void MatrixDriver::init()
{
// set all decoder lines as output and set them to LOW
DEC_DDR |= _BV(DEC_A0) | _BV(DEC_A1) | _BV(DEC_A2) | _BV(DEC_E3);
DEC_PORT &=~ (_BV(DEC_A0) | _BV(DEC_A1) | _BV(DEC_A2) | _BV(DEC_E3));
// set all driver lines as output and set them to LOW
MY9221_DDR |= _BV(MY9221_DI) | _BV(MY9221_DCKI);
MY9221_PORT &=~ (_BV(MY9221_DI) | _BV(MY9221_DCKI));
// init the line counter
m_currentLine = 0;
// use timer1 to create a task which gets called every 100us
cli();//stop interrupts
// Register | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
//----------+--------+--------+--------+--------+--------+--------+--------+------
// TCCR1A | COM1A1 | COM1A0 | COM1B1 | COM1B0 | - | - | WGM11 | WGM10
// | 0 | 0 | 0 | 0 | - | - | 0 | 0
// TCCR1B | ICNC1 | ICES1 | - | WGM13 | WGM12 | CS12 | CS11 | CS10
// | - | - | - | 0 | 1 | 0 | 0 | 1
// All COM registers are set to 0, because we don't want a pwm output on a pin
// CTC, TOP = OCR1A
// >> WGM 13, 12, 11, 10: 0, 1, 0, 0
// ICNC1 and ICES1 can be ignored, because no external clock source is used
// No Prescaling
// CS 12, 11, 10: 0, 0, 1
// For more details see chapter 20.14 of Atmega328 datasheet
_SFR_BYTE(TCCR1A) = 0;
_SFR_BYTE(TCCR1B) = _BV(WGM12) | _BV(CS10);
_SFR_BYTE(TIMSK1) |= _BV(OCIE1A);
OCR1A = 20000;
sei();//allow interrupts
}
void xbox_init(bool watchdog) {
uchar i;
// disable timer 0 overflow interrupt (enabled by Arduino's init() function).
// PS3 was having difficulties detecting the adapter if that's enabled.
// WARNING: This will mess up with micros(), millis() and delay() Arduino functions!
// Use alternate timer functions instead!
#if defined(TIMSK) && defined(TOIE0)
(_SFR_BYTE(TIMSK) &= ~_BV(TOIE0));
#elif defined(TIMSK0) && defined(TOIE0)
(_SFR_BYTE(TIMSK0) &= ~_BV(TOIE0));
#endif
xbox_reset_pad_status();
if(watchdog) {
wdt_enable(WDTO_2S);
} else {
wdt_disable();
}
/* Even if you don't use the watchdog, turn it off here. On newer devices,
* the status of the watchdog (on/off, period) is PRESERVED OVER RESET!
*/
/* RESET status: all port bits are inputs without pull-up.
* That's the way we need D+ and D-. Therefore we don't need any
* additional hardware initialization.
*/
usbInit();
usbDeviceDisconnect(); /* enforce re-enumeration, do this while interrupts are disabled! */
i = 0;
while (--i) { /* fake USB disconnect for > 250 ms */
wdt_reset();
_delay_ms(1);
}
usbDeviceConnect();
sei();
}
void shiftDmxOut(int pin, int theByte)
{
int port_to_output[] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(PORTB),
_SFR_IO_ADDR(PORTC),
_SFR_IO_ADDR(PORTD)
};
int portNumber = port_to_output[digitalPinToPort(pin)];
int pinMask = digitalPinToBitMask(pin);
// the first thing we do is to write te pin to high
// it will be the mark between bytes. It may be also
// high from before
_SFR_BYTE(_SFR_IO8(portNumber)) |= pinMask;
delayMicroseconds(10);
// disable interrupts, otherwise the timer 0 overflow interrupt that
// tracks milliseconds will make us delay longer than we want.
cli();
// DMX starts with a start-bit that must always be zero
_SFR_BYTE(_SFR_IO8(portNumber)) &= ~pinMask;
// we need a delay of 4us (then one bit is transfered)
// this seems more stable then using delayMicroseconds
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
for (int i = 0; i < 8; i++)
{
if (theByte & 01)
{
_SFR_BYTE(_SFR_IO8(portNumber)) |= pinMask;
}
else
{
_SFR_BYTE(_SFR_IO8(portNumber)) &= ~pinMask;
}
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
theByte >>= 1;
}
// the last thing we do is to write the pin to high
// it will be the mark between bytes. (this break is have to be between 8 us and 1 sec)
_SFR_BYTE(_SFR_IO8(portNumber)) |= pinMask;
// reenable interrupts.
sei();
}
