#include "system.h"
#include "uart.h"
#include "relay.h"

DMA_HandleTypeDef hdma_usart3_rx;
DMA_HandleTypeDef hdma_uart4_rx;

static IWDG_HandleTypeDef hiwdg;   /* 独立看门狗句柄，本模块内私有 */

/* LSI(~40kHz) / 256分频 / 重载4095 → 超时约26s（LSI 漂移下最短约17s） */
static void MX_IWDG_Init(void)
{
    hiwdg.Instance = IWDG;
    hiwdg.Init.Prescaler = IWDG_PRESCALER_256;
    hiwdg.Init.Reload = 4095;
    if (HAL_IWDG_Init(&hiwdg) != HAL_OK) Error_Handler();
}

/* 喂狗：主循环和 app_bg_service（长阻塞等待间隙）都必须调用 */
void IWDG_Feed(void)
{
    HAL_IWDG_Refresh(&hiwdg);
}

/**
 * @brief 基础硬件初始化一条龙：HAL/时钟/GPIO/DMA/UART/看门狗
 * @note  BootLoader 跳转前已启动 IWDG，这里尽早接管喂狗；
 *        之后 NET_init 等长阻塞流程通过 bg_delay → app_bg_service 喂狗
 */
void Board_Init(void)
{
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_DMA_Init();
    MX_USART1_UART_Init();
    MX_USART2_UART_Init();   /* RS485 喂料秤 */
    MX_USART3_UART_Init();   /* 4G Air780E */
    MX_UART4_UART_Init();    /* WiFi ESP-01S */
    MX_IWDG_Init();
}

void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) Error_Handler();

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) Error_Handler();
}

void MX_DMA_Init(void)
{
    __HAL_RCC_DMA1_CLK_ENABLE();
    __HAL_RCC_DMA2_CLK_ENABLE();
    HAL_NVIC_SetPriority(DMA1_Channel3_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(DMA1_Channel3_IRQn);
    HAL_NVIC_SetPriority(DMA2_Channel3_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(DMA2_Channel3_IRQn);
}

void MX_GPIO_Init(void)
{
    GPIO_InitTypeDef g = {0};

    __HAL_RCC_GPIOD_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    __HAL_RCC_GPIOC_CLK_ENABLE();

    /* 继电器为高电平吸合，上电瞬间必须立即置低，防止浮空导致误吸合 */
    HAL_GPIO_WritePin(Relay1_Port, Relay1_Pin, GPIO_PIN_RESET);
    HAL_GPIO_WritePin(Relay2_Port, Relay2_Pin, GPIO_PIN_RESET);
    HAL_GPIO_WritePin(Relay3_Port, Relay3_Pin, GPIO_PIN_RESET);
    HAL_GPIO_WritePin(Relay4_Port, Relay4_Pin, GPIO_PIN_RESET);

    g.Mode  = GPIO_MODE_OUTPUT_PP;
    g.Pull  = GPIO_NOPULL;
    g.Speed = GPIO_SPEED_FREQ_LOW;

    g.Pin = Relay1_Pin; HAL_GPIO_Init(Relay1_Port, &g);
    g.Pin = Relay2_Pin; HAL_GPIO_Init(Relay2_Port, &g);
    g.Pin = Relay3_Pin; HAL_GPIO_Init(Relay3_Port, &g);
    g.Pin = Relay4_Pin; HAL_GPIO_Init(Relay4_Port, &g);
}

void Error_Handler(void)
{
    /* 初始化失败：停在这里，若 IWDG 已启动则由看门狗复位 */
    __disable_irq();
    while (1)
    {
    }
}