/********************************** (C) COPYRIGHT *******************************
 * File Name          : ch32v20x_it.c
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2022/06/16
 * Description        : Main Interrupt Service Routines.
 *********************************************************************************
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * Attention: This software (modified or not) and binary are used for 
 * microcontroller manufactured by Nanjing Qinheng Microelectronics.
 *******************************************************************************/

/*********************************************************************
 * INCLUDES
 */
#include "ch32v20x_it.h"
#include "eth_driver.h"
#include "CONFIG.h"
#include "debug.h"
#include "fault_diag.h"

/*********************************************************************
 * LOCAL FUNCTIONS
 */
void NMI_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void HardFault_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void BB_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void ETH_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void TIM2_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));


/*********************************************************************
 * @fn      NMI_Handler
 *
 * @brief   This function handles NMI exception.
 *
 * @return  None
 */
void NMI_Handler(void)
{
}

/* 故障诊断现场: .noinit 段 (复位不清零) */
FaultDiag g_fault_diag __attribute__((section(".noinit")));

/*********************************************************************
 * @fn      fault_diag_init
 *
 * @brief   main 开头调用: 打印上次复位现场 + 重置 + 递增 boot_cnt
 *
 * @return  none
 */
void fault_diag_init(void)
{
    if (g_fault_diag.magic == 0xFA57FA57UL) {
        PRINT("FAULT_DIAG: boot_cnt=%lu mcause=0x%08lx mepc=0x%08lx mtval=0x%08lx marker=0x%08lx\n",
              (unsigned long)g_fault_diag.boot_cnt,
              (unsigned long)g_fault_diag.mcause,
              (unsigned long)g_fault_diag.mepc,
              (unsigned long)g_fault_diag.mtval,
              (unsigned long)g_fault_diag.marker);
    } else if (g_fault_diag.marker != 0) {
        /* 非 HardFault 复位 (IWDG 超时/卡死/掉电): marker 仍记录执行轨迹 */
        PRINT("FAULT_DIAG: no-hardfault boot_cnt=%lu marker=0x%08lx (卡死/看门狗复位)\n",
              (unsigned long)g_fault_diag.boot_cnt,
              (unsigned long)g_fault_diag.marker);
    }
    /* 重置现场, boot_cnt 保留递增 */
    g_fault_diag.magic   = 0;
    g_fault_diag.mcause  = 0;
    g_fault_diag.mepc    = 0;
    g_fault_diag.mtval   = 0;
    g_fault_diag.marker  = 0;
    g_fault_diag.boot_cnt++;
}

/*********************************************************************
 * @fn      HardFault_Handler
 *
 * @brief   This function handles Hard Fault exception.
 *
 * @return  None
 */
void HardFault_Handler(void)
{
    /* 纯 RAM 写现场 (不依赖 UART/printf): 栈坏/中断禁用也能留痕 */
    g_fault_diag.magic = 0xFA57FA57UL;
    g_fault_diag.mcause = __get_MCAUSE();
    g_fault_diag.mepc   = __get_MEPC();
    g_fault_diag.mtval  = __get_MTVAL();
    /* 尽力打印 (UART 可用时), 失败不影响 RAM 现场 */
    PRINT("HARDFAULT: mcause=0x%08lx mepc=0x%08lx mtval=0x%08lx\n",
          (unsigned long)g_fault_diag.mcause,
          (unsigned long)g_fault_diag.mepc,
          (unsigned long)g_fault_diag.mtval);
    NVIC_SystemReset();
    while(1)
    {
    }
}

/*********************************************************************
 * @fn      BB_IRQHandler
 *
 * @brief   BB Interrupt for BLE.
 *
 * @return  None
 */
void BB_IRQHandler(void)
{
    BB_IRQLibHandler();
}


/*********************************************************************
 * @fn      ETH_IRQHandler
 *
 * @brief   This function handles ETH exception.
 *
 * @return  none
 */
void ETH_IRQHandler(void)
{
    WCHNET_ETHIsr();
}

void TIM2_IRQHandler( void ) 					                             	
{
    WCHNET_TimeIsr(WCHNETTIMERPERIOD);                                     
	TIM_ClearITPendingBit(TIM2, TIM_IT_Update);			
}