TM4C129XL.....Analogic Input

Jefferson Ernesto Leite

Hi, I 'm having dificult to work with analogic input, someone send me a exemplo using a analogic input, I' m using a potenciometro....may board is a TM4C129XL and may e-mail is jefrysp@gmail.com...

Thank you.....

Jeff......

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over 10 years ago

0 Amit Ashara over 10 years ago

TI__Guru**** 244400 points

Hello Jefferson,

Did you check the examples/peripheral/adc directory in TivaWare for using the ADC?

Regards
Amit

0 Jefferson Ernesto Leite over 10 years ago in reply to Amit Ashara

Prodigy 80 points

Hello, I' dont know the why, but have not exemples using ADC, just using digital input/output.....I'm looking for a exemple....I' m studying Keil uVision5.

thank you for the attention........

0 Amit Ashara over 10 years ago in reply to Jefferson Ernesto Leite

TI__Guru**** 244400 points

Hello Jefferson,

I am not sure I understand. You mentioned Analog inputs but not ADC. Please clarify what is that you want to do?

Regards
Amit

0 Jefferson Ernesto Leite over 10 years ago

Prodigy 80 points

I'm learning to work with TM4C129XL board and I need to monitor an analog input ( PE1 ) . I configured the analog input and created a research-based logic I got on the internet but did not succeed .

II'm learning to work with TM4C129XL board and I need to monitor an analog input ( PE1 ) . I configured the analog input and created a research-based logic I got on the internet but did not succeed .

I just want through a potentiometer connected on PE1 monitor the analog value of it.

At the moment I can only work with digital inputs.

If you can help me I would greatly appreciate it .

0 Amit Ashara over 10 years ago in reply to Jefferson Ernesto Leite

TI__Guru**** 244400 points

Hello Jefferson,

What do you want to do with the Analog Input? You want to run it through an ADC or Analog Comparator?

Regards
Amit

0 Jefferson Ernesto Leite over 10 years ago

Prodigy 80 points

Hi......I will like to read the valor analogic (PE1.....0 - 3,3V or 5V) and light the leds (PN1,PN0,PF4 and PF0)......

Thank you....

0 Amit Ashara over 10 years ago in reply to Jefferson Ernesto Leite

TI__Guru**** 244400 points

Hello Jeff

In digital mode the IO's will only resolve logic 1 and 0. You would need to configure 2 GPIO's in Analog mode for differential ADC reading. To do so the pair of pins would be PE1 and PE0. Then convert the same using differential ADC settings and use the values to light up the LED's

An example code is

C:\tinotouch\TivaWare_C_Series-2.1.1.71\examples\peripherals\adc\differnetial.c

Regards
Amit

0 Jefferson Ernesto Leite over 10 years ago in reply to Amit Ashara

Prodigy 80 points

OK thank you for the help, I'm download the software, kits and I will check your tip...

Thank you....

0 Jefferson Ernesto Leite over 10 years ago

Prodigy 80 points

Hello , I can have precision analog input 0-5mV working , or do I need to amplify ? I have 3 load cells fed 5Vdc they return 0-5mV ( 0-5Kg ) . I can configure the input to work in this range in mVolts ?

Thanks ..........

0 cb1_mobile over 10 years ago in reply to Jefferson Ernesto Leite

Guru 117855 points

Appears that last post lacks its (usual) "like."

0 Jefferson Ernesto Leite over 10 years ago

Prodigy 80 points

Thankyou for de help.....May analogic imput is working.........

0 Amit Ashara over 10 years ago in reply to Jefferson Ernesto Leite

TI__Guru**** 244400 points

Hello Jefferson.

Can you share your code as well on the forum so that we can spend less time understanding the requirement in the future.

Regards
Amit

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TM4C129XL.....Analogic Input