I had a requirement to do some filter testing and needed to generate a test
bench with some flexibility.
For this discussion a “component” is an onchip resource.
Below two DDS components generating two tones. Each tones length in # cycles is
controlled by the burst counter. It counts the cycle finished signal coming out of
each wavedac. I choose to have both bursts equal length, could have added another
burst counter so that individual bursts could be controlled. Tones of course different
frequencies.
The system can issue a burst on a key press or put into a mode of generating continuous
bursts. The delay between bursts set by WaveTrainInterval timer/counter.
7 lines of code written, all start instruction for the components. In terms of expediency
while running no user interface is present to control settings, just do that by right clicking
component and entering its settings, then hitting the build/program button. Could have
built user interface but time precluded that and this is a one off.
All done on one chip, PSOC 5LP family part. Posted just to show how much can be done
with a programmable routable part with lots of analog and digital resources and not much
coding.
I chose to burst sines but any other arbitrary waveform could have been done. Posted
just to show what todays tools can do and the ease with which ideas can be prototyped
I think I could have fit 4 channels of this on one chip. Not too shabby.
Regards, Dana.
bench with some flexibility.
For this discussion a “component” is an onchip resource.
Below two DDS components generating two tones. Each tones length in # cycles is
controlled by the burst counter. It counts the cycle finished signal coming out of
each wavedac. I choose to have both bursts equal length, could have added another
burst counter so that individual bursts could be controlled. Tones of course different
frequencies.
The system can issue a burst on a key press or put into a mode of generating continuous
bursts. The delay between bursts set by WaveTrainInterval timer/counter.
7 lines of code written, all start instruction for the components. In terms of expediency
while running no user interface is present to control settings, just do that by right clicking
component and entering its settings, then hitting the build/program button. Could have
built user interface but time precluded that and this is a one off.
Code:
int main(void)
{
CyGlobalIntEnable; /* Enable global interrupts. */
/* Place your initialization/startup code here (e.g. MyInst_Start()) */
DDS1_Start( );
DDS2_Start( );
BurstCntr_Start( );
WaveDAC81_Start( );
WaveDAC82_Start( );
Opamp1_Start( );
WaveTrainInterval_Start( );
for(;;)
{
/* Place your application code here. */
}
}with a programmable routable part with lots of analog and digital resources and not much
coding.
I chose to burst sines but any other arbitrary waveform could have been done. Posted
just to show what todays tools can do and the ease with which ideas can be prototyped
I think I could have fit 4 channels of this on one chip. Not too shabby.
Regards, Dana.
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