Atmega MEGA1284P-XPLAINED

The MEGA1284P-XPLAINED is a development board for the Atmega1284P from Microchip/Atmel.

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Microchip/Atmega MEGA1284P-XPLAINED

Features

  • Atmega1284P MCU, 128K FLASH, 16K SRAM

  • 11.0592 MHz crystal

  • 32768 Hz crystal

  • Embedded AVR911 compatible programmer

  • Reset button

  • 4 user buttons (3 switch and 1 touch button)

  • 4 LEDs indicator (connected to PWM pins)

  • Light sensor

  • NTC sensor

  • Not populated external SPI Flash with labels: AT45DB and AT25DF

  • Power indicator LED

Pin Mapping

Pin

Signal

Notes

P0.24

Blue LED

Active LOW

P0.23

Red LED

Active LOW

P0.22

Green LED

Active LOW

P0.20

UART TX

P0.19

UART RX

Configurations

nsh

Basic NuttShell configuration (console enabled in USART0, pins PD0 (RXD0) and PD1 (TXD0), at 115200 bps).

Compile

Note that build with GCC disables CONFIG_DEBUG_OPT_UNUSED_SECTIONS by default. This is because the linker script was not checked to determine if it properly prevents removal of sections which the linker considers unreferenced but which must be present in the binary.

Flash & Debug

You can flash the board using avrdure. First press and hold SW0 button, then press and release RESET button, after 1 second release the SW0 button. Now run the command:

$ avrdude -p atmega1284p -c avr910 -P /dev/ttyACM0 -b57600 -F -u -U flash:w:nuttx.hex:i