GC24001/Hardware/hw_flash_data.c

#include "board.h"

/**
 * 读取flash一个字
 * 
 * @author Lim (2023/3/15)
 * 
 * @param pos 
 * 
 * @return uint32_t 
 */
uint32_t hw_flash_read_word(uint32_t pos)
{
    return *(vu32*)pos;
}


/**
 * 读取硬件参数保存部分,要求数据指针地址是4字节对齐
 * 
 * @author lxz (2019/5/30/周四)
 * 
 * @param data 
 * 
 * @return int 
 */
int hw_flash_read(uint32_t pos, void *data, uint32_t length) {
    uint32_t *dat = data;
    int size = 0;
    for (size = 0; size < length; size++) {
        *dat = hw_flash_read_word(pos + size);
        dat++;
    }
    return size;
}

/**
 * 写入硬件参数部分,要求数据指针地址是4字节对齐
 * 
 * @author lxz (2019/5/30/周四)
 * 
 * @param data 
 * 
 * @return int 
 */
int hw_flash_write(uint32_t pos, void *data, uint32_t length) {
    int size = 0;
    uint32_t *ptr = data;
    //开始编写参数
    INTX_DISABLE();
    fmc_unlock();
    for (size = 0; size < length; size++) {
        if (fmc_word_program(pos,*ptr) != FMC_READY)
        {
            break;
        }
        ptr++;
        pos += 4;
    }
    fmc_lock();
    INTX_ENABLE();
    return length;
}


/**
 * 擦除地址所在的扇区
 * 
 * @author lxz 
 * 
 * @param pos 
 */
void hw_flash_erase(uint32_t pos) {
    INTX_DISABLE();
    fmc_unlock();
    fmc_page_erase(pos & 0xFFFFF400U);
    fmc_lock(); 
    INTX_ENABLE();
}


/**
 * 检查指定的空间是否能写入
 * 
 * @author lxz (2019/5/31/周五)
 * 
 * @param pos 必须保证32字节对齐的地址
 * @param length 
 * 
 * @return int 
 */
int hw_flash_data_is_valid(uint32_t pos, uint32_t length) {

    length = (length + 3) / 4;

    while (length > 0) {
        if (hw_flash_read_word(pos) != 0xFFFFFFFF) {
            break;
        }
        length--;
        pos += 4;
    }
    return length;
}