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MSP430 I/O Port failure?
#1
Hi All,

I build my MSP430 scale controller, using the excellent instructions.
I used the TI Launchpad for this, and loaded the firmware for glass quadrature scales.
It all works ok for most I/O ports. I already assembled the components in a housing, and connected the scales on my lathe.

However, when using the Y-scale, connected to the P2.1/P2.4 ports, it doesn't. The read-out in the App changes a little in the last digits, similar to when one of the connections is not correct.
I did verify that when using the same wiring from that scale to one of the other inputs, X, Z, etc. , it all works fine.

I wonder whether the P2.1/P2.4 I/O ports on my Launchpad or within the MSP430 are broken.??
Is there any simple program to verify whether these ports are  working? E.g. reading the port for high or low and then blinking a LED???
Or could this be caused by an issue in the firmware?

Thanks for your help,
Frans
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