MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Spezifikationen PDF herunterladen (Seite 109)

Reviewing the C Source Code

Connecting to I/O Devices

7-5

while (TRUE) {

/* Read a new volume when the hosts send it */

if (!RTDX_channelBusy(&control_channel)){

RTDX_readNB(&control_channel, &volume, sizeof(volume));

}

while (!RTDX_isInputEnabled(&A2D_channel)){

RTDX_Poll(); /* poll comm channel for input */

}

* A2D: get digitized input (get signal from the host through

* RTDX). If A2D_channel is enabled, read data from the host.

RTDX_read(&A2D_channel, input, size*sizeof(sample));

* Vector Scale: Scale the input signal by the volume factor to

* produce the output signal.

while(size--){

*output++ = *input++ * volume;

}

size = BUFSIZE;

input = inp_buffer;

output = out_buffer;

* D2A: produce analog output (send signal to the host through

* RTDX). If D2A_channel is enabled, write data to the host.

RTDX_write(&D2A_channel, output, size*sizeof(sample));

while(RTDX_writing){

RTDX_Poll(); /* poll comm channel for output */

}

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MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Spezifikationen Seite 109