Initializing the hardware

The xxxInit.c file contains the code to initialize and shut down the hardware. If you are developing on a SVR5 system, study the sample nte driver for details about how to do this. The logic for initializing that driver is:

xxxSetup

This routine is passed a pointer to the ddxScreenRequest(D4nfb) structure.

xxxInit

initialize the screen:

• Initialize the ddxScreenInfo(D4nfb) structure. Note that much of this structure is populated by NFB itself if you use the nfbScreenInit(D3nfb) function; when using one of the other ScreenInit( ) functions, you must populate the whole structure in your driver code.

• Call the InitHW( ) routine to initialize the hardware. InitHW( ) calls the SetGraphics(D3nfb) function to put the adapter in graphics mode. SetGraphics( ) is coded in the xxxScreen.c file and typically calls the SetGraphics( ) routine from the grafinfo(DSP/4dsp) file.

xxxCloseScreen

Frees structures when the device is closed.

xxxDfbInit

Initialize the driver's dumb frame buffer.