FAL组件擦除分区数据返回值并非实际擦除区域大小

发布于 2024-05-08 19:44:35 浏览：446 订阅该版

包括STM32系列，AT32系列在内，Flash擦除是以扇区或页为单位进行擦除的。

以下这条FAL组件的函数：

```c
int fal_partition_erase(const struct fal_partition *part, uint32_t addr, size_t size)
```

其返回值应为实际擦除的区域大小。但底层驱动bug，导致每次擦除返回值都是入参size

比如stm32的函数：

```c
int stm32_flash_erase(rt_uint32_t addr, size_t size)
{
    rt_err_t result = RT_EOK;
    rt_uint32_t FirstSector = 0, NbOfSectors = 0;
    rt_uint32_t SECTORError = 0;

if ((addr + size) > STM32_FLASH_END_ADDRESS)
    {
        LOG_E("ERROR: erase outrange flash size! addr is (0x%p)\n", (void *)(addr + size));
        return -RT_EINVAL;
    }

/*Variable used for Erase procedure*/
    FLASH_EraseInitTypeDef EraseInitStruct;

/* Unlock the Flash to enable the flash control register access */
    HAL_FLASH_Unlock();

/* Get the 1st sector to erase */
    FirstSector = GetSector(addr);
    /* Get the number of sector to erase from 1st sector*/
    NbOfSectors = GetSector(addr + size - 1) - FirstSector + 1;
    /* Fill EraseInit structure*/
    EraseInitStruct.TypeErase     = FLASH_TYPEERASE_SECTORS;
    EraseInitStruct.VoltageRange  = FLASH_VOLTAGE_RANGE_3;
    EraseInitStruct.Sector        = FirstSector;
    EraseInitStruct.NbSectors     = NbOfSectors;

if (HAL_FLASHEx_Erase(&EraseInitStruct, &SECTORError) != HAL_OK)
    {
        result = -RT_ERROR;
        goto __exit;
    }

__exit:

HAL_FLASH_Lock();

if (result != RT_EOK)
    {
        return result;
    }

LOG_D("erase done: addr (0x%p), size %d", (void *)addr, size);
    return size;
}
```
直接返回了size，而不是实际擦除区域大小。

比如AT32的函数：

```c
int at32_flash_erase(rt_uint32_t addr, rt_uint32_t size)
{
    rt_err_t result = RT_EOK;
    rt_uint32_t end_addr = addr + size;
    rt_uint32_t page_addr = 0;

flash_unlock();

if ((end_addr) > AT32_FLASH_END_ADDRESS)
    {
        LOG_E("erase outrange flash size! addr is (0x%p)", (void *)(addr + size));
        return -RT_EINVAL;
    }

while(addr < end_addr)
    {
        page_addr = get_page(addr);

if(flash_sector_erase(page_addr) != FLASH_OPERATE_DONE)
        {
            result = -RT_ERROR;
            goto __exit;
        }

addr += FLASH_PAGE_SIZE;
    }

flash_lock();

__exit:
    if(result != RT_EOK)
    {
        return result;
    }

return size;
}
```
也是直接返回了size