Development kit: Raspberry Pico

This is the official development kit. It offers the following advantages:

Low cost
Parts are easy to find
Low wiring/soldering: usage of a motherboard
SWD debug port

Current status: ON DEVELOPMENT

Bill of materials

Here is an example of components.

Links are examples of what to buy, price is not optimized
Use traditional suppliers for generic components (buttons, resistors...), such as Adafruit, PiHut, Pimoroni, Kubii, Gotronic...

Part	Price	Shop	Link
Audio board + speaker	13 €	Waveshare	Buy on Amazon
Raspberry Pico W	9 €	Kubii	Buy on Amazon
2inch LCD (320x240)	14 €	Waveshare	Buy on Amazon
Some push buttons and rotary switches	4 €	Any	Buy on Amazon
UPS module or Pimoroni LiPo Shim	15 €	Waveshare	Buy on Amazon
LiPo battery 500mAh	9 €	Any	Buy on Amazon
GPIO Expander Pico 4 modules	17 €	Waveshare	Buy on Amazon
SDCard breakout board	5 €	Any
TOTAL	86 €

A much more optimization of price is possible using the Marble Pico board which is completely compatible to the original Pico pinout but with embedded battery management and SDCard holder. Price is still low: 5€!

Part	Price	Shop	Link
Audio board + speaker	13 €	Waveshare	Buy on Amazon
Marble Pico	5 €	ArduShop	Buy on Amazon
2inch LCD (320x240)	14 €	Waveshare	Buy on Amazon
Some push buttons and rotary switches	4 €	Any	Buy on Amazon
LiPo battery 500mAh	9 €	Any	Buy on Amazon
GPIO Expander Pico 2 modules	14 €	Waveshare	Buy on Amazon
TOTAL	59 €

In addition to this list, you may need some more materials such as wires, prototype boards, resistors...

We may propose in the future a PCB to help the connection without soldering.

Developers: how to build from the source code

Clone the repository

git clone https://github.com/arabine/open-story-teller

Install build tools

Install build tools, example for a Debian based operating system:

sudo apt install gcc-arm-none-eabi
sudo apt install picolibc-arm-none-eabi

Make sure that CMake will use this cross toolchain. If not, use the following option in the command line during cmake invocation.

cmake -DTOOLCHAIN=arm-none-eabi -DCMAKE_TOOLCHAIN_FILE=cmake/cross-gcc.cmake

Clone the pico SDK inside the software directory:

cd software
git clone https://github.com/raspberrypi/pico-sdk

If you already have the Pico SDK installed somewhere else on your disk, you can create a link. Then, create a build directory and launch the build:

mkdir build
cd build
cmake ..
make

CMake tuning options

cmake  -DCMAKE_BUILD_TYPE=Debug -DOST_BUNDLE=RASPI_PICO -DPICO_SDK_PATH=../pico-sdk -DPICO_BOARD=pico_w ..

Replace the PICO_SDK_PATH value according to your real Pico SDK location if necessary.

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