Convert PNG graphic to Triple Colour and RGB565 for Grove E-Ink Display, ST7789, PineTime Watch Faces and PineTime Bootloader

Triple Colour Image for Grove E-Ink Display

To convert the PNG image uart-cartoon2.png (202 x 104 resolution) to C arrays image_black.inc (black bitmap) and image_red.inc (red bitmap)...

# Download the source code
git clone https://github.com/lupyuen/pinetime-graphic
cd pinetime-graphic

# TODO: Copy uart-cartoon2.png to the pinetime-graphic folder

# Convert the PNG file to a C array (black bitmap) with these min and max thresholds
cargo run -- --min 0  --max 85  uart-cartoon2.png >image_black.inc

# Convert the PNG file to a C array (red bitmap) with these min and max thresholds
cargo run -- --min 86 --max 215 uart-cartoon2.png >image_red.inc

Read the article "PineCone BL602 Talks UART to Grove E-Ink Display"

ST7789 Image

To convert the PNG image image.png (240 x 240 resolution or smaller) to a C array image.inc...

# Download the source code
git clone https://github.com/lupyuen/pinetime-graphic
cd pinetime-graphic

# TODO: Copy image.png to the pinetime-graphic folder

# Convert the PNG file to a C array
cargo run -v image.png >image.inc

Read the article "PineCone BL602 Blasting Pixels to ST7789 Display with LVGL Library"

PineTime Watch Face

To convert the PNG image 0.png (240 x 240 resolution or smaller) to RGB565 image 0.bin...

# Download the source code
git clone https://github.com/lupyuen/pinetime-graphic
cd pinetime-graphic

# TODO: Copy 0.png to the pinetime-graphic folder

# Convert the PNG file to a C array
cargo run -v 0.png >pinetime-graphic.inc

# Compile the C array
gcc -o export-bin export-bin.c

# Export the C array as an RGB565 binary file
./export-bin
mv pinetime-graphic.bin 0.bin

Read the article "Draw your own PineTime Watch Face... From WebAssembly to Embedded Rust"

PineTime Bootloader

To convert the file pinetime-graphic.png (240 x 240 resolution) to an RGB565 binary file pinetime-graphic.bin...

# Download the source code
git clone https://github.com/lupyuen/pinetime-graphic
cd pinetime-graphic

# TODO: Copy pinetime-graphic.png to the pinetime-graphic folder

# Convert the PNG file to a C array
cargo run -v pinetime-graphic.png >pinetime-graphic.inc

# Compile the C array
gcc -o export-bin export-bin.c

# Export the C array as an RGB565 binary file pinetime-graphic.bin
./export-bin

To convert binary file pinetime-graphic.bin to HEX file pinetime-graphic.hex...

arm-none-eabi-objcopy -I binary -O ihex pinetime-graphic.bin pinetime-graphic.hex

Read the article "MCUBoot Bootloader for PineTime Smart Watch (nRF52)"