/**
* @brief Writes block of data to the FLASH. In this function, the
* number of WRITE cycles are reduced, using Page WRITE sequence.
* @param pBuffer : pointer to the buffer containing the data to be
* written to the FLASH.
* @param WriteAddr : FLASH's internal address to write to.
* @param NumByteToWrite : number of bytes to write to the FLASH.
* @retval : None
*/
void SPI_FLASH_BufferWrite(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite)
{
uint8_t NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0, temp = 0;
Addr = WriteAddr % SPI_FLASH_PageSize;
count = SPI_FLASH_PageSize - Addr;
NumOfPage = NumByteToWrite / SPI_FLASH_PageSize;
NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize;
if (Addr == 0) /* WriteAddr is SPI_FLASH_PageSize aligned */
{
if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */
{
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);
}
else /* NumByteToWrite > SPI_FLASH_PageSize */
{
while (NumOfPage--)
{
SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);
WriteAddr += SPI_FLASH_PageSize;
pBuffer += SPI_FLASH_PageSize;
}
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
else /* WriteAddr is not SPI_FLASH_PageSize aligned */
{
if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */
{
if (NumOfSingle > count) /* (NumByteToWrite + WriteAddr) > SPI_FLASH_PageSize */
{
temp = NumOfSingle - count;
SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);
WriteAddr += count;
pBuffer += count;
SPI_FLASH_PageWrite(pBuffer, WriteAddr, temp);
}
else
{
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);
}
}
else /* NumByteToWrite > SPI_FLASH_PageSize */
{
NumByteToWrite -= count;
NumOfPage = NumByteToWrite / SPI_FLASH_PageSize;
NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize;
SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);
WriteAddr += count;
pBuffer += count;
while (NumOfPage--)
{
SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);
WriteAddr += SPI_FLASH_PageSize;
pBuffer += SPI_FLASH_PageSize;
}
if (NumOfSingle != 0)
{
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
}
}
/******************************************************************************************
*函数名：SPI_FLASH_BufferWrite()
* 参数：uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite 数据指针，写入地址，写入的个数
* 返回值：void
* 功能：SPIFLASH多个数据函数，外部调用
*********************************************************************************************/
void SPI_FLASH_BufferWrite(uint8_t *pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite)
{
uint8_t NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0, temp = 0;
Addr = WriteAddr % SPI_FLASH_PageSize; //计算写入的页的对应初始地址
count = SPI_FLASH_PageSize - Addr;
NumOfPage = NumByteToWrite / SPI_FLASH_PageSize; //计算总共要写的页数
NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize; //计算剩余单个页写的数据个数
if (Addr == 0) /* 如果要写入的页地址为0，说明正好整页写数据，没有偏移*/
{
if (NumOfPage == 0) /* 如果计算的写入页数为0，说明数据量在一个页的范围内，可直接进行页的写*/
{
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite); //进行页写数据
}
else /* 如果要写的页数大于0*/
{
/*先将开头数据进行整页写入*/
while (NumOfPage--)
{
//整页写入
SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);
//地址偏移
WriteAddr += SPI_FLASH_PageSize;
//数据指针偏移
pBuffer += SPI_FLASH_PageSize;
}
//将剩余数据个数写入
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
else /*如果写入的地址不在页的开头位置*/
{
if (NumOfPage == 0) /*如果写入数据页的个数为0，即数据小于一页容量*/
{
if (NumOfSingle > count) /*如果剩余数据大于当前页的剩余容量*/
{
temp = NumOfSingle - count; //计算超出的数据个数
/*写满当前页*/
SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);
/*设置地址偏移*/
WriteAddr += count;
/*设置数据指针偏移*/
pBuffer += count;
/*将剩余量写入新的页*/
SPI_FLASH_PageWrite(pBuffer, WriteAddr, temp);
}
else /*如果剩余数据小于当前页的剩余容量*/
{
/*直接写入当前页*/
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);
}
}
else /*如果写入数据页的个数大于0，即数据大于一页容量*/
{
NumByteToWrite -= count; //总数据减去当前页剩余的容量
NumOfPage = NumByteToWrite / SPI_FLASH_PageSize; //计算要写的整页个数
NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize; //计算剩余数据个数
/*将开头数据写入当前页剩余字节个数*/
SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);
/*设置地址偏移*/
WriteAddr += count;
/*设置数据指针偏移*/
pBuffer += count;
/*开始剩下数据的整页写入*/
while (NumOfPage--)
{
/*写入一个页的字节数*/
SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);
/*设置地址偏移*/
WriteAddr += SPI_FLASH_PageSize;
/*设置指针偏移*/
pBuffer += SPI_FLASH_PageSize;
}
/*如果剩余数据大于0，将剩余的个数写入下一个页*/
if (NumOfSingle != 0)
{
SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);
}
}
}
}
