How does one obtain the DOS memory locations for BAR0 and BAR1 for a NI-DAQ MIO PCI card? I have the two BAR addresses on the card.
A sample of NI's Linux code for iBus generation appears below. I would like to find out how to get &mem0, &mem1, &fd for DOS. If I have those numbers I might be able to generate an iBus and a chip object to develop a driver for the DAQ card. I would appreciate any brief explanations as to how to access DOS memory allocation information.
Wes
struct LinuxSpecific{
u32 _fileDescriptor;
};
i32 FindPCICard(u32,u32*,u32*,u32*,u32*);
i32 MapPCIMemory(u32,u32,u32,u32,void**,void**,i32*);
/* Return iBus of first matching PCI/PXI card.
*/
iBus* acquireBoard(const u32 devicePCI_ID)
{
u32 temp_PCIID,devBAR0,devBAR0Len,devBAR1,devBAR1Len;
i32 retval,fd;
void *mem0,*mem1;
iBus *bus;
LinuxSpecific *privateIBus;
//Find the PCI memory ranges from /proc/bus/pci/devices
retval=FindPCICard(devicePCI_ID,&devBAR0,&devBAR1,&devBAR0Len,&devBAR1Len);
if(retval<0) return NULL;
printf("PCI Device ID 0x%lx, BAR0 %lx-%lx, BAR1 %lx-%lx \n",devicePCI_ID,devBAR0,devBAR0Len,devBAR1,devBAR1Len);
//Memory map /dev/mem to get access to the PCI Card's memory
retval=MapPCIMemory(devBAR0,devBAR1,devBAR0Len,devBAR1Len,&mem0,&mem1, &fd);
if(retval<0) return NULL;
printf("PCI Device ID 0x%lx, mem0 0x%lx, mem1 0x%lx\n",devicePCI_ID,mem0,mem1);
//create a new iBus which uses the mmaped addresses of /dev/mem
bus = new iBus(0, 0, mem0, mem1);
bus->_physBar[0] = (u32)devBAR0;
bus->_physBar[1] = (u32)devBAR1;
bus->_physBar[2] = (u32)NULL;
bus->_physBar[3] = (u32)NULL;
bus->_physBar[4] = (u32)NULL;
bus->_physBar[5] = (u32)NULL;
privateIBus = new LinuxSpecific;
privateIBus->_fileDescriptor = fd;
bus->osSpecific = (void*)privateIBus;
return bus;
}
