diff options
Diffstat (limited to 'platforms/avr')
30 files changed, 540 insertions, 515 deletions
diff --git a/platforms/avr/bootloader.c b/platforms/avr/bootloader.c deleted file mode 100644 index c0272903b8..0000000000 --- a/platforms/avr/bootloader.c +++ /dev/null @@ -1,293 +0,0 @@ -#include <stdint.h> -#include <stdbool.h> -#include <avr/io.h> -#include <avr/eeprom.h> -#include <avr/interrupt.h> -#include <avr/wdt.h> -#include <util/delay.h> -#include "bootloader.h" -#include <avr/boot.h> - -#ifdef PROTOCOL_LUFA -# include <LUFA/Drivers/USB/USB.h> -#endif - -/** \brief Bootloader Size in *bytes* - * - * AVR Boot section size are defined by setting BOOTSZ fuse in fact. Consult with your MCU datasheet. - * Note that 'Word'(2 bytes) size and address are used in datasheet while TMK uses 'Byte'. - * - * Size of Bootloaders in bytes: - * Atmel DFU loader(ATmega32U4) 4096 - * Atmel DFU loader(AT90USB128) 8192 - * LUFA bootloader(ATmega32U4) 4096 - * Arduino Caterina(ATmega32U4) 4096 - * USBaspLoader(ATmega***) 2048 - * Teensy halfKay(ATmega32U4) 512 - * Teensy++ halfKay(AT90USB128) 1024 - * - * AVR Boot section is located at the end of Flash memory like the followings. - * - * byte Atmel/LUFA(ATMega32u4) byte Atmel(AT90SUB128) - * 0x0000 +---------------+ 0x00000 +---------------+ - * | | | | - * | | | | - * | Application | | Application | - * | | | | - * = = = = - * | | 32KB-4KB | | 128KB-8KB - * 0x7000 +---------------+ 0x1E000 +---------------+ - * | Bootloader | 4KB | Bootloader | 8KB - * 0x7FFF +---------------+ 0x1FFFF +---------------+ - * - * - * byte Teensy(ATMega32u4) byte Teensy++(AT90SUB128) - * 0x0000 +---------------+ 0x00000 +---------------+ - * | | | | - * | | | | - * | Application | | Application | - * | | | | - * = = = = - * | | 32KB-512B | | 128KB-1KB - * 0x7E00 +---------------+ 0x1FC00 +---------------+ - * | Bootloader | 512B | Bootloader | 1KB - * 0x7FFF +---------------+ 0x1FFFF +---------------+ - */ -#define FLASH_SIZE (FLASHEND + 1L) - -#if !defined(BOOTLOADER_SIZE) -uint16_t bootloader_start; -#endif - -// compatibility between ATMega8 and ATMega88 -#if !defined(MCUCSR) -# if defined(MCUSR) -# define MCUCSR MCUSR -# endif -#endif - -/** \brief Entering the Bootloader via Software - * - * http://www.fourwalledcubicle.com/files/LUFA/Doc/120730/html/_page__software_bootloader_start.html - */ -#define BOOTLOADER_RESET_KEY 0xB007B007 -uint32_t reset_key __attribute__((section(".noinit,\"aw\",@nobits;"))); - -/** \brief initialize MCU status by watchdog reset - * - * FIXME: needs doc - */ -__attribute__((weak)) void bootloader_jump(void) { -#if !defined(BOOTLOADER_SIZE) - uint8_t high_fuse = boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS); - - if (high_fuse & ~(FUSE_BOOTSZ0 & FUSE_BOOTSZ1)) { - bootloader_start = (FLASH_SIZE - 512) >> 1; - } else if (high_fuse & ~(FUSE_BOOTSZ1)) { - bootloader_start = (FLASH_SIZE - 1024) >> 1; - } else if (high_fuse & ~(FUSE_BOOTSZ0)) { - bootloader_start = (FLASH_SIZE - 2048) >> 1; - } else { - bootloader_start = (FLASH_SIZE - 4096) >> 1; - } -#endif - - // Something like this might work, but it compiled larger than the block above - // bootloader_start = FLASH_SIZE - (256 << (~high_fuse & 0b110 >> 1)); - -#if defined(BOOTLOADER_HALFKAY) - // http://www.pjrc.com/teensy/jump_to_bootloader.html - cli(); - // disable watchdog, if enabled (it's not) - // disable all peripherals - // a shutdown call might make sense here - UDCON = 1; - USBCON = (1 << FRZCLK); // disable USB - UCSR1B = 0; - _delay_ms(5); -# if defined(__AVR_AT90USB162__) // Teensy 1.0 - EIMSK = 0; - PCICR = 0; - SPCR = 0; - ACSR = 0; - EECR = 0; - TIMSK0 = 0; - TIMSK1 = 0; - UCSR1B = 0; - DDRB = 0; - DDRC = 0; - DDRD = 0; - PORTB = 0; - PORTC = 0; - PORTD = 0; - asm volatile("jmp 0x3E00"); -# elif defined(__AVR_ATmega32U4__) // Teensy 2.0 - EIMSK = 0; - PCICR = 0; - SPCR = 0; - ACSR = 0; - EECR = 0; - ADCSRA = 0; - TIMSK0 = 0; - TIMSK1 = 0; - TIMSK3 = 0; - TIMSK4 = 0; - UCSR1B = 0; - TWCR = 0; - DDRB = 0; - DDRC = 0; - DDRD = 0; - DDRE = 0; - DDRF = 0; - TWCR = 0; - PORTB = 0; - PORTC = 0; - PORTD = 0; - PORTE = 0; - PORTF = 0; - asm volatile("jmp 0x7E00"); -# elif defined(__AVR_AT90USB646__) // Teensy++ 1.0 - EIMSK = 0; - PCICR = 0; - SPCR = 0; - ACSR = 0; - EECR = 0; - ADCSRA = 0; - TIMSK0 = 0; - TIMSK1 = 0; - TIMSK2 = 0; - TIMSK3 = 0; - UCSR1B = 0; - TWCR = 0; - DDRA = 0; - DDRB = 0; - DDRC = 0; - DDRD = 0; - DDRE = 0; - DDRF = 0; - PORTA = 0; - PORTB = 0; - PORTC = 0; - PORTD = 0; - PORTE = 0; - PORTF = 0; - asm volatile("jmp 0xFC00"); -# elif defined(__AVR_AT90USB1286__) // Teensy++ 2.0 - EIMSK = 0; - PCICR = 0; - SPCR = 0; - ACSR = 0; - EECR = 0; - ADCSRA = 0; - TIMSK0 = 0; - TIMSK1 = 0; - TIMSK2 = 0; - TIMSK3 = 0; - UCSR1B = 0; - TWCR = 0; - DDRA = 0; - DDRB = 0; - DDRC = 0; - DDRD = 0; - DDRE = 0; - DDRF = 0; - PORTA = 0; - PORTB = 0; - PORTC = 0; - PORTD = 0; - PORTE = 0; - PORTF = 0; - asm volatile("jmp 0x1FC00"); -# endif - -#elif defined(BOOTLOADER_CATERINA) - // this block may be optional - // TODO: figure it out - - uint16_t *const bootKeyPtr = (uint16_t *)0x0800; - - // Value used by Caterina bootloader use to determine whether to run the - // sketch or the bootloader programmer. - uint16_t bootKey = 0x7777; - - *bootKeyPtr = bootKey; - - // setup watchdog timeout - wdt_enable(WDTO_60MS); - - while (1) { - } // wait for watchdog timer to trigger - -#elif defined(BOOTLOADER_USBASP) - // Taken with permission of Stephan Baerwolf from https://github.com/tinyusbboard/API/blob/master/apipage.c - wdt_enable(WDTO_15MS); - wdt_reset(); - asm volatile("cli \n\t" - "ldi r29 , %[ramendhi] \n\t" - "ldi r28 , %[ramendlo] \n\t" -# if (FLASHEND > 131071) - "ldi r18 , %[bootaddrhi] \n\t" - "st Y+, r18 \n\t" -# endif - "ldi r18 , %[bootaddrme] \n\t" - "st Y+, r18 \n\t" - "ldi r18 , %[bootaddrlo] \n\t" - "st Y+, r18 \n\t" - "out %[mcucsrio], __zero_reg__ \n\t" - "bootloader_startup_loop%=: \n\t" - "rjmp bootloader_startup_loop%= \n\t" - : - : [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), -# else - [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)); - -#else // Assume remaining boards are DFU, even if the flag isn't set - -# if !(defined(__AVR_ATmega32A__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__) || defined(__AVR_ATtiny85__)) // no USB - maybe BOOTLOADER_BOOTLOADHID instead though? - UDCON = 1; - USBCON = (1 << FRZCLK); // disable USB - UCSR1B = 0; - _delay_ms(5); // 5 seems to work fine -# endif - -# ifdef BOOTLOADER_BOOTLOADHID - // force bootloadHID to stay in bootloader mode, so that it waits - // for a new firmware to be flashed - eeprom_write_byte((uint8_t *)1, 0x00); -# endif - - // watchdog reset - reset_key = BOOTLOADER_RESET_KEY; - wdt_enable(WDTO_250MS); - for (;;) - ; -#endif -} - -/* this runs before main() */ -void bootloader_jump_after_watchdog_reset(void) __attribute__((used, naked, section(".init3"))); -void bootloader_jump_after_watchdog_reset(void) { -#ifndef BOOTLOADER_HALFKAY - if ((MCUCSR & (1 << WDRF)) && reset_key == BOOTLOADER_RESET_KEY) { - reset_key = 0; - - // My custom USBasploader requires this to come up. - MCUCSR = 0; - - // Seems like Teensy halfkay loader requires clearing WDRF and disabling watchdog. - MCUCSR &= ~(1 << WDRF); - wdt_disable(); - -// This is compled into 'icall', address should be in word unit, not byte. -# ifdef BOOTLOADER_SIZE - ((void (*)(void))((FLASH_SIZE - BOOTLOADER_SIZE) >> 1))(); -# else - asm("ijmp" ::"z"(bootloader_start)); -# endif - } -#endif -} diff --git a/platforms/avr/bootloaders/bootloadhid.c b/platforms/avr/bootloaders/bootloadhid.c new file mode 100644 index 0000000000..ae58760d7d --- /dev/null +++ b/platforms/avr/bootloaders/bootloadhid.c @@ -0,0 +1,33 @@ +/* Copyright 2021 QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "bootloader.h" + +#include <avr/eeprom.h> +#include <avr/wdt.h> + +__attribute__((weak)) void bootloader_jump(void) { + // force bootloadHID to stay in bootloader mode, so that it waits + // for a new firmware to be flashed + // NOTE: this byte is part of QMK's "magic number" - changing it causes the EEPROM to be re-initialized + // thus every time the device is flashed the EEPROM will be wiped + eeprom_write_byte((uint8_t *)1, 0x00); + + // watchdog reset + wdt_enable(WDTO_250MS); + for (;;) + ; +} diff --git a/platforms/avr/bootloaders/caterina.c b/platforms/avr/bootloaders/caterina.c new file mode 100644 index 0000000000..82a16a3765 --- /dev/null +++ b/platforms/avr/bootloaders/caterina.c @@ -0,0 +1,39 @@ +/* Copyright 2021 QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "bootloader.h" + +#include <avr/wdt.h> + +__attribute__((weak)) void bootloader_jump(void) { + // this block may be optional + // TODO: figure it out + + uint16_t *const bootKeyPtr = (uint16_t *)0x0800; + + // Value used by Caterina bootloader use to determine whether to run the + // sketch or the bootloader programmer. + uint16_t bootKey = 0x7777; + + *bootKeyPtr = bootKey; + + // setup watchdog timeout + wdt_enable(WDTO_60MS); + + // wait for watchdog timer to trigger + while (1) { + } +} diff --git a/platforms/avr/bootloaders/custom.c b/platforms/avr/bootloaders/custom.c new file mode 100644 index 0000000000..624fbe242a --- /dev/null +++ b/platforms/avr/bootloaders/custom.c @@ -0,0 +1,19 @@ +/* Copyright 2021 QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "bootloader.h" + +__attribute__((weak)) void bootloader_jump(void) {} diff --git a/platforms/avr/bootloaders/dfu.c b/platforms/avr/bootloaders/dfu.c new file mode 100644 index 0000000000..06b2c8963a --- /dev/null +++ b/platforms/avr/bootloaders/dfu.c @@ -0,0 +1,52 @@ +/* Copyright 2021 QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "bootloader.h" + +#include <avr/wdt.h> +#include <util/delay.h> + +#define FLASH_SIZE (FLASHEND + 1L) + +/** \brief Entering the Bootloader via Software + * + * http://www.fourwalledcubicle.com/files/LUFA/Doc/120730/html/_page__software_bootloader_start.html + */ +#define BOOTLOADER_RESET_KEY 0xB007B007 +uint32_t reset_key __attribute__((section(".noinit,\"aw\",@nobits;"))); + +__attribute__((weak)) void bootloader_jump(void) { + UDCON = 1; + USBCON = (1 << FRZCLK); // disable USB + UCSR1B = 0; + _delay_ms(5); // 5 seems to work fine + + // watchdog reset + reset_key = BOOTLOADER_RESET_KEY; + wdt_enable(WDTO_250MS); + for (;;) + ; +} + +/* this runs before main() */ +void bootloader_jump_after_watchdog_reset(void) __attribute__((used, naked, section(".init3"))); +void bootloader_jump_after_watchdog_reset(void) { + if ((MCUSR & (1 << WDRF)) && reset_key == BOOTLOADER_RESET_KEY) { + reset_key = 0; + + ((void (*)(void))((FLASH_SIZE - BOOTLOADER_SIZE) >> 1))(); + } +} diff --git a/platforms/avr/bootloaders/halfkay.c b/platforms/avr/bootloaders/halfkay.c new file mode 100644 index 0000000000..651696f988 --- /dev/null +++ b/platforms/avr/bootloaders/halfkay.c @@ -0,0 +1,128 @@ +/* Copyright 2021 QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "bootloader.h" + +#include <avr/interrupt.h> +#include <util/delay.h> + +__attribute__((weak)) void bootloader_jump(void) { + // http://www.pjrc.com/teensy/jump_to_bootloader.html + + cli(); + // disable watchdog, if enabled (it's not) + // disable all peripherals + // a shutdown call might make sense here + UDCON = 1; + USBCON = (1 << FRZCLK); // disable USB + UCSR1B = 0; + _delay_ms(5); + +#if defined(__AVR_AT90USB162__) // Teensy 1.0 + EIMSK = 0; + PCICR = 0; + SPCR = 0; + ACSR = 0; + EECR = 0; + TIMSK0 = 0; + TIMSK1 = 0; + UCSR1B = 0; + DDRB = 0; + DDRC = 0; + DDRD = 0; + PORTB = 0; + PORTC = 0; + PORTD = 0; + asm volatile("jmp 0x3E00"); +#elif defined(__AVR_ATmega32U4__) // Teensy 2.0 + EIMSK = 0; + PCICR = 0; + SPCR = 0; + ACSR = 0; + EECR = 0; + ADCSRA = 0; + TIMSK0 = 0; + TIMSK1 = 0; + TIMSK3 = 0; + TIMSK4 = 0; + UCSR1B = 0; + TWCR = 0; + DDRB = 0; + DDRC = 0; + DDRD = 0; + DDRE = 0; + DDRF = 0; + TWCR = 0; + PORTB = 0; + PORTC = 0; + PORTD = 0; + PORTE = 0; + PORTF = 0; + asm volatile("jmp 0x7E00"); +#elif defined(__AVR_AT90USB646__) // Teensy++ 1.0 + EIMSK = 0; + PCICR = 0; + SPCR = 0; + ACSR = 0; + EECR = 0; + ADCSRA = 0; + TIMSK0 = 0; + TIMSK1 = 0; + TIMSK2 = 0; + TIMSK3 = 0; + UCSR1B = 0; + TWCR = 0; + DDRA = 0; + DDRB = 0; + DDRC = 0; + DDRD = 0; + DDRE = 0; + DDRF = 0; + PORTA = 0; + PORTB = 0; + PORTC = 0; + PORTD = 0; + PORTE = 0; + PORTF = 0; + asm volatile("jmp 0xFC00"); +#elif defined(__AVR_AT90USB1286__) // Teensy++ 2.0 + EIMSK = 0; + PCICR = 0; + SPCR = 0; + ACSR = 0; + EECR = 0; + ADCSRA = 0; + TIMSK0 = 0; + TIMSK1 = 0; + TIMSK2 = 0; + TIMSK3 = 0; + UCSR1B = 0; + TWCR = 0; + DDRA = 0; + DDRB = 0; + DDRC = 0; + DDRD = 0; + DDRE = 0; + DDRF = 0; + PORTA = 0; + PORTB = 0; + PORTC = 0; + PORTD = 0; + PORTE = 0; + PORTF = 0; + asm volatile("jmp 0x1FC00"); +#endif +} diff --git a/platforms/avr/bootloaders/usbasploader.c b/platforms/avr/bootloaders/usbasploader.c new file mode 100644 index 0000000000..008bd16069 --- /dev/null +++ b/platforms/avr/bootloaders/usbasploader.c @@ -0,0 +1,56 @@ +/* Copyright 2021 QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "bootloader.h" + +#include <avr/wdt.h> + +#define FLASH_SIZE (FLASHEND + 1L) + +#if !defined(MCUCSR) +# if defined(MCUSR) +# define MCUCSR MCUSR +# endif +#endif + +__attribute__((weak)) void bootloader_jump(void) { + // Taken with permission of Stephan Baerwolf from https://github.com/tinyusbboard/API/blob/master/apipage.c + + wdt_enable(WDTO_15MS); + wdt_reset(); + asm volatile("cli \n\t" + "ldi r29 , %[ramendhi] \n\t" + "ldi r28 , %[ramendlo] \n\t" +#if (FLASHEND > 131071) + "ldi r18 , %[bootaddrhi] \n\t" + "st Y+, r18 \n\t" +#endif + "ldi r18 , %[bootaddrme] \n\t" + "st Y+, r18 \n\t" + "ldi r18 , %[bootaddrlo] \n\t" + "st Y+, r18 \n\t" + "out %[mcucsrio], __zero_reg__ \n\t" + "bootloader_startup_loop%=: \n\t" + "rjmp bootloader_startup_loop%= \n\t" + : + : [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), +#else + [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)); +} diff --git a/platforms/avr/drivers/analog.c b/platforms/avr/drivers/analog.c index 628835ccef..ed4d563609 100644 --- a/platforms/avr/drivers/analog.c +++ b/platforms/avr/drivers/analog.c @@ -21,9 +21,13 @@ static uint8_t aref = ADC_REF_POWER; -void analogReference(uint8_t mode) { aref = mode & (_BV(REFS1) | _BV(REFS0)); } +void analogReference(uint8_t mode) { + aref = mode & (_BV(REFS1) | _BV(REFS0)); +} -int16_t analogReadPin(pin_t pin) { return adc_read(pinToMux(pin)); } +int16_t analogReadPin(pin_t pin) { + return adc_read(pinToMux(pin)); +} uint8_t pinToMux(pin_t pin) { switch (pin) { diff --git a/platforms/avr/drivers/analog.h b/platforms/avr/drivers/analog.h index fa2fb0d89b..fb13e106ff 100644 --- a/platforms/avr/drivers/analog.h +++ b/platforms/avr/drivers/analog.h @@ -32,21 +32,21 @@ int16_t adc_read(uint8_t mux); } #endif -#define ADC_REF_EXTERNAL 0 // AREF, Internal Vref turned off -#define ADC_REF_POWER _BV(REFS0) // AVCC with external capacitor on AREF pin -#define ADC_REF_INTERNAL (_BV(REFS1) | _BV(REFS0)) // Internal 2.56V Voltage Reference with external capacitor on AREF pin (1.1V for 328P) +#define ADC_REF_EXTERNAL 0 // AREF, Internal Vref turned off +#define ADC_REF_POWER _BV(REFS0) // AVCC with external capacitor on AREF pin +#define ADC_REF_INTERNAL (_BV(REFS1) | _BV(REFS0)) // Internal 2.56V Voltage Reference with external capacitor on AREF pin (1.1V for 328P) // These prescaler values are for high speed mode, ADHSM = 1 #if F_CPU == 16000000L || F_CPU == 12000000L -# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS1)) // /64 +# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS1)) // /64 #elif F_CPU == 8000000L -# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS0)) // /32 +# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS0)) // /32 #elif F_CPU == 4000000L -# define ADC_PRESCALER (_BV(ADPS2)) // /16 +# define ADC_PRESCALER (_BV(ADPS2)) // /16 #elif F_CPU == 2000000L -# define ADC_PRESCALER (_BV(ADPS1) | _BV(ADPS0)) // /8 +# define ADC_PRESCALER (_BV(ADPS1) | _BV(ADPS0)) // /8 #elif F_CPU == 1000000L -# define ADC_PRESCALER _BV(ADPS1) // /4 +# define ADC_PRESCALER _BV(ADPS1) // /4 #else -# define ADC_PRESCALER _BV(ADPS0) // /2 +# define ADC_PRESCALER _BV(ADPS0) // /2 #endif diff --git a/platforms/avr/drivers/audio_pwm_hardware.c b/platforms/avr/drivers/audio_pwm_hardware.c index df03a4558c..78776ee48a 100644 --- a/platforms/avr/drivers/audio_pwm_hardware.c +++ b/platforms/avr/drivers/audio_pwm_hardware.c @@ -152,7 +152,7 @@ extern uint8_t note_timbre; #ifdef AUDIO1_PIN_SET static float channel_1_frequency = 0.0f; void channel_1_set_frequency(float freq) { - if (freq == 0.0f) // a pause/rest is a valid "note" with freq=0 + if (freq == 0.0f) // a pause/rest is a valid "note" with freq=0 { // disable the output, but keep the pwm-ISR going (with the previous // frequency) so the audio-state keeps getting updated @@ -160,7 +160,7 @@ void channel_1_set_frequency(float freq) { AUDIO1_TCCRxA &= ~(_BV(AUDIO1_COMxy1) | _BV(AUDIO1_COMxy0)); return; } else { - AUDIO1_TCCRxA |= _BV(AUDIO1_COMxy1); // enable output, PWM mode + AUDIO1_TCCRxA |= _BV(AUDIO1_COMxy1); // enable output, PWM mode } channel_1_frequency = freq; @@ -202,7 +202,9 @@ void channel_2_set_frequency(float freq) { AUDIO2_OCRxy = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre / 100); } -float channel_2_get_frequency(void) { return channel_2_frequency; } +float channel_2_get_frequency(void) { + return channel_2_frequency; +} void channel_2_start(void) { AUDIO2_TIMSKx |= _BV(AUDIO2_OCIExy); 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