Embedded protocols
This hub groups low-level calculators for firmware bring-up, serial traffic checks, I2C electrical limits, and STM32 timer configuration.
Calculate CRC-16/Modbus from ASCII or hex bytes and append the RTU low-byte/high-byte checksum to a request frame.
Find the safe I2C pull-up resistor window from NXP timing formulas and choose a standard E12 value.
Find STM32 timer prescaler and auto-reload values for a target frequency, including APB prescaler timer clock behavior.
Start with the calculator that matches the debug task, then follow its how-to guide for formula details and its related tools for adjacent checks. This keeps each page focused while still building a coherent embedded topic cluster.