The Smell of Molten Projects in the Morning

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Category: Software

General-purpose computers doing something specific

  • EMC2 HAL Configuration by Eagle Schematics: The Code

    As part of that renaming adventure with the Logitech Gamepad configuration, I realized I hadn’t put my version of Martin Shoeneck’s Eagle-to-HAL conversion script anywhere useful.

    Herewith, the script that you’ll apply to schematics built with parts from the hal-config-2.4.lbr.odt library (which you must rename to get ride of the ODT extension):

    /******************************************************************************
     * HAL-Configurator
     *
     * Author: Martin Schoeneck 2008
     * Additional gates and tweaks: Ed Nisley KE4ZNU 2010
     *****************************************************************************/
    #usage "<h1>HAL-Configurator</h1>Start from a Schematic where symbols from hal-config.lbr are used!";
    
    string output_path =    "./";
    string dev_loadrt =     "LOADRT";
    string dev_loadusr =    "LOADUSR";
    string dev_thread =     "THREAD";
    string dev_parameter =  "PARAMETER";
    
    string dev_names[] = {
    "CONSTANT",								// must be first entry to make set_constants() work
    "ABS",				// 2.4
    "AND2",
    "BLEND",			// 2.4
    "CHARGE-PUMP",		// 2.4
    "COMP",
    "CONV_S32_FLOAT",	// 2.4
    "DDT",				// 2.4
    "DEADZONE",			// 2.4
    "DEBOUNCE",			// 2.4
    "EDGE",
    "ENCODER",			// 2.4
    "ENCODER-RATIO",	// 2.4
    "ESTOP-LATCH",
    "FLIPFLOP",
    "FREQGEN",			// 2.4
    "LOWPASS",
    "MULT2",			// 2.4
    "MUX2",
    "MUX4",				// 2.4
    "MUX8",				// 2.4
    "NEAR",				// 2.4
    "NOT",
    "ONESHOT",
    "OR2",
    "SAMPLER",			// 2.4
    "SCALE",			// 2.4
    "SELECT8",			// 2.4
    "SUM2",
    "TIMEDELAY",		// 2.4
    "TOGGLE",			// 2.4
    "WCOMP",			// 2.4
    "XOR2",				// 2.4
    ""					// end flag
    };
    
    /*******************************************************************************
     * Global Stuff
     ******************************************************************************/
    
    string FileName;
    string ProjectPath;
    string ProjectName;
    
    void Info(string Message) {
    	dlgMessageBox(";<b>Info</b><p>\n" + Message);
    }
    
    void Warn(string Message) {
    	dlgMessageBox("!<b>Warning</b><p>\n" + Message + "<p>see usage");
    }
    
    void Error(string Message) {
    	dlgMessageBox(":<hr><b>Error</b><p>\n" + Message + "<p>see usage");
    	exit(1);
    }
    
    string replace(string str, char a, char b) {
    	// in string str replace a with b
    	int pos = -1;
    	do {
    		// find that character
    		pos = strchr(str, a);
    		// replace if found
    		if(pos >= 0) {
    			str[pos] = b;
    		}
    	} while(pos >= 0);
    
    	return str;
    }
    
    // the part name contains an index and is written in capital letters
    string get_module_name(UL_PART P) {
    	// check module name, syntax: INDEX:NAME
    	string mod_name = strlwr(P.name);
    	// split string at the : if exists
    	string a[];
    	int c = strsplit(a, mod_name, ':');
    	mod_name = a[c-1];
    	// if name starts with '[' we need uppercase letters
    	if(mod_name[0] == '[') {
    		mod_name = strupr(mod_name);
    	}
    
    	return mod_name;
    }
    
    string comment(string mess) {
    	string str = "\n\n####################################################\n";
    	if(mess != "") {
    		str += "# " + mess + "\n";
    	}
    
    	return str;
    }
    
    // if this is a device for loading a module, load it (usr/rt)
    string load_module(UL_PART P) {
    	string str = "";
    
    	// it's a module if the device's name starts with LOADRT/LOADUSR
    	if((strstr(P.device.name, dev_loadrt) == 0) ||
    	   (strstr(P.device.name, dev_loadusr) == 0)) {
    
    		// now add the string to our script
    		str += P.value + "\n";
    	}
    
    	return str;
    }
    
    // count used digital gates (and, or, etc) and load module if neccessary
    string load_blocks() {
    	string str = "";
    
    	int index;
    
    	int dev_counters[];
    	string dname[];
    
    	// count the gates that are used
    	schematic(S) { S.parts(P) {
    		strsplit(dname,P.device.name,'.');		// extract first part of name
    		if ("" != lookup(dev_names,dname[0],0)) {
    			for (index = 0;  (dname[0] != dev_names[index]) ; index++) {
    				continue;
    			}
    			dev_counters[index]++;
    		}
    	} }
    
    // force lowercase module names...
    
    	for (index = 0; ("" != dev_names[index]) ; index++) {
    		if (dev_counters[index]) {
    			sprintf(str,"%sloadrt %s\t\tcount=%d\n",str,strlwr(dev_names[index]),dev_counters[index]);
    		}
    	}
    
    	return str;
    }
    
    string hook_function(UL_NET N) {
    	string str = "";
    
    	// is this net connected to a thread (work as functions here)?
    	int    noclkpins       = 0;
    	string thread_name     = "";  // this net should be connected to a thread
    	string thread_position = "";
    	N.pinrefs(PR) {
    		// this net is connected to a clk-pin
    		if(PR.pin.function == PIN_FUNCTION_FLAG_CLK) {
    			// check the part: is it a thread-device?
    			if(strstr(PR.part.device.name, dev_thread) == 0) {
    				// we need the name of the thread
    				thread_name = strlwr(PR.part.name);
    				// and we need the position (position _ is ignored)
    				thread_position = strlwr(PR.pin.name);
    				thread_position = replace(thread_position, '_', ' ');
    			}
    		} else {
    			// no clk-pin, this is no function-net
    			noclkpins++;
    			break;
    		}
    	}
    
    	// found a thread?
    	if(noclkpins == 0 && thread_name != "") {
    		// all the other pins are interesting now
    		N.pinrefs(PR) {
    			// this pin does not belong to the thread
    			if(strstr(PR.part.device.name, dev_thread) != 0) {
    				// name of the pin is name of the function
    				//string function_name = strlwr(PR.pin.name);
    				string function_name = strlwr(PR.instance.gate.name);
    				// if functionname starts with a '.', it will be appended to the modulename
    				if(function_name[0] == '.') {
    					// if the name is only a point, it will be ignored
    					if(strlen(function_name) == 1) {
    						function_name = "";
    					}
    					function_name = get_module_name(PR.part) + function_name;
    				}
    				str += "addf " + function_name + "\t\t" + thread_name + "\t" + thread_position + "\n";
    			}
    		}
    	}
    
    	return str;
    }
    
    string set_parameter(UL_NET N) {
    	string str = "";
    
    	// is this net connected to a parameter-device?
    	int    nodotpins       = 0;
    	string parameter_value = "";
    	N.pinrefs(PR) {
    		// this net is connected to a dot-pin
    		if(PR.pin.function == PIN_FUNCTION_FLAG_DOT) {
    			// check the part: is it a parameter-device?
    //			str += "** dev name [" + PR.part.device.name + "] [" + dev_parameter + "]\n";
    			if(strstr(PR.part.device.name, dev_parameter) == 0) {
    				// we need the value of that parameter
    				parameter_value = PR.part.value;
    //				str += "**  value [" + PR.part.value +"]\n";
    			}
    		} else {
    			// no clk-pin, this is no function-net
    			nodotpins++;
    			break;
    		}
    	}
    
    	// found a parameter?
    	if(nodotpins == 0 && parameter_value != "") {
    		// all the other pins are interesting now
    		N.pinrefs(PR) {
    //			str += "** dev name [" + PR.part.device.name + "] [" + dev_parameter + "]\n";
    			// this pin does not belong to the parameter-device
    			if(strstr(PR.part.device.name, dev_parameter) != 0) {
    				// name of the pin is name of the function
    				//string parameter_name = strlwr(PR.pin.name);
    				string parameter_name = strlwr(PR.instance.gate.name);
    				// if functionname starts with a '.', it will be appended to the modulename
    //				str += "** param (gate) name [" + parameter_name + "]\n";
    				if(parameter_name[0] == '.') {
    					// if the name is only a point, it will be ignored
    					if(strlen(parameter_name) == 1) {
    						parameter_name = "";
    					}
    					parameter_name = get_module_name(PR.part) + parameter_name;
    //					str += "** param (part) name [" + parameter_name + "]\n";
    				}
    				str += "setp " + parameter_name + "\t" + parameter_value + "\n";
    			}
    		}
    	}
    
    	return str;
    }
    
    // if this is a 'constant'-device, set its value
    // NOTE: this is hardcoded to use the first entry in the dev_names[] array!
    string set_constants(UL_PART P) {
    	string str = "";
    
    	// 'constant'-device?
    	if(strstr(P.device.name, dev_names[0]) == 0) {
    		str += "setp " + get_module_name(P) + ".value\t" + P.value + "\n";
    	}
    
    	return str;
    }
    
    string connect_net(UL_NET N) {
    	string str = "";
    
    	// find all neccessary net-members
    	string pins = "";
    	N.pinrefs(P) {
    		// only non-functional pins are connected
    		if(P.pin.function == PIN_FUNCTION_FLAG_NONE) {
    			string pin_name =  strlwr(P.pin.name);
    			string part_name = strlwr(P.part.name);
    			pin_name =  replace(pin_name,  '$', '_');
    			part_name = replace(part_name, '$', '_');
    			pins += part_name + "." + pin_name + " ";
    		}
    	}
    
    	if(pins != "") {
    		string net_name = strlwr(N.name);
    		net_name = replace(net_name, '$', '_');
    		str += "net " + net_name + " " + pins + "\n";
    	}
    
    	return str;
    }
    
    /*******************************************************************************
     * Main program.
     ******************************************************************************/
    // is the schematic editor running?
    if (!schematic) {
    	Error("No Schematic!<br>This program will only work in the schematic editor.");
    }
    
    schematic(S) {
    	ProjectPath = filedir(S.name);
    	ProjectName = filesetext(filename(S.name), "");
    }
    
    // build configuration
    
    string cs = "# HAL config file automatically generated by Eagle-CAD ULP:\n";
    cs += "# [" + argv[0] + "]\n";
    cs += "# (C) Martin Schoeneck.de 2008\n";
    cs += "# Mods Ed Nisley 2010\n";
    
    FileName = ProjectPath + ProjectName + ".hal";
    
    cs += "# Path        [" + ProjectPath + "]\n";
    cs += "# ProjectName [" + ProjectName + "]\n";
    
    //cs += "# File name: [" + FileName + "]\n\n";
    
    // ask for a filename: where should we write the configuration?
    
    FileName = dlgFileSave("Save Configuration", FileName, "*.hal");
    
    if(!FileName) {
    	exit(0);
    }
    
    cs += "# File name   [" + FileName + "]\n";
    cs += "# Created     [" + t2string(time(),"hh:mm:ss dd-MMM-yyyy") + "]\n\n";
    
    schematic(S) {
    	// load modules
    	cs += comment("Load realtime and userspace modules");
    	S.parts(P) {
    		cs += load_module(P);
    	}
    
    	// load blocks
    	cs += load_blocks();
    
    	// add functions
    	cs += comment("Hook functions into threads");
    	S.nets(N) {
    		cs += hook_function(N);
    	}
    
    	// set parameters
    	cs += comment("Set parameters");
    	S.nets(N) {
    		cs += set_parameter(N);
    	}
    
    	// set constant values
    	cs += comment("Set constants");
    	S.parts(P) {
    		cs += set_constants(P);
    	}
    
    	// build nets and connect them
    	cs += comment("Connect Modules with nets");
    	S.nets(N) {
    		cs += connect_net(N);
    	}
    }
    
    // open/overwrite the target file to save the configuration
    output(FileName, "wt") {
    	printf(cs);
    }
    
  • SX230HS Adapter: Main Tube and Assembly

    The main tube connects the camera mounting plate and the snout on the front, so it’s a structural element of a sort. The ID fits over the non-moving lens turret base on the camera and the inner length is a few millimeters longer than the maximum lens turret extension:

    Camera mount tube - interior
    Camera mount tube – interior

    As you might expect by now, the front bulkhead has four alignment peg holes for the snout:

    Camera mount tube
    Camera mount tube

    The OpenSCAD code sets the wall thickness to 3 thread widths, but Skeinforge prints two adjacent threads with no fill at all. I think the polygon corners eliminate the one-thread-width fill and the perimeter threads wind up near enough to merge properly.

    I assembled snouts to main tubes first, because it was easier to clamp bare cylinders to the bench:

    Microscope eyepiece adapter - snout clamping
    Microscope eyepiece adapter – snout clamping

    Then glue the tube to the mounting plate using a couple of clamps:

    Microscope eyepiece adapter - baseplate clamping
    Microscope eyepiece adapter – baseplate clamping

    The alignment is pretty close to being right, but if when I do this again I’ll add alignment pegs along the trench in the mounting plate to make sure the tube doesn’t ease slightly to one side, thusly:

    SX230HS Macro Lens mount - solid model - exploded with pegs
    SX230HS Macro Lens mount – solid model – exploded with pegs

    You can see the entrance pupil isn’t quite filled in the last picture there, so a bit more attention to detail is in order. A bigger doublet lens would help, too.

    The current version of the OpenSCAD source code with those pegs:

    // Close-up lens mount & Microscope adapter for Canon SX230HS camera
    // Ed Nisley KE4ZNU - Nov 2011
    
    Mount = "LEDRing";			// End result: LEDRing Eyepiece
    
    Layout = "Show";			// Assembly: Show
    							// Parts: Plate Tube LEDRing Camera Eyepiece
    							// Build Plates: Build1..4
    
    Gap = 10;					// between "Show" objects
    
    include </home/ed/Thing-O-Matic/lib/MCAD/units.scad>
    include </home/ed/Thing-O-Matic/Useful Sizes.scad>
    include </home/ed/Thing-O-Matic/lib/visibone_colors.scad>
    
    //-------
    //- Extrusion parameters must match reality!
    //  Print with +1 shells, 3 solid layers, 0.2 infill
    
    ThreadThick = 0.33;
    ThreadWidth = 2.0 * ThreadThick;
    
    HoleFinagle = 0.2;
    HoleFudge = 1.00;
    
    function HoleAdjust(Diameter) = HoleFudge*Diameter + HoleFinagle;
    
    Protrusion = 0.1;			// make holes end cleanly
    
    function IntegerMultiple(Size,Unit) = Unit * ceil(Size / Unit);
    
    //-------
    // Dimensions
    
    // doublet lens
    
    LensDia = 25.0;
    LensRad = LensDia/2;
    LensClearance = 0.2;
    
    LensEdge = 6.7;
    LensThick = 8.6;
    LensRimThick = IntegerMultiple((2.0 + LensThick),ThreadThick);
    
    // LED ring light
    
    LEDRingOD = 50.0;
    LEDRingID = 36.0;
    LEDBoardThick = 1.5;
    LEDThick = 4.0;
    LEDRingClearance = 0.5;
    LEDWireHoleDia = 3.0;
    
    // microscope eyepiece
    
    EyepieceOD = 30.0;
    EyepieceID = 24.0;
    EyepieceLength = 25.0;
    
    // camera
    // Origin at base of [0] ring, Z+ along lens axis, X+ toward bottom, Y+ toward left
    
    CameraBodyWidth = 2*10.6;							// 2 x center-to-curve edge
    CameraBaseWidth = 15.5;								// flat part of bottom front to back
    CameraBaseRadius = (CameraBodyWidth - CameraBaseWidth)/2;	// edge rounding
    CameraBaseLength = 60.0;							// centered on lens axis
    CameraBaseHeight = 55.0;							// main body height
    CameraBaseThick = 0.9;								// downward from lens ring
    
    echo(str("Camera base radius: ",CameraBaseRadius));
    
    TripodHoleOffset = -19.0;							// mount screw wrt lens centerline
    TripodHoleDia = Clear025_20;						// clearance hole
    
    TripodScrewHeadDia = 14.5;							// recess for screw mounting camera
    TripodScrewHeadRad = TripodScrewHeadDia/2;
    TripodScrewHeadThick = 3.0;
    
    // main lens tube
    
    TubeDia = 		[53.0,	44.0,	40.0,	37.6];		// lens rings, [0] is fixed to body
    TubeLength = 	[8.1,	20.6,	17.6,	12.7];
    
    TubeEndClearance = 2.0;								// camera lens end to tube end
    TubeEndThickness = IntegerMultiple(1.5,ThreadThick);
    TubeInnerClearance = 0.5;
    
    TubeInnerLength = TubeLength[0] + TubeLength[1] + TubeLength[2] + TubeLength[3] +
    				  TubeEndClearance;
    TubeOuterLength = TubeInnerLength + TubeEndThickness;
    
    TubeID = TubeDia[0] + TubeInnerClearance;
    TubeOD = TubeID + 6*ThreadWidth;
    TubeWall = (TubeOD - TubeID)/2;
    TubeSides = 48;
    
    echo(str("Main tube outer length: ",TubeOuterLength));
    echo(str("          ID: ",TubeID," OD: ",TubeOD," wall: ",TubeWall));
    
    // camera mounting base
    
    BaseWidth = IntegerMultiple((CameraBaseWidth + 2*CameraBaseRadius),ThreadThick);
    BaseLength = 60.0;
    BaseThick = IntegerMultiple((1.0 + Nut025_20Thick + CameraBaseThick),ThreadThick);
    
    // LED ring mount
    
    LEDBaseThick = IntegerMultiple(2.0,ThreadThick);	// base under lens + LED ring
    LEDBaseRimWidth = IntegerMultiple(6.0,ThreadWidth);
    LEDBaseRimThick = IntegerMultiple(LensThick,ThreadThick);
    
    LEDBaseOD = max((LEDRingOD + LEDRingClearance + LEDBaseRimWidth),TubeOD);
    
    echo(str("LED Ring OD: ",LEDBaseOD));
    
    // alignment pins between tube and LED ring / microscope eyepiece
    
    AlignPinOD = 2.9;
    
    SnoutPins = 4;
    SnoutPinCircleDia = TubeOD - 2*TubeWall - 2*AlignPinOD;		// 2*PinOD -> more clearance
    
    // alignment pins between tube and base plate
    
    BasePins = 2;
    BasePinOffset = 10.0;
    BasePinSpacing = BaseLength/3;
    
    //-------
    
    module PolyCyl(Dia,Height,ForceSides=0) {			// based on nophead's polyholes
    
      Sides = (ForceSides != 0) ? ForceSides : (ceil(Dia) + 2);
    
      FixDia = Dia / cos(180/Sides);
    
      cylinder(r=HoleAdjust(FixDia)/2,h=Height,$fn=Sides);
    }
    
    module ShowPegGrid(Space = 10.0,Size = 1.0) {
    
      Range = floor(50 / Space);
    
    	for (x=[-Range:Range])
    	  for (y=[-Range:Range])
    		translate([x*Space,y*Space,Size/2])
    		  %cube(Size,center=true);
    
    }
    
    //-------
    
    //- Camera body segment
    //	Including lens base and peg for tripod hole access
    //	Z=0 at edge of lens base ring, X=0 along lens axis
    
    module CameraBody() {
    
      translate([0,0,-CameraBaseThick])
    	rotate(90)
    	  union() {
    		translate([0,0,(CameraBaseHeight/2 + CameraBaseRadius)])
    		  minkowski() {
    			cube([CameraBaseWidth,
    				  (CameraBaseLength + 2*Protrusion),
    				  CameraBaseHeight],center=true);
    			rotate([90,0,0])
    			  cylinder(r=CameraBaseRadius,h=Protrusion,$fn=8);
    		  }
    
    		translate([0,0,(TubeDia[0]/2 + CameraBaseThick)])
    		  rotate([0,90,0])
    			rotate(180/TubeSides)
    			  cylinder(r=(TubeDia[0]/2 + CameraBaseThick),
    					  h=(CameraBodyWidth/2 + Protrusion),
    					  $fn=TubeSides);
    
    		translate([CameraBodyWidth/2,0,(TubeDia[0]/2 + CameraBaseThick)])
    		  rotate([0,90,0])
    			cylinder(r=TubeDia[0]/2,h=TubeLength[0]);
    
    		translate([(TubeLength[0] + CameraBodyWidth/2),
    				  0,(TubeDia[0]/2 + CameraBaseThick)])
    		  rotate([0,90,0])
    			cylinder(r=TubeDia[1]/2,h=TubeLength[1]);
    
    		translate([(TubeLength[0] + TubeLength[1] + CameraBodyWidth/2),
    				  0,(TubeDia[0]/2 + CameraBaseThick)])
    		  rotate([0,90,0])
    			cylinder(r=TubeDia[2]/2,h=TubeLength[2]);
    
    		translate([(TubeLength[0] + TubeLength[1] + TubeLength[2] + CameraBodyWidth/2),
    				  0,(TubeDia[0]/2 + CameraBaseThick)])
    		  rotate([0,90,0])
    			cylinder(r=TubeDia[3]/2,h=TubeLength[3]);
    
    		translate([0,TripodHoleOffset,-BaseThick])
    		  PolyCyl(TripodHoleDia,(BaseThick + 2*Protrusion));
    
    	  }
    }
    
    //- Main tube
    
    module Tube() {
    
      difference() {
    	cylinder(r=TubeOD/2,h=TubeOuterLength,$fn=TubeSides);
    
    	translate([0,0,TubeEndThickness])
    	  PolyCyl(TubeID,(TubeInnerLength + Protrusion),TubeSides);
    
    	translate([0,0,-Protrusion]) {
    	  if (Mount == "LEDRing")
    		cylinder(r=LensRad,h=(TubeEndThickness + 2*Protrusion));
    	  if (Mount == "Eyepiece")
    		cylinder(r=EyepieceID/2,h=(TubeEndThickness + 2*Protrusion));
    	}
    
    	for (Index = [0:SnoutPins-1])
    	  rotate(Index*90)
    		translate([(SnoutPinCircleDia/2),0,-ThreadThick])
    		  rotate(180)			// flat sides outward
    			PolyCyl(AlignPinOD,TubeEndThickness);
    
    	for (Index = [0:BasePins-1])
    		translate([0,-(TubeOD/2 + Protrusion),
    				  (TubeOuterLength - BasePinOffset - Index*BasePinSpacing)])
    		  rotate([-90,90,0])					// y = flat toward camera
    			PolyCyl(AlignPinOD,(TubeWall + 2*Protrusion));
      }
    
    }
    
    //- Base plate
    
    module BasePlate() {
    
      union() {
    	difference() {
    		linear_extrude(height=BaseThick)
    		  hull() {
    			translate([-(BaseLength/2 - BaseWidth/2),0,0])
    			  circle(BaseWidth/2);
    			translate([ (BaseLength/2 - BaseWidth/2),0,0])
    			  circle(BaseWidth/2);
    			translate([0,(0.75*BaseLength),0])
    			  circle(BaseWidth/2);
    		  }
    
    		translate([0,0,BaseThick])
    		  CameraBody();
    
    		translate([0,(TubeOuterLength + CameraBodyWidth/2),
    				  (BaseThick + TubeDia[0]/2)])
    		  rotate([90,0,0])
    			PolyCyl(TubeOD,TubeOuterLength,$fn=TubeSides);
    
    		for (Index = [0:BasePins-1])
    			translate([0,(CameraBodyWidth/2 + BasePinOffset + Index*BasePinSpacing),
    					  3*ThreadThick])
    			  rotate(90)										// flat toward camera
    				PolyCyl(AlignPinOD,BaseThick);
    
    		translate([0,0,3*ThreadThick])
    		  PolyCyl((Nut025_20Dia*sqrt(3)/2),2*Nut025_20Thick,6);	// dia across hex flats
    
    		translate([0,0,-Protrusion])
    		  PolyCyl(Clear025_20,(BaseThick + 2*Protrusion));
    
    		translate([TripodHoleOffset,0,3*ThreadThick])
    		  PolyCyl((Nut025_20Dia*sqrt(3)/2),2*Nut025_20Thick,6);	// dia across hex flats
    
    		translate([TripodHoleOffset,0,-Protrusion])
    		  PolyCyl(Clear025_20,(BaseThick + 2*Protrusion));
    
    		translate([-TripodHoleOffset,0,-Protrusion])
    		  PolyCyl(TripodScrewHeadDia,(TripodScrewHeadThick + Protrusion));
    	}
    
    	translate([-TripodHoleOffset,0,0]) {				// support for tripod screw hole
    	  for (Index=[0:3])
    		rotate(Index*45)
    		  translate([-ThreadWidth,-TripodScrewHeadRad,0])
    			cube([2*ThreadWidth,TripodScrewHeadDia,TripodScrewHeadThick]);
    
    	  cylinder(r=0.4*TripodScrewHeadRad,h=(BaseThick - CameraBaseThick),$fn=9);
    	}
      }
    }
    
    //- LED mounting ring
    
    module LEDRing() {
    
      difference() {
    	cylinder(r=LEDBaseOD/2,h=LensRimThick,$fn=48);
    
    	translate([0,0,-Protrusion])
    	  PolyCyl((LensDia + LensClearance),
    			  (LensRimThick + 2*Protrusion));
    
    	translate([0,0,LEDBaseRimThick])
    	  difference() {
    		PolyCyl(LEDBaseOD,LensThick);
    		PolyCyl(LEDRingID,LensThick);
    	  }
    
    	translate([0,0,LEDBaseThick])
    	  difference() {
    		PolyCyl((LEDRingOD + LEDRingClearance),LensThick);
    		cylinder(r1=HoleAdjust(LEDRingID - LEDRingClearance)/2,
    				 r2=HoleAdjust(LensDia + LensClearance)/2 + 2*ThreadWidth,
    				 h=LensThick);
    	  }
    
    	for (Index = [0:SnoutPins-1])
    	  rotate(Index*90)
    		translate([(SnoutPinCircleDia/2),0,-ThreadThick])
    		  rotate(180)			// flat sides outward
    			PolyCyl(AlignPinOD,LEDBaseThick);
    
    	rotate(45)
    	  translate([0,LEDRingID/2,(LEDBaseThick + 1.2*LEDWireHoleDia/2)])
    		rotate([0,-90,0])			// flat side down
    		  rotate([-90,0,0])
    			PolyCyl(LEDWireHoleDia,2*LEDBaseRimWidth);
      }
    
    }
    
    //- Microscope eyepiece adapter
    
    module EyepieceMount() {
    
      difference() {
    	cylinder(r1=TubeOD/2,
    			 r2=(EyepieceOD + 8*ThreadWidth)/2,
    			 h=EyepieceLength,
    			 $fn=TubeSides);
    
    	translate([0,0,-Protrusion])
    	  PolyCyl(EyepieceOD,(EyepieceLength + 2*Protrusion));
    
    	for (Index = [0:SnoutPins-1])
    	  rotate(Index*90)
    		translate([(SnoutPinCircleDia/2),0,-ThreadThick])
    		  rotate(180)			// flat sides outward
    			PolyCyl(AlignPinOD,6*ThreadThick);
      }
    
    }
    
    //-------
    // Build it!
    
    if (Layout != "Show")
      ShowPegGrid();
    
    if (Layout == "Tube")
      Tube();
    
    if (Layout == "LEDRing")
      LEDRing();
    
    if (Layout == "Plate")
      BasePlate();
    
    if (Layout == "Camera")
      CameraBody();
    
    if (Layout == "Eyepiece")
      EyepieceMount();
    
    if (Layout == "Build1")
      translate([0,-BaseLength/3,0])
    	BasePlate();
    
    if (Layout == "Build2")
      Tube();
    
    if (Layout == "Build3")
      LEDRing();
    
    if (Layout == "Build4")
      EyepieceMount();
    
    if (Layout == "Show") {
      translate([0,TubeOuterLength,TubeDia[0]/2]) {
    	rotate([90,0,0])
    	  color(LTC) Tube();
    	translate([0,(Gap/2 - TubeEndThickness - Protrusion),0])
    	  rotate([-90,0,0])
    		for (Index = [0:SnoutPins-1])
    		  rotate(Index*90)
    			translate([(SnoutPinCircleDia/2),0,0])
    			  rotate(180)			// flat sides outward
    				PolyCyl(AlignPinOD,(TubeEndThickness + LEDBaseThick));
    
    	translate([0,Gap,0])
    	  rotate([-90,0,0]) {
    		if (Mount == "LEDRing")
    		  color(OOR) LEDRing();
    		if (Mount == "Eyepiece")
    		  color(OOR) EyepieceMount();
    	  }
      }
    
      translate([0,-CameraBodyWidth/2,0])
    	color(PG) CameraBody();
    
      color(PDA)
    	render()
    	translate([0,-CameraBodyWidth/2,-(BaseThick + Gap)])
    	  BasePlate();
    
      for (Index = [0:BasePins-1])
    	  translate([0,(BasePinOffset + Index*BasePinSpacing),
    				-Gap/2])
    		rotate([180,0,90])										// flat toward camera
    		  PolyCyl(AlignPinOD,BaseThick/2);
    
    }
    
  • EMC2 Logitech GamePad: Triggger Button Name Change

    I just updated EMC2 on the Sherline CNC mill from 2.4.6 to 2.4.7 (which mis-identifies itself as 2.4.6 on the splash screen) and the Axis UI failed to start. A bit of digging shows that the name of Button 1 (the left button in the right-hand quad, clearly labeled 1) has inexplicably changed from btn-trigger to btn-joystick.

    Logitech Gamepad Pendant
    Logitech Gamepad Pendant

    Most likely the change has nothing to do with EMC2, because (I think) those names bubble up from the HID driver that actually talks to the hardware and that stuff has also been updated; this is all on Ubuntu 10.04 LTS. But in any event, the name is now different.

    That requires a tweak to the Eagle schematics, which will regenerate Logitech_Gamepad.hal, but you can just edit the latter file and change btn-trigger to btn-joystick.

    As nearly as I can tell, changing the pin name in the Logitech library component, saving the library, then updating the library in the schematic doesn’t do squat. Evidently, Eagle keeps track of which components you’ve used and won’t update them unless you do some manual gymnatistics, which makes a certain amount of sense.

    That means one must:

    • Delete both “gates” of the old component (INPUT.0.BUTTONS first, then INPUT.0)
    • Make sure you’re on Page 2 where the basic gate will go
    • Add the revised LOGITECH_DUAL_ACTION_GAMEPAD to get the INPUT.1 “gate”
    • Rename it to INPUT.0
    • Use Move to jiggle it around a bit to ensure its pins get hitched up to the existing nets
    • Switch to Page 1 where the button nets lie in wait
    • Type invoke input.0 into the Eagle command line
    • Pick -BUTTONS from the list to select that “gate”
    • Position that gate appropriately
    • Use Move to jiggle the gate
    • Save everything
    • Run the Eagle2Hal ULP to get a new HAL output file
    • Put that file where it’ll do the most good

    There, now, wasn’t that obvious?

    The modified Logitech_Gamepad.hal file:

    # HAL config file automatically generated by Eagle-CAD ULP:
    # [/mnt/bulkdata/Project Files/eagle/ulp/hal-write-2.4.ulp]
    # (C) Martin Schoeneck.de 2008
    # Mods Ed Nisley 2010
    # Path        [/mnt/bulkdata/Project Files/eagle/projects/EMC2 HAL Configuration/]
    # ProjectName [Logitech Gamepad - 2.4.7]
    # File name   [/mnt/bulkdata/Project Files/eagle/projects/EMC2 HAL Configuration/Logitech Gamepad - 2.4.7.hal]
    # Created     [10:40:31 11-Nov-2011]
    
    ####################################################
    # Load realtime and userspace modules
    loadrt constant		count=16
    loadrt and2		count=17
    loadrt flipflop		count=4
    loadrt mux2		count=5
    loadrt mux4		count=1
    loadrt not		count=8
    loadrt or2		count=10
    loadrt scale		count=7
    loadrt timedelay		count=1
    loadrt toggle		count=1
    loadrt wcomp		count=6
    
    ####################################################
    # Hook functions into threads
    addf toggle.0		servo-thread
    addf wcomp.1		servo-thread
    addf wcomp.2		servo-thread
    addf wcomp.3		servo-thread
    addf and2.0		servo-thread
    addf and2.4		servo-thread
    addf and2.3		servo-thread
    addf and2.2		servo-thread
    addf and2.1		servo-thread
    addf constant.6		servo-thread
    addf constant.5		servo-thread
    addf constant.4		servo-thread
    addf constant.3		servo-thread
    addf constant.2		servo-thread
    addf constant.1		servo-thread
    addf constant.0		servo-thread
    addf constant.7		servo-thread
    addf constant.8		servo-thread
    addf scale.1		servo-thread
    addf scale.2		servo-thread
    addf scale.3		servo-thread
    addf mux4.0		servo-thread
    addf mux2.0		servo-thread
    addf scale.4		servo-thread
    addf scale.0		servo-thread
    addf wcomp.5		servo-thread
    addf wcomp.4		servo-thread
    addf wcomp.0		servo-thread
    addf flipflop.1		servo-thread
    addf flipflop.0		servo-thread
    addf and2.5		servo-thread
    addf and2.6		servo-thread
    addf and2.7		servo-thread
    addf and2.8		servo-thread
    addf flipflop.2		servo-thread
    addf flipflop.3		servo-thread
    addf or2.4		servo-thread
    addf or2.8		servo-thread
    addf or2.7		servo-thread
    addf or2.6		servo-thread
    addf or2.5		servo-thread
    addf or2.3		servo-thread
    addf or2.2		servo-thread
    addf or2.1		servo-thread
    addf or2.0		servo-thread
    addf not.1		servo-thread
    addf not.2		servo-thread
    addf not.3		servo-thread
    addf not.4		servo-thread
    addf not.5		servo-thread
    addf not.6		servo-thread
    addf not.7		servo-thread
    addf not.0		servo-thread
    addf constant.9		servo-thread
    addf mux2.1		servo-thread
    addf mux2.2		servo-thread
    addf mux2.3		servo-thread
    addf mux2.4		servo-thread
    addf constant.10		servo-thread
    addf constant.11		servo-thread
    addf scale.5		servo-thread
    addf scale.6		servo-thread
    addf constant.12		servo-thread
    addf constant.13		servo-thread
    addf timedelay.0		servo-thread
    addf constant.14		servo-thread
    addf constant.15		servo-thread
    addf and2.16		servo-thread
    addf and2.15		servo-thread
    addf and2.14		servo-thread
    addf and2.13		servo-thread
    addf and2.12		servo-thread
    addf and2.11		servo-thread
    addf and2.10		servo-thread
    addf and2.9		servo-thread
    addf or2.9		servo-thread
    
    ####################################################
    # Set parameters
    
    ####################################################
    # Set constants
    setp constant.0.value	+0.02
    setp constant.1.value	-0.02
    setp constant.2.value	60
    setp constant.3.value	1.00
    setp constant.4.value	0.10
    setp constant.5.value	0.50
    setp constant.6.value	0.10
    setp constant.7.value	+0.5
    setp constant.8.value	-0.5
    setp constant.9.value	0.0
    setp constant.10.value	[TRAJ]MAX_LINEAR_VELOCITY
    setp constant.11.value	[TRAJ]MAX_ANGULAR_VELOCITY
    setp constant.12.value	-1.0
    setp constant.13.value	0.1
    setp constant.14.value	0.020
    setp constant.15.value	0.000
    
    ####################################################
    # Connect Modules with nets
    net a-button-minus or2.2.in0 input.0.btn-joystick and2.15.in0
    net a-button-plus or2.2.in1 input.0.btn-thumb2 and2.16.in0
    net a-buttons-active or2.2.out or2.3.in0 or2.4.in1
    net a-disable not.7.out and2.5.in1
    net a-enable or2.4.in0 flipflop.3.out not.7.in mux2.4.sel
    net a-jog wcomp.2.in input.0.abs-z-position mux2.4.in1
    net a-knob-active not.2.out and2.7.in1
    net a-knob-inactive wcomp.2.out not.2.in and2.6.in1
    net a-select and2.8.in0 and2.7.out
    net a-set flipflop.3.set and2.8.out
    net angular_motion or2.4.out mux2.0.sel
    net any-buttons-active mux4.0.sel0 or2.8.out
    net az-buttons-active or2.3.out or2.8.in1 or2.9.in0
    net az-reset flipflop.2.reset and2.6.out flipflop.3.reset
    net button-crawl scale.4.out mux4.0.in3
    net button-fast scale.2.out mux4.0.in1 scale.4.in
    net jog-crawl toggle.0.out mux4.0.sel1
    net jog-speed halui.jog-speed mux4.0.out
    net knob-crawl mux4.0.in2 scale.3.out
    net knob-fast mux4.0.in0 scale.1.out scale.3.in
    net n_1 constant.10.out mux2.0.in0
    net n_2 and2.0.in0 input.0.btn-top2
    net n_3 and2.0.in1 input.0.btn-base
    net n_4 and2.0.out halui.abort
    net n_5 halui.mode.manual input.0.btn-base3
    net n_6 wcomp.0.max wcomp.1.max wcomp.2.max wcomp.3.max constant.0.out
    net n_7 halui.program.resume input.0.btn-base4
    net n_8 wcomp.0.min wcomp.1.min wcomp.2.min wcomp.3.min constant.1.out
    net n_9 mux2.0.in1 constant.11.out
    net n_10 constant.12.out scale.5.gain scale.6.gain
    net n_11 or2.0.in0 input.0.btn-base5
    net n_12 or2.0.in1 input.0.btn-base6
    net n_13 constant.9.out mux2.1.in0 mux2.2.in0 mux2.3.in0 mux2.4.in0
    net n_14 mux2.1.out halui.jog.0.analog
    net n_15 toggle.0.in or2.0.out
    net n_16 constant.2.out scale.0.gain
    net n_17 constant.5.out scale.1.gain
    net n_18 constant.3.out scale.2.gain
    net n_19 constant.4.out scale.3.gain
    net n_20 scale.4.gain constant.6.out
    net n_21 halui.jog.1.analog mux2.2.out
    net n_22 mux2.2.in1 scale.5.out
    net n_23 scale.6.out mux2.3.in1
    net n_24 constant.13.out halui.jog-deadband
    net n_25 wcomp.4.max constant.7.out wcomp.5.max
    net n_26 constant.8.out wcomp.4.min wcomp.5.min
    net n_27 mux2.3.out halui.jog.2.analog
    net n_28 halui.jog.3.analog mux2.4.out
    net n_29 timedelay.0.out and2.9.in1 and2.10.in1 and2.12.in1 and2.11.in1 and2.13.in1 and2.14.in1 and2.16.in1 and2.15.in1
    net n_30 and2.9.out halui.jog.0.minus
    net n_31 or2.9.out timedelay.0.in
    net n_32 constant.14.out timedelay.0.on-delay
    net n_33 constant.15.out timedelay.0.off-delay
    net n_34 and2.10.out halui.jog.0.plus
    net n_35 and2.11.out halui.jog.1.minus
    net n_36 halui.jog.1.plus and2.12.out
    net n_37 and2.13.out halui.jog.2.minus
    net n_38 and2.14.out halui.jog.2.plus
    net n_39 and2.15.out halui.jog.3.minus
    net n_40 and2.16.out halui.jog.3.plus
    net vel-per-minute scale.0.out scale.1.in scale.2.in
    net vel-per-second mux2.0.out scale.0.in
    net x-buttons-active or2.7.in0 or2.5.out
    net x-disable not.4.out and2.4.in1
    net x-enable not.4.in flipflop.0.out mux2.1.sel
    net x-hat-jog wcomp.4.in input.0.abs-hat0x-position
    net x-hat-minus wcomp.4.under or2.5.in1 and2.9.in0
    net x-hat-plus or2.5.in0 wcomp.4.over and2.10.in0
    net x-jog wcomp.0.in input.0.abs-x-position mux2.1.in1
    net x-knob-active not.0.out and2.1.in0
    net x-knob-inactive wcomp.0.out not.0.in and2.2.in0 and2.3.in0
    net x-set and2.1.out flipflop.0.set
    net xy-buttons-active or2.7.out or2.8.in0 or2.9.in1
    net xy-reset flipflop.0.reset and2.2.out flipflop.1.reset
    net y-buttons-active or2.6.out or2.7.in1
    net y-disable not.5.out and2.1.in1
    net y-enable flipflop.1.out not.5.in mux2.2.sel
    net y-hat-jog wcomp.5.in input.0.abs-hat0y-position
    net y-hat-minus wcomp.5.under or2.6.in1 and2.12.in0
    net y-hat-plus or2.6.in0 wcomp.5.over and2.11.in0
    net y-jog wcomp.1.in input.0.abs-y-position scale.5.in
    net y-knob-active not.1.out and2.3.in1
    net y-knob-inactive not.1.in wcomp.1.out and2.2.in1
    net y-select and2.4.in0 and2.3.out
    net y-set flipflop.1.set and2.4.out
    net z-button-minus or2.1.in0 input.0.btn-thumb and2.13.in0
    net z-button-plus or2.1.in1 input.0.btn-top and2.14.in0
    net z-buttons-active or2.1.out or2.3.in1
    net z-disable not.6.out and2.8.in1
    net z-enable not.6.in flipflop.2.out mux2.3.sel
    net z-jog wcomp.3.in input.0.abs-rz-position scale.6.in
    net z-knob-active not.3.out and2.5.in0
    net z-knob-inactive not.3.in wcomp.3.out and2.7.in0 and2.6.in0
    net z-set and2.5.out flipflop.2.set
    
  • OpenSCAD: Useful Sizes file

    My Useful Sizes.scad file has been accumulating the dimensions of nuts & bolts & a motor that don’t (seem to) appear elsewhere in the OpenSCAD universe:

    //-- Useful sizes
    
    Tap2_56 = 0.070 * inch;
    Clear2_56 = 0.082 * inch;
    Head2_56 = 0.156 * inch;
    Head2_56Thick = 0.055 * inch;
    Nut2_56Dia = 0.204 * inch;
    Nut2_56Thick = 0.065 * inch;
    
    Tap3_48 = 0.079 * inch;
    Clear3_48 = 0.096 * inch;
    Head3_48 = 0.184 * inch;
    Head3_48Thick = 0.058 * inch;
    Nut3_48Dia = 0.201 * inch;
    Nut3_48Thick = 0.073 * inch;
    
    Tap4_40 = 0.089 * inch;
    Clear4_40 = 0.110 * inch;
    Head4_40 = 0.211 * inch;
    Head4_40Thick = 0.065 * inch;
    Nut4_40Dia = 0.228 * inch;
    Nut4_40Thick = 0.086 * inch;
    
    Tap10_32 = 0.159 * inch;
    Clear10_32 = 0.190 * inch;
    Head10_32 = 0.373 * inch;
    Head10_32Thick = 0.110 * inch;
    Nut10_32Dia = 0.433 * inch;
    Nut10_32Thick = 0.130 * inch;
    
    Tap025_20 = 0.201 * inch;
    Clear025_20 = 0.2660 * inch;
    Head025_20 = 0.492 * inch;
    Head025_20Thick = 0.144 * inch;
    Nut025_20Dia = 0.505 *inch;
    Nut025_20Thick = 0.161 * inch;
    
    NEMA17_ShaftDia = 5.0;
    NEMA17_ShaftLength = 24.0;
    NEMA17_PilotDia = 0.866 * inch;
    NEMA17_PilotLength = 0.080 * inch;
    NEMA17_BCD = 1.725 * inch;
    NEMA17_BoltDia = 3.5;
    NEMA17_BoltOC = 1.220 * inch;
    

    It seems I’m among the few CamelCase holdouts…

  • LTSpice IV: Simulation Run Hotkey

    For some odd reason, Linear Tech’s LTSpice IV simulator has a hotkey to stop a simulation (Ctrl-H), but not one to start the run.

    Add one:

    • Control Panel
    • Drafting Options
    • Hot Keys button
    • Click in Run Simulation slot
    • Tap the ~ key
    • Back out of everything
    LTSPice Run key binding
    LTSPice Run key binding

    Done!

  • VLC Startup Settings: Audio Sync

    While thrashing around with that DVD player, I finally figured out that VLC stores its configuration settings in ~/.config/vlc/vlcrc. I don’t know if it’s supposed to update that file automagically after twiddling the GUI config settings, but it doesn’t; I must manually edit the file to get a sticky change.

    Anyhow, the vital setting for that particular drive turns out to be audio synchronization, as set by the audio-desync parameter. The audio must lag the video by 400 ms, thusly:

    # Audio desynchronization compensation (integer)
    audio-desync=-400
    

    And then it Just Works…

  • Ubuntu 11.10 vs. Epson R380 Printer: FAIL

    After getting everything configured, I hauled the Atom to the Basement Laboratory Computational Center, set the IP address, brought it up as the new file server, backed up the changed files, and everything worked fine. Then I plugged in all three printers, lit up the CUPS configuration screen, and configured the, uh-oh, two printers it could find.

    Turns out that the Epson R380 printer, being a member of the Epson R300 series of printers, doesn’t work with the USB subsystem in Ubuntu 11.10, for reasons that’ll surely get sorted out in a few months. Until then, it’s a showstopper for me.

    So I shut everything down, yanked out the Atom, plugged in the old AMD box, reconnected everything, restored the changed files from backup, and we’re back to where we were a few days ago. I’ll swap in the old drive and slide the Atom underneath the Thing-O-Matic again.

    Drat!