This is a very simple demo that can be used as a template for new projects. It configures I2C and UART to read a preasure from I2C sensor and print value via UART. When build with debug configuration it also uses semihosting. It should work with minor changes in all STM32L0 devices and with a few more changes on other microcontrollers.
In first step remember to select proper STM32L0 family for stm32l0xx-hal in Cargo.toml and ensure that memory.x reflects your device memory configuration.
To build project:
# cargo build
For release version (without semihosting), first switch panic hadler in Cargo.toml to panic-halt and:
# cargo build --release
To load binary using OpenOCD and ST-link:
# ./openocd_flash.sh target/thumbv6m-none-eabi/debug/stm32_blink
or:
# ./openocd_flash.sh target/thumbv6m-none-eabi/release/stm32_blink
To start gdb for debugging:
# ./openocd_session.sh
And in second terminal:
# ./gdb_session.sh target/thumbv6m-none-eabi/debug/stm32_blink