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Fixed a bug that was preventing driving controllers on the Stelladaptor to coexist peacefully with other PC inputs. Also corrected the driving controller movement drection for the Stelladaptor. 

git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@1416 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
estolberg 2008-03-03 16:27:16 +00:00
parent 3fde38a1b0
commit 9e23fa3c72
2 changed files with 32 additions and 16 deletions
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27
stella/src/emucore/Driving.cxx
View File

@ -13,7 +13,7 @@
// See the file "license" for information on usage and redistribution of
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
//
// $Id: Driving.cxx,v 1.15 2008-03-02 19:20:50 stephena Exp $
// $Id: Driving.cxx,v 1.16 2008-03-03 16:27:16 estolberg Exp $
//============================================================================
#include "Event.hxx"
@ -58,7 +58,9 @@ Driving::~Driving()
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void Driving::update()
{
int grayIndex = 0;
// Make sure direct gray codes from Stelladaptor stay in sync with
// simulated gray codes generated by PC keyboard or PC joystick
myCounter = (myGrayIndex << 2) | (myCounter & 3);
// Digital events (from keyboard or joystick hats & buttons)
myDigitalPinState[Six] = (myEvent.get(myFireEvent) == 0);
@ -69,24 +71,31 @@ void Driving::update()
// Only consider the lower-most bits (corresponding to pins 1 & 2)
myCounter &= 0x0f;
grayIndex = myCounter >> 2;
myGrayIndex = myCounter >> 2;
// Stelladaptor is the only controller that should set this
int yaxis = myEvent.get(myYAxisValue);
// Only overwrite gray code when Stelladaptor input has changed
// (that means real changes, not just analog signal jitter)
if((yaxis < (myLastYaxis - 1024)) || (yaxis > (myLastYaxis + 1024)))
{
myLastYaxis = yaxis;
if(yaxis <= -16384-4096)
grayIndex = 2;
myGrayIndex = 3; // up
else if(yaxis > 16384+4096)
grayIndex = 1;
myGrayIndex = 1; // down
else if(yaxis >= 16384-4096)
grayIndex = 0;
else if(yaxis < -16384+4096)
grayIndex = 3;
myGrayIndex = 2; // up + down
else if(yaxis < 16384-4096)
myGrayIndex = 0; // no movement
}
// Gray codes for rotation
static const uInt8 graytable[] = { 0x03, 0x01, 0x00, 0x02 };
// Determine which bits are set
uInt8 gray = graytable[grayIndex];
uInt8 gray = graytable[myGrayIndex];
myDigitalPinState[One] = (gray & 0x1) != 0;
myDigitalPinState[Two] = (gray & 0x2) != 0;
}

11
stella/src/emucore/Driving.hxx
View File

@ -13,7 +13,7 @@
// See the file "license" for information on usage and redistribution of
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
//
// $Id: Driving.hxx,v 1.9 2008-03-02 19:20:50 stephena Exp $
// $Id: Driving.hxx,v 1.10 2008-03-03 16:27:16 estolberg Exp $
//============================================================================
#ifndef DRIVING_HXX
@ -27,7 +27,7 @@
The standard Atari 2600 Indy 500 driving controller.
@author Bradford W. Mott
@version $Id: Driving.hxx,v 1.9 2008-03-02 19:20:50 stephena Exp $
@version $Id: Driving.hxx,v 1.10 2008-03-03 16:27:16 estolberg Exp $
*/
class Driving : public Controller
{
@ -57,6 +57,13 @@ class Driving : public Controller
// Counter to iterate through the gray codes
uInt32 myCounter;
// Index into the gray code table
uInt32 myGrayIndex;
// Y axis value from last yaxis event that was used to generate a new
// gray code
int myLastYaxis;
// Pre-compute the events we care about based on given port
// This will eliminate test for left or right port in update()
Event::Type myCWEvent, myCCWEvent, myFireEvent, myXAxisValue, myYAxisValue;