Atmel SAMD21-XPRO

Hardware

Platform Atmel SAM: Atmel | SMART offers Flash- based ARM products based on the ARM Cortex-M0+, Cortex-M3 and Cortex-M4 architectures, ranging from 8KB to 2MB of Flash including a rich peripheral and feature mix.

Microcontroller SAMD21J18A
Frequency 48MHz
Flash 256KB
RAM 32KB
Vendor Atmel

Configuration

Please use samd21_xpro ID for board option in “platformio.ini” (Project Configuration File):

[env:samd21_xpro]
platform = atmelsam
board = samd21_xpro

You can override default Atmel SAMD21-XPRO settings per build environment using board_*** option, where *** is a JSON object path from board manifest samd21_xpro.json. For example, board_build.mcu, board_build.f_cpu, etc.

[env:samd21_xpro]
platform = atmelsam
board = samd21_xpro

; change microcontroller
board_build.mcu = samd21j18a

; change MCU frequency
board_build.f_cpu = 48000000L

Uploading

Atmel SAMD21-XPRO supports the next uploading protocols:

  • cmsis-dap
  • blackmagic
  • jlink
  • atmel-ice

Default protocol is cmsis-dap

You can change upload protocol using upload_protocol option:

[env:samd21_xpro]
platform = atmelsam
board = samd21_xpro

upload_protocol = cmsis-dap

Debugging

PIO Unified Debugger - “1-click” solution for debugging with a zero configuration.

Warning

You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

Atmel SAMD21-XPRO has on-board debug probe and IS READY for debugging. You don’t need to use/buy external debug probe.

Compatible Tools On-board Default
Atmel-ICE    
Black Magic Probe    
CMSIS-DAP Yes Yes
J-LINK    

Frameworks

Name Description
mbed The mbed framework The mbed SDK has been designed to provide enough hardware abstraction to be intuitive and concise, yet powerful enough to build complex projects. It is built on the low-level ARM CMSIS APIs, allowing you to code down to the metal if needed. In addition to RTOS, USB and Networking libraries, a cookbook of hundreds of reusable peripheral and module libraries have been built on top of the SDK by the mbed Developer Community.