CalvinBackup/Embedded-Hacking
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style: enforce coding standard — headers, @brief on #define, Doxygen on statics, remove _ prefix, max 8 lines per function

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This commit is contained in:
Kevin Thomas
2026-04-16 22:45:11 -04:00
parent 0833c32c94
commit 433263eac0
309 changed files with 10453 additions and 6657 deletions
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drivers/0x04_pwm_cbm/Src/main.c
+41 -30
View File
@@ -1,37 +1,48 @@
/**
******************************************************************************
* @file main.c
* @author Kevin Thomas
* @brief PWM demonstration: LED breathing effect via duty-cycle sweep.
*
* Demonstrates PWM output using the PWM driver. A signal on
* GPIO 25 (onboard LED) sweeps its duty cycle from 0% to 100%
* and back to produce a smooth breathing effect. The current
* duty is reported over UART.
*
* Wiring:
* GPIO0 -> UART TX (USB-to-UART adapter RX)
* GPIO1 -> UART RX (USB-to-UART adapter TX)
* GPIO25 -> Onboard LED (no external wiring needed)
*
******************************************************************************
* @attention
*
* Copyright (c) 2026 Kevin Thomas.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
* @file main.c
* @brief PWM demonstration: LED breathing effect via duty-cycle sweep.
* @author Kevin Thomas
* @date 2026
*
* Demonstrates PWM output using the PWM driver. A signal on
* GPIO 25 (onboard LED) sweeps its duty cycle from 0% to 100%
* and back to produce a smooth breathing effect. The current
* duty is reported over UART.
*
* Wiring:
* GPIO0 -> UART TX (USB-to-UART adapter RX)
* GPIO1 -> UART RX (USB-to-UART adapter TX)
* GPIO25 -> Onboard LED (no external wiring needed)
*
* MIT License
*
* Copyright (c) 2026 Kevin Thomas
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "rp2350_pwm.h"
#include "rp2350_uart.h"
#include "rp2350_delay.h"
/** @brief PWM duty cycle increment per step */
#define SWEEP_STEP 5
/** @brief Delay between PWM sweep steps in milliseconds */
#define SWEEP_DELAY_MS 50
/**
@@ -40,7 +51,7 @@
* @param buf output buffer (at least 4 bytes)
* @retval None
*/
static void _uint8_to_str(uint8_t value, char *buf)
static void uint8_to_str(uint8_t value, char *buf)
{
uint8_t idx = 0;
if (value >= 100)
@@ -59,7 +70,7 @@ static void _uint8_to_str(uint8_t value, char *buf)
static void print_duty(uint8_t duty)
{
char buf[4];
_uint8_to_str(duty, buf);
uint8_to_str(duty, buf);
uart_puts("Duty: ");
uart_puts(buf);
uart_puts("%\r\n");