Sundance SMT410 v.1.0 - Manual (Page 30)

Page 30 of 49 SMT410 User Manual V1.0
Figure 5 : DSP Transfer via the Local Aperture 0
Receive Target address via Com-Port
Link
i.e. 0xFE12 3000
Unlock the system register in PCI Bridge
#define LB_CFG_SYSTEM (0x78>>2) (divide by 4 to word align offset address of PCI
bridge register)
WritePCIRegisters((unsigned int)LB_CFG_SYSTEM,0xA05F); // Unlock Code
WritePCIRegisters((unsigned int)LB_CFG_SYSTEM,0x22008800); // Restore Value
Write Lower 24 bits of byte TargetAddress to the LB_MAP0_RES register
#define LB_MAP0_RES (0x5C>>2)
#define LB_MAP0_MEMORY_RW 0x00060000
#define LB_MAP0_ADDRESS_MASK 0xFF000000
WritePCIRegisters((unsigned int)LB_MAP0_RES,(unsigned int)(TargetAddress &
LB_MAP0_ADDRESS_MASK ) | LB_MAP0_MEMORY_RW);
// The LB_MAP0_MEMORY_RW must be Or’ed with the data to ensure the other register in
// the 32-bit word has its correct value.
Write WORD Aligned data to Local Aperture space 0.
WritePCIApperture0((ByteToWord32(((TargetAddress) & ~LB_MAP0_ADDRESS_MASK))),Length,buffer);
Where
void WritePCIApperture0(unsigned int address,unsigned long Length,unsigned int *buffer)
{
unsigned int Index;
globalbuswriteClockMB(0x18000000 + address , Length , buffer);
}