mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-06-10 08:13:57 +02:00
Kevin Thomas
afdc1fa594
- GPIO15 active-low button input with internal pull-up - 20ms software debounce via busy-wait confirmation - LED mirrors button state, UART reports edge transitions - New gpio_config_input_pullup() in GPIO driver - 1555B FLASH, 13 source files, zero warnings
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/**
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******************************************************************************
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* @file rp2350_uart.h
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* @author Kevin Thomas
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* @brief UART0 driver header for RP2350.
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*
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* Bare-metal UART0 driver supporting TX/RX on GPIO 0/1 at
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* 115200 baud (14.5 MHz XOSC clock).
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2026 Kevin Thomas.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#ifndef __RP2350_UART_H
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#define __RP2350_UART_H
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#include "rp2350.h"
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/**
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* @brief Release UART0 from reset and wait until ready.
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* @retval None
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*/
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void uart_release_reset(void);
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/**
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* @brief Initialize UART0 pins, baud rate, line control, and enable.
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* @retval None
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*/
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void uart_init(void);
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/**
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* @brief Check whether a received byte is waiting in the UART FIFO.
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* @retval bool true if at least one byte is available
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*/
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bool uart_is_readable(void);
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/**
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* @brief Read one character from UART0 (blocking).
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* @retval char the received character
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*/
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char uart_getchar(void);
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/**
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* @brief Transmit one character over UART0 (blocking).
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* @param c character to transmit
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* @retval None
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*/
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void uart_putchar(char c);
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/**
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* @brief Transmit a null-terminated string over UART0.
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* @param str pointer to the string to send
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* @retval None
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*/
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void uart_puts(const char *str);
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/**
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* @brief Convert a lowercase ASCII character to uppercase.
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* @param c input character
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* @retval char uppercase equivalent or original character
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*/
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char uart_to_upper(char c);
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#endif /* __RP2350_UART_H */
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