MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Specifiche Scaricare il pdf (Pagina 96)

Reviewing the Source Code Changes

6-6

This function uses RTDX API functions to change the load of the processing

signal in real time. Notice the following aspects of these changes:

❏

The call to RTDX_enableInput enables the input channel called

control_channel so that data can flow on it from the host to the target. At

run time, a Visual Basic host client writes a load control value on that

channel, thereby sending it to the target application.

❏

The call to RTDX_readNB asks the host to send a load control value on

the control_channel and stores it in the variable called control. This call is

non-blocking; it returns without waiting for the host to send the data. The

data is delivered when the host client writes to control_channel. From the

time of the call to RTDX_readNB until the data is written to the variable

control, this channel is busy, and no additional requests can be posted on

this channel (that is, calls to RTDX_readNB do not succeed). During that

time, the call to RTDX_channelBusy returns TRUE for control_channel.

❏

The processingLoad = control; statement sets the processing load to the

value specified by the control.

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MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Specifiche Pagina 96