86ca3fec6c
* change blink to use PICO_DEFAULT_LED_PIN to support other boards * also update pio/pwm and picoboard/blinky system/hello_double_tap
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/**
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "hardware/gpio.h"
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const uint LED_PIN = PICO_DEFAULT_LED_PIN;
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const uint DOT_PERIOD_MS = 100;
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const char *morse_letters[] = {
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".-", // A
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"-...", // B
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"-.-.", // C
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"-..", // D
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".", // E
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"..-.", // F
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"--.", // G
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"....", // H
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"..", // I
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".---", // J
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"-.-", // K
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".-..", // L
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"--", // M
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"-.", // N
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"---", // O
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".--.", // P
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"--.-", // Q
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".-.", // R
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"...", // S
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"-", // T
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"..-", // U
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"...-", // V
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".--", // W
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"-..-", // X
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"-.--", // Y
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"--.." // Z
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};
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void put_morse_letter(const char *pattern) {
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for (; *pattern; ++pattern) {
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gpio_put(LED_PIN, 1);
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if (*pattern == '.')
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sleep_ms(DOT_PERIOD_MS);
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else
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sleep_ms(DOT_PERIOD_MS * 3);
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gpio_put(LED_PIN, 0);
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sleep_ms(DOT_PERIOD_MS * 1);
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}
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sleep_ms(DOT_PERIOD_MS * 2);
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}
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void put_morse_str(const char *str) {
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for (; *str; ++str) {
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if (*str >= 'A' && *str < 'Z') {
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put_morse_letter(morse_letters[*str - 'A']);
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} else if (*str >= 'a' && *str < 'z') {
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put_morse_letter(morse_letters[*str - 'a']);
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} else if (*str == ' ') {
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sleep_ms(DOT_PERIOD_MS * 4);
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}
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}
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}
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int main() {
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gpio_init(LED_PIN);
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gpio_set_dir(LED_PIN, GPIO_OUT);
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while (true) {
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put_morse_str("Hello world");
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sleep_ms(1000);
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}
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}
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