Accessing DSP chip thru. PCI bridge

NTDEV
1

Hi All,

I am writing a WDM driver for TI PCI2050 bridge and TI
TMS320C6415 DSP chip. The thing is I need to
communicate to the DSP chip once I got hold of the PCI
bridge. Can somebody explain me how to access the DSP
chip (basically writing and reading to the
registers)thru. the PCI bridge.

Any help would be appreciated.

Thanks in advance.

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2

>I am writing a WDM driver for TI PCI2050 bridge and TI

TMS320C6415 DSP chip. The thing is I need to
communicate to the DSP chip once I got hold of the PCI
bridge. Can somebody explain me how to access the DSP
chip (basically writing and reading to the
registers)thru. the PCI bridge.

You didn’t mention which OS? On PnP OS’s, you should get an AddDevice call
in your driver when the PnP system finds your device on the bus (you must
make an INF file with the DSP’s PCI id’s). Assuming your hardware is
appropriately designed, you would just need to write a WDM function driver.

What do you mean by “once I got hold of the PCI bridge”? If you mean your
bridge chip is NOT recognized as a PCI bridge, you will probably need to
write a bus driver to enumerate the back side of the bridge (i.e. the bus
the DSP is on), and then a function driver to interact with the DSP.

  • Jan