mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-05-18 14:04:48 +02:00
Kevin Thomas
c46bcba401
Public function docstrings belong exclusively in .h headers per coding convention. Only static helper functions and static variables retain docstrings in .c files. Removed 413 duplicate docstrings across 185 files (15 CBM + 15 C SDK projects). All 30 projects rebuild with zero errors.
64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
/**
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* @file 0x01_uart.c
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* @brief UART demonstration: echo received characters back in uppercase
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* @author Kevin Thomas
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* @date 2025
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*
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* MIT License
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*
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* Copyright (c) 2025 Kevin Thomas
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* -----------------------------------------------------------------------------
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*
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* Demonstrates hardware UART0 using the uart driver (uart.h / uart.c).
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* Characters typed into a terminal via a USB-to-UART adapter are echoed
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* back in uppercase, illustrating full-duplex raw UART operation without
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* going through the stdio layer.
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*
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* Wiring:
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* GPIO0 (TX) -> USB-to-UART adapter RX
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* GPIO1 (RX) -> USB-to-UART adapter TX
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* GND -> USB-to-UART adapter GND
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*/
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#include "pico/stdlib.h"
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#include "uart.h"
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/** @brief GPIO pin used for UART0 TX */
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#define UART_TX_PIN 0
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/** @brief GPIO pin used for UART0 RX */
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#define UART_RX_PIN 1
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/** @brief UART baud rate in bits per second */
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#define UART_BAUD 115200
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int main(void) {
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uart_driver_init(UART_TX_PIN, UART_RX_PIN, UART_BAUD);
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uart_driver_puts("UART driver ready (115200 8N1)\r\n");
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uart_driver_puts("Type characters to echo them back in UPPERCASE:\r\n");
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while (true) {
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if (uart_driver_is_readable()) {
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char c = uart_driver_getchar();
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char upper = uart_driver_to_upper(c);
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uart_driver_putchar(upper);
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}
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}
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}
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