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diff --git a/bootloader/README.md b/bootloader/README.md index a6ab1626..83d9c622 100644 --- a/bootloader/README.md +++ b/bootloader/README.md @@ -1,5 +1,22 @@ # Bootloader +## Bootloader graphic +The bootloader loads a graphic (Pinetime logo) from the SPI Flash memory. If this graphic is not loaded in the memory, the LCD will display garbage (the content of the SPI flash memory). + +The SPI Flash memory is not accessible via the SWD debugger. Use the firmware 'pinetime-graphics' to load the graphic into memory. All you have to do is build it and program it at address 0x00 : + + - Build: +``` +$ make pinetime-graphics +``` + + - Program (using OpenOCD for example) : +``` +program pinetime-graphics.bin 0 +``` + + - Let it run for ~10s (it does nothing for 5 seconds, then write the logo into the SPI memory, then (slowly) displays it on the LCD). + ## Bootloader binary The binary comes from https://github.com/lupyuen/pinetime-rust-mynewt/releases/tag/v4.1.7 |