mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
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Kevin Thomas
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/**
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* FILE: usart.h
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*
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* DESCRIPTION: This file contains the usart function definitions utilizing the STM32F401CC6 microcontroller.
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*
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* AUTHOR: Kevin Thomas
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* DATE: October 6, 2023
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*/
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#ifndef USART_H
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#define USART_H
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#include <stdint.h>
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#include "stm32f4xx.h"
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#define DEFAULT_CLK_SPEED 16000000U
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extern int __io_putchar(int ch) __attribute__((weak));
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/**
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* @brief Sets the baud rate for a given USART peripheral.
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*
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* This function calculates and sets the baud rate register (BRR) for
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* the specified USART peripheral based on the provided peripheral clock
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* speed and desired baud rate.
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*
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* @param USARTx: Pointer to the USART peripheral (e.g., USART1, USART2, etc.).
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* @param periph_clk: The frequency of the peripheral clock in Hertz.
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* @param baud_rate: The desired baud rate for communication.
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* @retval None
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*/
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static void set_baud_rate(USART_TypeDef *USARTx, uint32_t periph_clk, uint32_t baud_rate);
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/**
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* @brief Initializes USART2 for transmission on PA2 pin.
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*
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* This function configures the necessary settings for USART2 to enable
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* transmission on pin PA2. It includes configuring GPIO, setting
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* alternate function mode, configuring the USART clock, setting the
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* baud rate, and enabling the transmitter.
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*
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* @param None
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* @retval None
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*/
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void usart2_tx_init(void);
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/**
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* @brief Writes a single byte to USART2 for transmission.
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*
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* This function writes a single byte to the USART2 transmit data
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* register for transmission. It ensures that the transmit data register
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* is empty before writing the byte.
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*
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* @param ch: The byte to be transmitted.
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* @retval None
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*/
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void usart2_write(uint8_t ch);
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#endif // USART_H
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