kdmukai

Overview of Esp32 + lvgl + MicroPython + SeedSigner

Overview of each dev layer and their purpose.

Esp32 C/C++ resources

Include and compile hardware drivers for the platform.

Basic esp-idf components

Core project dependencies are declared in idf_component.yml.

kdmukai

OTF fonts

OTFs have to be converted to TTF first.

see: https://convertio.co/otf-ttf/

TTF fonts

Use the official web-based converter: https://lvgl.io/tools/fontconverter

• Bpp:

kdmukai

Fund Keith Mukai's FOSS Work

I am the volunteer Lead Dev for SeedSigner. We are NOT a company. The FOSS project makes no profit whatsoever from our work.

Your support to help fund my open-source dev work would be hugely appreciated!

---

Holiday Donation Drive

kdmukai

    def start(self):
        """Displays a screensaver until user presses a button or touch"""
        anim_frame = 0
        initial_offset = (TOTAL_LINES - len(SPLASH)) // 2
        fg_color = theme.fg_color
        bg_color = theme.bg_color
        self.ctx.display.clear()
        button_press = None

        min_distance = 5  # fixed chars or rows

kdmukai

"""
Copy-paste of various mods to the ST7789 driver to facilitate testing.
"""

# Gamma curve constants for ST7789 display
# Each tuple contains (positive_gamma_values, negative_gamma_values)
GAMMA_CURVES = [
    # Original SeedSigner gamma curve for the Waveshare display hat
    (
        [0xD0, 0x04, 0x0D, 0x11, 0x13, 0x2B, 0x3F, 0x54, 0x4C, 0x18, 0x0D, 0x0B, 0x1F, 0x23],

kdmukai

"""
    Bitcoin Power Law:
    1.0117e-17 * (days since genesis block)^5.82

    Bitcoin Power Law Floor:
    (power law) * 0.42

    Note: Model projections said to be invalid beyond 2040.
"""
import argparse

kdmukai

#!/bin/bash

# Requires: apt install time
export APP_REPO = https://github.com/kdmukai/seedsigner.git
export APP_BRANCH = 0.8.6

touch results.txt
for device in pi0 pi02w pi2 pi4
do
    ccache -d /root/.buildroot-ccache --zero-stats

kdmukai

lvgl

TODO:

• Test basic lvgl_micropython compilation for esp32s3.
• Begin incorporating SeedSigner-styled UI elements from: https://github.com/kdmukai/seedsigner-micropython
• Test to what extent lvgl touch integration comes along "for free".

Live camera integration

• Basic pure MicroPython camera driver / bindings tests.
• Integration with lvgl overlay.

kdmukai

Backup and Restore a Raspi SD Card

Only works on linux. I've repeatedly tried to find a sequence that works on macOS but haven't had any success.

Set up PiShrink

This script will remove empty space from the backup img which ensures that you'll be able to write the img back out to an SD card that's the same size as the source SD card.

git clone https://github.com/Drewsif/PiShrink.git

kdmukai

def get_mnemonic_from_coin_flip_indices(coin_flips: str, wordlist_language_code: str = SettingsConstants.WORDLIST_LANGUAGE__ENGLISH) -> list[str]:
    """
        Interprets a string of 128 or 256 0s and 1s as 11-bit bip39 wordlist indices and
        returns the 12- or 24-word mnemonic.

        Indices are 0-based (i.e. b'00000000000' == 0000 == "abandon")

        Verify with iancoleman.io/bip39 using:
            * "Binary" mode
            * "Mnemonic Length" = "Use raw entropy"