void DataFlash_APM1::WriteByte(byte data)
{
if (!df_Stop_Write)
{
BufferWrite(df_BufferNum,df_BufferIdx,data);
df_BufferIdx++;
if (df_BufferIdx >= df_PageSize) // End of buffer?
{
df_BufferIdx=4; //(4 bytes for FileNumber, FilePage)
BufferToPage(df_BufferNum,df_PageAdr,0); // Write Buffer to memory, NO WAIT
df_PageAdr++;
if (OVERWRITE_DATA==1)
{
if (df_PageAdr>DF_LAST_PAGE) // If we reach the end of the memory, start from the begining
df_PageAdr = 1;
}
else
{
if (df_PageAdr>DF_LAST_PAGE) // If we reach the end of the memory, stop here
df_Stop_Write=1;
}
if (df_BufferNum==1) // Change buffer to continue writing...
df_BufferNum=2;
else
df_BufferNum=1;
// We are starting a new page - write FileNumber and FilePage
BufferWrite(df_BufferNum,0,df_FileNumber>>8); // High byte
BufferWrite(df_BufferNum,1,df_FileNumber&0xFF); // Low byte
df_FilePage++;
BufferWrite(df_BufferNum,2,df_FilePage>>8); // High byte
BufferWrite(df_BufferNum,3,df_FilePage&0xFF); // Low byte
}
void DataFlash_Block::FinishWrite(void)
{
// Write Buffer to flash, NO WAIT
BufferToPage(df_BufferNum, df_PageAdr, 0);
df_PageAdr++;
// If we reach the end of the memory, start from the begining
if (df_PageAdr > df_NumPages)
df_PageAdr = 1;
// switch buffer
df_BufferNum ^= 1;
df_BufferIdx = 0;
}
void DataFlash_Class::FinishWrite(void)
{
df_BufferIdx=0;
BufferToPage(df_BufferNum,df_PageAdr,0); // Write Buffer to memory, NO WAIT
df_PageAdr++;
if (DF_OVERWRITE_DATA==1) {
if (df_PageAdr>df_NumPages) // If we reach the end of the memory, start from the begining
df_PageAdr = 1;
} else {
if (df_PageAdr>df_NumPages) // If we reach the end of the memory, stop here
df_Stop_Write=1;
}
if (df_BufferNum==1) // Change buffer to continue writing...
df_BufferNum=2;
else
df_BufferNum=1;
}
void DataFlash_Block::FinishWrite(void)
{
WaitReady();
BufferToPage (df_PageAdr << 8); // Save 256 bytes from buffer to Page
df_PageAdr++;
if (df_PageAdr > df_NumPages){
Flash_Jedec_EraseSector(0); // Erase Sector 0
df_PageAdr = 1;
}
// check if new sector is erased
if (df_PageAdr % 256 == 0){
uint16_t data = 0;
BlockRead((df_PageAdr << 8), &data, sizeof(data));
if (data != 0xFFFF){
Flash_Jedec_EraseSector(df_PageAdr << 8); // Erase Sector
}
}
df_BufferIdx = 0;
}
void WriteSector(uint16_t sector, uint8_t* buffer)
{
BufferWriteStr(2, 0, 512, buffer);
BufferToPage(2, sector);
}
void WriteSector(uint16_t sector, uint8_t* buffer)
{
BufferWriteStr(2, 0, 512, buffer); // write 512 bytes to beginning (offset 0) of AT45D internal buffer 2
BufferToPage(2, sector); // transfer AT45D internal buffer 2 into AT45D internal page 'sector'
}