TSW1400EVM: Convert binary file to integer values

Josel Go

Part Number: TSW1400EVM

Hi Experts,

Good day.

My question is about the binary file data of a measurement with the TSW1400 EVM and the AFE583 (recorded with the HSDC Pro v. 4.7).

A test measurement (sine wave) was recorded on ch1 (the other 31 channels are floating). In order to be able to transform the binary file the CSV file was recorded as well (to be able to compare the transformed values).
At the moment I am trying to get the same values from the binary and the csv file.

Can you tell me how I have to convert the values in the binary file in order to get the real measured values? Here is the starting sequence of the bin file:
b'\xec\x05\x96\x08\xd1\x07\xb5\x07\xc5\x07\\\x07\xfe\x07\xba\x07\x02\x08\xd8\x07\x1b\x08\xce\x07\xc5\x07\xe7\x07\x12\x08\xc8\x07\xb4\x07\xe1\x07\x16\x08\x1b\x08\x1e\x08\xff\x07M\x08\x99\x07\x08\x08'

The first two lines of my CSV are:

-532 150 -47 -75 -59 -164 -2 -70 2 -40 27 -50 -59 -25 18 -56 -76 -31 22 27
30 -1 77 -103 8 92 104 113 103 -55 49 -34

-120 151 -45 -70 -58 -166 -4 -69 1 -28 28 -44 -58 -26 18 -58 -76 -30 22 31
35 1 77 -106 7 90 106 114 104 -54 49 -35

I already read this article High Speed Data Converter (HSDC) Pro Software Output Binary File Format - Data converters forum - Data converters - TI E2E support forums but with the here described solution I didn’t get the same values as in the CSV file.

I am looking forward to your help.

Regards,

over 2 years ago

0 Chase W over 2 years ago

TI__Mastermind 24150 points

Please attach the .bin file and the .csv file so I can create a script.

0 Josel Go over 2 years ago in reply to Chase W

TI__Expert 6715 points

Hi Chase,

Attached to this mail are the two files you're requested. The sine wave is stored in ch1.

New Compressed (zipped) Folder.zip

Regards,

Josel

0 Chase W over 2 years ago in reply to Josel Go

TI__Mastermind 24150 points

Josel,

Please find MATLAB script attached which can perform this conversion. If customer wants Python version instead, please let me know and I can quickly create a python version as well.

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/73/parse_5F00_bin_5F00_data.m

Regards, Chase

0 Chase W over 2 years ago in reply to Chase W

TI__Mastermind 24150 points

Attached is a python version of the same script above. hsdc_pro_bin_to_csv.zip

To download, please click on the top right of the code preview window.

Fullscreen hsdc_pro_bin_to_csv.py Download

import numpy

''' user input parameters '''
file_name = 'Reference_5MHz_Sine_Ch1.bin'
newCSVfilename = 'generated_csv_file.csv'
num_channels = 32
adc_resolution = 12

''' Open file '''
f = open(file_name, "r")
data = numpy.fromfile(f, dtype=numpy.uint16)
f.close()

''' manipulate data '''
shifted_data=[]
for sample in data: # convert to 2s complement by subtracting the midcode (adc_resolution-1):
    shifted_data.append(sample-2**(adc_resolution-1))
num_samples = int(len(shifted_data)/num_channels)
shifted_data = numpy.array(shifted_data) # convert list to numpy array for reshape

samples = shifted_data.reshape(num_samples,num_channels) # Change single column of samples into matrix where each row is a new channel
# Transposing to match CSV format is not needed with this python script as shown in the matlab script for saving. To read data, transposing is needed as shown in line 28 of this script

''' Save matrix as csv '''
numpy.savetxt(newCSVfilename,samples,delimiter=',',fmt='%i')

''' Plotting first 100 pts of channel 1 '''
samples=samples.T

import matplotlib.pyplot as plt

plt.plot(samples[0])
plt.xlim([1,100])
plt.title('Time-domain Signal')
plt.xlabel('Sample #')
plt.ylabel('Codes')
plt.show()

Regards, Chase