/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    stm32f1xx_it.c
  * @brief   Interrupt Service Routines.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_it.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "string.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN TD */

/* USER CODE END TD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/* External variables --------------------------------------------------------*/
extern DMA_HandleTypeDef hdma_usart3_rx;
extern DMA_HandleTypeDef hdma_uart4_rx;
extern UART_HandleTypeDef huart3;
extern UART_HandleTypeDef huart4;
extern UART_HandleTypeDef huart2;
extern UART_HandleTypeDef huart1;
extern DMA_HandleTypeDef hdma_usart2_rx;
extern uint8_t  uart2_dma_buf[64];
extern uint8_t  uart2_frame_buf[64];
extern volatile uint16_t uart2_frame_len;
extern volatile uint8_t  uart2_frame_ready;
/* USER CODE BEGIN EV */
#include "network.h"
/* USER CODE END EV */

/******************************************************************************/
/*           Cortex-M3 Processor Interruption and Exception Handlers          */
/******************************************************************************/
/**
  * @brief This function handles Non maskable interrupt.
  */
void NMI_Handler(void)
{
  /* USER CODE BEGIN NonMaskableInt_IRQn 0 */

  /* USER CODE END NonMaskableInt_IRQn 0 */
  /* USER CODE BEGIN NonMaskableInt_IRQn 1 */

  /* USER CODE END NonMaskableInt_IRQn 1 */
}

/**
  * @brief This function handles Hard fault interrupt.
  */
void HardFault_Handler(void)
{
  /* 硬件错误兜底：用轮询方式往 USART1 打一条消息（中断已不可靠），
   * 之后停在这里由 IWDG 复位。串口看到 "HARD FAULT" 即说明发生过硬错误 */
  {
    static const char msg[] = "\r\n!!! HARD FAULT, wait IWDG reset !!!\r\n";
    for (unsigned i = 0; i < sizeof(msg) - 1; i++) {
      while ((USART1->SR & USART_SR_TXE) == 0) { }
      USART1->DR = msg[i];
    }
  }
  while (1)
  {
    /* USER CODE BEGIN W1_HardFault_IRQn 0 */
    /* USER CODE END W1_HardFault_IRQn 0 */
  }
}

/**
  * @brief This function handles Memory management fault.
  */
void MemManage_Handler(void)
{
  /* USER CODE BEGIN MemoryManagement_IRQn 0 */

  /* USER CODE END MemoryManagement_IRQn 0 */
  while (1)
  {
    /* USER CODE BEGIN W1_MemoryManagement_IRQn 0 */
    /* USER CODE END W1_MemoryManagement_IRQn 0 */
  }
}

/**
  * @brief This function handles Prefetch fault, memory access fault.
  */
void BusFault_Handler(void)
{
  /* USER CODE BEGIN BusFault_IRQn 0 */

  /* USER CODE END BusFault_IRQn 0 */
  while (1)
  {
    /* USER CODE BEGIN W1_BusFault_IRQn 0 */
    /* USER CODE END W1_BusFault_IRQn 0 */
  }
}

/**
  * @brief This function handles Undefined instruction or illegal state.
  */
void UsageFault_Handler(void)
{
  /* USER CODE BEGIN UsageFault_IRQn 0 */

  /* USER CODE END UsageFault_IRQn 0 */
  while (1)
  {
    /* USER CODE BEGIN W1_UsageFault_IRQn 0 */
    /* USER CODE END W1_UsageFault_IRQn 0 */
  }
}

/**
  * @brief This function handles Debug monitor.
  */
void DebugMon_Handler(void)
{
}

/* SVC_Handler / PendSV_Handler / SysTick_Handler 已由 FreeRTOS port.c 提供
 * （FreeRTOSConfig.h 里 vPortSVCHandler/xPortPendSVHandler/xPortSysTickHandler
 *  宏映射到 CMSIS 标准名），此处不再定义，避免重复。
 * HAL 时基改用 TIM2（SysTick 归 FreeRTOS 当 RTOS tick）。 */

/**
  * @brief This function handles TIM2 global interrupt (HAL timebase).
  */
extern TIM_HandleTypeDef htim2;
void TIM2_IRQHandler(void)
{
  /* USER CODE BEGIN TIM2_IRQn 0 */

  /* USER CODE END TIM2_IRQn 0 */
  HAL_TIM_IRQHandler(&htim2);
  /* USER CODE BEGIN TIM2_IRQn 1 */

  /* USER CODE END TIM2_IRQn 1 */
}

/******************************************************************************/
/* STM32F1xx Peripheral Interrupt Handlers                                    */
/* Add here the Interrupt Handlers for the used peripherals.                  */
/* For the available peripheral interrupt handler names,                      */
/* please refer to the startup file (startup_stm32f1xx.s).                    */
/******************************************************************************/

/**
  * @brief This function handles USART1 global interrupt.
  */
void USART1_IRQHandler(void)
{
  /* USER CODE BEGIN USART1_IRQn 0 */

  /* USER CODE END USART1_IRQn 0 */
  HAL_UART_IRQHandler(&huart1);
  /* USER CODE BEGIN USART1_IRQn 1 */

  /* USER CODE END USART1_IRQn 1 */
}

/**
  * @brief This function handles DMA1 channel3 global interrupt.
  */
void DMA1_Channel6_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart2_rx);
}

void DMA1_Channel3_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Channel3_IRQn 0 */

  /* USER CODE END DMA1_Channel3_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_usart3_rx);
  /* USER CODE BEGIN DMA1_Channel3_IRQn 1 */

  /* USER CODE END DMA1_Channel3_IRQn 1 */
}

/**
  * @brief This function handles DMA2 channel3 global interrupt (UART4_RX / WiFi).
  */
void DMA2_Channel3_IRQHandler(void)
{
  /* USER CODE BEGIN DMA2_Channel3_IRQn 0 */

  /* USER CODE END DMA2_Channel3_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_uart4_rx);
  /* USER CODE BEGIN DMA2_Channel3_IRQn 1 */

  /* USER CODE END DMA2_Channel3_IRQn 1 */
}

/**
  * @brief This function handles UART4 global interrupt (WiFi ESP-01S, DMA+IDLE).
  */
void UART4_IRQHandler(void)
{
  /* USER CODE BEGIN UART4_IRQn 0 */
	uint32_t temp;
	if ((__HAL_UART_GET_FLAG(&huart4, UART_FLAG_IDLE) != RESET))
	{
		/* 清除状态寄存器和数据寄存器 */
		__HAL_UART_CLEAR_IDLEFLAG(&huart4);

		/* 失效DMA接收 */
		HAL_UART_DMAStop(&huart4);

		/* 获取接收长度：总大小-剩余大小 */
		temp = huart4.hdmarx->Instance->CNDTR;
		Rx_Len = Rx_Max - temp;

		/* 追加到 U2_CopyBuff 供 AT 指令/MQTT 报文解析；
		 * 与 USART3 复用同一缓冲区，仅 WiFi 后端激活时才追加，防止两路数据交织 */
		if (Rx_Len > 0 && NET_GetActiveBackend() == NET_BACKEND_WIFI &&
		    (U2_CopyIndex + Rx_Len) < (U2_COPY_SIZE - 1))
		{
			memcpy(U2_CopyBuff + U2_CopyIndex, Rx_Buf, Rx_Len);
			U2_CopyIndex += Rx_Len;
			U2_CopyBuff[U2_CopyIndex] = '\0';
			U2_CopyFlag = 1;
		}

		/* 使能接收DMA传输 */
		HAL_UART_Receive_DMA(&huart4, Rx_Buf, Rx_Max);
	}
  /* USER CODE END UART4_IRQn 0 */
  HAL_UART_IRQHandler(&huart4);
  /* USER CODE BEGIN UART4_IRQn 1 */

  /* USER CODE END UART4_IRQn 1 */
}

/**
  * @brief This function handles USART2 global interrupt.
  */
void USART2_IRQHandler(void)
{
  /* USER CODE BEGIN USART2_IRQn 0 */
  /* 485 秤帧定界：线路静默产生 IDLE，DMA 缓冲区里即一帧完整数据 */
  if (__HAL_UART_GET_FLAG(&huart2, UART_FLAG_IDLE) != RESET)
  {
    __HAL_UART_CLEAR_IDLEFLAG(&huart2);
    HAL_UART_DMAStop(&huart2);
    uint16_t len = (uint16_t)(sizeof(uart2_dma_buf) - huart2.hdmarx->Instance->CNDTR);
    if (len > 0 && !uart2_frame_ready) {
      memcpy(uart2_frame_buf, uart2_dma_buf, len);
      uart2_frame_len = len;
      uart2_frame_ready = 1;
    }
    HAL_UART_Receive_DMA(&huart2, uart2_dma_buf, sizeof(uart2_dma_buf));
    __HAL_UART_ENABLE_IT(&huart2, UART_IT_IDLE);
  }
  /* USER CODE END USART2_IRQn 0 */
  HAL_UART_IRQHandler(&huart2);
  /* USER CODE BEGIN USART2_IRQn 1 */

  /* USER CODE END USART2_IRQn 1 */
}

/**
  * @brief This function handles USART3 global interrupt.
  */
void USART3_IRQHandler(void)
{
  /* USER CODE BEGIN USART3_IRQn 0 */
	uint32_t temp;
	if ((__HAL_UART_GET_FLAG(&huart3, UART_FLAG_IDLE) != RESET))
	{
		/* 清除状态寄存器和数据寄存器 */
		__HAL_UART_CLEAR_IDLEFLAG(&huart3);

		/* 失效DMA接收 */
		HAL_UART_DMAStop(&huart3);

		/* 获取接收长度：总大小-剩余大小 */
		temp = huart3.hdmarx->Instance->CNDTR;
		Rx_Len = Rx_Max - temp;

		/* 追加到 U2_CopyBuff 供 AT 指令/MQTT 消息解析；
		 * 与 UART4 复用同一缓冲区，仅 4G 后端激活时才追加，防止两路数据交织 */
		if (Rx_Len > 0 && NET_GetActiveBackend() == NET_BACKEND_4G &&
		    (U2_CopyIndex + Rx_Len) < (U2_COPY_SIZE - 1))
		{
			memcpy(U2_CopyBuff + U2_CopyIndex, Rx_Buf, Rx_Len);
			U2_CopyIndex += Rx_Len;
			U2_CopyBuff[U2_CopyIndex] = '\0';
			U2_CopyFlag = 1;
		}

		/* 使能接收DMA传输 */
		HAL_UART_Receive_DMA(&huart3, Rx_Buf, Rx_Max);
	}
  /* USER CODE END USART3_IRQn 0 */
  HAL_UART_IRQHandler(&huart3);
  /* USER CODE BEGIN USART3_IRQn 1 */

  /* USER CODE END USART3_IRQn 1 */
}


/* USER CODE BEGIN 1 */

/* USER CODE END 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/