//read mouse bits 16 to 31
//spec requires a 2.5ms delay between the two 16bits chunks
//but the mouse works fine without it.
void ReadMouseExtendedData(){
//read the extended bits. Applies only if the mouse is plugged.
//if bit 15 of standard word is 1, a mouse is plugged.
unsigned int p1ButtonsHi=0,p2ButtonsHi=0;
unsigned char i;
if(joypad1_status_lo&(1<<15) || joypad2_status_lo&(1<<15)){
//WaitUs(1);
for(i=0;i<16;i++){
p1ButtonsHi<<=1;
p2ButtonsHi<<=1;
//pulse clock pin
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_CLOCK_PIN));
Wait200ns();
Wait200ns();
if((JOYPAD_IN_PORT&(1<<JOYPAD_DATA1_PIN))==0) p1ButtonsHi|=1;
if((JOYPAD_IN_PORT&(1<<JOYPAD_DATA2_PIN))==0) p2ButtonsHi|=1;
JOYPAD_OUT_PORT|=_BV(JOYPAD_CLOCK_PIN);
WaitUs(5);
}
joypad1_status_hi=p1ButtonsHi;
joypad2_status_hi=p2ButtonsHi;
}
}
u8 GetKey(u8 command){
static u8 state=0;
u8 data=0;
unsigned char i;
if(state==0){
//ready to transmit condition
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_CLOCK_PIN));
JOYPAD_OUT_PORT|=_BV(JOYPAD_LATCH_PIN);
Wait200ns();
Wait200ns();
Wait200ns();
Wait200ns();
Wait200ns();
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_LATCH_PIN));
JOYPAD_OUT_PORT|=_BV(JOYPAD_CLOCK_PIN);
Wait200ns();
Wait200ns();
Wait200ns();
Wait200ns();
Wait200ns();
if(command==KB_SEND_END){
state=0;
}else{
state=1;
}
}
//read button states
for(i=0;i<8;i++){
data<<=1;
//data out
if(command&0x80){
JOYPAD_OUT_PORT|=_BV(JOYPAD_LATCH_PIN);
}else{
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_LATCH_PIN));
}
//pulse clock pin
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_CLOCK_PIN));
command<<=1;
Wait100ns();
if((JOYPAD_IN_PORT&(1<<JOYPAD_DATA2_PIN))!=0) data|=1;
JOYPAD_OUT_PORT|=_BV(JOYPAD_CLOCK_PIN);
}
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_LATCH_PIN));
return data;
}
void ReadButtons(){
unsigned int p1ButtonsLo=0,p2ButtonsLo=0;
unsigned char i;
//latch controllers
JOYPAD_OUT_PORT|=_BV(JOYPAD_LATCH_PIN);
#if SNES_MOUSE == 1
if(snesMouseEnabled){
WaitUs(1);
}else{
Wait200ns();
Wait200ns();
}
#else
Wait200ns();
Wait200ns();
#endif
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_LATCH_PIN));
//read button states
for(i=0;i<16;i++){
p1ButtonsLo>>=1;
p2ButtonsLo>>=1;
#if SNES_MOUSE == 1
if(snesMouseEnabled){
WaitUs(5);
}else{
Wait200ns();
Wait200ns();
}
#else
Wait200ns();
Wait200ns();
#endif
//pulse clock pin
JOYPAD_OUT_PORT&=~(_BV(JOYPAD_CLOCK_PIN));
if((JOYPAD_IN_PORT&(1<<JOYPAD_DATA1_PIN))==0) p1ButtonsLo|=(1<<15);
if((JOYPAD_IN_PORT&(1<<JOYPAD_DATA2_PIN))==0) p2ButtonsLo|=(1<<15);
JOYPAD_OUT_PORT|=_BV(JOYPAD_CLOCK_PIN);
#if SNES_MOUSE == 1
if(snesMouseEnabled){
WaitUs(5);
}else{
Wait200ns();
Wait200ns();
}
#else
Wait200ns();
Wait200ns();
#endif
}
#if JOYSTICK==TYPE_SNES
joypad1_status_lo=p1ButtonsLo;
joypad2_status_lo=p2ButtonsLo;
#else
joypad1_status_lo=p1ButtonsLo&0xff;
joypad2_status_lo=p2ButtonsLo&0xff;
#endif
if(joypad1_status_lo==(BTN_START+BTN_SELECT+BTN_Y+BTN_B) || joypad2_status_lo==(BTN_START+BTN_SELECT+BTN_Y+BTN_B)){
SoftReset();
}
}
