CCS/TMS320F280049C: AIOs support digital input mode

UserHomeInit

Tool/software: Code Composer Studio

Dear TI Hello,

I am using the ADC and CMPSS for current measurement and over/under current protection,

I notice an "AIO" Digital input on ADC pin in the following capture and i am curios to know for any purpose it could be used,

Thank you in advance,

S.Tarik,

Regards,

over 6 years ago

0 Devin Cottier over 6 years ago

TI__Guru 60865 points

Hi S.Tarik,

These are used as a digital input when you don't want to use the pin as an analog input.

So say you have some leftover analog pins that aren't being used for ADC or CMPSS, you can instead use them to read the digital state of some external source, say maybe the state of a user-selectable DIP switch.

0 UserHomeInit over 6 years ago in reply to Devin Cottier

Expert 2225 points

Hi Devin,

OK, I see,

How i could read this input using the ReadPin TI function for example?

0 Devin Cottier over 6 years ago in reply to UserHomeInit

TI__Guru 60865 points

Hi S.Tarik,

I believe you can read these like any other GPIO using that function. These are all in last GPIO bank, so the numbers are 223 to 255.

You may have to enable the GPIOs first though; they are initially disabled so as to not interfere with normal analog functionality.

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CCS/TMS320F280049C: AIOs support digital input mode