/* includes ----------------------------------------------------------*/
#include "flash.h"

/* typedef -----------------------------------------------------------*/
typedef struct{
	uint8_t  updateFlag; // 更新标志
	uint8_t  a; 		 // 预留
	uint16_t b; 		 // 预留
	uint32_t jumpAddr;   // 跳转地址
}param_boot;
param_boot s_param_boot = {
	.jumpAddr = 0x8040C00U,
	};

/* define ------------------------------------------------------------*/

/* macro -------------------------------------------------------------*/

/* variables ---------------------------------------------------------*/

/* function prototypes -----------------------------------------------*/

/**
 * @brief	flash读数据
 * @param	address：读数据的起始地址 
 			read_buf：数据存储区
 			length：读取的数据长度
 * @return 	HAL_StatusTypeDef      
 */
void FLASH_Read(uint32_t address, uint32_t *read_buf, uint32_t length)
{
    for (uint32_t i = 0; i < length; i++)
    {
        read_buf[i] = *(volatile uint32_t*)(address + (i * 4)); // 以字(32位)为单位读取
    }
}

/**
 * @brief	flash按页擦除
 * @param	app_address    address to jump 
 			number_of_pages：擦除页的页数
 * @return 	HAL_StatusTypeDef      
 */
HAL_StatusTypeDef FLASH_Erase(uint32_t start_address, uint32_t number_of_pages)
{
    HAL_StatusTypeDef status = HAL_ERROR;
    FLASH_EraseInitTypeDef EraseInitStruct;
    uint32_t PageError = 0;

    // 解锁Flash
    HAL_FLASH_Unlock();

    // 设置擦除参数
    EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
    EraseInitStruct.PageAddress = start_address;
    EraseInitStruct.NbPages = number_of_pages;

    // 擦除Flash
    status = HAL_FLASHEx_Erase(&EraseInitStruct, &PageError);

    // 锁定Flash
    HAL_FLASH_Lock();

    return status; // 返回擦除操作的状态
}

/**
 * @brief	flash按字写入
 * @param	address：写入地址
 			data：数据
 			length：长度
 * @return 	HAL_StatusTypeDef      
 */

HAL_StatusTypeDef FLASH_Write(uint32_t address, uint32_t *data, uint32_t length)
{
    HAL_StatusTypeDef status = HAL_ERROR;

    // 解锁Flash
    HAL_FLASH_Unlock();

    // 逐个字节写入数据
    for (uint32_t i = 0; i < length; i++)
    {
        if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data[i]) == HAL_OK)
        {
            // 验证写入的数据
            if (*(uint32_t*)address != data[i])
            {
                status = HAL_ERROR;
                break;
            }
            address += 4; // 更新地址（一个字的大小）
        }
        else
        {
            status = HAL_ERROR;
            break;
        }
    }

    // 锁定Flash
    HAL_FLASH_Lock();

    return status; // 返回写入操作的状态
}

/**
 * @brief	写参数区数据
 * @param	none
 * @return 	HAL_StatusTypeDef      
 */
void Write_paramArea(void){
	// 擦除和写入参数
	uint32_t start_address = PARAM_ADDRESS; // Flash起始地址
	uint32_t number_of_pages = 1; // 假设我们只擦除1页

	// 调用擦除函数
	if (FLASH_Erase(start_address, number_of_pages) != HAL_OK) {
		// 擦除失败的处理
	}

	// 准备写入的数据
	uint32_t data_to_write[] = {0x01000000, 0x8040C00U}; // 示例数据数组
	uint32_t length_of_data = sizeof(data_to_write) / sizeof(uint32_t); // 数据数组长度

	// 调用写入函数
	if (FLASH_Write(start_address, data_to_write, length_of_data) != HAL_OK) {
		// 写入失败的处理
	}
}

/**
 * @brief	参数区数据读取
 * @param	NONE
 * @return 	HAL_StatusTypeDef      
 */
void Read_ParamArea(void) {
    // 读取结构体中前两个字的数据
    FLASH_Read(PARAM_ADDRESS, (uint32_t*)&s_param_boot, sizeof(param_boot) / sizeof(uint32_t));
}


/**
 * @brief	向量重映射
 * @param	NONE
 * @return 	HAL_StatusTypeDef      
 */
void Remap_Vector_Table(void) {
  
    __disable_irq();

	Read_ParamArea();

    SCB->VTOR = s_param_boot.jumpAddr;

    __enable_irq();
}