mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-07-09 22:08:42 +02:00
Kevin Thomas
e54c756423
Rust (all 15 projects):
- Refactored overlength functions: format_counter, format_u8, format_f32_1,
format_u32_minimal, gpio_drive, read_sensor, poll_sensor, format_round_trip,
format_u32, prepare_write_buf, write_min_digits, write_temp, UartDriver::init,
init_spi, angle_to_pulse_us, compute_servo_level
- Added 200+ docstrings to test functions, mock structs, impl blocks
- Fixed pub static comments (//) to doc comments (///) in all main.rs files
- Fixed helper function ordering (helpers above callers)
- Fixed Fn(u32) -> FnMut(u32) bound in button poll_button
- Moved OneShot trait import from main.rs to board.rs in adc project
- Added unsafe {} blocks in flash unsafe fn bodies (Rust 2024 edition)
- Removed unused hal::Clock imports from pwm/servo main.rs
- All 15 projects build with zero errors and zero warnings
C Pico SDK (all 15 projects):
- Added docstrings to all public functions, macros, and static variables
- All 15 projects rebuilt with zero errors
Cleanup:
- Removed build/ and target/ directories from git tracking
- Added target/ to .gitignore
- Deleted temporary fix_rust_docs.py script
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/**
|
|
******************************************************************************
|
|
* @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.
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
#include "rp2350_pwm.h"
|
|
#include "rp2350_uart.h"
|
|
#include "rp2350_delay.h"
|
|
|
|
#define SWEEP_STEP 5
|
|
#define SWEEP_DELAY_MS 50
|
|
|
|
/**
|
|
* @brief Convert a uint8_t to a decimal string.
|
|
* @param value number to convert (0-255)
|
|
* @param buf output buffer (at least 4 bytes)
|
|
* @retval None
|
|
*/
|
|
static void _uint8_to_str(uint8_t value, char *buf)
|
|
{
|
|
uint8_t idx = 0;
|
|
if (value >= 100)
|
|
buf[idx++] = (char)('0' + value / 100);
|
|
if (value >= 10)
|
|
buf[idx++] = (char)('0' + (value / 10) % 10);
|
|
buf[idx++] = (char)('0' + value % 10);
|
|
buf[idx] = '\0';
|
|
}
|
|
|
|
/**
|
|
* @brief Print a duty percentage value as a decimal string over UART.
|
|
* @param duty duty cycle value (0-100)
|
|
* @retval None
|
|
*/
|
|
static void _print_duty(uint8_t duty)
|
|
{
|
|
char buf[4];
|
|
_uint8_to_str(duty, buf);
|
|
uart_puts("Duty: ");
|
|
uart_puts(buf);
|
|
uart_puts("%\r\n");
|
|
}
|
|
|
|
/**
|
|
* @brief Sweep duty cycle upward from 0 to 100 percent.
|
|
* @retval None
|
|
*/
|
|
static void _sweep_up(void)
|
|
{
|
|
for (uint8_t duty = 0; duty <= 100; duty += SWEEP_STEP) {
|
|
pwm_set_duty(duty);
|
|
_print_duty(duty);
|
|
delay_ms(SWEEP_DELAY_MS);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Sweep duty cycle downward from 100 to 0 percent.
|
|
* @retval None
|
|
*/
|
|
static void _sweep_down(void)
|
|
{
|
|
for (int8_t duty = 100; duty >= 0; duty -= SWEEP_STEP) {
|
|
pwm_set_duty((uint8_t)duty);
|
|
_print_duty((uint8_t)duty);
|
|
delay_ms(SWEEP_DELAY_MS);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Application entry point for the PWM LED breathing demo.
|
|
* @retval int does not return
|
|
*/
|
|
int main(void)
|
|
{
|
|
uart_puts("PWM initialized: GPIO25\r\n");
|
|
while (1) {
|
|
_sweep_up();
|
|
_sweep_down();
|
|
}
|
|
}
|