Jeff Epler
4715875cc4
.. leading zeros are required for `frontmatter` to treat them as dates
rather than strings, apparently per the YAML specification.
This was done by script:
```py
import re
import datetime
import pathlib
import sys
import frontmatter
rx = re.compile(r'^(\s*)date_added:.*$', re.M)
for path_str in sys.argv[1:]:
print(path_str)
path = pathlib.Path(path_str)
post = frontmatter.load(path)
date_added = post.get("date_added", "")
if isinstance(date_added, datetime.date):
continue
if isinstance(date_added, str):
try:
date_added = datetime.datetime.strptime(date_added, "%Y-%m-%d")
except ValueError as exc:
print(f"Failed to parse date {date_added} in {path_str}: {exc}")
continue
date_added = date_added.date()
content = path.read_text("utf-8")
new_content = rx.sub(lambda m: f"{m.group(1)}date_added: {date_added}", content)
assert content != new_content
path.write_text(new_content, "utf-8")
```
54 lines
3.5 KiB
Markdown
54 lines
3.5 KiB
Markdown
---
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layout: download
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board_id: "qtpy_m0"
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title: "QT Py Download"
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name: "QT Py"
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manufacturer: "Adafruit"
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board_url:
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- "https://www.adafruit.com/product/4600"
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board_image: "qtpy_m0.jpg"
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date_added: 2020-09-28
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family: atmel-samd
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bootloader_id: QTPy_m0
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features:
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- STEMMA QT/QWIIC
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- USB-C
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- Breadboard-Friendly
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- Xiao / QTPy Form Factor
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---
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> **Note:** If you soldered the [optional SOIC-8 SPI Flash chip](https://www.adafruit.com/product/4763) on to your QT Py, see the ["QT Py Haxpress"](../qtpy_m0_haxpress/) page to make use of the extra space!
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What a cutie pie! Or is it... a QT Py? This diminutive dev board comes with our favorite lil chip, the SAMD21 (as made famous in our GEMMA M0 and Trinket M0 boards).
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This time it comes with [our favorite connector - the STEMMA QT](http://adafruit.com/stemma), a chainable I2C port that can be used with [any of our STEMMA QT sensors and accessories](https://www.adafruit.com/category/620).
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[OLEDs](https://www.adafruit.com/?q=qt+oled&main_page=category&cPath=1005&sort=BestMatch)! [Inertial Measurment Units](https://www.adafruit.com/?q=qt+imu&main_page=category&cPath=1005&sort=BestMatch)! [Sensors a-plenty](https://www.adafruit.com/?q=qt+sensor&main_page=category&cPath=1005&sort=BestMatch). All plug-and-play thanks to the innovative chainable design: [SparkFun Qwiic](https://www.sparkfun.com/qwiic)-compatible STEMMA QT connectors for the I2C bus so you don't even need to solder! Just plug in a compatible cable and attach it to your MCU of choice, and you’re ready to load up some software and measure some light.
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Use any [SparkFun Qwiic](http://www.sparkfun.com/qwiic) boards! [Seeed Grove I2C boards](https://www.adafruit.com/product/4528) will also work with this adapter cable.
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Pinout and shape is [Seeed Xiao](https://wiki.seeedstudio.com/Seeeduino-XIAO/) compatible, with castellated pads so you can solder it flat to a PCB. In addition to the QT connector, we also added an **RGB NeoPixel** (with controllable power pin to allow for ultra-low-power usage), **and a reset button** (great for restarting your program, or entering the bootloader)
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Runs Arduino like a dream, and can be used for basic CircuitPython projects. For more advanced usage like datalogging or file storage, solder an SOIC SPI flash chip onto the bottom pads,
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* Same size (20 mm x 17.5 mm), form-factor, and pin-out as Seeed Xiao
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* **ATSAMD21E18** 32-bit Cortex M0+ - 48 MHz 32-bit processor with 256 KB Flash and 32 KB RAM
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* Native USB supported by every OS - can be used in Arduino or CircuitPython as USB serial console, MIDI, Keyboard/Mouse HID, even a little disk drive for storing Python scripts.
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* Can be used with Arduino IDE or CircuitPython
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* Built in RGB NeoPixel LED
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* **11 GPIO pins**:
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* True analog output on one I/O pin - can be used to play 10-bit quality audio clips in Arduino (CircuitPython does not have storage for audio clips)
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* 9 x 12-bit analog inputs (SDA/SCL do not have analog inputs)
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* 1 x Optional AREF on `A1`
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* 9 x PWM outputs (`A0` is analog out, `A1` is not PWM capable)
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* Hardware I2C port with STEMMA QT plug-n-play connector
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* Hardware UART, Hardware SPI, Hardware I2S
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* 6 x Capacitive Touch with no additional components required
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* 3.3 V regulator with [600 mA peak output](https://www.diodes.com/assets/Datasheets/AP2112.pdf)
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* [Optional SOIC-8 SPI Flash chip on bottom](https://www.adafruit.com/product/4763)
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* **Reset switch** for starting your project code over or entering bootloader mode
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* USB-C connector
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## Purchase
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* [Adafruit](https://www.adafruit.com/product/4600)
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