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Added antenna calculator #144

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a3da52a
Added antenna calculator
exmatrikulator Jan 15, 2016
0ac1a00
typo
exmatrikulator Jan 16, 2016
1d56369
show half and quarter
exmatrikulator Mar 20, 2016
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2 changes: 1 addition & 1 deletion hackrf
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Submodule hackrf updated 1 files
+2 −6 firmware/common/max2871.c
54 changes: 54 additions & 0 deletions rfapp/antenna.c
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Original file line number Diff line number Diff line change
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#include <rad1olib/setup.h>
#include <r0ketlib/display.h>
#include <r0ketlib/print.h>
#include <r0ketlib/itoa.h>
#include <r0ketlib/keyin.h>
#include <r0ketlib/intin.h>


// default to 100 MHz
#define FREQSTART 100000000

double frequency = FREQSTART;

//speed of light
const double SPEEDOFLIGHT = 299792458;


//# MENU antenna
void antenna_main()
{
frequency=(int64_t)input_int("Frequency:",(int)(frequency/1000000),50,4000,4)*1000000;

lcdClear();
lcdSetCrsr(0,0);
lcdPrintln("Antenna Frequency");

lcdNl();
lcdPrint(" ");
lcdPrint(IntToStr(frequency/1000000,4,F_LONG));
lcdPrintln(" MHz ");

lcdNl();
lcdPrintln("Antenna Length");

float meter = SPEEDOFLIGHT/frequency;

lcdNl();
lcdPrint(" ");
lcdPrint(IntToStr(meter * 1000, 4, F_LONG ));
lcdPrint(" mm");
lcdNl();
lcdPrint(" ");
lcdPrint(IntToStr(meter * 1000 / 2, 4, F_LONG ));
lcdPrint(" mm");
lcdNl();
lcdPrint(" ");
lcdPrint(IntToStr(meter * 1000 / 4, 4, F_LONG ));
lcdPrint(" mm");

lcdDisplay();

getInputWaitRepeat();

}