Here some bare metal codes for arm-Cortex M4 based stm32f446re microcontroller.
esp8266
microcontroller
embedded
remote-control
microcontrollers
firmware
stm32
dht22
uart
stm32f4
bare-metal
am2302
embedded-c
uart-interface
stm32f446re
microcontroller-firmware
stm32f446re-nucleo
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Updated
Sep 15, 2023 - Assembly