TSW1400EVM: Double the amount of data stored on the device

jiaxuan liu

Part Number: TSW1400EVM
Other Parts Discussed in Thread: ADS4249EVM

Hi everyone

I use TSW1400EVM to collect data from ADS4249EVM and save it as .bin file. But when I use Matlab to read it, it shows double the amount of data stored on the device. But the figure in Matlab is similiar with the firure in HSDC Pro. So I want to ask if the data is double stored. And how to store data and read data correctly.

Figure 1 and figure 2 is same data from HSDC Pro and Matlab. It easy to find signal period points doubled after data read by Matlab.

This is the register setting for ADS4249EVM.

Matlab read bin codes are:

filename = 'ADC Temp.bin';

fid = fopen(filename,'rb');

[tempmat,~] = fread(fid,[65536*2 1],'int16');

fclose(fid);

It can find I can read points' count is 65536*2. But I set capture points' count is 65536.

Regards

Jiaxuan

over 4 years ago

0 Chase W over 4 years ago

TI__Mastermind 24550 points

Hello Jiaxuan,

I'm wondering if the doubled amount of data is related to the channel 2 data? If possible, can you provide us with the bin file ('ADC Temp.bin') of the data so we can take a look next week?

Regards, Chase

0 jiaxuan liu over 4 years ago in reply to Chase W

Prodigy 85 points

Hi, Chase

Nice to see you again. I'm not sure about channel 2. But when I save data as .csv, it will save data from both CHA and CHB. And it seems cannot upload data in e2e. Can you privide another way to receive it?

Regards

0 Chase W over 4 years ago in reply to jiaxuan liu

TI__Mastermind 24550 points

Hi Jiaxuan,

I have sent a private message to you containing my contact information. Please update me when you send the data so I can confirm if I have received it.

Regards, Chase

0 jiaxuan liu over 4 years ago in reply to Chase W

Prodigy 85 points

Hi Chase,

I have sent the data from my email to your email. Thanks for your help.

Regards

0 Chase W over 4 years ago in reply to jiaxuan liu

TI__Mastermind 24550 points

Hi Jiaxuan,

I have received the data and will review it shortly.

Regards, Chase

+1 Chase W over 4 years ago in reply to Chase W

TI__Mastermind 24550 points

Hello Jiaxuan,

I always forget how the data formats are saved - I have to remind myself each time a question like this comes up :) .. Saving the data as a .bin interleaves the channels together, sample by sample across the channels. Please find the attached code to parse the HSDC Pro bin correctly for dual channel ADC. The commented line will output a CSV which matches the HSDC Pro CSV file data which you provided. Hope this helps!

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/73/parse_5F00_HSDC_5F00_bin.m

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/73/ADC-Temp.bin

testcode.csv

Regards, Chase

0 jiaxuan liu over 4 years ago in reply to Chase W

Prodigy 85 points

Hi Chase

Thanks for your help and it really works.

Regards

Data converters

Data converters forum

TSW1400EVM: Double the amount of data stored on the device