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Keypad with I2c extender
February 24, 2020
4:14 pm
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Muzikansky
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December 11, 2019
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Hello,

I want to read 4x4 matrix keypad with I2c expander. Is there Labview example to read 4x4 matrix keypad with I2c expander?

I tried to write some vi to execute it. I can change I2c expander P0-P7 outputs by I2C Write Byte.vi, but I2C Read.vi always responds xFF and P0-P7 are not affected. Is I2C Read.vi set I2c expander P0-P7 as inputs?

Is it possible to set I2c expander 4 bits as Out and 4 bits as Input?

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