titles.Clear();
            this.chart1.Titles.Add("S01");
            this.chart1.Titles[0].Text = "温度显示";
            this.chart1.Titles[0].ForeColor = Color.RoyalBlue;
            this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
            //设置图表显示样式
            this.chart1.Series[0].Color = Color.Red;
            this.chart1.Series[0].ChartType = SeriesChartType.Line;//线形状
            this.chart1.Series[0].Points.Clear();
        }

        //更新队列中的值
        private void UpdateQueueValue()
        {

            if (dataQueue.Count > 100)
            {
                //先出列
                for (int i = 0; i < num; i++)
                {
                    dataQueue.Dequeue();
                }
            }
                for (int i = 0; i < num; i++)
                {
                    dataQueue.Enqueue(Temp);
                }
        }

        private void timer1_Tick_1(object sender, EventArgs e)
        {
            if (Arrive_time[2] == 1)
            {
                Arrive_time[2] = 0;
                UpdateQueueValue();
                this.chart1.Series[0].Points.Clear();
                for (int i = 0; i < dataQueue.Count; i++)
                {
                    this.chart1.Series[0].Points.AddXY((i + 1), dataQueue.ElementAt(i));//温度
                }
            }
        }

    }
}

下位机采集代码：

测试可用

MLX90614.c

/* Includes ------------------------------------------------------------------*/
#include "delay.h"
#include "MLX90614.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ACK	 0
#define	NACK 1
#define SA				0x00 //Slave address 单个MLX90614时地址为0x00,多个时地址默认为0x5a
#define RAM_ACCESS		0x00 //RAM access command
#define EEPROM_ACCESS	0x20 //EEPROM access command
#define RAM_TOBJ1		0x07 //To1 address in the eeprom
/* -------------------------------------------------------------------------------------*/
#define SMBUS_PORT	    GPIOB
#define SMBUS_SCK		GPIO_Pin_14
#define SMBUS_SDA		GPIO_Pin_13

#define RCC_APB2Periph_SMBUS_PORT		RCC_APB2Periph_GPIOB
/* -------------------------------------------------------------------------------------*/
#define SMBUS_SCK_H()	    SMBUS_PORT->BSRR = SMBUS_SCK
#define SMBUS_SCK_L()	    SMBUS_PORT->BRR = SMBUS_SCK
#define SMBUS_SDA_H()	    SMBUS_PORT->BSRR = SMBUS_SDA
#define SMBUS_SDA_L()	    SMBUS_PORT->BRR = SMBUS_SDA

#define SMBUS_SDA_PIN()	    SMBUS_PORT->IDR & SMBUS_SDA //读取引脚电平

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : SMBus_StartBit
* Description    : Generate START condition on SMBus
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SMBus_StartBit(void)
{
    SMBUS_SDA_H();		// Set SDA line
    SMBus_Delay(5);	    // Wait a few microseconds
    SMBUS_SCK_H();		// Set SCL line
    SMBus_Delay(5);	    // Generate bus free time between Stop
    SMBUS_SDA_L();		// Clear SDA line
    SMBus_Delay(5);	    // Hold time after (Repeated) Start
    // Condition. After this period, the first clock is generated.
    //(Thd:sta=4.0us min)
    SMBUS_SCK_L();	    // Clear SCL line
    SMBus_Delay(5);	    // Wait a few microseconds
}

/*******************************************************************************
* Function Name  : SMBus_StopBit
* Description    : Generate STOP condition on SMBus
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SMBus_StopBit(void)
{
    SMBUS_SCK_L();		// Clear SCL line
    SMBus_Delay(5);	    // Wait a few microseconds
    SMBUS_SDA_L();		// Clear SDA line
    SMBus_Delay(5);	    // Wait a few microseconds
    SMBUS_SCK_H();		// Set SCL line
    SMBus_Delay(5);	    // Stop condition setup time(Tsu:sto=4.0us min)
    SMBUS_SDA_H();		// Set SDA line
}

/*******************************************************************************
* Function Name  : SMBus_SendByte
* Description    : Send a byte on SMBus
* Input          : Tx_buffer
* Output         : None
* Return         : None
*******************************************************************************/
u8 SMBus_SendByte(u8 Tx_buffer)
{
    u8	Bit_counter;
    u8	Ack_bit;
    u8	bit_out;

    for(Bit_counter=8; Bit_counter; Bit_counter--)
    {
        if (Tx_buffer&0x80)
        {
            bit_out=1;   // If the current bit of Tx_buffer is 1 set bit_out
        }
        else
        {
            bit_out=0;  // else clear bit_out
        }
        SMBus_SendBit(bit_out);		// Send the current bit on SDA
        Tx_buffer<<=1;				// Get next bit for checking
    }

    Ack_bit=SMBus_ReceiveBit();		// Get acknowledgment bit
    return	Ack_bit;
}

/*******************************************************************************
* Function Name  : SMBus_SendBit
* Description    : Send a bit on SMBus 82.5kHz
* Input          : bit_out
* Output         : None
* Return         : None
*******************************************************************************/
void SMBus_SendBit(u8 bit_out)
{
    if(bit_out==0)
    {
        SMBUS_SDA_L();
    }
    else
    {
        SMBUS_SDA_H();
    }
    SMBus_Delay(2);					// Tsu:dat = 250ns minimum
    SMBUS_SCK_H();					// Set SCL line
    SMBus_Delay(6);					// High Level of Clock Pulse
    SMBUS_SCK_L();					// Clear SCL line
    SMBus_Delay(3);					// Low Level of Clock Pulse
//	SMBUS_SDA_H();				    // Master release SDA line ,
    return;
}

/*******************************************************************************
* Function Name  : SMBus_ReceiveBit
* Description    : Receive a bit on SMBus
* Input          : None
* Output         : None
* Return         : Ack_bit
*******************************************************************************/
u8 SMBus_ReceiveBit(void)
{
    u8 Ack_bit;

    SMBUS_SDA_H();          //引脚靠外部电阻上拉，当作输入
	SMBus_Delay(2);			// High Level of Clock Pulse
    SMBUS_SCK_H();			// Set SCL line
    SMBus_Delay(5);			// High Level of Clock Pulse
    if (SMBUS_SDA_PIN())
    {
        Ack_bit=1;
    }
    else
    {
        Ack_bit=0;
    }
    SMBUS_SCK_L();			// Clear SCL line
    SMBus_Delay(3);			// Low Level of Clock Pulse

    return	Ack_bit;
}

/*******************************************************************************
* Function Name  : SMBus_ReceiveByte
* Description    : Receive a byte on SMBus
* Input          : ack_nack
* Output         : None
* Return         : RX_buffer
*******************************************************************************/
u8 SMBus_ReceiveByte(u8 ack_nack)
{
    u8 	RX_buffer;
    u8	Bit_Counter;

    for(Bit_Counter=8; Bit_Counter; Bit_Counter--)
    {
        if(SMBus_ReceiveBit())			// Get a bit from the SDA line
        {
            RX_buffer <<= 1;			// If the bit is HIGH save 1  in RX_buffer
            RX_buffer |=0x01;
        }
        else
        {
            RX_buffer <<= 1;			// If the bit is LOW save 0 in RX_buffer
            RX_buffer &=0xfe;
        }
    }
    SMBus_SendBit(ack_nack);			// Sends acknowledgment bit
    return RX_buffer;
}

/*******************************************************************************
* Function Name  : SMBus_Delay
* Description    : 延时  一次循环约1us
* Input          : time
* Output         : None
* Return         : None
*******************************************************************************/
void SMBus_Delay(u16 time)
{
    delay_us(time);
}

/*******************************************************************************
* Function Name  : SMBus_Init
* Description    : SMBus初始化
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void SMBus_Init()
{
    GPIO_InitTypeDef    GPIO_InitStructure;

	/* Enable SMBUS_PORT clocks */
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SMBUS_PORT, ENABLE);

    /*配置SMBUS_SCK、SMBUS_SDA为集电极开漏输出*/
    GPIO_InitStructure.GPIO_Pin = SMBUS_SCK | SMBUS_SDA;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SMBUS_PORT, &GPIO_InitStructure);

    SMBUS_SCK_H();
    SMBUS_SDA_H();
}

/*******************************************************************************
 * Function Name  : SMBus_ReadMemory
 * Description    : READ DATA FROM RAM/EEPROM
 * Input          : slaveAddress, command
 * Output         : None
 * Return         : Data
*******************************************************************************/
u16 SMBus_ReadMemory(u8 slaveAddress, u8 command)
{
    u16 data;			// Data storage (DataH:DataL)
    u8 Pec;				// PEC byte storage
    u8 DataL=0;			// Low data byte storage
    u8 DataH=0;			// High data byte storage
    u8 arr[6];			// Buffer for the sent bytes
    u8 PecReg;			// Calculated PEC byte storage
    u8 ErrorCounter;	// Defines the number of the attempts for communication with MLX90614

    ErrorCounter=0x00;				// Initialising of ErrorCounter
	slaveAddress <<= 1;	//2-7位表示从机地址
	
    do
    {
repeat:
        SMBus_StopBit();			    //If slave send NACK stop comunication
        --ErrorCounter;				    //Pre-decrement ErrorCounter
        if(!ErrorCounter) 			    //ErrorCounter=0?
        {
            break;					    //Yes,go out from do-while{}
        }

        SMBus_StartBit();				//Start condition
        if(SMBus_SendByte(slaveAddress))//Send SlaveAddress 最低位Wr=0表示接下来写命令
        {
            goto	repeat;			    //Repeat comunication again
        }
        if(SMBus_SendByte(command))	    //Send command
        {
            goto	repeat;		    	//Repeat comunication again
        }

        SMBus_StartBit();					//Repeated Start condition
        if(SMBus_SendByte(slaveAddress+1))	//Send SlaveAddress 最低位Rd=1表示接下来读数据
        {
            goto	repeat;             	//Repeat comunication again
        }

        DataL = SMBus_ReceiveByte(ACK);	//Read low data,master must send ACK
        DataH = SMBus_ReceiveByte(ACK); //Read high data,master must send ACK
        Pec = SMBus_ReceiveByte(NACK);	//Read PEC byte, master must send NACK
        SMBus_StopBit();				//Stop condition

        arr[5] = slaveAddress;		//
        arr[4] = command;			//
        arr[3] = slaveAddress+1;	//Load array arr
        arr[2] = DataL;				//
        arr[1] = DataH;				//
        arr[0] = 0;					//
        PecReg=PEC_Calculation(arr);//Calculate CRC
    }
    while(PecReg != Pec);		//If received and calculated CRC are equal go out from do-while{}

	data = (DataH<<8) | DataL;	//data=DataH:DataL
    return data;
}

/*******************************************************************************
* Function Name  : PEC_calculation
* Description    : Calculates the PEC of received bytes
* Input          : pec[]
* Output         : None
* Return         : pec[0]-this byte contains calculated crc value
*******************************************************************************/
u8 PEC_Calculation(u8 pec[])
{
    u8 	crc[6];
    u8	BitPosition=47;
    u8	shift;
    u8	i;
    u8	j;
    u8	temp;

    do
    {
        /*Load pattern value 0x000000000107*/
        crc[5]=0;
        crc[4]=0;
        crc[3]=0;
        crc[2]=0;
        crc[1]=0x01;
        crc[0]=0x07;

        /*Set maximum bit position at 47 ( six bytes byte5...byte0,MSbit=47)*/
        BitPosition=47;

        /*Set shift position at 0*/
        shift=0;

        /*Find first "1" in the transmited message beginning from the MSByte byte5*/
        i=5;
        j=0;
        while((pec[i]&(0x80>>j))==0 && i>0)
        {
            BitPosition--;
            if(j<7)
            {
                j++;
            }
            else
            {
                j=0x00;
                i--;
            }
        }/*End of while */

        /*Get shift value for pattern value*/
        shift=BitPosition-8;

        /*Shift pattern value */
        while(shift)
        {
            for(i=5; i<0xFF; i--)
            {
                if((crc[i-1]&0x80) && (i>0))
                {
                    temp=1;
                }
                else
                {
                    temp=0;
                }
                crc[i]<<=1;
                crc[i]+=temp;
            }/*End of for*/
            shift--;
        }/*End of while*/

        /*Exclusive OR between pec and crc*/
        for(i=0; i<=5; i++)
        {
            pec[i] ^=crc[i];
        }/*End of for*/
    }
    while(BitPosition>8); /*End of do-while*/

    return pec[0];
}

 /*******************************************************************************
 * Function Name  : SMBus_ReadTemp
 * Description    : Calculate and return the temperature
 * Input          : None
 * Output         : None
 * Return         : SMBus_ReadMemory(0x00, 0x07)*0.02-273.15
*******************************************************************************/
float SMBus_ReadTemp(void)
{   
	float temp;
	temp = SMBus_ReadMemory(SA, RAM_ACCESS|RAM_TOBJ1)*0.02-273.15;
	return temp;
}

/*********************************END OF FILE*********************************/

MLX96014.h

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __MLX90614_H
#define __MLX90614_H

/* Includes ------------------------------------------------------------------*/
#include "io.h"
/* Exported types ------------------------------------------------------------*/
/* Exported variables --------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
void SMBus_StartBit(void);
void SMBus_StopBit(void);
void SMBus_SendBit(u8);
u8 SMBus_SendByte(u8);
u8 SMBus_ReceiveBit(void);
u8 SMBus_ReceiveByte(u8);
void SMBus_Delay(u16);
void SMBus_Init(void);
u16 SMBus_ReadMemory(u8, u8);
u8 PEC_Calculation(u8*);
float SMBus_ReadTemp(void); //获取温度值
void SMBus_DisplayTemperature(void);    //在LCD第5，6页显示温度
#endif

/*********************************END OF FILE*********************************/

测试MCU :STM32F103C8T6

测试主函数

	while(1)
	{
	
			fTemperature = SMBus_ReadTemp();

			printf("MLX90614 Measure Temp:%.2f ℃\r\n",fTemperature);//   
			delay_ms(200);
	}