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Add AT90USB support for serial.c #10706

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merged 5 commits into from
Nov 19, 2020
Merged

Add AT90USB support for serial.c #10706

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2b2d6e3
Expand list of supported controllers for serial.c
drashna Oct 21, 2020
3dce107
Fix pin defines based on mtei's feedback
drashna Oct 21, 2020
583943c
Fix EICRx checks in soft_serial_target_init
drashna Oct 22, 2020
01256ec
Fix copy-paste typo
drashna Oct 23, 2020
57a3616
Add defines for EICRx
drashna Oct 27, 2020
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141 changes: 98 additions & 43 deletions drivers/avr/serial.c
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Original file line number Diff line number Diff line change
Expand Up @@ -20,50 +20,111 @@

#ifdef SOFT_SERIAL_PIN

# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
// if using ATmegaxxU4 I2C, can not use PD0 and PD1 in soft serial.
# ifdef USE_AVR_I2C
# if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
# error Using ATmegaxxU4 I2C, so can not use PD0, PD1
# endif
# if !(defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
# error serial.c is not supported for the currently selected MCU
# endif
// if using ATmega32U4/2, AT90USBxxx I2C, can not use PD0 and PD1 in soft serial.
# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
# if defined(USE_AVR_I2C) && (SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1)
# error Using I2C, so can not use PD0, PD1
# endif
# endif
// PD0..PD3, common config
# if SOFT_SERIAL_PIN == D0
# define EIMSK_BIT _BV(INT0)
# define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
# define SERIAL_PIN_INTERRUPT INT0_vect
# define EICRx EICRA
# elif SOFT_SERIAL_PIN == D1
# define EIMSK_BIT _BV(INT1)
# define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
# define SERIAL_PIN_INTERRUPT INT1_vect
# define EICRx EICRA
# elif SOFT_SERIAL_PIN == D2
# define EIMSK_BIT _BV(INT2)
# define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
# define SERIAL_PIN_INTERRUPT INT2_vect
# define EICRx EICRA
# elif SOFT_SERIAL_PIN == D3
# define EIMSK_BIT _BV(INT3)
# define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
# define SERIAL_PIN_INTERRUPT INT3_vect
# define EICRx EICRA
# endif

# define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
# define setPinOutput(pin) (DDRx_ADDRESS(pin) |= _BV((pin)&0xF))
# define writePinHigh(pin) (PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
# define writePinLow(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin)&0xF))
# define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin)&0xF)))

# if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
# if SOFT_SERIAL_PIN == D0
# define EIMSK_BIT _BV(INT0)
# define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
# define SERIAL_PIN_INTERRUPT INT0_vect
# elif SOFT_SERIAL_PIN == D1
# define EIMSK_BIT _BV(INT1)
# define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
# define SERIAL_PIN_INTERRUPT INT1_vect
# elif SOFT_SERIAL_PIN == D2
# define EIMSK_BIT _BV(INT2)
# define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
# define SERIAL_PIN_INTERRUPT INT2_vect
# elif SOFT_SERIAL_PIN == D3
# define EIMSK_BIT _BV(INT3)
# define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
# define SERIAL_PIN_INTERRUPT INT3_vect
# endif
# elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) && SOFT_SERIAL_PIN == E6
// ATmegaxxU2 specific config
# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__)
// PD4(INT5), PD6(INT6), PD7(INT7), PC7(INT4)
# if SOFT_SERIAL_PIN == D4
# define EIMSK_BIT _BV(INT5)
# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51)))
# define SERIAL_PIN_INTERRUPT INT5_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == D6
# define EIMSK_BIT _BV(INT6)
# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
# define SERIAL_PIN_INTERRUPT INT6_vect
# else
# error invalid SOFT_SERIAL_PIN value
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == D7
# define EIMSK_BIT _BV(INT7)
# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71)))
# define SERIAL_PIN_INTERRUPT INT7_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == C7
# define EIMSK_BIT _BV(INT4)
# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41)))
# define SERIAL_PIN_INTERRUPT INT4_vect
# define EICRx EICRB
# endif
# endif

# else
# error serial.c currently only supports ATmegaxxU2 and ATmegaxxU4
// ATmegaxxU4 specific config
# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
// PE6(INT6)
# if SOFT_SERIAL_PIN == E6
# define EIMSK_BIT _BV(INT6)
# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
# define SERIAL_PIN_INTERRUPT INT6_vect
# define EICRx EICRB
# endif
# endif

// AT90USBxxx specific config
# if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
// PE4..PE7(INT4..INT7)
# if SOFT_SERIAL_PIN == E4
# define EIMSK_BIT _BV(INT4)
# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41)))
# define SERIAL_PIN_INTERRUPT INT4_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == E5
# define EIMSK_BIT _BV(INT5)
# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51)))
# define SERIAL_PIN_INTERRUPT INT5_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == E6
# define EIMSK_BIT _BV(INT6)
# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
# define SERIAL_PIN_INTERRUPT INT6_vect
# define EICRx EICRB
# elif SOFT_SERIAL_PIN == E7
# define EIMSK_BIT _BV(INT7)
# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71)))
# define SERIAL_PIN_INTERRUPT INT7_vect
# define EICRx EICRB
# endif
# endif

# ifndef SERIAL_PIN_INTERRUPT
# error invalid SOFT_SERIAL_PIN value
# endif

# define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
# define setPinOutput(pin) (DDRx_ADDRESS(pin) |= _BV((pin)&0xF))
# define writePinHigh(pin) (PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
# define writePinLow(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin)&0xF))
# define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin)&0xF)))

# define ALWAYS_INLINE __attribute__((always_inline))
# define NO_INLINE __attribute__((noinline))
# define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
Expand Down Expand Up @@ -210,15 +271,9 @@ void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size) {
Transaction_table_size = (uint8_t)sstd_table_size;
serial_input_with_pullup();

// Enable INT0-INT3,INT6
// Enable INT0-INT7
EIMSK |= EIMSK_BIT;
# if SOFT_SERIAL_PIN == E6
// Trigger on falling edge of INT6
EICRB &= EICRx_BIT;
# else
// Trigger on falling edge of INT0-INT3
EICRA &= EICRx_BIT;
# endif
EICRx &= EICRx_BIT;
}

// Used by the sender to synchronize timing with the reciver.
Expand Down