465 lines
17 KiB
C++
465 lines
17 KiB
C++
/*
|
|
* This program source code file is part of KICAD, a free EDA CAD application.
|
|
*
|
|
* Copyright (C) 2011 jean-pierre.charras
|
|
* Copyright (C) 1992-2015 Kicad Developers, see AUTHORS.txt for contributors.
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
/* see
|
|
* http://www.desmith.net/NMdS/Electronics/TraceWidth.html
|
|
* http://www.ultracad.com/articles/pcbtemp.pdf
|
|
* for more info
|
|
*/
|
|
|
|
#include <cassert>
|
|
#include <cmath>
|
|
#include <wx/wx.h>
|
|
#include <kiface_i.h>
|
|
#include <dialog_helpers.h>
|
|
|
|
#include "attenuators/attenuator_classes.h"
|
|
#include "class_regulator_data.h"
|
|
#include "pcb_calculator_frame.h"
|
|
#include "pcb_calculator_settings.h"
|
|
#include "units_scales.h"
|
|
|
|
wxString tracks_width_versus_current_formula =
|
|
#include "tracks_width_versus_current_formula.h"
|
|
|
|
extern double DoubleFromString( const wxString& TextValue );
|
|
|
|
// The IPC2221 formula used to calculate track width is valid only for copper material
|
|
const double copper_resistivity = 1.72e-8;
|
|
|
|
void PCB_CALCULATOR_FRAME::writeTrackWidthConfig()
|
|
{
|
|
// Save current parameters values in config.
|
|
auto cfg = static_cast<PCB_CALCULATOR_SETTINGS*>( Kiface().KifaceSettings() );
|
|
|
|
cfg->m_TrackWidth.current = m_TrackCurrentValue->GetValue();
|
|
cfg->m_TrackWidth.delta_tc = m_TrackDeltaTValue->GetValue();
|
|
cfg->m_TrackWidth.track_len = m_TrackLengthValue->GetValue();
|
|
cfg->m_TrackWidth.track_len_units = m_TW_CuLength_choiceUnit->GetSelection();
|
|
cfg->m_TrackWidth.resistivity = m_TWResistivity->GetValue();
|
|
cfg->m_TrackWidth.ext_track_width = m_ExtTrackWidthValue->GetValue();
|
|
cfg->m_TrackWidth.ext_track_width_units = m_TW_ExtTrackWidth_choiceUnit->GetSelection();
|
|
cfg->m_TrackWidth.ext_track_thickness = m_ExtTrackThicknessValue->GetValue();
|
|
cfg->m_TrackWidth.ext_track_thickness_units = m_ExtTrackThicknessUnit->GetSelection();
|
|
cfg->m_TrackWidth.int_track_width = m_IntTrackWidthValue->GetValue();
|
|
cfg->m_TrackWidth.int_track_width_units = m_TW_IntTrackWidth_choiceUnit->GetSelection();
|
|
cfg->m_TrackWidth.int_track_thickness = m_IntTrackThicknessValue->GetValue();
|
|
cfg->m_TrackWidth.int_track_thickness_units = m_IntTrackThicknessUnit->GetSelection();
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::OnTWParametersChanged( wxCommandEvent& event )
|
|
{
|
|
switch(m_TWMode)
|
|
{
|
|
case TW_MASTER_CURRENT:
|
|
OnTWCalculateFromCurrent( event );
|
|
break;
|
|
case TW_MASTER_EXT_WIDTH:
|
|
OnTWCalculateFromExtWidth( event );
|
|
break;
|
|
case TW_MASTER_INT_WIDTH:
|
|
OnTWCalculateFromIntWidth( event );
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::OnTWCalculateFromCurrent( wxCommandEvent& event )
|
|
{
|
|
// Setting the calculated values generates further events. Stop them.
|
|
if( m_TWNested )
|
|
{
|
|
event.StopPropagation();
|
|
return;
|
|
}
|
|
|
|
m_TWNested = true;
|
|
|
|
// Update state.
|
|
if( m_TWMode != TW_MASTER_CURRENT )
|
|
{
|
|
m_TWMode = TW_MASTER_CURRENT;
|
|
TWUpdateModeDisplay();
|
|
}
|
|
|
|
// Prepare parameters:
|
|
double current = std::abs( DoubleFromString( m_TrackCurrentValue->GetValue() ) );
|
|
double extThickness = std::abs( DoubleFromString( m_ExtTrackThicknessValue->GetValue() ) );
|
|
double intThickness = std::abs( DoubleFromString( m_IntTrackThicknessValue->GetValue() ) );
|
|
double deltaT_C = std::abs( DoubleFromString( m_TrackDeltaTValue->GetValue() ) );
|
|
|
|
// Normalize by units.
|
|
extThickness *= m_ExtTrackThicknessUnit->GetUnitScale();
|
|
intThickness *= m_IntTrackThicknessUnit->GetUnitScale();
|
|
|
|
// Calculate the widths.
|
|
double extTrackWidth = TWCalculateWidth( current, extThickness, deltaT_C, false );
|
|
double intTrackWidth = TWCalculateWidth( current, intThickness, deltaT_C, true );
|
|
|
|
// Update the display.
|
|
TWDisplayValues( current, extTrackWidth, intTrackWidth, extThickness, intThickness );
|
|
|
|
// Re-enable the events.
|
|
m_TWNested = false;
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::OnTWCalculateFromExtWidth( wxCommandEvent& event )
|
|
{
|
|
// Setting the calculated values generates further events. Stop them.
|
|
if( m_TWNested )
|
|
{
|
|
event.StopPropagation();
|
|
return;
|
|
}
|
|
m_TWNested = true;
|
|
|
|
// Update state.
|
|
if( m_TWMode != TW_MASTER_EXT_WIDTH )
|
|
{
|
|
m_TWMode = TW_MASTER_EXT_WIDTH;
|
|
TWUpdateModeDisplay();
|
|
}
|
|
|
|
// Load parameters.
|
|
double current;
|
|
double extThickness = std::abs( DoubleFromString( m_ExtTrackThicknessValue->GetValue() ) );
|
|
double intThickness = std::abs( DoubleFromString( m_IntTrackThicknessValue->GetValue() ) );
|
|
double deltaT_C = std::abs( DoubleFromString( m_TrackDeltaTValue->GetValue() ) );
|
|
double extTrackWidth = std::abs( DoubleFromString( m_ExtTrackWidthValue->GetValue() ) );
|
|
double intTrackWidth;
|
|
|
|
// Normalize units.
|
|
extThickness *= m_ExtTrackThicknessUnit->GetUnitScale();
|
|
intThickness *= m_IntTrackThicknessUnit->GetUnitScale();
|
|
extTrackWidth *= m_TW_ExtTrackWidth_choiceUnit->GetUnitScale();
|
|
|
|
// Calculate the maximum current.
|
|
current = TWCalculateCurrent( extTrackWidth, extThickness, deltaT_C, false );
|
|
|
|
// And now calculate the corresponding internal width.
|
|
intTrackWidth = TWCalculateWidth( current, intThickness, deltaT_C, true );
|
|
|
|
// Update the display.
|
|
TWDisplayValues( current, extTrackWidth, intTrackWidth, extThickness, intThickness );
|
|
|
|
// Re-enable the events.
|
|
m_TWNested = false;
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::OnTWCalculateFromIntWidth( wxCommandEvent& event )
|
|
{
|
|
// Setting the calculated values generates further events. Stop them.
|
|
if( m_TWNested )
|
|
{
|
|
event.StopPropagation();
|
|
return;
|
|
}
|
|
|
|
m_TWNested = true;
|
|
|
|
// Update state.
|
|
if( m_TWMode != TW_MASTER_INT_WIDTH )
|
|
{
|
|
m_TWMode = TW_MASTER_INT_WIDTH;
|
|
TWUpdateModeDisplay();
|
|
}
|
|
|
|
// Load parameters.
|
|
double current;
|
|
double extThickness = std::abs( DoubleFromString( m_ExtTrackThicknessValue->GetValue() ) );
|
|
double intThickness = std::abs( DoubleFromString( m_IntTrackThicknessValue->GetValue() ) );
|
|
double deltaT_C = std::abs( DoubleFromString( m_TrackDeltaTValue->GetValue() ) );
|
|
double extTrackWidth;
|
|
double intTrackWidth = std::abs( DoubleFromString( m_IntTrackWidthValue->GetValue() ) );
|
|
|
|
// Normalize units.
|
|
extThickness *= m_ExtTrackThicknessUnit->GetUnitScale();
|
|
intThickness *= m_IntTrackThicknessUnit->GetUnitScale();
|
|
intTrackWidth *= m_TW_IntTrackWidth_choiceUnit->GetUnitScale();
|
|
|
|
// Calculate the maximum current.
|
|
current = TWCalculateCurrent( intTrackWidth, intThickness, deltaT_C, true );
|
|
|
|
// And now calculate the corresponding external width.
|
|
extTrackWidth = TWCalculateWidth( current, extThickness, deltaT_C, false );
|
|
|
|
// Update the display.
|
|
TWDisplayValues( current, extTrackWidth, intTrackWidth, extThickness, intThickness );
|
|
|
|
// Re-enable the events.
|
|
m_TWNested = false;
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::OnTWResetButtonClick( wxCommandEvent& event )
|
|
{
|
|
// a wxString:Format( "%g", xx) is used to use local separator in floats
|
|
m_TrackCurrentValue->SetValue( wxString::Format( "%g", 1.0 ) );
|
|
m_TrackDeltaTValue->SetValue( wxString::Format( "%g", 10.0 ) );
|
|
m_TrackLengthValue->SetValue( wxString::Format( "%g", 20.0 ) );
|
|
m_TW_CuLength_choiceUnit->SetSelection( 0 );
|
|
m_TWResistivity->SetValue( wxString::Format( "%g", copper_resistivity ) );
|
|
m_ExtTrackWidthValue->SetValue( wxString::Format( "%g", 0.2 ) );
|
|
m_TW_ExtTrackWidth_choiceUnit->SetSelection( 0 );
|
|
m_ExtTrackThicknessValue->SetValue( wxString::Format( "%g", 0.035 ) );
|
|
m_ExtTrackThicknessUnit->SetSelection( 0 );
|
|
m_IntTrackWidthValue->SetValue( wxString::Format( "%g", 0.2 ) );
|
|
m_TW_IntTrackWidth_choiceUnit->SetSelection( 0 );
|
|
m_IntTrackThicknessValue->SetValue( wxString::Format( "%g", 0.035 ) );
|
|
m_IntTrackThicknessUnit->SetSelection( 0 );
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::TWDisplayValues( double aCurrent, double aExtWidth,
|
|
double aIntWidth, double aExtThickness, double aIntThickness )
|
|
{
|
|
wxString msg;
|
|
|
|
// Show the current.
|
|
if( m_TWMode != TW_MASTER_CURRENT )
|
|
{
|
|
msg.Printf( wxT( "%g" ), aCurrent );
|
|
m_TrackCurrentValue->SetValue( msg );
|
|
}
|
|
|
|
// Load scale factors to convert into output units.
|
|
double extScale = m_TW_ExtTrackWidth_choiceUnit->GetUnitScale();
|
|
double intScale = m_TW_IntTrackWidth_choiceUnit->GetUnitScale();
|
|
|
|
// Display the widths.
|
|
if( m_TWMode != TW_MASTER_EXT_WIDTH )
|
|
{
|
|
msg.Printf( wxT( "%g" ), aExtWidth / extScale );
|
|
m_ExtTrackWidthValue->SetValue( msg );
|
|
}
|
|
|
|
if( m_TWMode != TW_MASTER_INT_WIDTH )
|
|
{
|
|
msg.Printf( wxT( "%g" ), aIntWidth / intScale );
|
|
m_IntTrackWidthValue->SetValue( msg );
|
|
}
|
|
|
|
// Display cross-sectional areas.
|
|
msg.Printf( wxT( "%g" ), (aExtWidth * aExtThickness) / (extScale * extScale) );
|
|
m_ExtTrackAreaValue->SetLabel( msg );
|
|
msg.Printf( wxT( "%g" ), (aIntWidth * aIntThickness) / (intScale * intScale) );
|
|
m_IntTrackAreaValue->SetLabel( msg );
|
|
|
|
// Show area units.
|
|
wxString strunit = m_TW_ExtTrackWidth_choiceUnit->GetUnitName();
|
|
msg = strunit + wxT( "²" );
|
|
m_extTrackAreaUnitLabel->SetLabel( msg );
|
|
strunit = m_TW_IntTrackWidth_choiceUnit->GetUnitName();
|
|
msg = strunit + wxT( "²" );
|
|
m_intTrackAreaUnitLabel->SetLabel( msg );
|
|
|
|
// Load resistivity and length of traces.
|
|
double rho = std::abs( DoubleFromString( m_TWResistivity->GetValue() ) );
|
|
double trackLen = std::abs( DoubleFromString( m_TrackLengthValue->GetValue() ) );
|
|
trackLen *= m_TW_CuLength_choiceUnit->GetUnitScale();
|
|
|
|
// Calculate resistance.
|
|
double extResistance = ( rho * trackLen ) / ( aExtWidth * aExtThickness );
|
|
double intResistance = ( rho * trackLen ) / ( aIntWidth * aIntThickness );
|
|
|
|
// Display resistance.
|
|
msg.Printf( wxT( "%g" ), extResistance );
|
|
m_ExtTrackResistValue->SetLabel( msg );
|
|
msg.Printf( wxT( "%g" ), intResistance );
|
|
m_IntTrackResistValue->SetLabel( msg );
|
|
|
|
// Display voltage drop along trace.
|
|
double extV = extResistance * aCurrent;
|
|
msg.Printf( wxT( "%g" ), extV );
|
|
m_ExtTrackVDropValue->SetLabel( msg );
|
|
double intV = intResistance * aCurrent;
|
|
msg.Printf( wxT( "%g" ), intV );
|
|
m_IntTrackVDropValue->SetLabel( msg );
|
|
|
|
// And power loss.
|
|
msg.Printf( wxT( "%g" ), extV * aCurrent );
|
|
m_ExtTrackLossValue->SetLabel( msg );
|
|
msg.Printf( wxT( "%g" ), intV * aCurrent );
|
|
m_IntTrackLossValue->SetLabel( msg );
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::TWUpdateModeDisplay()
|
|
{
|
|
wxFont labelfont;
|
|
wxFont controlfont;
|
|
|
|
// Set the font weight of the current.
|
|
labelfont = m_staticTextCurrent->GetFont();
|
|
controlfont = m_TrackCurrentValue->GetFont();
|
|
|
|
if( m_TWMode == TW_MASTER_CURRENT )
|
|
{
|
|
labelfont.SetWeight( wxFONTWEIGHT_BOLD );
|
|
controlfont.SetWeight( wxFONTWEIGHT_BOLD );
|
|
}
|
|
else
|
|
{
|
|
labelfont.SetWeight( wxFONTWEIGHT_NORMAL );
|
|
controlfont.SetWeight( wxFONTWEIGHT_NORMAL );
|
|
}
|
|
|
|
m_staticTextCurrent->SetFont( labelfont );
|
|
m_TrackCurrentValue->SetFont( controlfont );
|
|
|
|
// Set the font weight of the external track width.
|
|
labelfont = m_staticTextExtWidth->GetFont();
|
|
controlfont = m_ExtTrackWidthValue->GetFont();
|
|
|
|
if( m_TWMode == TW_MASTER_EXT_WIDTH )
|
|
{
|
|
labelfont.SetWeight( wxFONTWEIGHT_BOLD );
|
|
controlfont.SetWeight( wxFONTWEIGHT_BOLD );
|
|
}
|
|
else
|
|
{
|
|
labelfont.SetWeight( wxFONTWEIGHT_NORMAL );
|
|
controlfont.SetWeight( wxFONTWEIGHT_NORMAL );
|
|
}
|
|
|
|
m_staticTextExtWidth->SetFont( labelfont );
|
|
m_ExtTrackWidthValue->SetFont( controlfont );
|
|
|
|
// Set the font weight of the internal track width.
|
|
labelfont = m_staticTextIntWidth->GetFont();
|
|
controlfont = m_IntTrackWidthValue->GetFont();
|
|
|
|
if( m_TWMode == TW_MASTER_INT_WIDTH )
|
|
{
|
|
labelfont.SetWeight( wxFONTWEIGHT_BOLD );
|
|
controlfont.SetWeight( wxFONTWEIGHT_BOLD );
|
|
}
|
|
else
|
|
{
|
|
labelfont.SetWeight( wxFONTWEIGHT_NORMAL );
|
|
controlfont.SetWeight( wxFONTWEIGHT_NORMAL );
|
|
}
|
|
|
|
m_staticTextIntWidth->SetFont( labelfont );
|
|
m_IntTrackWidthValue->SetFont( controlfont );
|
|
|
|
// Text sizes have changed when the font weight was changes
|
|
// So, run the page layout to reflect the changes
|
|
wxWindow* page = m_Notebook->GetPage ( 1 );
|
|
page->GetSizer()->Layout();
|
|
}
|
|
|
|
/* calculate track width for external or internal layers
|
|
*
|
|
* Imax = 0.048 * dT^0.44 * A^0.725 for external layer
|
|
* Imax = 0.024 * dT^0.44 * A^0.725 for internal layer
|
|
* with A = area = aThickness * trackWidth ( in mils )
|
|
* and dT = temperature rise in degree C
|
|
* Of course we want to know trackWidth
|
|
*/
|
|
double PCB_CALCULATOR_FRAME::TWCalculateWidth( double aCurrent, double aThickness, double aDeltaT_C,
|
|
bool aUseInternalLayer )
|
|
{
|
|
// Appropriate scale for requested layer.
|
|
double scale = aUseInternalLayer ? 0.024 : 0.048;
|
|
|
|
// aThickness is given in normalize units (in meters) and we need mil
|
|
aThickness /= UNIT_MIL;
|
|
|
|
/* formula is Imax = scale * dT^0.44 * A^0.725
|
|
* or
|
|
* log(Imax) = log(scale) + 0.44*log(dT)
|
|
* +(0.725*(log(aThickness) + log(trackWidth))
|
|
* log(trackWidth) * 0.725 = log(Imax) - log(scale) - 0.44*log(dT) - 0.725*log(aThickness)
|
|
*/
|
|
double dtmp = log( aCurrent ) - log( scale ) - 0.44 * log( aDeltaT_C ) - 0.725 * log( aThickness );
|
|
dtmp /= 0.725;
|
|
double trackWidth = exp( dtmp );
|
|
|
|
trackWidth *= UNIT_MIL; // We are using normalize units (sizes in meters) and we have mil
|
|
return trackWidth; // in meters
|
|
}
|
|
|
|
|
|
double PCB_CALCULATOR_FRAME::TWCalculateCurrent( double aWidth, double aThickness, double aDeltaT_C,
|
|
bool aUseInternalLayer )
|
|
{
|
|
// Appropriate scale for requested layer.
|
|
double scale = aUseInternalLayer ? 0.024 : 0.048;
|
|
|
|
// Convert thickness and width to mils.
|
|
aThickness /= UNIT_MIL;
|
|
aWidth /= UNIT_MIL;
|
|
|
|
double area = aThickness * aWidth;
|
|
double current = scale * pow( aDeltaT_C, 0.44 ) * pow( area, 0.725 );
|
|
return current;
|
|
}
|
|
|
|
|
|
void PCB_CALCULATOR_FRAME::initTrackWidthPanel()
|
|
{
|
|
wxString msg;
|
|
|
|
// Disable calculations while we initialise.
|
|
m_TWNested = true;
|
|
|
|
// Read parameter values.
|
|
auto cfg = static_cast<PCB_CALCULATOR_SETTINGS*>( Kiface().KifaceSettings() );
|
|
|
|
m_TrackCurrentValue->SetValue( cfg->m_TrackWidth.current );
|
|
m_TrackDeltaTValue->SetValue( cfg->m_TrackWidth.delta_tc );
|
|
m_TrackLengthValue->SetValue( cfg->m_TrackWidth.track_len );
|
|
m_TW_CuLength_choiceUnit->SetSelection( cfg->m_TrackWidth.track_len_units );
|
|
#if 0 // the IPC formula is valid for copper traces, so we do not currently adjust the resistivity
|
|
m_TWResistivity->SetValue( cfg->m_TrackWidth.resistivity );
|
|
#else
|
|
m_TWResistivity->SetValue( wxString::Format( "%g", copper_resistivity ) );
|
|
#endif
|
|
m_ExtTrackWidthValue->SetValue( cfg->m_TrackWidth.ext_track_width );
|
|
m_TW_ExtTrackWidth_choiceUnit->SetSelection( cfg->m_TrackWidth.ext_track_width_units );
|
|
m_ExtTrackThicknessValue->SetValue( cfg->m_TrackWidth.ext_track_thickness );
|
|
m_ExtTrackThicknessUnit->SetSelection( cfg->m_TrackWidth.ext_track_thickness_units );
|
|
m_IntTrackWidthValue->SetValue( cfg->m_TrackWidth.int_track_width );
|
|
m_TW_IntTrackWidth_choiceUnit->SetSelection( cfg->m_TrackWidth.int_track_width_units );
|
|
m_IntTrackThicknessValue->SetValue( cfg->m_TrackWidth.int_track_thickness );
|
|
m_IntTrackThicknessUnit->SetSelection( cfg->m_TrackWidth.int_track_thickness_units );
|
|
|
|
if( tracks_width_versus_current_formula.StartsWith( "<!" ) )
|
|
m_htmlWinFormulas->SetPage( tracks_width_versus_current_formula );
|
|
else
|
|
{
|
|
wxString html_txt;
|
|
ConvertMarkdown2Html( wxGetTranslation( tracks_width_versus_current_formula ), html_txt );
|
|
m_htmlWinFormulas->SetPage( html_txt );
|
|
}
|
|
|
|
// Make sure the correct master mode is displayed.
|
|
TWUpdateModeDisplay();
|
|
|
|
// Enable calculations and perform the initial one.
|
|
m_TWNested = false;
|
|
wxCommandEvent dummy;
|
|
OnTWParametersChanged( dummy );
|
|
}
|