#include "mass_mal.h"

#define FLASH_START_ADDR 0x08016000 // Flash start address
#define FLASH_SIZE 0x64000 // 400K 的U盘
#define FLASH_PAGE_SIZE 0x800 // 2k Bytes per page,只有2K才能格式化
#define FLASH_WAIT_TIMEOUT 100000

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint32_t Mass_Memory_Size[2];
uint32_t Mass_Block_Size[2];
uint32_t Mass_Block_Count[2];
__IO uint32_t Status = 0;

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : MAL_Init
* Description : 初始化STM32的媒体设备
* Input : lun
* Output : None
* Return : None
*******************************************************************************/
uint16_t MAL_Init(uint8_t lun)
{
u16 status = MAL_OK;

switch (lun)
{
case 0:
FLASH_Unlock();
break;
default:
return MAL_FAIL;
}
return status;
}
/*******************************************************************************
* Function Name : MAL_Write
* Description : 写扇区
* Input : None
* Output : None
* Return : None
*******************************************************************************/
uint16_t MAL_Write(uint8_t lun, uint32_t Memory_Offset, uint32_t *Writebuff, uint16_t Transfer_Length)
{
uint16_t i;
switch (lun)
{
case 0:
for(i=0;i {
if(FLASH_WaitForLastOperation(FLASH_WAIT_TIMEOUT)!=FLASH_TIMEOUT)
{
FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_PGERR|FLASH_FLAG_WRPRTERR);
}
FLASH_ErasePage(FLASH_START_ADDR + Memory_Offset + i);
}
for(i=0;i {
if(FLASH_WaitForLastOperation(FLASH_WAIT_TIMEOUT)!=FLASH_TIMEOUT)
{
FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_PGERR|

FLASH_FLAG_WRPRTERR);
}
FLASH_ProgramWord(FLASH_START_ADDR + Memory_Offset + i , Writebuff[i>>2]);
}
break;
default:
return MAL_FAIL;
}
return MAL_OK;
}

/*******************************************************************************
* Function Name : MAL_Read
* Description : 读取扇区
* Input : None
* Output : None
* Return : Buffer pointer
*******************************************************************************/
uint16_t MAL_Read(uint8_t lun, uint32_t Memory_Offset, uint32_t *Readbuff, uint16_t Transfer_Length)
{
uint16_t i;
switch (lun)
{
case 0:
for(i=0;i {
Readbuff[i>>2] = ((vu32*)(FLASH_START_ADDR + Memory_Offset))[i>>2];
}
break;
default:
return MAL_FAIL;
}
return MAL_OK;
}

/*******************************************************************************
* Function Name : MAL_GetStatus
* Description : 获取状态
* Input : None
* Output : None
* Return : None
*******************************************************************************/
uint16_t MAL_GetStatus (uint8_t lun)
{
if (lun == 0)
{
Mass_Block_Count[0] = FLASH_SIZE/FLASH_PAGE_SIZE;
Mass_Block_Size[0] = FLASH_PAGE_SIZE;
Mass_Memory_Size[0] = FLASH_SIZE;
LED2_ON();
return MAL_OK;
}
LED2_OFF();

 
return MAL_FAIL;
}