A Clark
Log Test Code
Fork of
VoltageThreshold
by 
A Clark
Revision 3:9b47638100af, committed 2014-04-08
- Comitter:
- ajclark2
- Date:
- Tue Apr 08 21:01:31 2014 +0000
- Parent:
- 2:d5b23f4e6884
- Commit message:
- Log Test
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/AntennaLog.cpp Tue Apr 08 21:01:31 2014 +0000
@@ -0,0 +1,85 @@
+#include "mbed.h"
+#define PI 3.1415
+#include "C12832.h"
+
+LocalFileSystem local("local"); // Create the local filesystem under the name "local"
+
+C12832 lcd(p5, p7, p6, p8, p11);
+
+Timer t;
+
+AnalogIn ain_v1(p19); // Input voltage from antenna
+
+ // Global variables declared
+ float v1, m, b, p_in, Pt, Gt, Gr, Pr, f, c, r;
+ float lv_r[250], lv_v1[250];
+ int k;
+
+int main()
+{
+
+ // Open logging file
+ FILE *fp = fopen("/local/mBedOutp.m", "w");
+
+ //logging setup
+ for(k=0;k<250;k++)
+ {
+ lv_r[k] = 0.0;
+ lv_v1[k] = 0.0;
+ }
+ k = 0;
+
+ t.start();
+ while(k<250)
+ {
+ // Voltage to Power calculations
+ v1 = ain_v1*3.33; // ain_v1; // Comes from antenna (Can adjust manually for now) (3.3 is for scaling voltage properly... ask Feemster why this is necessary.
+ b = 2.095; // (volts) Direct function generator measurement
+ m = .0316; // volts/dBm (Calculated at 2000 MHz and 0 and -40 dBm)
+ p_in = (v1-b)/m; // Derived from v = m*p+b (linear relationship of voltage and power)
+
+ // Range equation Terms
+ Pt = .0398; //(watts or 1mW or 0 dBm) Power Transmitted. This is ~16 dBm (.0398 watts) for an iphone 5
+ Gt = 1; // Unitless (1 for FG) Shouldn't both of these gains be 'directive' gains, not power gains
+ Gr = .007; // (.007) (7 mW) How do we get this? 7 milliwatt?
+ Pr = pow(10, ((p_in-30)/10)); // (watts)
+
+ // Free Space Loss Terms
+ f = 2400000000; // (Hz) This will be constant for a phone... but what to put for the FG
+ c = 300000000; // m/s
+
+ r = (c*(sqrt(Pt*Gt*Gr)/Pr))/(4*PI*f);
+
+ printf("\rRange (meters) = %.3f\n\r",r);
+ //printf("Power (watts) = %.3f\n\r",Pr);
+ printf("Voltage into mBed = %.4f\n\r",v1);
+ //printf("%.4f\n\r",v1);
+
+ lcd.cls();
+ lcd.locate(0,3);
+ lcd.printf("Voltage (volts) = %.4f",v1);
+
+ lcd.locate(0,15);
+ lcd.printf("Range (meters) = %.4f",r);
+
+ //LOG stuff
+ if(k<250)
+ { lv_r[k] = r;
+ lv_v1[k] = v1;
+ k++;
+ }
+
+ } // End of while=======================================================
+
+ if(1)
+ {
+
+ for(k=0;k<250;k++)
+ { fprintf(fp,"lv.r(%d,1) = %.3f;\n",k+1,lv_r[k]);
+ fprintf(fp,"lv.v1(%d,1) = %.4f;\n",k+1,lv_v1[k]);
+ }
+
+ }// End of IF loop
+
+ fclose(fp);
+} // End of main loop=======================================================
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C12832.lib Tue Apr 08 21:01:31 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/chris/code/C12832/#7de323fa46fe
--- a/main.cpp Wed Apr 02 12:26:31 2014 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,43 +0,0 @@
-#include "mbed.h"
-#define PI 3.1415
-
-Timer t;
-
-AnalogIn ain_v1(p20); // Input voltage from antenna
-
-
-int main()
-{
- float v1, m, b, p_in, Pt, Gt, Gr, Pr, f, c, r;
-
- t.start();
- while(t.read()<10.0)
- {
- // Voltage to Power calculations
- v1 = ain_v1; // ain_v1; // Comes from mBed (Can adjust manually for now)
- b = 2.095; // (volts) Direct function generator measurement
- m = .0316; // volts/dBm (Calculated at 2000 MHz and 0 and -40 dBm)
- p_in = (v1-b)/m; // Derived from v = m*p+b (linear relationship of voltage and power)
-
- // Range equation Terms
- Pt = .001; //(watts or 1mW or 0 dBm) Power Transmitted. This is ~16 dBm (.0398 watts) for an iphone 5
- Gt = 1; // Unitless (1 for FG) Shouldn't both of these gains be 'directive' gains, not power gains
- Gr = .007; // (.007) (7 mW) How do we get this? Should be on datasheet... but calc required? 7 milliwatt?
- Pr = pow(10, ((p_in-30)/10)); // (watts)
-
- // Free Space Loss Terms
- f = 2000000000; // (Hz) This will be constant for a phone... but what to put for the FG
- c = 300000000; // m/s
-
- r = (c*(sqrt(Pt*Gt*Gr)/Pr))/(4*PI*f);
-
- //printf("\rRange (meters) = %.3f\n\r",r);
- //printf("Power (watts) = %.4f\n\r",Pr);
- printf("Voltage into mBed = %.4f\n\r",v1);
- }
-}
-
-
-
-
-