HP EZ-KIT Manual de usuario descargar pdf (Pagina 63)

Getting Started with ADSP-BF548 EZ-KIT Lite 3-17

Using ADSP-BF548 EZ-KIT Lite Peripherals

{

case (ADI_AC97_EVENT_REGISTER_ACCESS_COMPLETE):

reg_update_complete = true;

break;

case (ADI_DEV_EVENT_BUFFER_PROCESSED):

/* signal that this transfer has completed */

/* ..get address of this buffer descriptor */

pdesc = (ADI_DEV_1D_BUFFER*)pArg;

/* ..extract address of flag and set it */

pflag = (volatile bool*)pdesc->CallbackParameter;

*pflag = true;

break;

default:

printf(“Unexpected audio device callback. “

“Event code: 0x%08X\n”,Event);

break;

}

/* return */

}

Example 4: Running

It has taken a lot more effort to describe how to use a typical device driver

than it does to actually use it! To observe the device driver in action, open

and build the Example_4.dpj project located in

<install_path>\Blackfin\Examples\ADSP-BF548 EZ-Kit Lite\Getting

Started Examples\Example_4

. On the EZ-KIT Lite, plug a pair of head-

phones or powered speakers into the audio socket labelled LINE OUT (it is

the single-tier socket beside the two double-tier sockets) and press F5 to

run the project. You will hear the phrase “An orange-colored sky” spoken

five times with a short pause between repetitions.

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HP EZ-KIT Manual de usuario Pagina 63