DAC81416-08EVM: Problem launching script window in the DAC81416-08EVM GUI

Is scripting possible through other means?

Hi Sanjay,

I tried running the function regRead, the python program returns 0xFFFF for any register I try to read.

I have not explored other functions yet.

Is there a ready to use code specifically for DAC81416

EDIT: Also I am running this code on 64bit windows PC

Hi Pranav,

Can you please probe and confirm if the SPI signals are coming on the EVM? 

Thanks,
Sanjay

Hi Sanjay,

Before I do that could you please confirm whether the provided dll file can be used in a 64bit windows machine?

Regards,
Pranav

Hi Pranav,


Yes, we can use this file in 64bit win system.

Thanks,
Sanjay 

Thanks Sanjay,

TEMPOUT pin outputs 5V is that normal? (measured via TP7)

Hi Pranav,

Please detailed functionality of the TEMPOUT pin below.

In normal operating condition around 25C, output should be below 1.34V.

Thanks<
Sanjay

Thanks Sanjay, what I noticed is TEMPOUT outputs 5V when DAC is in power down state and outputs a value as shown in this screenshot when the DAC is in power on state. Is that a feature of the EVM or the DAC itself? I am not able to find any information regarding this in the DAC EVM guide or the DAC datasheet.

Looks like this pin is pulled high to VDD when the DAC is in power down state, could you please escalate this to the concerned person so that the datasheet or the EVM can include this information?

Here is a screenshot of the DAC EVM schematic, DAC_CS is connected to ADBUS1
 

However in the libMPSSE - SPI library the documentation says only ADBUS3, ADBUS4, ADBUS5, ADBUS6, ADBUS7 can be used for chip select
Page number 13 of User Guide For libMPSSE - SPI


Further the python code you have provided sets the CS line to ADBUS3, in generic_spi.py line 46


Despite all this, the DAC EVM works through the GUI as expected, this makes me suspect a mistake in the schematic drawing. Could you please provide me with the right schematic so that I can write my own python code? 

This is not acceptable and frustrating; I have spent a considerable amount of my time trying to get this DAC to work only to realize there could be mistakes in the python code and/or the schematics. 

Please get back to me at the earliest.

Thank you.

Hi Pranav,

Thanks for the inputs. I will go through it and will come back to you by Monday.

Thanks,
Sanjay

Hi Pranav,
 

I have sent a mail, let's connect over to call to resolve the issue. 
 
Thanks,
Sanjay

Dear Sanjay,

With all due respect I do not want to be spending my time helping TI fix their bugs and confusing documentation, however since I have no choice now, let us get on the call and try to resolve the issue. I will check my mail.

Regards,
Pranav.