Add AT90USB support for serial.c (#10706)
* Expand list of supported controllers for serial.c * Fix pin defines based on mtei's feedback * Fix EICRx checks in soft_serial_target_init * Fix copy-paste typo * Add defines for EICRx
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Drashna Jaelre
GitHub
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1 changed files with 99 additions and 44 deletions
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@ -20,12 +20,103 @@
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#ifdef SOFT_SERIAL_PIN
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# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
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// if using ATmegaxxU4 I2C, can not use PD0 and PD1 in soft serial.
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# ifdef USE_AVR_I2C
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# if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
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# error Using ATmegaxxU4 I2C, so can not use PD0, PD1
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# 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__))
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# error serial.c is not supported for the currently selected MCU
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# endif
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// if using ATmega32U4/2, AT90USBxxx I2C, can not use PD0 and PD1 in soft serial.
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# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
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# if defined(USE_AVR_I2C) && (SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1)
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# error Using I2C, so can not use PD0, PD1
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# endif
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# endif
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// PD0..PD3, common config
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# if SOFT_SERIAL_PIN == D0
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# define EIMSK_BIT _BV(INT0)
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# define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
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# define SERIAL_PIN_INTERRUPT INT0_vect
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# define EICRx EICRA
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# elif SOFT_SERIAL_PIN == D1
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# define EIMSK_BIT _BV(INT1)
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# define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
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# define SERIAL_PIN_INTERRUPT INT1_vect
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# define EICRx EICRA
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# elif SOFT_SERIAL_PIN == D2
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# define EIMSK_BIT _BV(INT2)
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# define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
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# define SERIAL_PIN_INTERRUPT INT2_vect
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# define EICRx EICRA
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# elif SOFT_SERIAL_PIN == D3
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# define EIMSK_BIT _BV(INT3)
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# define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
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# define SERIAL_PIN_INTERRUPT INT3_vect
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# define EICRx EICRA
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# endif
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// ATmegaxxU2 specific config
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# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__)
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// PD4(INT5), PD6(INT6), PD7(INT7), PC7(INT4)
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# if SOFT_SERIAL_PIN == D4
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# define EIMSK_BIT _BV(INT5)
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# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51)))
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# define SERIAL_PIN_INTERRUPT INT5_vect
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# define EICRx EICRB
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# elif SOFT_SERIAL_PIN == D6
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# define EIMSK_BIT _BV(INT6)
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# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
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# define SERIAL_PIN_INTERRUPT INT6_vect
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# define EICRx EICRB
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# elif SOFT_SERIAL_PIN == D7
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# define EIMSK_BIT _BV(INT7)
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# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71)))
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# define SERIAL_PIN_INTERRUPT INT7_vect
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# define EICRx EICRB
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# elif SOFT_SERIAL_PIN == C7
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# define EIMSK_BIT _BV(INT4)
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# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41)))
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# define SERIAL_PIN_INTERRUPT INT4_vect
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# define EICRx EICRB
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# endif
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# endif
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// ATmegaxxU4 specific config
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# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)
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// PE6(INT6)
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# if SOFT_SERIAL_PIN == E6
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# define EIMSK_BIT _BV(INT6)
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# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
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# define SERIAL_PIN_INTERRUPT INT6_vect
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# define EICRx EICRB
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# endif
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# endif
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// AT90USBxxx specific config
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# if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
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// PE4..PE7(INT4..INT7)
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# if SOFT_SERIAL_PIN == E4
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# define EIMSK_BIT _BV(INT4)
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# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41)))
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# define SERIAL_PIN_INTERRUPT INT4_vect
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# define EICRx EICRB
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# elif SOFT_SERIAL_PIN == E5
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# define EIMSK_BIT _BV(INT5)
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# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51)))
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# define SERIAL_PIN_INTERRUPT INT5_vect
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# define EICRx EICRB
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# elif SOFT_SERIAL_PIN == E6
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# define EIMSK_BIT _BV(INT6)
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# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
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# define SERIAL_PIN_INTERRUPT INT6_vect
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# define EICRx EICRB
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# elif SOFT_SERIAL_PIN == E7
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# define EIMSK_BIT _BV(INT7)
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# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71)))
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# define SERIAL_PIN_INTERRUPT INT7_vect
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# define EICRx EICRB
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# endif
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# endif
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# ifndef SERIAL_PIN_INTERRUPT
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# error invalid SOFT_SERIAL_PIN value
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# endif
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# define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
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@ -34,36 +125,6 @@
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# define writePinLow(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin)&0xF))
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# define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin)&0xF)))
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# if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
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# if SOFT_SERIAL_PIN == D0
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# define EIMSK_BIT _BV(INT0)
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# define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
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# define SERIAL_PIN_INTERRUPT INT0_vect
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# elif SOFT_SERIAL_PIN == D1
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# define EIMSK_BIT _BV(INT1)
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# define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
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# define SERIAL_PIN_INTERRUPT INT1_vect
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# elif SOFT_SERIAL_PIN == D2
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# define EIMSK_BIT _BV(INT2)
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# define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
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# define SERIAL_PIN_INTERRUPT INT2_vect
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# elif SOFT_SERIAL_PIN == D3
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# define EIMSK_BIT _BV(INT3)
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# define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
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# define SERIAL_PIN_INTERRUPT INT3_vect
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# endif
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# elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) && SOFT_SERIAL_PIN == E6
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# define EIMSK_BIT _BV(INT6)
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# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
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# define SERIAL_PIN_INTERRUPT INT6_vect
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# else
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# error invalid SOFT_SERIAL_PIN value
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# endif
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# else
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# error serial.c currently only supports ATmegaxxU2 and ATmegaxxU4
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# endif
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# define ALWAYS_INLINE __attribute__((always_inline))
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# define NO_INLINE __attribute__((noinline))
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# define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
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@ -210,15 +271,9 @@ void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size) {
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Transaction_table_size = (uint8_t)sstd_table_size;
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serial_input_with_pullup();
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// Enable INT0-INT3,INT6
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// Enable INT0-INT7
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EIMSK |= EIMSK_BIT;
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# if SOFT_SERIAL_PIN == E6
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// Trigger on falling edge of INT6
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EICRB &= EICRx_BIT;
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# else
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// Trigger on falling edge of INT0-INT3
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EICRA &= EICRx_BIT;
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# endif
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EICRx &= EICRx_BIT;
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}
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// Used by the sender to synchronize timing with the reciver.
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