7ed9e29326
Implement an async flash mode using the XIP background best effort read interface. Only reads are actually async, write and erase remain blocking.
Examples using bootloader
Example for Raspberry Pi Pico demonstrating the bootloader. The example consists of application binaries, 'a' which waits for 5 seconds before flashing the 'b' binary, which blinks the LED.
NOTE: The 'b' binary does not mark the new binary as active, so if you reset the device, it will roll back to the 'a' binary before automatically updating it again.
Prerequisites
cargo-binutilscargo-flashembassy-boot-rp
Usage
# Flash bootloader
cargo flash --manifest-path ../../bootloader/rp/Cargo.toml --release --chip RP2040
# Build 'b'
cargo build --release --bin b
# Generate binary for 'b'
cargo objcopy --release --bin b -- -O binary b.bin
# Flash `a` (which includes b.bin)
cargo flash --release --bin a --chip RP2040