arduino_mega.rst

Arduino Mega

Pinout

Default system features

The default configuration includes those major features. They are all initialized by sys_start() at the startup of the application.

• Console.<../library-reference/oam/console>
• Debug shell.<../library-reference/oam/shell>

Drivers

Supported drivers for this board.

• ../library-reference/drivers/adc
• ../library-reference/drivers/analog_input_pin
• ../library-reference/drivers/analog_output_pin
• ../library-reference/drivers/ds18b20
• ../library-reference/drivers/ds3231
• ../library-reference/drivers/exti
• ../library-reference/drivers/i2c
• ../library-reference/drivers/i2c_soft
• ../library-reference/drivers/mcp2515
• ../library-reference/drivers/nrf24l01
• ../library-reference/drivers/owi
• ../library-reference/drivers/pin
• ../library-reference/drivers/pwm
• ../library-reference/drivers/pwm_soft
• ../library-reference/drivers/sd
• ../library-reference/drivers/spi
• ../library-reference/drivers/uart
• ../library-reference/drivers/uart_soft
• ../library-reference/drivers/watchdog

Library Reference

Read more about board specific functionality in the Arduino Mega <../library-reference/boards/arduino_mega> module documentation in the Library Reference.

Memory usage

Below is the memory usage of two applications:

• The minimal-configuration<examples/minimal-configuration> application is configured to only include the bare minimum of functionality for the low level kernel to run. That is, the thread scheduler and system tick.
• The default-configuration<examples/default-configuration> application is built with the default configuration, including a lot more functionality. See the list of Default system features above for a summary.

Application	Flash	RAM
minimal-configuration	1734	279
default-configuration	64414	4005

Default configuration

Default Standard Library configuration.

Name	Value
CONFIG_ADC	1
CONFIG_ANALOG_INPUT_PIN	1
CONFIG_ANALOG_OUTPUT_PIN	1
CONFIG_ASSERT	1
CONFIG_ASSERT_FORCE_FATAL	1
CONFIG_CAN	0
CONFIG_CAN_FRAME_TIMESTAMP	1
CONFIG_CHIPID	0
CONFIG_CRC_TABLE_LOOKUP	1
CONFIG_DAC	0
CONFIG_DEBUG	1
CONFIG_DS18B20	1
CONFIG_DS3231	1
CONFIG_EEPROM_SOFT_CRC	CONFIG_EEPROM_SOFT_CRC_32
CONFIG_EEPROM_SOFT_CRC_32	0
CONFIG_EEPROM_SOFT_CRC_CCITT	1
CONFIG_EEPROM_SOFT_SEMAPHORE	1
CONFIG_EMACS_COLUMNS_MAX	80
CONFIG_EMACS_HEAP_SIZE	32768
CONFIG_EMACS_ROWS_MAX	24
CONFIG_ESP_WIFI	0
CONFIG_EXTERNAL_OSCILLATOR_FREQUENCY_HZ	16000000
CONFIG_EXTI	1
CONFIG_FAT16	1
CONFIG_FATAL_ASSERT	1
CONFIG_FILESYSTEM_GENERIC	1
CONFIG_FLASH	0
CONFIG_FLASH_DEVICE_SEMAPHORE	1
CONFIG_FLOAT	1
CONFIG_FS_CMD_DS18B20_LIST	1
CONFIG_FS_CMD_ESP_WIFI_STATUS	0
CONFIG_FS_CMD_FS_APPEND	1
CONFIG_FS_CMD_FS_COUNTERS_LIST	1
CONFIG_FS_CMD_FS_COUNTERS_RESET	1
CONFIG_FS_CMD_FS_FILESYSTEMS_LIST	1
CONFIG_FS_CMD_FS_FORMAT	1
CONFIG_FS_CMD_FS_LIST	1
CONFIG_FS_CMD_FS_PARAMETERS_LIST	1
CONFIG_FS_CMD_FS_READ	1
CONFIG_FS_CMD_FS_REMOVE	1
CONFIG_FS_CMD_FS_WRITE	1
CONFIG_FS_CMD_I2C_READ	1
CONFIG_FS_CMD_I2C_WRITE	1
CONFIG_FS_CMD_LOG_LIST	1
CONFIG_FS_CMD_LOG_PRINT	1
CONFIG_FS_CMD_LOG_SET_LOG_MASK	1
CONFIG_FS_CMD_NETWORK_INTERFACE_LIST	1
CONFIG_FS_CMD_NVM_READ	1
CONFIG_FS_CMD_NVM_WRITE	1
CONFIG_FS_CMD_PING_PING	1
CONFIG_FS_CMD_PIN_READ	1
CONFIG_FS_CMD_PIN_SET_MODE	1
CONFIG_FS_CMD_PIN_WRITE	1
CONFIG_FS_CMD_SERVICE_LIST	1
CONFIG_FS_CMD_SERVICE_START	1
CONFIG_FS_CMD_SERVICE_STOP	1
CONFIG_FS_CMD_SETTINGS_LIST	1
CONFIG_FS_CMD_SETTINGS_READ	1
CONFIG_FS_CMD_SETTINGS_RESET	1
CONFIG_FS_CMD_SETTINGS_WRITE	1
CONFIG_FS_CMD_SYS_BACKTRACE	1
CONFIG_FS_CMD_SYS_CONFIG	1
CONFIG_FS_CMD_SYS_INFO	1
CONFIG_FS_CMD_SYS_PANIC	1
CONFIG_FS_CMD_SYS_REBOOT	1
CONFIG_FS_CMD_SYS_RESET_CAUSE	1
CONFIG_FS_CMD_SYS_UPTIME	1
CONFIG_FS_CMD_THRD_LIST	1
CONFIG_FS_CMD_THRD_SET_LOG_MASK	1
CONFIG_FS_CMD_UPGRADE_APPLICATION_ENTER	1
CONFIG_FS_CMD_UPGRADE_APPLICATION_ERASE	1
CONFIG_FS_CMD_UPGRADE_APPLICATION_IS_VALID	1
CONFIG_FS_CMD_UPGRADE_BOOTLOADER_ENTER	1
CONFIG_FS_CMD_USB_DEVICE_LIST	1
CONFIG_FS_CMD_USB_HOST_LIST	1
CONFIG_FS_PATH_MAX	64
CONFIG_HARNESS_EXPECT_BUFFER_SIZE	512
CONFIG_HARNESS_HEAP_MAX	2048
CONFIG_HARNESS_MOCK_VERBOSE	1
CONFIG_HARNESS_SLEEP_MS	300
CONFIG_HTTP_SERVER_REQUEST_BUFFER_SIZE	128
CONFIG_HTTP_SERVER_SSL	0
CONFIG_I2C	1
CONFIG_I2C_SOFT	1
CONFIG_LED_7SEG_HT16K33	0
CONFIG_LINUX_SOCKET_DEVICE	0
CONFIG_MCP2515	1
CONFIG_MODULE_INIT_ADC	1
CONFIG_MODULE_INIT_ANALOG_INPUT_PIN	1
CONFIG_MODULE_INIT_ANALOG_OUTPUT_PIN	1
CONFIG_MODULE_INIT_BUS	1
CONFIG_MODULE_INIT_CAN	0
CONFIG_MODULE_INIT_CHAN	1
CONFIG_MODULE_INIT_CHIPID	0
CONFIG_MODULE_INIT_DAC	0
CONFIG_MODULE_INIT_DS18B20	1
CONFIG_MODULE_INIT_DS3231	1
CONFIG_MODULE_INIT_ESP_WIFI	0
CONFIG_MODULE_INIT_EXTI	1
CONFIG_MODULE_INIT_FLASH	0
CONFIG_MODULE_INIT_FS	1
CONFIG_MODULE_INIT_I2C	1
CONFIG_MODULE_INIT_I2C_SOFT	1
CONFIG_MODULE_INIT_INET	0
CONFIG_MODULE_INIT_LOG	1
CONFIG_MODULE_INIT_MCP2515	1
CONFIG_MODULE_INIT_NETWORK_INTERFACE	0
CONFIG_MODULE_INIT_NRF24L01	1
CONFIG_MODULE_INIT_OWI	1
CONFIG_MODULE_INIT_PIN	1
CONFIG_MODULE_INIT_PING	0
CONFIG_MODULE_INIT_PWM	1
CONFIG_MODULE_INIT_PWM_SOFT	1
CONFIG_MODULE_INIT_RANDOM	0
CONFIG_MODULE_INIT_RWLOCK	1
CONFIG_MODULE_INIT_SD	1
CONFIG_MODULE_INIT_SEM	1
CONFIG_MODULE_INIT_SETTINGS	1
CONFIG_MODULE_INIT_SOCKET	0
CONFIG_MODULE_INIT_SPI	1
CONFIG_MODULE_INIT_SSL	0
CONFIG_MODULE_INIT_STD	1
CONFIG_MODULE_INIT_THRD	1
CONFIG_MODULE_INIT_TIMER	1
CONFIG_MODULE_INIT_UART	1
CONFIG_MODULE_INIT_UART_SOFT	1
CONFIG_MODULE_INIT_UPGRADE	0
CONFIG_MODULE_INIT_USB	0
CONFIG_MODULE_INIT_USB_DEVICE	0
CONFIG_MODULE_INIT_USB_HOST	0
CONFIG_MODULE_INIT_WATCHDOG	1
CONFIG_MONITOR_THREAD	1
CONFIG_MONITOR_THREAD_PERIOD_US	2000000
CONFIG_NRF24L01	1
CONFIG_NVM_EEPROM_SOFT	0
CONFIG_NVM_EEPROM_SOFT_BLOCK_0_SIZE	16384
CONFIG_NVM_EEPROM_SOFT_BLOCK_1_SIZE	16384
CONFIG_NVM_EEPROM_SOFT_CHUNK_SIZE	(CONFIG_NVM_SIZE + 8)
CONFIG_NVM_EEPROM_SOFT_FLASH_DEVICE_INDEX	0
CONFIG_NVM_SIZE	256
CONFIG_OWI	1
CONFIG_PANIC_ASSERT	1
CONFIG_PIN	1
CONFIG_PREEMPTIVE_SCHEDULER	0
CONFIG_PROFILE_STACK	1
CONFIG_PWM	1
CONFIG_PWM_SOFT	1
CONFIG_RANDOM	0
CONFIG_SD	1
CONFIG_SETTINGS_AREA_SIZE	256
CONFIG_SETTINGS_BLOB	1
CONFIG_SHELL_COMMAND_MAX	64
CONFIG_SHELL_HISTORY_SIZE	768
CONFIG_SHELL_MINIMAL	0
CONFIG_SHELL_PROMPT	"$ "
CONFIG_SHT3XD	0
CONFIG_SOAM_EMBEDDED_DATABASE	0
CONFIG_SOCKET_RAW	1
CONFIG_SPC5_BOOT_ENTRY_RCHW	1
CONFIG_SPC5_RAM_CLEAR_ALL	1
CONFIG_SPI	1
CONFIG_SPIFFS	0
CONFIG_START_CONSOLE	CONFIG_START_CONSOLE_UART
CONFIG_START_CONSOLE_DEVICE_INDEX	0
CONFIG_START_CONSOLE_UART_BAUDRATE	38400
CONFIG_START_CONSOLE_UART_RX_BUFFER_SIZE	32
CONFIG_START_CONSOLE_USB_CDC_CONTROL_INTERFACE	0
CONFIG_START_CONSOLE_USB_CDC_ENDPOINT_IN	2
CONFIG_START_CONSOLE_USB_CDC_ENDPOINT_OUT	3
CONFIG_START_CONSOLE_USB_CDC_WAIT_FOR_CONNETION	1
CONFIG_START_FILESYSTEM	0
CONFIG_START_FILESYSTEM_ADDRESS	0
CONFIG_START_FILESYSTEM_SIZE	65536
CONFIG_START_NETWORK	0
CONFIG_START_NETWORK_INTERFACE_WIFI_CONNECT_TIMEOUT	30
CONFIG_START_NETWORK_INTERFACE_WIFI_PASSWORD	MyWiFiPassword
CONFIG_START_NETWORK_INTERFACE_WIFI_SSID	MyWiFiSSID
CONFIG_START_NVM	1
CONFIG_START_SHELL	1
CONFIG_START_SHELL_PRIO	30
CONFIG_START_SHELL_STACK_SIZE	768
CONFIG_START_SOAM	0
CONFIG_START_SOAM_PRIO	30
CONFIG_START_SOAM_STACK_SIZE	840
CONFIG_STD_OUTPUT_BUFFER_MAX	16
CONFIG_SYSTEM_INTERRUPTS	1
CONFIG_SYSTEM_INTERRUPT_STACK_SIZE	0
CONFIG_SYSTEM_TICK_FREQUENCY	100
CONFIG_SYSTEM_TICK_SOFTWARE	0
CONFIG_SYS_CONFIG_STRING	1
CONFIG_SYS_LOG_MASK	LOG_UPTO(INFO)
CONFIG_SYS_PANIC_KICK_WATCHDOG	0
CONFIG_SYS_RESET_CAUSE	1
CONFIG_SYS_SIMBA_MAIN_STACK_MAX	4096
CONFIG_THRD_CPU_USAGE	1
CONFIG_THRD_DEFAULT_LOG_MASK	LOG_UPTO(INFO)
CONFIG_THRD_ENV	1
CONFIG_THRD_IDLE_STACK_SIZE	156
CONFIG_THRD_MONITOR_STACK_SIZE	256
CONFIG_THRD_SCHEDULED	1
CONFIG_THRD_STACK_HEAP	0
CONFIG_THRD_STACK_HEAP_SIZE	0
CONFIG_THRD_TERMINATE	1
CONFIG_TIME_UNIX_TIME_TO_DATE	1
CONFIG_UART	1
CONFIG_UART_SOFT	1
CONFIG_USB	0
CONFIG_USB_DEVICE	0
CONFIG_USB_DEVICE_PID	0x8037
CONFIG_USB_DEVICE_VID	0x2341
CONFIG_USB_HOST	0
CONFIG_WATCHDOG	1

Homepage

https://www.arduino.cc/en/Main/ArduinoBoardMega

Mcu

atmega2560<../library-reference/mcus/atmega2560>