mirror of
https://github.com/RIOT-OS/RIOT.git
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1d11a2a281
Fix flashing with `MOST_RECENT_PORT=1` by detecting the board when either in RIOT mode or in bootloader mode (which matches different USB vendor and model strings). Support for programming with the nrf52-u2f bootloader was dropped apparently, but the documentation still recommends that over the Arduino Bootloader. This brings doc and code in sync.
61 lines
2.0 KiB
Plaintext
61 lines
2.0 KiB
Plaintext
/**
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@defgroup boards_wemos-zero WeMos Arduino Zero Clone
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@ingroup boards
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@brief Support for the WeMos Arduino Zero Clone board.
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## Overview
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The WeMos Zero is a cheap clone of Arduino Zero featuring a ATSAMD21G18A.
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Unlike the original Zero, it does not include an embedded debugger/programmer.
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Instead, the [UF2 Bootloader](https://github.com/microsoft/uf2-samdx1) is
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used to program this board. The SAMD21 is a ARM Cortex-M0+ micro-controller.
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It has 256KiB of flash memory and 32KiB of RAM.
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Note: The official Arduino Zero using the native USB port and the Adafruit
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Metro M0 Express should also work with board definition.
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## Hardware
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### MCU
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| MCU | ATSAMD21G18A |
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|:------------- |:------------------------------------- |
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| Family | ARM Cortex-M0+ |
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| Vendor | Atmel |
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| RAM | 32KiB |
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| Flash | 256KiB |
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| Frequency | up to 48MHz |
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| FPU | no |
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| Timers | 6 (1x 16-bit, 2x 24-bit, 3x 32-bit) |
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| ADCs | 6x 12-bit channels) |
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| UARTs | 2 |
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| SPIs | max 6 (see UART) |
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| I2Cs | max 6 (see UART) |
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| Vcc | 1.8V - 3.6V |
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| Datasheet | [Datasheet](http://ww1.microchip.com/downloads/en/DeviceDoc/SAM_D21_DA1_Family_Data%20Sheet_DS40001882E.pdf) |
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### User Interface
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1 LED:
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| Device | PIN |
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|:------ |:---- |
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| LED0 | PA17 |
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## Flashing the device
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Assuming the Arduino Bootloader is installed, just run:
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```
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make BOARD=wemos-zero flash
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```
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Hint: You can you press the reset button twice to manually enter the bootloader.
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This is helpful if the board has crashed (e.g. due to a failed assert() during
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start up).
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*/
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