这是一个DSP28335驱动Lcd12864显示Ds18b20采集到的温度,并通过Sci方式传输至PC,使用Matlab制作上位机软件进行数据保存与显示的文章。
首先主要是为了弥补 CCS无法实时捕捉数据至上位机的缺陷(可能CCS有,但是我却没找到,如果有读者知道具体答案,请留言告诉我。)。当然串口传输来的数据也有不足的地方,就是这些数据只能让我们感性的观看,如果想做数据分析,如FFT等,可能数据的采样精度就不够了。所以这也是一个不足的地方,希望日后能有解决的办法。下面开始正文部分吧!
废话不多说,先来张效果图:
图1是DSP_demo板加Lcd12864的显示。显示的比较粗糙,026.56就是26.56℃,一些细节没有做好,主要是功能的实现。
图2是使用Matlab2017b的AppDesigner制作的串口通信上位机软件,具体功能有:发送(TX)、接收(RX)、实时绘图、数据实时保存等。其中COM口和波特率需要设置,其他的如:数据位、校验位、停止位等等,已经在代码中默认设置了,因为只是这个小设计的定制版本,也没有高兴将所有功能都全部放置在界面上。
图像中,出现了34℃,那是我用手拿住了 Ds18b20。目前是6月底,江苏黄梅天,今天室温就是27℃左右。
图3是采集到的数据。只是展示了部分,刚开机的时候是没有打开文本存储按钮的,因此第一个数据与图2中接收数据框中前几个数据不是对应的。
效果展示完了,那么接下来就是代码部分:
- /*
- * 功能:1.DS18B20进行温度采集,并使用12864进行显示
- * 2.将采集到的温度 通过SCIA传输,因为SCIB的9口被12864占用,所以不能用SCIB
- * 3.SCIA使用CpuTimer0中断,1s传输一次温度数据给PC,未使用FIFO中断
- * 波特率:9600 8位数据位,1位停止位,无校验位
- */
-
- #include "DSP2833x_Project.h"
- #include "math.h"
-
- #include "lcd12864.h"
- #include "ds18b20_para.h"
-
- #define uchar unsigned char
-
- void init_port(void);
- uchar Init_DS18B20();
- uchar ReadOneChar(void);
- void WriteOneChar(uchar dat);
- float ReadTemperature();
- void lcd_init(void);
- void lcd_write_cmd(uchar cmd);
- void lcd_write_dat(uchar dat);
- void LCD12864SetAddress_f( uchar x, uchar y ); //地址转换
- void show(uchar x, uchar y, uchar * data);
-
- void scia_init(void);
- void GPIO_init();
- interrupt void Timer0_ISR(void);
-
- uchar table[7];
-
- int main(void)
- {
-
- float tt;
- int tt1;
-
- InitSysCtrl();
-
- init_port(); //ds18b20 & 12864 端口初始化
-
- DINT;
- InitPieCtrl(); //初始化中断控制
- IER = 0x0000;
- IFR = 0x0000;
- InitPieVectTable();//初始化中断矢量表
-
- GPIO_init(); //配置端口为SCI
-
- EALLOW; // This is needed to write to EALLOW protected registers
- PieVectTable.TINT0 = &Timer0_ISR;//将定时器0中断服务函数入口放入中断向量表
- EDIS; // This is needed to disable write to EALLOW protected registers
-
- InitCpuTimers();
- ConfigCpuTimer(&CpuTimer0, 150, 1000000); //定时器0定时时间为 1s
-
- scia_init(); //SCIA端口初始化
-
- lcd_init();
-
- PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable the PIE block
- PieCtrlRegs.PIEIER1.bit.INTx7=1; // PIE Group 1, INT7
- IER = 0x001;
- EINT;
-
-
- CpuTimer0Regs.TCR.bit.TSS = 0; // 启动定时器0
-
- while (1)
- {
- tt=ReadTemperature();
- tt1=tt*100+0.5;
- //留两个小数点就*100,+0.5是四舍五入,因为C语言浮点数转换为整型的时候把小数点
- //后面的数自动去掉,不管是否大于0.5,而+0.5之后大于0.5的就是进1了,小于0.5的就
- //算加上0.5,还是在小数点后面。
-
- table[0]=tt1/10000+0x30; //百位
- table[1]=tt1%10000/1000+0x30;//十位
- table[2]=tt1%1000/100+0x30;//个位
- table[3]='.';
- table[4]=tt1%100/10+0x30;//十分位;
- table[5]=tt1%10+0x30;//百分位;
- table[6]='\0'; //用来中止一组显示数据
- show(0,0,table);
- }
-
- }
-
- //----------------------
- //--- 12864 及 DS18B20 的初始化
- //----------------------
- void init_port(void)
- {
- EALLOW;
- GpioCtrlRegs.GPBPUD.bit.GPIO40 = 0; // 使能GPIO10 引脚内部上拉
-
- GpioCtrlRegs.GPBMUX1.bit.GPIO40 =0; // 配置GPIO10为通用I/O口
-
- GpioCtrlRegs.GPBQSEL1.bit.GPIO40 = 0; // GPIO40与系统时钟SYSCLKOUT 同步
-
- //lcd12864 use
- GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0; // 使能GPIO0 引脚内部上拉
-
- GpioCtrlRegs.GPAPUD.bit.GPIO1 = 1; // 禁止GPIO1 引脚内部上拉
- GpioCtrlRegs.GPAQSEL1.all = 0x0000; // GPIO0-GPIO15与系统时钟SYSCLKOUT 同步
-
- GpioCtrlRegs.GPADIR.all = 0x003FF;// 配置GPIO0-GPIO9为输出引脚
-
- //输出数据LCD_RW和LCD_EN清零
- GpioDataRegs.GPADAT.bit.GPIO0 = 1;
- GpioDataRegs.GPADAT.bit.GPIO1 = 0;
- EDIS;
- }
-
- //----------------------
- //---SCI的初始化
- //----------------------
- void GPIO_init()
- {
- EALLOW;
- GpioCtrlRegs.GPBPUD.bit.GPIO35 = 0; // Enable pull-up for GPIO35 (SCITXDA)
- GpioCtrlRegs.GPBMUX1.bit.GPIO35 = 1; // GPIO35 for SCITXDA operation
-
- GpioCtrlRegs.GPBPUD.bit.GPIO36 = 0; // Enable pull-up for GPIO36 (SCIRXDA)
- GpioCtrlRegs.GPBQSEL1.bit.GPIO36 = 3; // Asynch input GPIO36 (SCIRXDA)
- GpioCtrlRegs.GPBMUX1.bit.GPIO36 = 1; // GPIO36 for SCIRXDA operation
-
- EDIS;
- }
-
-
-
- void scia_init(void)
- {
- SciaRegs.SCICCR.all =0x0007; // 1 stop bit,
- // No parity,8 char bits,
- // async mode, idle-line protocol
- SciaRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK,
- // Disable RX ERR, SLEEP, TXWAKE
-
- SciaRegs.SCIHBAUD =0x0001;
- SciaRegs.SCILBAUD =0x00E7; //构成 0x01e7=487 波特率计算为 37.5M/[(487+1)*8]=9605 近似等于9600
-
- SciaRegs.SCICTL1.bit.SWRESET=1;//Relinquish SCI from Reset
-
- }
-
- interrupt void Timer0_ISR(void)
- {
- int i=0;
-
- while(table[i] != '\0') //不断发送,直到1组温度数据发送完毕
- {
- SciaRegs.SCITXBUF=table[i]; //发送数据
- DELAY_US(1000); //若不加,会出现数据丢失
- i++;
- }
-
- SciaRegs.SCITXBUF='\n'; //每接收一组数据后,换行
-
- PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;//PIE组1应答
- }
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以上是DSP上的代码。接下来是上位机代码,供大家学习。这其中的一部分代码,我也是从网上寻找来的,因此在此要感谢那位哥们开放的串口软件。Appdesigner比较新,界面也不错,如果大家喜欢,可以自己做出修改,但是我希望大家在我这个版本基础上修改后,能在留言处开源自己的内容,让大家一起进步。首先将app的链接给出:
链接:https://pan.baidu.com/s/1NEqKQJX87mv86V9ENZ2kkA
提取码:x3y0 或 https://download.csdn.net/download/wx_simba/11259531
以下是代码,有Matlab的朋友可以直接用 Appdesigner打开查看。注意,至少需要 2016a版本才具有Appdesigner功能。 ***这是回头打的字,插入代码居然没有Matlab的m语言格式。。。还有下面代码看着多,其实估计80%都是系统生成的,我们是无法修改的,实现功能的代码其实不多
- classdef app2 < matlab.apps.AppBase
-
- % Properties that correspond to app components
- properties (Access = public)
- UIFigure matlab.ui.Figure
- pbOpenSerial matlab.ui.control.StateButton
- RXLabel matlab.ui.control.Label
- TXLabel matlab.ui.control.Label
- Label_RX matlab.ui.control.Label
- Label_TX matlab.ui.control.Label
- ReceiveView matlab.ui.control.TextArea
- Button_Send matlab.ui.control.Button
- transmitView matlab.ui.control.TextArea
- Button_Clear matlab.ui.control.Button
- DropDownLabel matlab.ui.control.Label
- ppCOM matlab.ui.control.DropDown
- Label matlab.ui.control.Label
- Label_2 matlab.ui.control.Label
- Lamp matlab.ui.control.Lamp
- Label_3 matlab.ui.control.Label
- ppCOM_2 matlab.ui.control.DropDown
- Panel matlab.ui.container.Panel
- Label_5 matlab.ui.control.Label
- txtStoreSwich matlab.ui.control.Switch
- Label_6 matlab.ui.control.Label
- txtStoreFlag matlab.ui.control.Lamp
- UIAxes matlab.ui.control.UIAxes
- UartsEditFieldLabel matlab.ui.control.Label
- UartsEditField matlab.ui.control.NumericEditField
- end
-
-
- properties (Access = public)
- COM; % 端口号
- Baud_Rate; %波特率
- s ; %端口设置句柄
- RX_num; %接收统计
- TX_num; %发送统计
- RX_once;%一次接收的数据
- RX_Date;%接收的所有数据
- is_open;%是否打开串口标志位
- Flag_i %绘图横坐标的点
-
- end
-
-
-
- methods (Access = public)
- function EveBytesAvailableFcn(app, src, event)
- n = src.BytesAvailable;%获取接收到的字符个数
- if n>0%n>0才继续执行,因为0也会触发中断
- app.RX_num=app.RX_num+n;
- app.Label_RX.Text=num2str(app.RX_num);%将数字转化为字符串输出
- app.RX_once=fread(src,n,'uchar');%读取函数,读取后矩阵为一列
- app.RX_Date =strcat(app.RX_Date, app.RX_once');%字符串拼接,需要转置化为一行
- app.ReceiveView.Value= app.RX_Date;%textarea的设置格式为cell,或单行字符串
- app.Flag_i=app.Flag_i+1;
- t=app.Flag_i*app.UartsEditField.Value;
- y=str2double(char(app.RX_once'));
- plot(app.UIAxes,t,y,'marker','+','linewidth',5,'linestyle','--');
- hold(app.UIAxes,'on');
-
- if strcmp(app.txtStoreSwich.Value,'On')
- app.txtStoreFlag.Color=[0 1 0];
- name_ref=['wx',datestr(now,29),'.txt']; % name_ref=['wx',datestr(now,29),'.xls'];
- fid = fopen(name_ref,'a'); %fid = fopen('c.xls','a');
- fprintf(fid,'%s\r\n',app.RX_once'); %需要转置,进行换行处理,txt换行 要\r\n..xls只\n就可以换行
- fclose(fid);
- else
- app.txtStoreFlag.Color=[0 0 0];
- end
- end
- end
-
- end
-
-
- methods (Access = private)
- % Code that executes after component creation
- function startupFcn(app)
- app.RX_num=0;
- app.TX_num=0;
- app.is_open=0;
- app.Flag_i=0;
- scoms = instrfind;%获取占用的串口号
- if scoms ~= 0%如果存在则关闭,否则不能打开
- stopasync(scoms);
- fclose(scoms);
- delete(scoms);
- end
-
-
- end
- % Button pushed function: Button_Send
- function Button_SendPushed(app, event)
- val=app.transmitView.Value;
- if length(val{1})>0%textarea控件是cell格式,获取需要用{1}
- app.TX_num=app.TX_num+length(val{1});
- app.Label_TX.Text=num2str(app.TX_num);
- fwrite(app.s, char(val), 'uint8', 'async');%需要将val转化为char
- end
- end
- % Value changed function: pbOpenSerial
- function pbOpenSerialValueChanged2(app, event)
-
- app.COM=get(app.ppCOM,'Value');
- app.Baud_Rate=get(app.ppCOM_2,'Value');
- if strcmp(get(app.pbOpenSerial,'Text'),'打开串口')
- try
- app.s=serial(app.COM);
- app.s.BaudRate=str2double(app.Baud_Rate);%设置波特率,str2double 很重要
- app.s.DataBits=8;%设置数据长度
- app.s.StopBits=1;%设置停止位长度
- app.s.InputBufferSize=1024000;%设置输入缓冲区大小为1M
- app.s.BytesAvailableFcnMode='byte'; %串口事件回调设置
- % app.s.Terminator='CR/LF';
- app.s.BytesAvailableFcnCount=1; %输入缓冲区存在10个字节触发回调函数
- app.s.BytesAvailableFcn={@app.EveBytesAvailableFcn};%回调函数的指定
-
- fopen(app.s);%打开串口
- app.is_open=1;
- app.pbOpenSerial.Text='关闭串口';
- app.Lamp.Color=[0 1 0];
- catch err
- msgbox('打开失败');
- end
- else
- try
- fclose(app.s);
- app.pbOpenSerial.Text='打开串口';
- app.Lamp.Color=[0.15 0.15 0.15];
- catch err
- msgbox('关闭失败');
- end
- delete(app.s);
- app.is_open=0;
- end
- end
- % Close request function: UIFigure
- function UIFigureCloseRequest(app, event)
- delete(app)
-
- end
- % Button pushed function: Button_Clear
- function Button_ClearPushed(app, event)
- app.RX_Date ='';
- app.ReceiveView.Value= app.RX_Date;
- app.TX_num=0;
- app.RX_num=0;
- app.Label_TX.Text=num2str(app.TX_num);
- app.Label_RX.Text=num2str(app.RX_num);
- cla(app.UIAxes,'reset');
- end
- % Value changed function: txtStoreSwich
- function txtStoreSwichValueChanged(app, event)
- value = app.txtStoreSwich.Value;
- if strcmp(value,'On')
- app.txtStoreFlag.Color=[0 1 0];
- else
- app.txtStoreFlag.Color=[0 0 0];
- end
- end
- end
- % App initialization and construction
- methods (Access = private)
- % Create UIFigure and components
- function createComponents(app)
- % Create UIFigure
- app.UIFigure = uifigure;
- app.UIFigure.Position = [500 300 895 521];
- app.UIFigure.Name = 'UI Figure';
- app.UIFigure.CloseRequestFcn = createCallbackFcn(app, @UIFigureCloseRequest, true);
- % Create pbOpenSerial
- app.pbOpenSerial = uibutton(app.UIFigure, 'state');
- app.pbOpenSerial.ValueChangedFcn = createCallbackFcn(app, @pbOpenSerialValueChanged2, true);
- app.pbOpenSerial.Text = '打开串口';
- app.pbOpenSerial.FontSize = 16;
- app.pbOpenSerial.FontWeight = 'bold';
- app.pbOpenSerial.Position = [740 311 81 27];
- % Create RXLabel
- app.RXLabel = uilabel(app.UIFigure);
- app.RXLabel.Position = [42 60 25 15];
- app.RXLabel.Text = 'RX:';
- % Create TXLabel
- app.TXLabel = uilabel(app.UIFigure);
- app.TXLabel.Position = [102 60 25 15];
- app.TXLabel.Text = 'TX:';
- % Create Label_RX
- app.Label_RX = uilabel(app.UIFigure);
- app.Label_RX.Position = [66 60 37 15];
- app.Label_RX.Text = '0';
- % Create Label_TX
- app.Label_TX = uilabel(app.UIFigure);
- app.Label_TX.Position = [126 60 82 15];
- app.Label_TX.Text = '0';
- % Create ReceiveView
- app.ReceiveView = uitextarea(app.UIFigure);
- app.ReceiveView.Position = [25 192 161 270];
- % Create Button_Send
- app.Button_Send = uibutton(app.UIFigure, 'push');
- app.Button_Send.ButtonPushedFcn = createCallbackFcn(app, @Button_SendPushed, true);
- app.Button_Send.FontSize = 16;
- app.Button_Send.FontWeight = 'bold';
- app.Button_Send.Position = [716 96 100 27];
- app.Button_Send.Text = '发送';
- % Create transmitView
- app.transmitView = uitextarea(app.UIFigure);
- app.transmitView.Position = [27 88 159 60];
- % Create Button_Clear
- app.Button_Clear = uibutton(app.UIFigure, 'push');
- app.Button_Clear.ButtonPushedFcn = createCallbackFcn(app, @Button_ClearPushed, true);
- app.Button_Clear.FontSize = 16;
- app.Button_Clear.FontWeight = 'bold';
- app.Button_Clear.Position = [716 49 100 27];
- app.Button_Clear.Text = '清空';
- % Create DropDownLabel
- app.DropDownLabel = uilabel(app.UIFigure);
- app.DropDownLabel.HorizontalAlignment = 'right';
- app.DropDownLabel.FontName = 'Calibri';
- app.DropDownLabel.FontSize = 18;
- app.DropDownLabel.Position = [684 422 41 24];
- app.DropDownLabel.Text = '串口';
- % Create ppCOM
- app.ppCOM = uidropdown(app.UIFigure);
- app.ppCOM.Items = {'COM1', 'COM2', 'COM3', 'COM4'};
- app.ppCOM.FontName = 'Calibri';
- app.ppCOM.FontSize = 18;
- app.ppCOM.Position = [740 424 76 25];
- app.ppCOM.Value = 'COM1';
- % Create Label
- app.Label = uilabel(app.UIFigure);
- app.Label.FontSize = 18;
- app.Label.FontWeight = 'bold';
- app.Label.Position = [39 475 42 23];
- app.Label.Text = '接收';
- % Create Label_2
- app.Label_2 = uilabel(app.UIFigure);
- app.Label_2.FontSize = 18;
- app.Label_2.FontWeight = 'bold';
- app.Label_2.Position = [39 151 42 23];
- app.Label_2.Text = '发送';
- % Create Lamp
- app.Lamp = uilamp(app.UIFigure);
- app.Lamp.Position = [695 317 20 20];
- app.Lamp.Color = [0.149 0.149 0.149];
- % Create Label_3
- app.Label_3 = uilabel(app.UIFigure);
- app.Label_3.HorizontalAlignment = 'right';
- app.Label_3.FontName = 'Calibri';
- app.Label_3.FontSize = 18;
- app.Label_3.Position = [682 373 59 24];
- app.Label_3.Text = '波特率';
- % Create ppCOM_2
- app.ppCOM_2 = uidropdown(app.UIFigure);
- app.ppCOM_2.Items = {'300', '600', '1200', '2400', '4800', '9600', '19200', '38400', '115200'};
- app.ppCOM_2.FontName = 'Calibri';
- app.ppCOM_2.FontSize = 18;
- app.ppCOM_2.Position = [756 375 60 25];
- app.ppCOM_2.Value = '9600';
- % Create Panel
- app.Panel = uipanel(app.UIFigure);
- app.Panel.Position = [655 173 231 87];
- % Create Label_5
- app.Label_5 = uilabel(app.Panel);
- app.Label_5.HorizontalAlignment = 'center';
- app.Label_5.Position = [136 24 77 15];
- app.Label_5.Text = '文本存储按钮';
- % Create txtStoreSwich
- app.txtStoreSwich = uiswitch(app.Panel, 'slider');
- app.txtStoreSwich.ValueChangedFcn = createCallbackFcn(app, @txtStoreSwichValueChanged, true);
- app.txtStoreSwich.Position = [151 54 45 20];
- % Create Label_6
- app.Label_6 = uilabel(app.Panel);
- app.Label_6.HorizontalAlignment = 'right';
- app.Label_6.Position = [26 24 77 15];
- app.Label_6.Text = '文本存储指示';
- % Create txtStoreFlag
- app.txtStoreFlag = uilamp(app.Panel);
- app.txtStoreFlag.Position = [52 45 29 29];
- app.txtStoreFlag.Color = [0 0 0];
- % Create UIAxes
- app.UIAxes = uiaxes(app.UIFigure);
- title(app.UIAxes, 'Figure')
- xlabel(app.UIAxes, 'time')
- ylabel(app.UIAxes, 'Y')
- app.UIAxes.LineStyleOrder = {'- '};
- app.UIAxes.NextPlot = 'add';
- app.UIAxes.Position = [197 46 445 438];
- % Create UartsEditFieldLabel
- app.UartsEditFieldLabel = uilabel(app.UIFigure);
- app.UartsEditFieldLabel.HorizontalAlignment = 'right';
- app.UartsEditFieldLabel.Position = [262 18 121 15];
- app.UartsEditFieldLabel.Text = 'Uart发送数据的周期/s';
- % Create UartsEditField
- app.UartsEditField = uieditfield(app.UIFigure, 'numeric');
- app.UartsEditField.Limits = [0 Inf];
- app.UartsEditField.Position = [398 14 49 22];
- app.UartsEditField.Value = 1;
- end
- end
- methods (Access = public)
- % Construct app
- function app = app2
- % Create and configure components
- createComponents(app)
- % Register the app with App Designer
- registerApp(app, app.UIFigure)
- % Execute the startup function
- runStartupFcn(app, @startupFcn)
- if nargout == 0
- clear app
- end
- end
- % Code that executes before app deletion
- function delete(app)
- % Delete UIFigure when app is deleted
- delete(app.UIFigure)
- end
- end
- end
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