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The variant with HW-819 is easier to buy these days and identical to the original wemos-zero variant including the swapped D2/D4 pins. Co-authored-by: mguetschow <mikolai.guetschow@tu-dresden.de>
62 lines
2.1 KiB
Plaintext
62 lines
2.1 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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These boards either have a silkscreen "WeMos" or "HW-910" label on their back.
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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 this 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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