mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
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Kevin Thomas
106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/**
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* @file 0x001d_static-conditionals.c
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* @brief Static conditionals: if/else and switch with servo sweep
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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 static (compile-time known) conditionals using if/else if/else
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* and switch/case statements. Also sweeps a servo on GPIO6 between 0 and
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* 180 degrees each iteration.
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*
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* Wiring:
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* GPIO6 -> Servo signal wire (orange/white)
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* 5V -> Servo VCC (red)
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* GND -> Servo GND (brown/black)
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "servo.h"
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/** @brief GPIO pin number for the servo */
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#define SERVO_GPIO 6
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/**
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* @brief Print choice value using if/else if/else conditional
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*
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* @details Prints "1", "2", or "?" depending on the choice value.
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*
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* @param choice integer value to evaluate
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* @retval None
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*/
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static void print_if_else(int choice) {
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if (choice == 1) {
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printf("1\r\n");
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} else if (choice == 2) {
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printf("2\r\n");
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} else {
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printf("?\r\n");
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}
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}
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/**
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* @brief Print choice value using switch/case conditional
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*
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* @details Prints "one", "two", or "??" depending on the choice value.
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*
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* @param choice integer value to evaluate
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* @retval None
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*/
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static void print_switch(int choice) {
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switch (choice) {
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case 1: printf("one\r\n"); break;
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case 2: printf("two\r\n"); break;
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default: printf("??\r\n");
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}
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}
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/**
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* @brief Sweep servo between 0 and 180 degrees
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*
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* @details Sets the servo to 0 degrees, waits 500ms, then sets
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* to 180 degrees and waits 500ms.
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*
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* @retval None
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*/
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static void sweep_servo(void) {
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servo_set_angle(0.0f);
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sleep_ms(500);
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servo_set_angle(180.0f);
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sleep_ms(500);
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}
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int main(void) {
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stdio_init_all();
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int choice = 1;
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servo_init(SERVO_GPIO);
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while (true) {
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print_if_else(choice);
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print_switch(choice);
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sweep_servo();
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}
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} |