//
// SCI_GetPacket - This routine receives the packet, returns the
// command and puts the data length in Uin16* length
// and data in Uint16* data
//
Uint16 SCI_GetPacket(Uint16* length, Uint16* data)
{
if(SCIA_GetOnlyWordData() != 0x1BE4)
{
SendNAK();
return(100); //start packet error
}
*length = SCIA_GetOnlyWordData();
checksum = 0; //checksum of command and data
Uint16 command = SCIA_GetOnlyWordData();
int i = 0;
for(i = 0; i < (*length)/2; i++)
{
*(data+i) = SCIA_GetOnlyWordData();
}
Uint16 dataChecksum = checksum;
if(dataChecksum != SCIA_GetOnlyWordData())
{
SendNAK();
return(101); //checksum error
}
if(SCIA_GetOnlyWordData() != 0xE41B)
{
SendNAK();
return(102); //end packet error
}
SendACK();
return(command);
}
Uint32 SCI_Boot()
{
Uint32 EntryAddr;
// Asign GetWordData to the SCI-A version of the
// function. GetOnlyWordData is a pointer to a function.
// This version doesn't send echo back each character.
GetOnlyWordData = SCIA_GetOnlyWordData;
SCIA_Init();
SCIA_AutobaudLock();
checksum = 0;
// If the KeyValue was invalid, abort the load
// and return the flash entry point.
if (SCIA_GetOnlyWordData() != 0x08AA) return FLASH_ENTRY_POINT;
ReadReservedFn();
EntryAddr = GetLongData();
CopyData();
return EntryAddr;
}
