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Reorder NES buttons

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This commit is contained in:
Raphaël Assénat 2016-06-06 02:42:04 +00:00
parent 9be75d17a1
commit af1d72f0d1
1 changed files with 15 additions and 3 deletions
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18
fournsnes.c
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@ -1,7 +1,7 @@
/* Name: fournsnes.c
* Project: Multiple NES/SNES to USB converter
* Author: Raphael Assenat <raph@raphnet.net>
* Copyright: (C) 2007-2012 Raphael Assenat <raph@raphnet.net>
* Copyright: (C) 2007-2016 Raphael Assenat <raph@raphnet.net>
* License: GPLv2
* Tabsize: 4
*/
@ -508,6 +508,18 @@ static char getY(unsigned char nesByte1)
return y;
}
/* Move the bits around so that identical NES and SNES buttons
* use the same USB button IDs. */
static unsigned char nesReorderButtons(unsigned char raw)
{
unsigned char v;
v = (raw & 0x80) >> 3;
v |= (raw & 0x40) >> 6;
v |= (raw & 0x20) >> 3;
v |= (raw & 0x10) >> 1;
return v;
}
static unsigned char snesReorderButtons(unsigned char bytes[2])
{
unsigned char v;
@ -563,7 +575,7 @@ static char fournsnesBuildReport(unsigned char *reportBuffer, char id)
reportBuffer[0]=id;
reportBuffer[1]=getX(last_read_controller_bytes[idx]);
reportBuffer[2]=getY(last_read_controller_bytes[idx]);
reportBuffer[3] = last_read_controller_bytes[idx] & 0xf0;
reportBuffer[3] = nesReorderButtons(last_read_controller_bytes[idx]);
}
last_reported_controller_bytes[idx] = last_read_controller_bytes[idx];
@ -579,7 +591,7 @@ static char fournsnesBuildReport(unsigned char *reportBuffer, char id)
reportBuffer[2]=getY(last_read_controller_bytes[idx*2]);
if (nesMode & (0x01<<idx))
reportBuffer[3] = last_read_controller_bytes[idx*2] & 0xf0;
reportBuffer[3] = nesReorderButtons(last_read_controller_bytes[idx*2]);
else
reportBuffer[3] = snesReorderButtons(&last_read_controller_bytes[idx*2]);
}