Digital discovery pattern generator

[Noa]

Hi, 

I am using digital discovery waveforms SDK, and I'm trying to use the pattern generator function to send a custom signal.

the code I am using:

Device_data = device.open()

logic.open(Device_data, buffer_size=4096)

pattern.generate(Device_data, channel=data_channel, function=pattern.function.custom, frequency=bclk, data=pdm_samples.tolist())

 

the data I am sending is a list of integers I've created.

I keep getting this error:

WF_SDK.device.error: Error: pattern -> generate -> Invalid bit count provided.

 

what could cause this error?

 

thanks,

Noa

[attila]

Hi @Noa

Probably you are trying to set more bits than the device supports, 32768

[niko11]

Hello, i have a similar error. trying to make 2000+ bit (?) signal: 

PATTERN_FREQUENCY = 2*200e3; PULSE_DUTY_CYCLE = 30; LATCH_PATTERN_LENGTH = 1023; SAMPLERESET_PATTERN_LENGTH = 5;
    DIO_LATCH = 7;  
    
    VLATCH_PATTERN =  (2*SAMPLERESET_PATTERN_LENGTH+1) * [0, 1] + [0, 1]*LATCH_PATTERN_LENGTH; 
    
    device_data = device.open(); logic.open(device_data, sampling_frequency=3*PATTERN_FREQUENCY, buffer_size=4096); 
    
    pattern.generate(device_data, channel=DIO_LATCH, function=pattern.function.custom, \
                        frequency=PATTERN_FREQUENCY, duty_cycle = PULSE_DUTY_CYCLE, data = VLATCH_PATTERN); 

and i am getting the same error:  "Invalid bit count provided"

Could you help me what is my mistake?

Edited July 25, 2023 by niko11

[niko11]

the trick was done by : device.open(config=3);

Edited July 27, 2023 by niko11

[attila]

Hi @niko11

Are you sure you are using Digital Discovery ? This has one configuration.