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cpu_map_atmega328p.h
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#ifdef GRBL_PLATFORM
#error "cpu_map already defined: GRBL_PLATFORM=" GRBL_PLATFORM
#endif
#error "Not Supported"
#define GRBL_PLATFORM "Atmega328p"
// Define serial port pins and interrupt vectors.
#define SERIAL_RX USART_RX_vect
#define SERIAL_UDRE USART_UDRE_vect
// Define step pulse output pins. NOTE: All step bit pins must be on the same port.
#define STEP_DDR DDRD
#define STEP_PORT PORTD
#define X_STEP_BIT 2 // Uno Digital Pin 2
#define Y_STEP_BIT 3 // Uno Digital Pin 3
#define Z_STEP_BIT 4 // Uno Digital Pin 4
#define STEP_MASK ((1<<X_STEP_BIT)|(1<<Y_STEP_BIT)|(1<<Z_STEP_BIT)) // All step bits
// Define step direction output pins. NOTE: All direction pins must be on the same port.
#define DIRECTION_DDR DDRD
#define DIRECTION_PORT PORTD
#define X_DIRECTION_BIT 5 // Uno Digital Pin 5
#define Y_DIRECTION_BIT 6 // Uno Digital Pin 6
#define Z_DIRECTION_BIT 7 // Uno Digital Pin 7
#define DIRECTION_MASK ((1<<X_DIRECTION_BIT)|(1<<Y_DIRECTION_BIT)|(1<<Z_DIRECTION_BIT)) // All direction bits
// Define stepper driver enable/disable output pin.
#define STEPPERS_DISABLE_DDR DDRB
#define STEPPERS_DISABLE_PORT PORTB
#define STEPPERS_DISABLE_BIT 0 // Uno Digital Pin 8
#define STEPPERS_DISABLE_MASK (1<<STEPPERS_DISABLE_BIT)
// Define homing/hard limit switch input pins and limit interrupt vectors.
// NOTE: All limit bit pins must be on the same port
#define LIMIT_DDR DDRB
#define LIMIT_PIN PINB
#define LIMIT_PORT PORTB
#define X_LIMIT_BIT 1 // Uno Digital Pin 9
#define Y_LIMIT_BIT 2 // Uno Digital Pin 10
#ifdef VARIABLE_SPINDLE // Z Limit pin and spindle enabled swapped to access hardware PWM on Pin 11.
#define Z_LIMIT_BIT 4 // Uno Digital Pin 12
#else
#define Z_LIMIT_BIT 3 // Uno Digital Pin 11
#endif
#define LIMIT_MASK ((1<<X_LIMIT_BIT)|(1<<Y_LIMIT_BIT)|(1<<Z_LIMIT_BIT)) // All limit bits
#define HARDSTOP_MASK ((1<<X_LIMIT_BIT)|(1<<Y_LIMIT_BIT)|(1<<Z_LIMIT_BIT)) // All true hardstops
#define LIMIT_BIT_SHIFT -1 //shift limit pins 1 left to align w/ step bits.
// won't work with variable spindle, unless we move limits to 10,11,12 and
// put spindle on pwm 9, leave dir on 13. (then shift=0)
#define LIMIT_ICR PCICR //enables change interrupts
#define LIMIT_INT (1<<PCIE0) //port to monitor
#define LIMIT_PCMSK PCMSK0 //Pin change selector
#define LIMIT_ENABLE LIMIT_MASK
#define LIMIT_INT_vect PCINT0_vect //change handler
#define TIMING_DDR DDRB
#define TIMING_PORT PORTB
#define TIMING_ENABLE_BIT 5 //Uno Digital Pin 13
#define TIMING_MASK (1<<TIMING_ENABLE_BIT) // LED
#define CNC_CONFIGURATION
// Define spindle enable and spindle direction output pins.
#define SPINDLE_ENABLE_DDR DDRB
#define SPINDLE_ENABLE_PORT PORTB
#ifdef VARIABLE_SPINDLE // Z Limit pin and spindle enabled swapped to access hardware PWM on Pin 11.
#define SPINDLE_ENABLE_BIT 3 // Uno Digital Pin 11
#else
#define SPINDLE_ENABLE_BIT 4 // Uno Digital Pin 12
#endif
#define SPINDLE_DIRECTION_DDR DDRB
#define SPINDLE_DIRECTION_PORT PORTB
#define SPINDLE_DIRECTION_BIT 5 // Uno Digital Pin 13 (NOTE: D13 can't be pulled-high input due to LED.)
// Define user-control pinouts (cycle start, reset, feed hold) input pins.
// NOTE: All pinouts pins must be on the same port and not on a port with other input pins (limits).
#define PINOUT_DDR DDRC
#define PINOUT_PIN PINC
#define PINOUT_PORT PORTC
#define PIN_RESET 0 // Uno Analog Pin 0
#define PIN_FEED_HOLD 1 // Uno Analog Pin 1
#define PIN_CYCLE_START 2 // Uno Analog Pin 2
#define PINOUT_INT PCIE1 // Pin change interrupt enable pin
#define PINOUT_INT_vect PCINT1_vect
#define PINOUT_PCMSK PCMSK1 // Pin change interrupt register
#define PINOUT_MASK ((1<<PIN_RESET)|(1<<PIN_FEED_HOLD)|(1<<PIN_CYCLE_START))
// Define probe switch input pin.
#define PROBE_DDR DDRC
#define PROBE_PIN PINC
#define PROBE_PORT PORTC
#define PROBE_BIT 5 // Uno Analog Pin 5
#define PROBE_MASK (1<<PROBE_BIT)
// Start of PWM & Stepper Enabled Spindle
#ifdef VARIABLE_SPINDLE
// Advanced Configuration Below You should not need to touch these variables
#define TCCRA_REGISTER TCCR2A
#define TCCRB_REGISTER TCCR2B
#define OCR_REGISTER OCR2A
#define COMB_BIT COM2A1
#define WAVE0_REGISTER WGM20
#define WAVE1_REGISTER WGM21
#define WAVE2_REGISTER WGM22
#define WAVE3_REGISTER WGM23
// NOTE: On the 328p, these must be the same as the SPINDLE_ENABLE settings.
#define SPINDLE_PWM_DDR SPINDLE_ENABLE_DDR
#define SPINDLE_PWM_PORT SPINDLE_ENABLE_PORT
#define SPINDLE_PWM_BIT SPINDLE_ENABLE_BIT // Shared with SPINDLE_ENABLE.
#endif // End of VARIABLE_SPINDLE