Arduino: WS_KL_1_1
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//////////////////////////////// | |
//WS -Swr/Wattmeter- KL V1.1 // | |
/////////////////////////////// | |
///////////////////////////// | |
//WATTMETER/SWR analyzer KL V1.1 // | |
///////////////////////////// | |
/** Copyright 2014 Luca Facchinetti, IW2NDH | |
All trademarks referred to in source code and documentation are copyright their respective owners. | |
This program is free software: you can redistribute it and/or modify | |
it under the terms of the GNU General Public License as published by | |
the Free Software Foundation, either version 3 of the License, or | |
(at your option) any later version. | |
This program is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
GNU General Public License for more details. | |
You should have received a copy of the GNU General Public License | |
along with this program. If not, see <http://www.gnu.org/licenses/>. | |
If you offer a hardware kit using this software, show your appreciation by sending the author | |
a complimentary kit or a donation to a cats refuge ;-) | |
*/ | |
#include <stdio.h> | |
#include <TimerOne.h> | |
#include "U8glib.h" | |
/**LCD5110 myGLCD(8,9,10,12,11); | |
*/ | |
U8GLIB_PCD8544 u8g(8, 9, 11, 10, 13); | |
int scaleSetHigh = 5; | |
float DbCoupler = 18.0;//8 WOUND = 18.0 Db & 27 Db 14/140 Watt _ 10 WOUND = 20.0 Db & 29 Db 20/200 Watt | |
float step = 0.1; | |
bool scale200; | |
const int thresholdScale = 850; //966; //20 watt = 43 dBm , 43 - 20 = 23 dBm = 3.2Vrms = 4.5 Vp = 5V *(925/1023) | |
float PfromV(float volt){ | |
float p ; | |
float rms; | |
rms = 0.707*(volt); | |
p = pow(rms,2); | |
p = p/(55.0*0.001); | |
p = 10 * log10(p); | |
p = p + DbCoupler; | |
p= p / 10.0; | |
p = pow(10,p); | |
p = p * 0.001 ; | |
return p; | |
} | |
void barra(u8g_uint_t pos, float val){ | |
u8g.drawBox(0 , pos, 82*((min(val,5.0))/5.0), 6); | |
u8g.drawFrame(0 , pos, 82, 6); | |
} | |
void barraSwr(u8g_uint_t pos, float val){ | |
u8g.drawBox(0 , pos, 82*((min(val-1.0,2.0))/2.0), 6); | |
u8g.drawFrame(0 , pos, 82, 6); | |
u8g.drawLine(41 , pos, 41, pos+5); | |
} | |
// the setup routine runs once when you press reset: | |
void setup() { | |
// assign default color value | |
if ( u8g.getMode() == U8G_MODE_R3G3B2 ) { | |
u8g.setColorIndex(255); // white | |
} | |
else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) { | |
u8g.setColorIndex(3); // max intensity | |
} | |
else if ( u8g.getMode() == U8G_MODE_BW ) { | |
u8g.setColorIndex(1); // pixel on | |
} | |
else if ( u8g.getMode() == U8G_MODE_HICOLOR ) { | |
u8g.setHiColorByRGB(255,255,255); | |
} | |
u8g.setDefaultForegroundColor(); | |
u8g.setFont(u8g_font_5x7); | |
u8g.setRot180(); | |
Serial.begin(9600); | |
pinMode(scaleSetHigh, OUTPUT); | |
Timer1.initialize(1000000); // set a timer of length 1000000 microseconds (or 1 sec - or 1Hz => ) | |
Timer1.attachInterrupt( timerIsr ); // attach the service routine here | |
Timer1.stop(); | |
digitalWrite(scaleSetHigh, LOW); // turn the scale on 20W (HIGH is the voltage level) | |
} | |
void set200Scale(){ | |
scale200 = true; | |
DbCoupler = 27.0; | |
step = step / 3.0; | |
digitalWrite(scaleSetHigh, HIGH); // turn the scale on 200W (HIGH is the voltage level) | |
Timer1.resume(); | |
delay(50); | |
} | |
void draw() { | |
// the loop routine runs over and over again forever: | |
float PForward; | |
float PReverse; | |
float ro; | |
float swr; | |
// read the input on analog pin 0 | |
int gap; | |
int rev; | |
int fw = analogRead(A2); ///forward vicino antenna | |
if (fw > thresholdScale && !scale200) { | |
set200Scale(); | |
fw = analogRead(A2); ///forward vicino antenna | |
} | |
gap = analogRead(A0); | |
rev = analogRead(A1); | |
float voltgap = gap * (5.0 / 1023.0) + step; | |
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): | |
float voltfw = fw * (5.0 / 1023.0); | |
// if (voltfw <= voltgap ) voltfw = 0.0 ; | |
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): | |
float voltrev = rev * (5.0 / 1023.0); | |
// if (voltrev <= voltgap ) voltrev = 0.0 ; | |
// print out the value you read: | |
// Serial.print(voltgap); | |
// Serial.print(" A0 \t"); | |
// Serial.print(fw); | |
// Serial.print(" A2 \t"); | |
// //Serial.print(PfromV(voltfw)); | |
// Serial.print(" A1 \t"); | |
// Serial.print(voltrev); | |
// Serial.println("\t"); | |
// //Serial.println(PfromV(voltrev)); | |
PForward = PfromV(voltfw); | |
PReverse = PfromV(voltrev); | |
if (voltgap > voltrev){ | |
swr = 1.01; | |
}else{ | |
ro = sqrt(PReverse/PForward); | |
swr = (1 + ro)/(1-ro); | |
} | |
u8g.setPrintPos(0, 14); | |
u8g.print("Forward"); | |
u8g.setPrintPos(0, 29); | |
u8g.print("Reverse"); | |
u8g.setPrintPos(25, 45); | |
u8g.print("SWR"); | |
u8g.setPrintPos(0, 45); | |
if(!scale200) { | |
u8g.print("LOW"); | |
} | |
else{ | |
u8g.print("HIGH"); | |
} | |
u8g.setPrintPos(50, 14); | |
u8g.print(PForward, 1); | |
u8g.setPrintPos(50, 29); | |
u8g.print(PReverse, 1); | |
u8g.setPrintPos(50, 45); | |
u8g.print(swr, 2); | |
barra(0,voltfw); | |
barra(16,voltrev); | |
barraSwr(31,swr); | |
} | |
void loop(void) { | |
u8g.firstPage(); | |
do { | |
delay(10); | |
draw(); | |
} while( u8g.nextPage() ); | |
} | |
/// -------------------------- | |
/// Custom ISR Timer Routine | |
/// -------------------------- | |
void timerIsr() | |
{ | |
Timer1.stop(); | |
digitalWrite(scaleSetHigh, LOW); // turn the scale on 20W (HIGH is the voltage level) | |
scale200 = false; | |
DbCoupler = 18.0; | |
step = 0.1; | |
} |
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