TMS320F28377S: TMS320F28377S

Muhammed Adel

Part Number: TMS320F28377S

Hello everyone

i wish you are well

Iam working on a project which needs to read 6 analog inputs . There is a probelm appears when using analog channels from the same module . so how can i use multible channels using F28377s defino ?

thanks for helping me :)

over 8 years ago

0 Devin Cottier over 8 years ago

TI__Guru 60865 points

Hi Muhammed,

What specific issue are you having with using multiple inputs from the same ADC? Can you not get any conversions? Are the conversions inaccurate? Is the SW not working consistently?

0 Muhammed Adel over 8 years ago in reply to Devin Cottier

Intellectual 265 points

when trying to read different ADC values from two different channels of ADC-A using Simulink, however, one channel always seems to "copy" the value of the other. the same problem appears if i use B module too

0 Devin Cottier over 8 years ago in reply to Muhammed Adel

TI__Guru 60865 points

Hi Muhammed,

Can you post how you have configured the ADC module in Simulink? I have asked someone from Mathworks to take a look.

0 Brian McKay over 8 years ago

Mastermind 9005 points

What release of CCS and Simulink are you using? Are you able to verify the HW is working correctly using CCS?

-Brian

0 Muhammed Adel over 8 years ago in reply to Devin Cottier

Intellectual 265 points

Hi Mr Devin
first i choose the ADC module A
-choose ADC resolution (12-bit single ended)
-Source of trigger i choose (SOC0)
-SOCx acquisition window (7)
-SOCx trigger source (epwm2_ADCsocB)
-ADCINT (NO ADCINt)
-Sampling time (-1)
-Data type (uint16)
from input chanels tab
i choose from the menu (ADCIN0)

i did the same for the another ADC Exept the number of the channel

0 Muhammed Adel over 8 years ago in reply to Brian McKay

Intellectual 265 points

Hello Mr Brian

CCSV6 , Simulink 2016a. yes my kit F28377s is verified inside CCSV6

0 Devin Cottier over 8 years ago in reply to Muhammed Adel

TI__Guru 60865 points

Hi Muhammed,

This may not be your issue, but S+H duration of 7 sys clocks is much too short. Assuming you are running at 200MHz, 7 cycles is only 35ns. Minimum per the datasheet is 75ns, and you may need longer if your input isn't very low impedance and buffered locally on the PCB.

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TMS320F28377S: TMS320F28377S