/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    gpio.c
  * @brief   This file provides code for the configuration
  *          of all used GPIO pins.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 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.
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "gpio.h"

/* USER CODE BEGIN 0 */
#include "tim.h"
/* USER CODE END 0 */

/*----------------------------------------------------------------------------*/
/* Configure GPIO                                                             */
/*----------------------------------------------------------------------------*/
/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/** Configure pins
     PA8   ------> RCC_MCO
*/
void MX_GPIO_Init(void)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOC, LED2_Pin|LED3_Pin|PVT4_Pin|PVT3_Pin
                          |PVT2_Pin|PVT1_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, LED0_Pin|LED1_Pin, GPIO_PIN_SET);

  /*Configure GPIO pins : PCPin PCPin PCPin PCPin
                           PCPin */
  GPIO_InitStruct.Pin = IN_06_Pin|SELEKT_PCH_Pin|IN_05_Pin|J2_Pin
                          |J3_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pins : PCPin PCPin PCPin PCPin
                           PCPin PCPin */
  GPIO_InitStruct.Pin = LED2_Pin|LED3_Pin|PVT4_Pin|PVT3_Pin
                          |PVT2_Pin|PVT1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pins : PAPin PAPin PAPin PAPin
                           PAPin PAPin PAPin PAPin */
  GPIO_InitStruct.Pin = IN_04_Pin|IN_03_Pin|IN_02_Pin|IN_01_Pin
                          |IN_14_Pin|IN_13_Pin|J0_Pin|J1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : PBPin PBPin PBPin PBPin
                           PBPin PBPin */
  GPIO_InitStruct.Pin = IN_12_Pin|IN_11_Pin|BOOT1_Pin|IN_10_Pin
                          |IN_09_Pin|IN_08_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pin : PtPin */
  GPIO_InitStruct.Pin = IN_07_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING_FALLING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(IN_07_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : PA8 */
  GPIO_InitStruct.Pin = GPIO_PIN_8;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : PBPin PBPin */
  GPIO_InitStruct.Pin = LED0_Pin|LED1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI15_10_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);

}

/* USER CODE BEGIN 2 */
#define MEASURE_PIN IN_07_Pin
#define MEASURE_PORT IN_07_GPIO_Port
volatile uint32_t last_tick = 0;
volatile uint32_t high_time = 0;
volatile uint32_t period_time = 0;
volatile uint8_t first_edge = 1;

float duty_cycle = 0.0f;
float frequency = 0.0f;
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
    if (GPIO_Pin != MEASURE_PIN) return;

    static uint16_t last_tick = 0;
    static uint16_t low_time = 0;
    static uint16_t high_time = 0;

    uint16_t now = (uint16_t)__HAL_TIM_GET_COUNTER(&htim2);
    uint16_t delta = (now >= last_tick) ? (now - last_tick) : (uint16_t)(0x10000 + now - last_tick);
    last_tick = now;

    if (HAL_GPIO_ReadPin(MEASURE_PORT, MEASURE_PIN) == GPIO_PIN_SET) {
        // RISING → закончился LOW
        low_time = delta;
    } else {
        // FALLING → закончился HIGH
        high_time = delta;
        uint32_t period = (uint32_t)high_time + (uint32_t)low_time;
        if (period > 0) {
            frequency = 1e6f / period;                  // Гц
            duty_cycle = (high_time * 100.0f) / period; // %
        }
    }
}



/* USER CODE END 2 */
