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Initial support for ATtiny85 (#8632)

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* Initial support for ATtiny85

* Update mcu selection
This commit is contained in:
Joel Challis
2020-04-02 22:23:57 +01:00
committed by Florian Didron
parent 65de39bb6d
commit fec6ee365c
4 changed files with 37 additions and 12 deletions
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10
tmk_core/common/avr/bootloader.c
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@@ -237,17 +237,17 @@ void bootloader_jump(void) {
"bootloader_startup_loop%=: \n\t"
"rjmp bootloader_startup_loop%= \n\t"
:
: [ mcucsrio ] "I"(_SFR_IO_ADDR(MCUCSR)),
: [mcucsrio] "I"(_SFR_IO_ADDR(MCUCSR)),
# if (FLASHEND > 131071)
[ ramendhi ] "M"(((RAMEND - 2) >> 8) & 0xff), [ ramendlo ] "M"(((RAMEND - 2) >> 0) & 0xff), [ bootaddrhi ] "M"((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 16) & 0xff),
[ramendhi] "M"(((RAMEND - 2) >> 8) & 0xff), [ramendlo] "M"(((RAMEND - 2) >> 0) & 0xff), [bootaddrhi] "M"((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 16) & 0xff),
# else
[ ramendhi ] "M"(((RAMEND - 1) >> 8) & 0xff), [ ramendlo ] "M"(((RAMEND - 1) >> 0) & 0xff),
[ramendhi] "M"(((RAMEND - 1) >> 8) & 0xff), [ramendlo] "M"(((RAMEND - 1) >> 0) & 0xff),
# endif
[ bootaddrme ] "M"((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 8) & 0xff), [ bootaddrlo ] "M"((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 0) & 0xff));
[bootaddrme] "M"((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 8) & 0xff), [bootaddrlo] "M"((((FLASH_SIZE - BOOTLOADER_SIZE) >> 1) >> 0) & 0xff));
#else // Assume remaining boards are DFU, even if the flag isn't set
# if !(defined(__AVR_ATmega32A__) || defined(__AVR_ATmega328P__)) // no USB - maybe BOOTLOADER_BOOTLOADHID instead though?
# if !(defined(__AVR_ATmega32A__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATtiny85__)) // no USB - maybe BOOTLOADER_BOOTLOADHID instead though?
UDCON = 1;
USBCON = (1 << FRZCLK); // disable USB
UCSR1B = 0;

21
tmk_core/common/avr/timer.c
View File

@@ -45,19 +45,26 @@ void timer_init(void) {
# error "Timer prescaler value is not valid"
#endif
#ifndef __AVR_ATmega32A__
#if defined(__AVR_ATmega32A__)
// Timer0 CTC mode
TCCR0 = _BV(WGM01) | prescaler;
OCR0 = TIMER_RAW_TOP;
TIMSK = _BV(OCIE0);
#elif defined(__AVR_ATtiny85__)
// Timer0 CTC mode
TCCR0A = _BV(WGM01);
TCCR0B = prescaler;
OCR0A = TIMER_RAW_TOP;
TIMSK = _BV(OCIE0A);
#else
// Timer0 CTC mode
TCCR0A = _BV(WGM01);
TCCR0B = prescaler;
OCR0A = TIMER_RAW_TOP;
TIMSK0 = _BV(OCIE0A);
#else
// Timer0 CTC mode
TCCR0 = _BV(WGM01) | prescaler;
OCR0 = TIMER_RAW_TOP;
TIMSK = _BV(OCIE0);
#endif
}