Initial support for ATtiny85 (#8632)
* Initial support for ATtiny85 * Update mcu selection
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4 changed files with 33 additions and 8 deletions
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@ -63,6 +63,9 @@
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# define PINB_ADDRESS 0x3
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# define PINC_ADDRESS 0x6
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# define PIND_ADDRESS 0x9
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# elif defined(__AVR_ATtiny85__)
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# define ADDRESS_BASE 0x10
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# define PINB_ADDRESS 0x6
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# else
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# error "Pins are not defined"
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# endif
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@ -287,3 +287,18 @@ ifneq (,$(filter $(MCU),atmega328p))
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NO_UART ?= yes
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NO_SUSPEND_POWER_DOWN ?= yes
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endif
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ifneq (,$(filter $(MCU),attiny85))
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PROTOCOL = VUSB
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# Processor frequency.
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# This will define a symbol, F_CPU, in all source code files equal to the
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# processor frequency in Hz. You can then use this symbol in your source code to
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# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
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# automatically to create a 32-bit value in your source code.
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F_CPU ?= 16500000
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# unsupported features for now
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NO_UART ?= yes
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NO_SUSPEND_POWER_DOWN ?= yes
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endif
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@ -247,7 +247,7 @@ void bootloader_jump(void) {
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#else // Assume remaining boards are DFU, even if the flag isn't set
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# if !(defined(__AVR_ATmega32A__) || defined(__AVR_ATmega328P__)) // no USB - maybe BOOTLOADER_BOOTLOADHID instead though?
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# if !(defined(__AVR_ATmega32A__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATtiny85__)) // no USB - maybe BOOTLOADER_BOOTLOADHID instead though?
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UDCON = 1;
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USBCON = (1 << FRZCLK); // disable USB
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UCSR1B = 0;
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@ -45,19 +45,26 @@ void timer_init(void) {
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# error "Timer prescaler value is not valid"
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#endif
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#ifndef __AVR_ATmega32A__
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#if defined(__AVR_ATmega32A__)
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// Timer0 CTC mode
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TCCR0 = _BV(WGM01) | prescaler;
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OCR0 = TIMER_RAW_TOP;
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TIMSK = _BV(OCIE0);
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#elif defined(__AVR_ATtiny85__)
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// Timer0 CTC mode
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TCCR0A = _BV(WGM01);
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TCCR0B = prescaler;
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OCR0A = TIMER_RAW_TOP;
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TIMSK = _BV(OCIE0A);
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#else
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// Timer0 CTC mode
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TCCR0A = _BV(WGM01);
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TCCR0B = prescaler;
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OCR0A = TIMER_RAW_TOP;
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TIMSK0 = _BV(OCIE0A);
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#else
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// Timer0 CTC mode
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TCCR0 = _BV(WGM01) | prescaler;
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OCR0 = TIMER_RAW_TOP;
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TIMSK = _BV(OCIE0);
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#endif
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}
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