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Part Number: MSP432P401R
Tool/software: Code Composer Studio
I am looking at an application where i need to implementing an algorithm on samples obtained simultaneously from a pair of inputs. Can the ADC14 module be used with driverlib?
To clarify, when 2 external inputs are used, which of the following occurs:
a) The sample and hold module samples all inputs simultaneously but conversion occurs one after the other with each channel result stored in a separate memory buffer.
b) The sample and hold module will perform a full sample and convert cycle on one input channel, then proceed to perform another sample and convert cycle on the next channel.
Approach a) will be ideal for my algorithm.
David,
Figure 22-1 in the MSP432 Technical Reference manual (below) shows that the sample-and-hold unit is AFTER the multiplexer. Thus, the sample and hold operates on only 1 channel at a time. If you want to sample 2 channels simultaneously, then you would have to either sample them quickly back-to-back if your application can tolerate the (~1us) time offset of doing this, or take 3 samples (in the pattern Ch.A, Ch.B, Ch.A) and interpolate to get the approximate A value that would exist at the time that Ch. B is sampled.
Regards,
Bob L.
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