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Accessing pins P2.3 and P2.4 on an MSP430FR5739

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I want to use Energia to program my MSP430FR5739. I have used the 34 pin variant which has two pins that are not on the dev board - P2.3 and P2.4. I am using these as analogue inputs.

I found another post which indicated that I could edit the pins_energia.h file with the following lines

static const uint8_t P2_3 = 31;
static const uint8_t A12 = 31;

Which should, on the face of it, get P2.3 working, but no success...

Any help would be appreciated!

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