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Merge pull request #85 from euquiq/new-improved-antenna-calculator

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New Antenna length Calculator
This commit is contained in:
Erwin Ried 2020-06-28 13:21:46 +02:00 committed by GitHub
commit a1501d0993
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 138 additions and 34 deletions
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107
firmware/application/apps/ui_whipcalc.cpp
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@ -64,22 +64,48 @@ void WhipCalcView::update_result() {
text_result_metric.set(m + "m " + cm + "." + mm + "cm");
// ANT500 elements for crude adjustment
length /= 0.14;
if (int(length) <= 4) {
auto elements = to_string_dec_int((int)length, 1);
text_result_ant500.set(elements + " " + frac_str[((int(length * 10.0) % 10) + 1) / 3] + "ANT500 elements");
} else {
text_result_ant500.set("-");
}
uint8_t ant_count = 8; //Shown antennas counter
console.write("\f"); //Equivalent to clear console and string buffer.
length *= 1000; //Get length in mm needed to extend the antenna
for (antenna_entry antenna : antenna_db) { //go thru all antennas available
if (length >= antenna.elements.front() && length <= antenna.elements.back()) //This antenna is OK
{
uint16_t element,refined_quarter=0;
for(element=0; element < antenna.elements.size();element++) {
if (length == antenna.elements[element]) //Exact element in length
{
element++; //Real element is +1 (zero based vector)
break; //Done with this ant
}
else if (length < antenna.elements[element])
{
double remain, this_element, quarter = 0;
remain = length - antenna.elements[element-1]; //mm needed from this element to reach length
this_element=antenna.elements[element] - antenna.elements[element -1]; //total mm on this element
quarter = (remain * 4) / this_element; //havoc & portack ended on this int(quarter) resolution.
if (quarter - int(quarter) > 0.5) { //rounding gave a measure closer to next quarter
refined_quarter=int(quarter) + 1;
if(refined_quarter == 4) { //rounding gave a measure closer to next element
refined_quarter = 0;
element++;
}
} else {
refined_quarter=int(quarter);
}
break; //Done with this ant
}
}
if (!ant_count) {
console.write(" and more ...");
break;
}
console.write(antenna.label + " " + to_string_dec_int(element,1) + frac_str[refined_quarter] + " elements\n");
ant_count--;
}
}
// Imperial
calclength = (speed_of_light_fps / (double)field_frequency.value()) * divider;
/* auto feet = to_string_dec_int((int)length, 3);
auto inch = to_string_dec_int(int(length * 10.0) % 12, 2);
auto inch_c = to_string_dec_int(int(length * 100.0) % 10, 1); */
auto feet = to_string_dec_int(int(calclength), 3);
calclength = get_decimals(calclength,12); //inches
auto inch = to_string_dec_int(int(calclength), 2);
@ -94,14 +120,39 @@ WhipCalcView::WhipCalcView(
add_children({
&labels,
&antennas_on_memory,
&field_frequency,
&options_type,
&text_result_metric,
&text_result_imperial,
&text_result_ant500,
&console,
&button_exit
});
File antennas_file; //LOAD /WHIPCALC/ANTENNAS.TXT from microSD
auto result = antennas_file.open("WHIPCALC/ANTENNAS.TXT");
antenna_db.clear(); //Start with fresh db
if (result.is_valid()) {
antenna_Default(); //There is no txt, store a default ant500
} else {
std::string line; //There is a txt file
char one_char[1]; //Read it char by char
for (size_t pointer=0; pointer < antennas_file.size();pointer++) {
antennas_file.seek(pointer);
antennas_file.read(one_char, 1);
if ((int)one_char[0] > 31) { //ascii space upwards
line += one_char[0]; //Add it to the textline
}
else if (one_char[0] == '\n') { //New Line
txtline_process(line); //make sense of this textline
line.clear(); //Ready for next textline
}
}
if (line.length() > 0) txtline_process(line); //Last line had no newline at end ?
if (!antenna_db.size()) antenna_Default(); //no antenna found on txt, use default
}
antennas_on_memory.set(to_string_dec_int(antenna_db.size(),2) + " antennas"); //tell user
options_type.on_change = [this](size_t, OptionsField::value_t) {
this->update_result();
};
@ -128,4 +179,32 @@ WhipCalcView::WhipCalcView(
update_result();
}
void ui::WhipCalcView::txtline_process(std::string& line) {
if (line.find("#") != std::string::npos) return; //Line is just a comment
size_t previous = 0;
uint16_t value = 0;
antenna_entry new_antenna;
size_t current = line.find(" ");
while (current != std::string::npos) {
if (!previous) { //first space found
new_antenna.label.assign(line,0,current); //antenna label
} else {
value = std::stoi(line.substr(previous,current - previous));
if (!value) return; //No element length? abort antenna
new_antenna.elements.push_back(value); //Store this new element
}
previous = current + 1;
current = line.find(" ",previous); //Search for next space delimiter
}
if (!previous) return; //Not even a label ? drop this antenna!
value = std::stoi(line.substr(previous,current - previous)); //Last element
if (!value) return;
new_antenna.elements.push_back(value);
antenna_db.push_back(new_antenna); //Add this antenna
}
void ui::WhipCalcView::antenna_Default() {
antenna_db.push_back({"ANT500",{ 185, 315, 450, 586, 724, 862} }); //store a default ant500
}
}

56
firmware/application/apps/ui_whipcalc.hpp
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@ -28,6 +28,7 @@
#include "ui_receiver.hpp"
#include "ui_navigation.hpp"
#include "string_format.hpp"
#include <vector>
namespace ui {
@ -43,50 +44,67 @@ private:
const double speed_of_light_mps = 299792458.0; // m/s
const double speed_of_light_fps = 983571087.90472; // feet/s
const std::string frac_str[4] = { "", "1/4 ", "1/2 ", "3/4 " };
const std::string frac_str[4] = { "", " 1/4", " 1/2", " 3/4" };
struct antenna_entry {
std::string label { };
std::vector <uint16_t> elements { };
};
std::vector<antenna_entry> antenna_db { };
double get_decimals(double num, int16_t mult, bool round = false);
void update_result();
uint16_t string_to_number(std::string);
void txtline_process(std::string&);
void antenna_Default();
Labels labels {
{ { 5 * 8, 1 * 16 }, "Loaded:", Color::light_grey() },
{ { 2 * 8, 2 * 16 }, "Frequency:", Color::light_grey() },
{ { 2 * 8, 3 * 16 }, "Type:", Color::light_grey() }
{ { 7 * 8, 3 * 16 }, "Wave:", Color::light_grey() },
{ { 5 * 8, 4 * 16 }, "Metric:", Color::light_grey() },
{ { 3 * 8, 5 * 16 }, "Imperial:", Color::light_grey() }
};
Text antennas_on_memory {
{ 13 * 8, 1 * 16, 2 * 16, 16 },
};
FrequencyField field_frequency {
{ 13 * 8, 2 * 16 },
};
OptionsField options_type {
{ 8 * 8, 3 * 16 },
12,
{ 13 * 8, 3 * 16 },
7,
{
{ "Full wave", 8 },
{ "Half wave", 4 },
{ "Quarter wave", 2 },
{ "3/4 wave", 6 },
{ "1/8 wave", 1 },
{ "3/8 wave", 3 },
{ "5/8 wave", 5 },
{ "7/8 wave", 7 }
{ "Full", 8 },
{ "Half", 4 },
{ "Quarter", 2 },
{ "3/4", 6 },
{ "1/8", 1 },
{ "3/8", 3 },
{ "5/8", 5 },
{ "7/8", 7 }
}
};
Text text_result_metric {
{ 3 * 8, 5 * 16, 10 * 16, 16 },
{ 13 * 8, 4 * 16, 10 * 16, 16 },
"-"
};
Text text_result_imperial {
{ 2 * 8, 6 * 16, 10 * 16, 16 },
"-"
};
Text text_result_ant500 {
{ 2 * 8, 8 * 16, 26 * 16, 16 },
{ 13 * 8, 5 * 16, 10 * 16, 16 },
"-"
};
Console console {
{ 0, 7 * 16, 240, 144 } //Allows to show up to 8 antennas
};
Button button_exit {
{ 72, 264, 96, 32 },
{ 72, 17 * 16, 96, 32 },
"Exit"
};
};

5
firmware/common/ui_widget.cpp
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@ -595,7 +595,10 @@ void Console::write(std::string message) {
pen_color = s.foreground;
escape = false;
} else {
if (c == '\n') {
if (c=='\f') { //Add FORM FEED (clear screen)
clear();
buffer.clear();
} else if (c == '\n') {
crlf();
} else if (c == '\x1B') {
escape = true;

4
sdcard/WHIPCALC/ANTENNAS.TXT Normal file
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@ -0,0 +1,4 @@
#<antenna label> <elements length in mm, separated by a space>
ANT700 95 134 175 206 230 245
ANT500 185 315 450 586 724 862
CHEAPO 118 183 253 326 399 476