ADC Input Voltage Range

VamshiKrishna Rao Domudala

Other Parts Discussed in Thread: TMS320F28335, CCSTUDIO

Hello,

I am working on TMS320F28335 eZdsp Board. I have some problem with ADC input voltage range. I am building control loop in simulink and dumping code using CCStudio. When I provide ADC input voltagte more than 1Volt, PWM is reaching to saturation limit. I would like to use as 0-3Volts range. Can anyone please provide me some information about this issue.

over 9 years ago

0 Gautam Iyer over 9 years ago

Guru 192875 points

Hi,

F28335 ADC does have an ADC input voltage range of 0-3V. Check your ADC result registers to check the digital values.

Regards,
Gautam

0 VamshiKrishna Rao Domudala over 9 years ago in reply to Gautam Iyer

Prodigy 40 points

Hello Gautam,

I am not coding using CCStudio. I am using simulink pre-built blocks and designing my control logic. I am unable to see the updated values of ADC in CCStudio. Is there any other way to debug my logic.

Thank you

Best,
Krishna

0 Gautam Iyer over 9 years ago in reply to VamshiKrishna Rao Domudala

Guru 192875 points

Krishna, I'm unaware of simulink C2000 interface. Let me know if you plan to go with pure CCS coding.

Regards,
Gautam

0 VamshiKrishna Rao Domudala over 9 years ago in reply to Gautam Iyer

Prodigy 40 points

Hello Gautam,

I am unable to see updated values in CCS ADC result registers. How to connect board to CCS for updated registers. I am varying the analog input voltage to ADC but there is no variation in the ADC result register. Could you please help me to solve this issue.

Thank you

Best,
Krishna

0 Gautam Iyer over 9 years ago in reply to VamshiKrishna Rao Domudala

Guru 192875 points

Hi Krishna,

Which sample code are you using or still with simulink CCS interface? Also, can you paste the screenshot where you're monitoring these ADC results?

Regards,
Gautam

0 VamshiKrishna Rao Domudala over 9 years ago in reply to Gautam Iyer

Prodigy 40 points

Hello,

Same Simulink. Because I need to start from scratch if i go for coding. I am watching it in GEL>Watch ADC Registers> ADCResult0_7. I am unable to upload screenshot.

And I guess I am unable to debug code using CCS studio. How to dump code into flash and how to use debugging mode.

Thanks
Krishna

0 Gautam Iyer over 9 years ago in reply to VamshiKrishna Rao Domudala

Guru 192875 points

Krishna, are you following any procedure or tutorial? If not, youtube has lot of such videos that you can refer.

Regards,
Gautam

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ADC Input Voltage Range