Zixun Wang
Real time embedded system project, student no.170411 Project description: temperature plot with switch menu and data collection
Dependencies: C12832 LM75B MMA7660 mbed mbed
Revision 0:ac0f9392c781, committed 2017-01-10
- Comitter:
- Efren777
- Date:
- Tue Jan 10 18:20:02 2017 +0000
- Commit message:
- Real time embedded system project
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C12832.lib Tue Jan 10 18:20:02 2017 +0000 @@ -0,0 +1,1 @@ +https://mbed.org/users/chris/code/C12832/#7de323fa46fe
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/LM75B.lib Tue Jan 10 18:20:02 2017 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/neilt6/code/LM75B/#fc27dc535ea9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MMA7660.lib Tue Jan 10 18:20:02 2017 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/Sissors/code/MMA7660/#a8e20db7901e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Jan 10 18:20:02 2017 +0000
@@ -0,0 +1,273 @@
+//project: Real_time embedded system
+#include "mbed.h"
+#include "C12832.h"
+#include "LM75B.h"
+#include "MMA7660.h"
+
+// Using Arduino pin notation
+C12832 lcd(D11, D13, D12, D7, D10);
+
+//Temperature measurement sensor set up
+LM75B tem(D14,D15);
+
+//joystick
+DigitalIn up(A2);
+DigitalIn down(A3);
+DigitalIn left(A4);
+DigitalIn right(A5);
+DigitalIn center(D4);
+
+//two Potentiometers
+AnalogIn pot1 (A0);
+AnalogIn pot2 (A1);
+
+//3 Axis Accelerometer
+MMA7660 MMA(D14,D15);
+
+//led on shiled
+PwmOut r (D5);
+PwmOut b (D8);
+PwmOut g (D9);
+
+//temperature value store in x1,2,3,4
+float a=0; //temperature store in a
+float x1=0,x2=0,x3=0,x4=0;
+
+//y axis point of each point need to plot on lcd
+int y1=20,y2=20,y3=20,y4=20;
+
+void counter (void);
+void findy (void);
+float d=0;//distance between each y-axis point on plot
+float dyarray[18];
+float x1array[18],x2array[18],x3array[18],x4array[18];
+float x1min=0,x2min=0,x3min=0,x4min=0;
+
+//find max and min for y axis
+void findmax(void);
+void findmin(void);
+float xarray[]= {x1,x2,x3,x4};
+float max=0;//max number of x1,2,3,4
+float min=0;//min number of x1,2,3,4
+//plot funciton
+void plot(void);
+
+//menu
+int menu =0;//this integer to wtich menu
+void joystick (void);//use joystick to change menu
+
+//Highest tem and lowest tem
+void temdata(void);
+int nod=0;//number of data
+int highlow=0;
+float hightem=0,lowtem=0;
+
+//timer
+Timer t;
+int main()
+{
+ r=1;
+ b=1;
+ g=1;
+ lcd.cls();//clear screen
+ t.start();//start timer
+ while(1) {
+ joystick();//detect any movement at joystick
+ temdata();//collecting temperature data
+ switch (menu) {//using swtich menu to show different case on screen
+ case 0://title 1
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Real Time Embeded System");
+ lcd.locate(0,18);
+ lcd.printf("Scroll with Joystick");
+ wait(1);
+ break;
+ case 1://title 2
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Project: Temprature Plot");
+ lcd.locate(0,18);
+ lcd.printf("Student No.170411");
+ wait(1);
+ break;
+ case 2:// showing temperature and plot for latest four result
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Tem:");
+ //print temperature
+ lcd.locate(21,0);
+ lcd.printf("%.1f\n",x1);
+
+ lcd.locate(46,0);
+ lcd.printf("%.1f\n",x2);
+
+ lcd.locate(71,0);
+ lcd.printf("%.1f\n",x3);
+
+ lcd.locate(96,0);
+ lcd.printf("%.1f\n",x4);
+ plot();//plot diagram
+ counter();//shift data from right to left and store latest data at x4
+ wait(1);
+ break;
+ case 3://show how much time taken and how many data collect from temperature sensor
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Time taken: %.2f s",t.read());
+ lcd.locate(0,17);
+ lcd.printf("Number of data collect: %i",nod);
+ wait(1);
+ break;
+ case 4:// show highest temperature
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Hightest temprature so far: ");
+ lcd.locate(0,18);
+ lcd.printf("Tem: %.2f",hightem);
+ wait(1);
+ break;
+ case 5:// show lowest temperature
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Lowest temprature so far: ");
+ lcd.locate(0,18);
+ lcd.printf("Tem: %.2f",lowtem);
+ wait(1);
+ break;
+ }//switch
+ }//while
+}//main
+void joystick()//detect two button at joystick (up and down)
+{
+ //change "menu" to change menu at switch
+ if (down==1) {
+ menu=menu+1;
+ }
+ if (up==1) {
+ menu=menu-1;
+ }
+ //use those if statement to create a close loop between menu=0 to menu=5
+ if (menu>5) {
+ menu=0;
+ }
+ if (menu<0) {
+ menu=5;
+ }
+
+}
+void temdata()
+{
+ a=tem.temp();//get current temperature and store to a
+ nod=nod+1;//counter (nod) count how many data collect from sensor
+ if (highlow==0) {//when collect first data, store first temperature value to hightem and lowtem
+ hightem=a;
+ lowtem=a;
+ highlow=1;//set highlow to 1, so this function will only run once
+ }
+ if (hightem<=a) {//store highest temprature value into hightem
+ hightem=a;
+ }
+ if (lowtem>=a) {//store lowest temprature value into lowtem
+ lowtem=a;
+ }
+}
+void counter()//shift data from right to left
+{
+ x1=x2;
+ x2=x3;
+ x3=x4;
+ x4=a;
+}
+void plot()
+{
+ //plot diagram
+ findy();//find y value at y axis of each data (x1,2,3,4)
+ lcd.line(100,y4,76,y3,1);
+ lcd.line(76,y3,50,y2,1);
+ lcd.line(50,y2,27,y1,1);
+}
+void findy()
+{
+ findmax();//find maximum value from x1,2,3,4
+ findmin();//find minimum value from x1,2,3,4
+ d=(max-min)/18;//caculate different between each point at y-axis
+ //y-axis point writen in yarray
+ int yarray[] = {30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12};
+ int i;
+ for (i=0; i<18; i=i+1) {//using for loop to find y value for each x
+ dyarray[i]=min+i*d;//this array store temperature map according to four x temperature and 18 y axis
+ //x1
+ x1array[i]=x1-dyarray[i];//find different between x1 and dyarray
+ if (x1array[i]<0) {//store absolute vaue of x1array
+ x1array[i]=-x1array[i];
+ }
+ if (i==0) {//store first x1array to x1min
+ x1min=x1array[i];
+ }
+ if (x1array[i]<=x1min) {//find minimum value of x1array,
+ y1=yarray[i];//store corresponding y into y1
+ x1min=x1array[i];
+ }
+ //x2
+ x2array[i]=x2-dyarray[i];
+ if (x2array[i]<0) {
+ x2array[i]=-x2array[i];
+ }
+ if (i==0) {
+ x2min=x2array[i];
+ }
+ if (x2array[i]<=x2min) {
+ y2=yarray[i];
+ x2min=x2array[i];
+ }
+ //x3
+ x3array[i]=x3-dyarray[i];
+ if (x3array[i]<0) {
+ x3array[i]=-x3array[i];
+ }
+ if (i==0) {
+ x3min=x3array[i];
+ }
+ if (x3array[i]<=x3min) {
+ y3=yarray[i];
+ x3min=x3array[i];
+ }
+ //x4
+ x4array[i]=x4-dyarray[i];
+ if (x4array[i]<0) {
+ x4array[i]=-x4array[i];
+ }
+ if (i==0) {
+ x4min=x4array[i];
+ }
+ if (x4array[i]<=x4min) {
+ y4=yarray[i];
+ x4min=x4array[i];
+ }
+ }
+}
+
+void findmax()
+{
+ max=x1;
+ int i;
+ float xarray[]= {x1,x2,x3,x4};
+ for(i=0; i<4; i=i+1) {
+ if (xarray[i]>max) {
+ max=xarray[i];
+ }
+ }
+}
+
+void findmin()
+{
+ min=x1;
+ int i;
+ float xarray[]= {x1,x2,x3,x4};
+ for(i=0; i<4; i=i+1) {
+ if (xarray[i]<min) {
+ min=xarray[i];
+ }
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Jan 10 18:20:02 2017 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/25aea2a3f4e3 \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.lib Tue Jan 10 18:20:02 2017 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/screamer/code/mbed/#aff670d0d510