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    uint8_t buffer[8];
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    uint8_t buffer[8];
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    buffer[0] = 0x00;   // Starting register address
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    buffer[0] = 0x00;   // Starting register address
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    buffer[1] = 0xFF;   // IODIR, Set all pins as inputs
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    buffer[1] = 0xFF;   // IODIR, Set all pins as inputs
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    buffer[2] = 0xFF;   // IPOL, Reported values are inverted
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    buffer[2] = 0xFF;   // IPOL, Reported values are inverted
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    buffer[3] = 0xFF;   // GPINTEN, Enable interrupt-on-change
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//    buffer[3] = 0xFF;   // GPINTEN, Enable interrupt-on-change
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    buffer[3] = 0x00;   // GPINTEN, Disable interrupt-on-change
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    buffer[4] = 0x00;   // DEFVAL, IOC default values
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    buffer[4] = 0x00;   // DEFVAL, IOC default values
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    buffer[5] = 0x00;   // INTCON, IOC compare to previous value
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    buffer[5] = 0x00;   // INTCON, IOC compare to previous value
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    buffer[6] = 0x00;   // IOCON, Incrementing address, active-low interrupt cleared on GPIO read
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    buffer[6] = 0x00;   // IOCON, Incrementing address, active-low interrupt cleared on GPIO read
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    buffer[7] = 0xFF;   // GPPU, Enable pull-ups on all pins
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    buffer[7] = 0xFF;   // GPPU, Enable pull-ups on all pins
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