Hi Paul, I believe your issue is because TA1 cannot output to P2.7. Looking at section 6.12 of MSP432P401R, MSP432P401M Mixed-Signal Microcontrollers you can see that P2.6 and P2.7 can be setup to output TA0.3 and TA0.4 respectively: Whereas, P7.6 and P7.7 can output TA1.2 and TA1.1 respectively: So it looks like you're trying to output to a pin that the TA1 can't output to. Section 6.9.3 of the above linked document shows which pins are conneted to which timerA outputs. Best regards, Caleb Overbay
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