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")
```
48 lines
2.2 KiB
Markdown
48 lines
2.2 KiB
Markdown
---
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layout: download
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board_id: "datanoise_picoadk"
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title: "PicoADK - Audio Development Kit Download"
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name: "PicoADK - Audio Development Kit"
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manufacturer: "DatanoiseTV"
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board_url:
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- "https://www.tindie.com/products/datanoisetv/picoadk-audio-development-kit-raspberry-rp2040/"
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board_image: "datanoise_picoadk.jpg"
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date_added: 2023-07-28
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family: raspberrypi
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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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---
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The PicoADK is a RP2040 based Audio Development Kit, which allows you to build your own digital oscillators, synthesizers, noise boxes and experiment around. It has all the base features of the Raspberry Pico / RP2040, plus a high quality Audio Output, 8 Analog Inputs for connecting potentiometers, control voltage from Eurorack systems or even additional input signals.
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#### Why did you make it?
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I made it initially for myself to build digital oscillators for a hybrid synth and to experiment with the RP2040 as a DSP.
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#### What makes it special?
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It has a 32-bit Audio Codec and an SPI 8x 12-bit ADC and is only longer by 4 pins on each side than the Raspberry Pico!
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#### Specifications
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- RP2040 Dual Core 133MHz Cortex M0+ (running at 2x 400MHz Overclocked in the RTOS Template)
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- 2MB Flash (plenty for synthesizers and sound generators)
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- Very low noise LDO regulators (separate LDO for digital circuits and separate for analog circuits)
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- No switching regulators
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- Pin-compatible with RP2040 (besides a few pins internally used or rearranged)
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- PCM5100A 32-bit, up to 384KHz I2S Audio Codec
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- Dedicated Boot and Reset Buttons
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- 8 channel 12-bit ADC with up to 1MS/s, with selectable 3.3V range (on-board low-noise power supply) or range up to 5V via external VREF
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- Low-Pass filter on each ADC input (fMax=48 KHz) at low-impedance (100 Ohm). With 5V VREF suitable for CV (no overvoltage protection, unipolar)
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- Series resistors on ADC SPI to improve signal integrity and reduce crosstalk
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- Symbols marking special pin functions on the pin headers
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- 4 LEDs on shared GPIO2-5 for debugging
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- GPIO15 is hard-wired to a LED
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- ESD Protection on USB
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- SWD Debug Port
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## Purchase
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* [Tindie](https://www.tindie.com/products/datanoisetv/picoadk-audio-development-kit-raspberry-rp2040/)
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