stm32f4_uart_util.c File Reference

Provides common calculations for UART channels. More...

#include "stm32f4_uart_util.h"

Include dependency graph for stm32f4_uart_util.c:

Functions
uint16_t	stm32f4_hal_compute_uart_bd (uint32_t periph_clk, uint32_t baud_rate)
	Calculate the 16 bit register value for a desired baud rate. More...

Detailed Description

Provides common calculations for UART channels.

Copyright (c) 2025 Cory McKiel. Licensed under the MIT License. See LICENSE file in the project root.

Function Documentation

stm32f4_hal_compute_uart_bd()

uint16_t stm32f4_hal_compute_uart_bd	(	uint32_t	periph_clk,
		uint32_t	baud_rate
	)

Calculate the 16 bit register value for a desired baud rate.

The UART channels each have a baud rate register that determines the rate. (USARTX->BRR). This function calculates the correct value given the clock to the peripheral and the desired baud rate.

Parameters

periph_clk	The frequency the peripheral is clocked at in Hz.
baud_rate	The desired baud rate. Some common values: 9600, 19200, 38400, 57600, 115200.

Returns

The value to place directly into the Baud Rate Register (BRR).