Uint32 main(void) {
//GPIO and SCI are still setup from Sci_Boot()
//Setup sysctl and pll
DisableDog();
IntOsc1Sel();
InitPll(DSP28_PLLCR,DSP28_DIVSEL);
InitFlash();
DELAY_US(100);
// ApplicationPtr = (void(*)(void))SCI_Boot();
//
// if(ApplicationPtr)
// ApplicationPtr();
return SCI_Boot();
// asm(" .ref _ExitBoot");
// asm(" BF _ExitBoot,UNC");
// return 0;
}
//
// SCI_GetFunction - This function first initializes SCIA and performs
// an autobaud lock. It contains a while loop waiting on
// commands from the host. It processes each
// command and sends a response except for Run and
// Reset commands. On Run the kernel exits and branches
// to the Entry Point. On Reset, the kernel exits the
// while loop and does a WatchDog Time-out.
//
Uint32 SCI_GetFunction(Uint32 BootMode)
{
Uint32 EntryAddr;
Uint16 command;
Uint16 data[10]; // 16*10 = 128 + 32
Uint16 length;
//
// read CCNF0 register to check if SCI is enabled or not
//
if((DevCfgRegs.DC8.bit.SCI_A != 0x01))
{
return 0xFFFFFFFF;
}
//
// Assign GetWordData to the SCI-A version of the
// function. GetWordData is a pointer to a function.
//
GetWordData = SCIA_GetWordData;
//
// Initialize the SCI-A port for communications
// with the host.
//
SCIA_Init(BootMode);
SCIA_AutobaudLock();
command = SCI_GetPacket(&length, data);
while(command != RESET_CPU1)
{
//
//Reset the statusCode.
//
statusCode.status = NO_ERROR;
statusCode.address = 0x12345678;
checksum = 0;
//
// CPU1_UNLOCK_Z1
//
if(command == CPU1_UNLOCK_Z1)
{
Uint32 password0 = (Uint32)data[0] | ((Uint32)data[1] << 16);
Uint32 password1 = (Uint32)data[2] | ((Uint32)data[3] << 16);
Uint32 password2 = (Uint32)data[4] | ((Uint32)data[5] << 16);
Uint32 password3 = (Uint32)data[6] | ((Uint32)data[7] << 16);
//
// Unlock the device
//
DcsmZ1Regs.Z1_CSMKEY0 = password0;
DcsmZ1Regs.Z1_CSMKEY1 = password1;
DcsmZ1Regs.Z1_CSMKEY2 = password2;
DcsmZ1Regs.Z1_CSMKEY3 = password3;
if(DcsmZ1Regs.Z1_CR.bit.UNSECURE == 0) //0 = Locked
{
statusCode.status = UNLOCK_ERROR;
}
}
//
// CPU1_UNLOCK_Z2
//
else if(command == CPU1_UNLOCK_Z2)
{
Uint32 password0 = (Uint32)data[0] | ((Uint32)data[1] << 16);
Uint32 password1 = (Uint32)data[2] | ((Uint32)data[3] << 16);
Uint32 password2 = (Uint32)data[4] | ((Uint32)data[5] << 16);
Uint32 password3 = (Uint32)data[6] | ((Uint32)data[7] << 16);
//
//Unlock the device
//
DcsmZ2Regs.Z2_CSMKEY0 = password0;
DcsmZ2Regs.Z2_CSMKEY1 = password1;
DcsmZ2Regs.Z2_CSMKEY2 = password2;
DcsmZ2Regs.Z2_CSMKEY3 = password3;
if(DcsmZ2Regs.Z2_CR.bit.UNSECURE == 0) //0 = Locked
{
statusCode.status = UNLOCK_ERROR;
}
}
//
// DFU_CPU1
//
else if(command == DFU_CPU1)
{
EntryAddr = SCI_Boot(BootMode); //loads application into CPU1 FLASH
if(statusCode.status == NO_ERROR)
{
statusCode.address = EntryAddr;
}
}
//
// ERASE_CPU1
//
else if(command == ERASE_CPU1)
{
Uint32 sectors = (Uint32)(((Uint32)data[1] << 16) |
(Uint32)data[0]);
Shared_Erase(sectors);
}
//
// VERIFY_CPU1
//
else if(command == VERIFY_CPU1)
{
VerifyData();
}
//
// RUN_CPU1
//
else if(command == RUN_CPU1)
{
EntryAddr = (Uint32)(((Uint32)data[1] << 16) | (Uint32)data[0]);
return(EntryAddr);
}
//
// COMMAND_ERROR
//
else
{
statusCode.status = COMMAND_ERROR;
}
//
// Send the packet and if NAK send again.
//
while(SCI_SendPacket(command, statusCode.status, 6,
(Uint16*)&statusCode.address)){}
//
// Get next Packet
//
command = SCI_GetPacket(&length, data); //get next packet
}
//
// Reset with WatchDog Timeout
//
EALLOW;
WdRegs.SCSR.all = 0; //enable WDRST
WdRegs.WDCR.all = 0x28; //enable WD
EDIS;
while(1){}
}
