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hello_uart.c
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hello_uart.c
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/**
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/uart.h"
/// \tag::hello_uart[]
#define UART_ID uart0
#define BAUD_RATE 115200
// We are using pins 0 and 1, but see the GPIO function select table in the
// datasheet for information on which other pins can be used.
#define UART_TX_PIN 0
#define UART_RX_PIN 1
int main() {
// Set up our UART with the required speed.
uart_init(UART_ID, BAUD_RATE);
// Set the TX and RX pins by using the function select on the GPIO
// Set datasheet for more information on function select
gpio_set_function(UART_TX_PIN, UART_FUNCSEL_NUM(UART_ID, UART_TX_PIN));
gpio_set_function(UART_RX_PIN, UART_FUNCSEL_NUM(UART_ID, UART_RX_PIN));
// Use some the various UART functions to send out data
// In a default system, printf will also output via the default UART
// Send out a character without any conversions
uart_putc_raw(UART_ID, 'A');
// Send out a character but do CR/LF conversions
uart_putc(UART_ID, 'B');
// Send out a string, with CR/LF conversions
uart_puts(UART_ID, " Hello, UART!\n");
}
/// \end::hello_uart[]