ADS7128 GPIO Chain Walk Test
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Pair CH0->CH1: HIGH=HIGH LOW=LOW ... PASS
Pair CH1->CH2: HIGH=HIGH LOW=LOW ... PASS
Pair CH2->CH3: HIGH=HIGH LOW=LOW ... PASS
Pair CH3->CH4: HIGH=HIGH LOW=LOW ... PASS
Pair CH4->CH5: HIGH=HIGH LOW=LOW ... PASS
Pair CH5->CH6: HIGH=HIGH LOW=LOW ... PASS
Pair CH6->CH7: HIGH=HIGH LOW=LOW ... PASS

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RESULTS: 7/7 tests passed
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