MSP432P4111: ADC_channel_error

sasi kumar1

Part Number: MSP432P4111

I tried to initialize 4 ADC channels A0, A1, A2, A3 for channels A1 and A3 I am getting the desired output whereas A0 and A2 provide irregular results, I interchanged the input channel select and found that any ADC14MEM which select input channels as A0 and A2 provides irregular results, Does this mean the ADC channels are damaged or can it be calibrated.

Thanks & regards,
Sasikumar E

over 5 years ago

0 Bruce McKenney over 5 years ago

Guru 100845 points

Damage is always a possibility, but the first question(s) would be configuration:

1) Are all 4 channels the same kind of device? [I'm thinking of source impedance here.]

2) Are the P5.3/5 GPIOs configured properly? [PSEL=11]

In what way are the results irregular? Noise? Level constant but incorrect?

0 sasi kumar1 over 5 years ago in reply to Bruce McKenney

Expert 1120 points

All 4 channels are same kind of device

yes all the four PINS belong to the same port and properly configured

Level constant but incorrect(there is no linear change)

0 Leonardo Estevez over 4 years ago in reply to sasi kumar1

TI__Genius 12615 points

Hi Sasi,

When you provide ground and VCC(from the Launchpad) to these channel inputs - do you still see irregularities in the results? Can you confirm that you see this same behavior when using our Launchpad?

BR,
Leo

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MSP432P4111: ADC_channel_error