#include "flash.h"


uint8_t Write_Buff[STM32L_PAGES_SIZE];

//读取FLASHYIGE 字节的数据
uint8_t FLASH_ReadByte(uint32_t Addr)
{
	return *(__IO uint8_t*)Addr;
}

//读取FLASH多个字节的数据
void FLASH_ReadNByte(uint32_t Addr,uint8_t *pBuff,uint32_t Len)
{
	uint32_t i;
	for(i = 0;i < Len;i++)
	{
		pBuff[i] = FLASH_ReadByte(Addr);
		Addr ++;
	}
}

/*************************************
函数名称：
函数功能：向FLASH指地址写
入数据
函数参数：页号，写入缓冲区
函数返回值：
**************************************/
void FLASH_WriteWord(uint32_t add,uint8_t *pBuff,uint32_t length)
{
	unsigned short int i;
  
	if(add < STM32L_FLASH_BASE)
		return;
	FLASH_Unlock();
	FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_WRPERR|FLASH_FLAG_PGAERR\
	|FLASH_FLAG_SIZERR|FLASH_FLAG_OPTVERR|FLASH_FLAG_OPTVERRUSR);
	//FLASH_ErasePage(Addr);
	
	/*******************************************/
	for(i = 0;i < length;i+=4)
	{
		FLASH_FastProgramWord(add+i,*(uint32_t *)pBuff);
    
		//add += 4;
		pBuff += 4;
	}

	/*******************************************/
	FLASH_Lock();
}

/*************************************
函数名称：
函数功能：向FLASH指定页写
入数据
函数参数：页号，写入缓冲区
函数返回值：
**************************************/
void FLASH_WritePage(uint16_t Page_Num,uint8_t *pBuff)
{
	uint32_t Addr;
	unsigned short int i;
	if(Page_Num > STM32L_PAGES_NUM)
		return;
	Addr = Page_Num * STM32L_PAGES_SIZE + APP_ADDR;
	FLASH_Unlock();
	FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_WRPERR|FLASH_FLAG_PGAERR\
	|FLASH_FLAG_SIZERR|FLASH_FLAG_OPTVERR|FLASH_FLAG_OPTVERRUSR);
	FLASH_ErasePage(Addr);
	
	/*******************************************/
	for(i = 0;i < STM32L_PAGES_SIZE;i+=4)
	{
		FLASH_FastProgramWord(Addr,*(unsigned long int *)pBuff);
		Addr += 4;
		pBuff += 4;
	}

	/*******************************************/
	FLASH_Lock();
}

void Flash_Erase_Pages(uint32_t pagestart,uint16_t number)
{
  uint32_t Addr;
	
	if(pagestart > STM32L_PAGES_NUM)
		return;
	//Addr = pagestart * STM32L_PAGES_SIZE + APP_ADDR;
	FLASH_Unlock();
	FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_WRPERR|FLASH_FLAG_PGAERR\
	|FLASH_FLAG_SIZERR|FLASH_FLAG_OPTVERR|FLASH_FLAG_OPTVERRUSR);
  for( uint16_t i=0;i<number;i++)
  {
    //Addr = (pagestart+i) * STM32L_PAGES_SIZE + APP_ADDR;
    Addr = (pagestart+i) * STM32L_PAGES_SIZE + STM32L_FLASH_BASE;
    FLASH_ErasePage(Addr);
  }	
  FLASH_Lock();
}