void DataFlash_Block::ReadBlock(void *pBuffer, uint16_t size)
{
while (size > 0) {
uint16_t n = df_PageSize - df_Read_BufferIdx;
if (n > size) {
n = size;
}
WaitReady();
BlockRead(df_Read_BufferNum, df_Read_BufferIdx, pBuffer, n);
size -= n;
pBuffer = (void *)(n + (uintptr_t)pBuffer);
df_Read_BufferIdx += n;
if (df_Read_BufferIdx == df_PageSize) {
df_Read_PageAdr++;
if (df_Read_PageAdr > df_NumPages) {
df_Read_PageAdr = 1;
}
PageToBuffer(df_Read_BufferNum, df_Read_PageAdr);
// We are starting a new page - read FileNumber and FilePage
struct PageHeader ph;
BlockRead(df_Read_BufferNum, 0, &ph, sizeof(ph));
df_FileNumber = ph.FileNumber;
df_FilePage = ph.FilePage;
df_Read_BufferIdx = sizeof(ph);
}
}
}
void DataFlash_Block::StartRead(uint16_t PageAdr)
{
df_Read_BufferNum = 0;
df_Read_PageAdr = PageAdr;
WaitReady();
// copy flash page to buffer
PageToBuffer(df_Read_BufferNum, df_Read_PageAdr);
// We are starting a new page - read FileNumber and FilePage
struct PageHeader ph;
BlockRead(df_Read_BufferNum, 0, &ph, sizeof(ph));
df_FileNumber = ph.FileNumber;
df_FilePage = ph.FilePage;
df_Read_BufferIdx = sizeof(ph);
}
void ReadSector(uint16_t sector, uint8_t* buffer)
{
PageToBuffer(sector, 2);
BufferReadStr(2, 0, 512, buffer);
}
void ReadSector(uint16_t sector, uint8_t* buffer)
{
PageToBuffer(sector, 2); // transfer AT45D internal page 'sector' into AT45D internal buffer 2
BufferReadStr(2, 0, 512, buffer); // read 512 bytes from beginning (offset 0) of AT45D internal buffer 2
}