/**
******************************************************************************
* @file    ow_port.c
* @brief   This file includes the driver for port for OneWire purposes
******************************************************************************
*/
#include "ow_port.h"
#include "onewire.h"
#include "tim.h"

/**
  * @brief  The internal function is used as gpio pin mode
  * @param  OW		OneWire HandleTypedef
  * @param  Mode	Input or Output
  */
void OneWire_Pin_Mode(OneWire_t* OW, PinMode Mode)
{
#if defined(UART_Driver)
#elif defined(CMSIS_Driver)
  volatile uint32_t *config_reg = (OW->DataPinNumb < 8) ? &(OW->DataPort->CRL) : &(OW->DataPort->CRH);
  uint32_t pin_pos = (OW->DataPinNumb < 8) ? (OW->DataPinNumb * 4) : ((OW->DataPinNumb - 8) * 4);
  // —брос текущих 4 бит (CNF + MODE)
  *config_reg &= ~(0xF << pin_pos);

  if (Mode == Input)
  {
      // ¬ход с подт¤жкой или без Ц например, CNF = 0b01, MODE = 0b00
      // «десь устанавливаем вход с подт¤жкой:
      *config_reg |= (0x8 << pin_pos); // CNF=10, MODE=00 (вход с подт¤жкой)
      OW->DataPort->ODR |= (1 << OW->DataPinNumb); // ¬ключить подт¤жку вверх
  }
  else
  {
      // ¬ыход push-pull, 2 ћ√ц Ц MODE = 0b10, CNF = 0b00
      *config_reg |= (0x2 << pin_pos);
  }
#elif defined(LL_Driver)
	if(Mode == Input)
	{
		LL_GPIO_SetPinMode(OW->DataPort, OW->DataPin, LL_GPIO_MODE_INPUT);
	}else{
		LL_GPIO_SetPinMode(OW->DataPort, OW->DataPin, LL_GPIO_MODE_OUTPUT);
	}
#else
	GPIO_InitTypeDef GPIO_InitStruct = {0};
	GPIO_InitStruct.Pin = OW->DataPin;
	if(Mode == Input)
	{
		GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
	}else{
		GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
	}
	HAL_GPIO_Init(OW->DataPort, &GPIO_InitStruct);
#endif
}

/**
  * @brief  The internal function is used as gpio pin level
  * @param  OW		OneWire HandleTypedef
  * @param  Mode	Level: Set/High = 1, Reset/Low = 0
  */
void OneWire_Pin_Level(OneWire_t* OW, uint8_t Level)
{
#if defined(UART_Driver)
#elif defined(CMSIS_Driver)
  if (Level != GPIO_PIN_RESET)
  {
    OW->DataPort->BSRR = OW->DataPin;
  }
  else
  {
    OW->DataPort->BSRR = (uint32_t)OW->DataPin << 16u;
  }
#elif defined(LL_Driver)
	if(Level == 1)
	{
		LL_GPIO_SetOutputPin(OW->DataPort, OW->DataPin);
	}else{
		LL_GPIO_ResetOutputPin(OW->DataPort, OW->DataPin);
	}
#else
	HAL_GPIO_WritePin(OW->DataPort, OW->DataPin, Level);
#endif
}

/**
  * @brief  The internal function is used to read data pin
  * @retval Pin level status
  * @param  OW		OneWire HandleTypedef
  */
uint8_t OneWire_Pin_Read(OneWire_t* OW)
{
#if defined(UART_Driver)
  return 0;
#elif defined(CMSIS_Driver)
	return ((OW->DataPort->IDR & OW->DataPin) != 0x00U) ? 1 : 0;
#elif defined(LL_Driver)
	return ((OW->DataPort->IDR & OW->DataPin) != 0x00U) ? 1 : 0;
#else
	return HAL_GPIO_ReadPin(OW->DataPort, OW->DataPin);
#endif
}

uint32_t tim_1us_period = OW_TIM_1US_PERIOD;
void OneWire_Delay_us(uint32_t us)
{
  uint32_t ticks = us * tim_1us_period;
  uint16_t start = OW_TIM->CNT;
  uint32_t elapsed = 0;
  uint16_t prev = start;

  while (elapsed < ticks)
  {
    uint16_t curr = OW_TIM->CNT;
    uint16_t delta = (uint16_t)(curr - prev);  // учЄт переполнени¤
    elapsed += delta;
    prev = curr;
  }
}