TMS320F28377S: ADC inputs Simulink

Juan Antonio Ocampo Wilches

Part Number: TMS320F28377S

Good afternoon,

I´m having some troubles to use the ADC inputs of my TMS320F28377S, I'm working from Simulink. I have read the helps of Matlab, but I have troubles identifying the relation of the ports and to understand it,

in the help they explain that it´s necesary to configure the clocks: https://la.mathworks.com/help/supportpkg/texasinstrumentsc2000/ug/configuring-acquisition-window-width-for-adc-blocks.html

but in the window that appears for my micro, appears a compleatelly different information, I open the help system proposed in matworks but the input channel only saids ADCIN1 but my card have A and B inputs, I configure the parameters in the other page of the interface but i connect a constant signal in the stablished pin and don't obtain any signal in the scope in simulink

over 5 years ago

0 Devin Cottier over 5 years ago

TI__Guru 60865 points

Hi Juan,

Not sure on the Simulink part, but you want the following settings:
SYSCLK = <200MHz
ADCCLK = <50MHz (so divider is SYSCLK / 4)
Acquisition Window (if using 12-bit ADC) = > 75ns, so ACQPS >14
Acquisition Window (if using 16-bit ADC) = >320ns, so ACQPS >63

And channel 'A2' means ADC module 'A' channel '2'.

I'll contact Matworks for additional support

0 Juan Antonio Ocampo Wilches over 5 years ago in reply to Devin Cottier

Prodigy 60 points

Thanks for your help,

I will try again with those settings

Best regards, Juan Antonio

0 venkatesh chilapur over 5 years ago in reply to Juan Antonio Ocampo Wilches

Mastermind 6460 points

Hi,

Please note, the input channel lists channel numbers 1-16 - i.e ADCIN0 - ADCIN15 on 'Input Channels' Tab.

And it lists the 'ADC module' under the SOC Trigger Tab. You will have to select the appropriate module for your ADC from this drop down. Like you said you have ADC module B, you may select the same.

Also, please select F2837xS as the device from 'hardware board' drop down.

Do ensure to test the reading once in CCS for the given ADC pin which is being used in Simulink.

Contact Mathworks technical support if issue persists.

0 Juan Antonio Ocampo Wilches over 5 years ago in reply to venkatesh chilapur

Prodigy 60 points

How can I test the reading in CCS for that pin?

0 venkatesh chilapur over 5 years ago in reply to Juan Antonio Ocampo Wilches

Mastermind 6460 points

The reason to test with CCS is to ensure the pin connections are ok and that we are trying to read from correct input. CCS provides many examples out of which you can start with example to read ADC value and ensure the pin from which to read is configured in CCS application. Try now the same pin configuration in Simulink and see if the value is reflected. Please connect to us at:

in.mathworks.com/.../contact_us.html

for more assistance.

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TMS320F28377S: ADC inputs Simulink