main.h File Reference

: Header for main.c file. This file contains the common defines of the application. More...

#include "stm32f4xx_hal.h"
#include "bmp180.h"
#include "bh1750.h"
#include "aht20.h"
#include "ring_buffer.h"
#include "filter.h"
#include <math.h>
#include <string.h>
#include <stdio.h>

Go to the source code of this file.

Data Structures
struct	Sensor_Stats_t

Macros
#define	LED_GREEN_Pin   GPIO_PIN_12
#define	LED_GREEN_GPIO_Port   GPIOD

Functions
void	Error_Handler (void)
	This function is executed in case of error occurrence.
void	calculate_statistics (buf_handle_t *p_handle, Sensor_Stats_t *stats)
	Computes min, max, median, and standard deviation from a ring buffer.

Detailed Description

: Header for main.c file. This file contains the common defines of the application.

Attention

Copyright (c) 2026 STMicroelectronics. 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.

Function Documentation

calculate_statistics()

void calculate_statistics	(	buf_handle_t *	p_handle,
		Sensor_Stats_t *	stats )

Computes min, max, median, and standard deviation from a ring buffer.

Parameters

[in]	p_handle	Pointer to the ring buffer handle to analyse.
[out]	stats	Pointer to the Sensor_Stats_t structure to fill.

Computes min, max, median, and standard deviation from a ring buffer.

Iterates over all valid samples in p_handle to find the minimum, maximum and arithmetic mean. A second pass computes the population standard deviation. The buffer is then copied to a temporary array, sorted with bubble_sort(), and the median is extracted.

Note

The function returns immediately if the buffer is empty.

Parameters

[in]	p_handle	Pointer to the ring buffer handle containing the samples.
[out]	stats	Pointer to the Sensor_Stats_t structure to populate.

Error_Handler()

void Error_Handler

(

void

)

This function is executed in case of error occurrence.

Return values

None