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\ P1.3 Port test
\ Using Mecrisp-Across on A F4 Disco Host, target = MSP430G2201IRSA16R
\ Set P1.3 high with internal pullup and read P1 to confirm P1.3 is high.
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\ GPIO 1 ports are numbered P1.0 - P1.7
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\ Read power up defaults, note may vary with floatting pins etc
\ P1IN c@ pbb 00000000 ok.
\ P1OUT c@ pbb 11111110 ok.
\ P1DIR c@ pbb 00000000 ok.
\ P1IFG c@ pbb 00000000 ok.
\ P1IES c@ pbb 11111111 ok.
\ P1IE c@ pbb 00000000 ok.
\ P1SEL c@ pbb 00000000 ok.
\ P1REN c@ pbb 00000000 ok.
\ Pullup/Pulldown Resistor Enable
\ -------------------------------
\ .2.4 Pullup/Pulldown Resistor Enable Registers PxREN
\
\ Each bit in each PxREN register enables or disables the pullup/pulldown resistor of the corresponding I/O
\ pin. The corresponding bit in the PxOUT register selects if the pin is pulled up or pulled down.
\
\ Bit = 0: Pullup/pulldown resistor disabled
\ Bit = 1: Pullup/pulldown resistor enabled
\ Resistor UP or Down ?
\ ---------------------
\ If the pin's pullup/pulldown resistor is enabled, the corresponding bit in the PxOUT register selects pullup
\ or pulldown.
\
\ Bit = 0: The pin is pulled down
\ Bit = 1: The pin is pulled up
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\ Set up P1-3 as high in input mode using a internal pullup
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\ Enable P1.3 Pullup/pulldown resistor
1 3 lshift P1REN c!
\ Select P1.3 resistor as pull up
1 3 lshift P1OUT c!
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\ Test P1.3
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\ Read P1 input register
P1IN c@ bin8.
\ -----> P1IN c@ bin8. 00001000 ok.
