Atmel ATSAMR21-XPRO¶

System¶

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.

Configuration¶

Please use samr21_xpro ID for board option in “platformio.ini” (Project Configuration File):

[env:samr21_xpro]
platform = atmelsam
board = samr21_xpro

You can override default Atmel ATSAMR21-XPRO settings per build environment using board_*** option, where *** is a JSON object path from board manifest samr21_xpro.json. For example, board_build.mcu, board_build.f_cpu, etc.

[env:samr21_xpro]
platform = atmelsam
board = samr21_xpro

; change microcontroller
board_build.mcu = samr21g18a

; change MCU frequency
board_build.f_cpu = 48000000L

Uploading¶

Atmel ATSAMR21-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:samr21_xpro]
platform = atmelsam
board = samr21_xpro

upload_protocol = cmsis-dap

Debugging¶

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

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

Atmel ATSAMR21-XPRO has on-board debug probe and IS READY for debugging. You don’t need to use/buy external debug probe.

Frameworks¶