picolibrary-microchip-megaavr

Peripheral Facilities

Table of Contents

1. Peripherals
   1. PORT
   2. SPI
   3. TWI
   4. USART
2. Peripheral Instances
   1. ATmega328/P
   2. ATmega2560

Peripherals

The layout of each Microchip megaAVR peripheral’s registers is defined by the class named after the peripheral (e.g. the layout of the SPI peripheral’s registers is defined by the ::picolibrary::Microchip::megaAVR::Peripheral::SPI class). Peripheral registers are accessed via the member variables named after the registers (e.g. the SPI peripheral’s SPCR register is accessed via the ::picolibrary::Microchip::megaAVR::Peripheral::SPI::spcr member variable). Peripheral register information is defined in member classes named after the registers (e.g. SPI peripheral SPCR register information is defined in the ::picolibrary::Microchip::megaAVR::Peripheral::SPI::SPCR member class). Peripheral register field constants are defined in the following member structures:

• Size: field sizes (e.g. the size of the SPR field of the SPI peripheral’s SPCR register is defined by the ::picolibrary::Microchip::megaAVR::Peripheral::SPI::SPCR::Size::SPR constant)
• Bit: field bit positions (e.g. the position of the SPR field of the SPI peripheral’s SPCR register is defined by the ::picolibrary::Microchip::megaAVR::Peripheral::SPI::SPCR::Bit::SPR constant)
• Mask: field bit masks (e.g. the mask for the SPR field of the SPI peripheral’s SPCR register is defined by the ::picolibrary::Microchip::megaAVR::Peripheral::SPI::SPCR::Mask::SPR constant)

PORT

The ::picolibrary::Microchip::megaAVR::Peripheral::PORT class defines the layout of the Microchip megaAVR PORT peripheral. The ::picolibrary::Microchip::megaAVR::Peripheral::PORT class is defined in the include/picolibrary/microchip/megaavr/peripheral/port.h/source/picolibrary/microchip/megaavr/peripheral/port.cc header/source file pair.

SPI

The ::picolibrary::Microchip::megaAVR::Peripheral::SPI class defines the layout of the Microchip megaAVR SPI peripheral and information about its registers. The ::picolibrary::Microchip::megaAVR::Peripheral::SPI class is defined in the include/picolibrary/microchip/megaavr/peripheral/spi.h/source/picolibrary/microchip/megaavr/peripheral/spi.cc header/source file pair.

TWI

The ::picolibrary::Microchip::megaAVR::Peripheral::TWI class defines the layout of the Microchip megaAVR TWI peripheral and information about its registers. The ::picolibrary::Microchip::megaAVR::Peripheral::TWI class is defined in the include/picolibrary/microchip/megaavr/peripheral/twi.h/source/picolibrary/microchip/megaavr/peripheral/twi.cc header/source file pair.

USART

The ::picolibrary::Microchip::megaAVR::Peripheral::USART class defines the layout of the Microchip megaAVR USART peripheral and information about its registers. The ::picolibrary::Microchip::megaAVR::Peripheral::USART class is defined in the include/picolibrary/microchip/megaavr/peripheral/usart.h/source/picolibrary/microchip/megaavr/peripheral/usart.cc header/source file pair.

The ::picolibrary::Microchip::megaAVR::Peripheral::USART class has a different structure than other Microchip megaAVR peripheral classes due to the Microchip megaAVR USART peripheral’s multiple operating modes (normal mode and SPI host mode). Classes and variables that would be members of the ::picolibrary::Microchip::megaAVR::Peripheral::USART class are instead members of the ::picolibrary::Microchip::megaAVR::Peripheral::USART::Normal and ::picolibrary::Microchip::megaAVR::Peripheral::USART::SPI_Host member classes. A USART peripheral’s ::picolibrary::Microchip::megaAVR::Peripheral::USART::Normal instance is accessed via the ::picolibrary::Microchip::megaAVR::Peripheral::USART::normal member variable. A USART peripheral’s ::picolibrary::Microchip::megaAVR::Peripheral::USART::SPI_Host instance is accessed via the ::picolibrary::Microchip::megaAVR::Peripheral::USART::spi_host member variable.

Peripheral Instances

Microchip megaAVR MCU specific peripheral instances are defined in MCU specific namespaces and header/source file pairs (e.g. ATmega2560 peripheral instances are defined in the ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560 namespace which is defined in the include/picolibrary/microchip/megaavr/peripheral/atmega2560.h/source/picolibrary/microchip/megaavr/peripheral/atmega2560.cc header/source file pair). Peripheral instance definitions for the active MCU type are imported into the ::picolibrary::Microchip::megaAVR::Peripheral namespace and can be accessed via the include/picolibrary/microchip/megaavr/peripheral.h header file.

ATmega328/P

Microchip ATmega328/P peripheral instances are defined in the include/picolibrary/microchip/megaavr/peripheral/atmega328p.h/source/picolibrary/microchip/megaavr/peripheral/atmega328p.cc header/source file pair. The following peripheral instances are defined (listed alphabetically):

• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega328P::PORTB
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega328P::PORTC
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega328P::PORTD
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega328P::SPI0
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega328P::TWI0
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega328P::USART0

ATmega2560

Microchip ATmega2560 peripheral instances are defined in the include/picolibrary/microchip/megaavr/peripheral/atmega2560.h/source/picolibrary/microchip/megaavr/peripheral/atmega2560.cc header/source file pair. The following peripheral instances are defined (listed alphabetically):

• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTA
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTB
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTC
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTD
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTE
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTF
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTG
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTH
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTJ
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTK
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::PORTL
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::SPI0
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::TWI0
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::USART0
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::USART1
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::USART2
• ::picolibrary::Microchip::megaAVR::Peripheral::ATmega2560::USART3

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